/* ============================================================
   智课云应用样式
   ============================================================ */
:root {
  --sky: #0ea5e9;
  --sky2: #0284c7;
  --sky3: #38bdf8;
  --sky4: #7dd3fc;
  --sky-bg: #f0f7ff;
  --bg: #f0f7ff;
  --sky-border: #bae6fd;
  --sky-light: #e0f2fe;
  --card: #ffffff;
  --text: #0f172a;
  --text2: #334155;
  --muted: #64748b;
  --green: #10b981;
  --green2: #059669;
  --red: #ef4444;
  --gold: #f59e0b;
  --orange: #f97316;
  --purple: #8b5cf6;
  --blue: #3b82f6;
  --sidebar-w: 260px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --header-h: calc(58px + var(--safe-top));
  --radius: 14px;
  --shadow: 0 2px 12px rgba(14,165,233,.1);
  --shadow-md: 0 4px 20px rgba(14,165,233,.14);
  --shadow-lg: 0 8px 32px rgba(14,165,233,.18);
  --tab-h: calc(60px + var(--safe-bottom));
  --accent: var(--sky);
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
/* 流式字号：按视口平滑缩放，同时保留可读性上下限。rem 组件会自动继承这套比例。 */
html { font-size: clamp(100%, calc(.925rem + .14vw), 112.5%); scroll-behavior: smooth; }
html { scrollbar-gutter: stable; }
body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--sky-bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  font-size: 1rem;
}
body.app-modal-open { overflow: hidden; overscroll-behavior: none; }
html.app-modal-lock { overscroll-behavior: none; }
img, video, canvas, svg { max-width: 100%; }

::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-thumb { background: var(--sky-border); border-radius: 2px; }

/* ============================================================
   顶部栏
   ============================================================ */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  height: var(--header-h);
  background: linear-gradient(135deg, var(--sky2) 0%, var(--sky) 60%, #22d3ee 100%);
  display: flex; align-items: center; gap: .65rem;
  padding: var(--safe-top) max(.7rem, var(--safe-right)) 0 max(.7rem, var(--safe-left));
  box-shadow: 0 2px 16px rgba(2,132,199,.25);
}
.topbar-menu-btn {
  width: 38px; height: 38px; border: none; background: rgba(255,255,255,.15);
  border-radius: 10px; color: #fff; font-size: 1.05rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  transition: background .2s;
}
.topbar-menu-btn:hover { background: rgba(255,255,255,.25); }
.topbar-title { flex: 1; min-width: 0; display: flex; flex-direction: column; overflow: hidden; }
.topbar-school { font-size: .78rem; color: rgba(255,255,255,.82); font-weight: 400; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-class { font-size: .98rem; font-weight: 700; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-family: 'Noto Serif SC', serif; }
.topbar-actions {
  display: flex; align-items: center; gap: .4rem;
  min-width: 0; flex-shrink: 0;
}
.topbar-btn {
  min-width: 36px; height: 36px; border: 1px solid transparent;
  background: rgba(255,255,255,.14); border-radius: 10px;
  color: #fff; font-size: .92rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background-color .18s, border-color .18s, color .18s, box-shadow .18s, transform .18s;
  padding: 0 .55rem;
}
.topbar-btn:hover { background: rgba(255,255,255,.25); border-color: rgba(255,255,255,.18); }
.topbar-btn:active { transform: translateY(1px); }
/* 视图切换按钮：文字型，自适应宽度 */
#viewToggleBtn { font-size: .63rem; font-weight: 600; letter-spacing: -.01em; white-space: nowrap; gap:.2rem; }
#fullSemesterToggleBtn { font-size: .63rem; font-weight: 600; letter-spacing: -.01em; white-space: nowrap; gap:.2rem; }
#fullSemesterToggleBtn.active-toggle { background: rgba(255,255,255,.4); box-shadow: 0 0 0 1.5px rgba(255,255,255,.6) inset; }
/* 邮件按钮红点 */
.mail-badge { position:absolute;top:4px;right:4px;width:8px;height:8px;background:#ef4444;border-radius:50%;border:1.5px solid var(--sky2); }
/* schedule-only 按钮：只在课程表tab显示 */
.schedule-only-btn { display: flex; }
body:not(.tab-schedule) .schedule-only-btn { display: none !important; }

/* ============================================================
   顶栏“更多”面板
   - 手机 / 平板 / 窄桌面：完整文字菜单
   - 宽桌面：展开为没有外框的分级命令栏
   ============================================================ */
.topbar-more-btn { display: flex; position: relative; z-index: 263; }
.topbar-more-menu {
  display: none; position: fixed; top: calc(var(--header-h) + .4rem); right: max(.7rem, var(--safe-right));
  z-index: 262; width: min(224px, calc(100vw - 1.4rem - var(--safe-left) - var(--safe-right)));
  background: rgba(255,255,255,.98); border: 1px solid var(--sky-border);
  border-radius: 16px; padding: .45rem;
  box-shadow: 0 16px 42px rgba(15,23,42,.2), 0 2px 8px rgba(2,132,199,.14);
  flex-direction: column; gap: .18rem;
  max-height: calc(100vh - var(--header-h) - 1rem - var(--safe-bottom));
  max-height: calc(100dvh - var(--header-h) - 1rem - var(--safe-bottom));
  overflow-x: hidden; overflow-y: auto; overscroll-behavior-y: contain;
}
.topbar-more-menu.open { display: flex; }
.topbar-more-menu .topbar-btn {
  width: 100%; min-width: 0; min-height: 44px; height: 44px; justify-content: flex-start;
  gap: .62rem; padding: .5rem .62rem; color: var(--text); background: transparent;
  border-radius: 11px; font-size: .86rem; font-weight: 650; text-align: left;
}
.topbar-more-menu .topbar-btn:hover,
.topbar-more-menu .topbar-btn:active { background: var(--sky-bg, #f0f9ff); color: var(--sky2); }
.topbar-more-menu .topbar-btn i,
.topbar-more-menu .topbar-btn > span:first-child {
  width: 28px; height: 28px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px; background: var(--sky-bg, #f0f9ff); color: var(--sky2);
  text-align: center; flex-shrink: 0;
}
.topbar-more-label { white-space: nowrap; }
.topbar-more-menu .topbar-command-primary {
  margin-top: .22rem; min-height:44px; height:44px;
  background: var(--sky-light); color: var(--sky2);
  border: 1px solid var(--sky-border); box-shadow: none;
}
.topbar-more-menu .topbar-command-primary:hover,
.topbar-more-menu .topbar-command-primary:active {
  background: var(--sky-bg); color: var(--sky2); border-color: var(--sky3);
}
.topbar-more-menu .topbar-command-primary i {
  background: var(--sky2); color: #fff;
}
.topbar-more-menu #fullSemesterToggleBtn.active-toggle {
  background: var(--sky-light);
  color: var(--sky2);
  box-shadow: inset 0 0 0 1px var(--sky-border);
}
.topbar-more-menu .is-return-action {
  background: #e0f2fe;
  color: var(--sky2);
  box-shadow: inset 0 0 0 1px #bae6fd;
}
.topbar-more-menu .is-return-action:hover,
.topbar-more-menu .is-return-action:active {
  background: #bae6fd;
  color: var(--sky2);
}
.topbar-more-menu .is-return-action i {
  background: #fff;
  color: #0284c7;
}
.topbar-more-overlay {
  display: none; position: fixed; inset: 0; z-index: 250;
  background: rgba(15,23,42,.12); backdrop-filter: blur(1.5px);
  -webkit-tap-highlight-color: transparent; touch-action: manipulation;
}
.topbar-more-overlay.open { display: block; }

@media (min-width: 1100px) {
  /* 宽桌面：解除移动菜单的卡片外观，成为一条清晰、安静的命令栏。 */
  .topbar-more-btn { display: none; }
  .topbar-more-overlay { display: none !important; }
  .topbar-more-menu {
    display: flex !important; position: static;
    width: auto; min-width: 0; max-height: none; overflow: visible;
    flex-direction: row; align-items: center; gap: .35rem;
    background: transparent; border: 0; border-radius: 0;
    box-shadow: none; padding: 0;
  }
  .topbar-more-menu .topbar-btn {
    width: auto; min-width: 38px; min-height: 38px; height: 38px;
    justify-content: center; gap: .42rem;
    color: #fff; background: rgba(255,255,255,.11);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 10px; padding: 0 .68rem;
    font-size: .78rem; font-weight: 600;
  }
  .topbar-more-menu .topbar-btn i,
  .topbar-more-menu .topbar-btn > span:first-child {
    width: auto; height: auto; display: inline;
    background: transparent; color: inherit;
  }
  .topbar-more-menu .topbar-btn:hover {
    background: rgba(255,255,255,.23);
    border-color: rgba(255,255,255,.36);
  }
  .topbar-more-menu #viewToggleBtn,
  .topbar-more-menu #fullSemesterToggleBtn {
    font-size: .78rem; font-weight: 600; letter-spacing: 0; white-space: nowrap;
  }
  .topbar-more-menu #fullSemesterToggleBtn.active-toggle {
    background: rgba(255,255,255,.3); color: #fff;
    border-color: rgba(255,255,255,.55);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.16);
  }
  .topbar-more-menu .is-return-action,
  .topbar-more-menu .is-return-action:hover,
  .topbar-more-menu .is-return-action:active {
    color: var(--sky2); background: #fff; border-color: #fff;
    box-shadow: 0 5px 14px rgba(3,105,161,.2);
  }
  .topbar-more-menu .is-return-action i { color: inherit; background: transparent; }
  .topbar-more-menu .topbar-command-primary {
    margin-top: 0;
    color: var(--sky2); background: #fff; border-color: #fff;
    box-shadow: 0 5px 14px rgba(3,105,161,.2);
    font-weight: 750;
  }
  .topbar-more-menu .topbar-command-primary:hover,
  .topbar-more-menu .topbar-command-primary:active {
    color: var(--sky2); background: #f0f9ff; border-color: #e0f2fe;
  }
  .topbar-more-menu .topbar-command-primary i { color: inherit; background: transparent; }
  .topbar-more-label { display: inline; }
}

@media (min-width: 1100px) and (max-width: 1279px) {
  /* 中等桌面优先保住课表名称，命令栏使用图标并依赖明确的 title / aria-label。 */
  .topbar-more-menu .topbar-btn { width: 38px; padding: 0; }
  .topbar-more-menu .topbar-more-label { display: none; }
  .term-schedule-select { max-width: 168px; }
}

/* ============================================================
   侧边栏
   ============================================================ */
.sidebar-overlay {
  position: fixed; inset: 0; z-index: 300; background: rgba(15,23,42,.45);
  opacity: 0; pointer-events: none; transition: opacity .28s; backdrop-filter: blur(2px);
}
.sidebar-overlay.open { opacity: 1; pointer-events: auto; }

.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; width: min(var(--sidebar-w), calc(100vw - 24px)); z-index: 350;
  height: 100vh; height: 100dvh;
  background: linear-gradient(180deg, var(--sky2) 0%, #0369a1 100%);
  display: flex; flex-direction: column; overflow: hidden;
  transform: translateX(-100%); transition: transform .3s cubic-bezier(.4,0,.2,1);
  box-shadow: 4px 0 30px rgba(2,132,199,.3);
}
.sidebar.open { transform: translateX(0); }

.sidebar-head { flex: none; min-width: 0; padding: calc(1.2rem + var(--safe-top)) 1rem 0 max(1rem, var(--safe-left)); }
.sidebar-brand { display: flex; align-items: center; gap: .65rem; padding: .5rem 0 1rem; }
.sidebar-brand > div:last-child { min-width: 0; overflow-wrap: anywhere; }
.brand-logo { width: 38px; height: 38px; background: rgba(255,255,255,.18); border-radius: 11px; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; color: #fff; flex-shrink: 0; }
.brand-name { font-size: .95rem; font-weight: 700; color: #fff; font-family: 'Noto Serif SC', serif; }
.brand-version { font-size: .68rem; color: rgba(255,255,255,.5); margin-top: .1rem; }

.sidebar-user { display: flex; align-items: center; gap: .7rem; background: rgba(255,255,255,.1); border-radius: 12px; padding: .7rem .85rem; margin-bottom: .7rem; cursor: pointer; transition: background .2s; }
.sidebar-user:hover { background: rgba(255,255,255,.18); }
.user-avatar { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,.25); color: #fff; font-size: .95rem; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.user-info { flex: 1; min-width: 0; }
.user-name { font-size: .87rem; font-weight: 600; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-class { font-size: .7rem; color: rgba(255,255,255,.52); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.sidebar-nav { flex: 1; min-width: 0; min-height: 0; overflow-x: hidden; overflow-y: auto; overscroll-behavior-y: contain; padding: .7rem 0 .7rem var(--safe-left); }
.nav-group-title { font-size: .66rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: rgba(255,255,255,.4); padding: .8rem 1rem .3rem; }
.nav-item {
  display: flex; align-items: center; gap: .65rem; padding: .62rem 1.1rem;
  color: rgba(255,255,255,.75); font-size: .87rem; text-decoration: none;
  border-radius: 10px; margin: .08rem .55rem; min-width: 0; overflow-wrap: anywhere; cursor: pointer; transition: background-color .16s ease, color .16s ease;
}
.nav-item:hover { background: rgba(255,255,255,.12); color: #fff; }
.nav-item.active { background: rgba(255,255,255,.18); color: #fff; font-weight: 600; }
.nav-item i { width: 16px; text-align: center; flex-shrink: 0; }

.sidebar-foot { flex: none; min-width: 0; padding: .8rem .8rem calc(.8rem + var(--safe-bottom)) max(.8rem, var(--safe-left)); }
.sidebar-foot[hidden] { display: none; }
/* Short viewports (including enlarged text) scroll the whole drawer, keeping
   the account and logout reachable without squeezing the navigation area. */
@media (max-height: 28rem) {
  .sidebar { display: block; overflow-x: hidden; overflow-y: auto; overscroll-behavior-y: contain; }
  .sidebar-nav { overflow: visible; }
}
.sidebar-logout { width: 100%; padding: .6rem; background: rgba(239,68,68,.15); border: 1px solid rgba(239,68,68,.25); border-radius: 10px; color: rgba(255,255,255,.75); font-size: .83rem; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: .5rem; transition: background-color .16s ease, color .16s ease; }
.term-schedule-select {
  width: min(210px, 28vw); min-width: 132px; max-width: 210px;
  padding: 0 1.8rem 0 .72rem;
  text-overflow: ellipsis; white-space: nowrap;
  color: #fff; background-color: rgba(255,255,255,.16);
  border-color: rgba(255,255,255,.2);
  font-size: .78rem; font-weight: 650;
}
.term-schedule-select:hover { background-color: rgba(255,255,255,.24); }
.term-schedule-select:disabled { cursor: wait; opacity: .72; }
@media (max-width: 1099px) { .term-schedule-select { width: min(178px, 35vw); min-width: 118px; max-width: 178px; } }
@media (max-width: 599px) { .term-schedule-select { width: min(136px, 42vw) !important; min-width: 112px; max-width: 136px; padding-left: .5rem; } }
@media (max-width: 380px) { .term-schedule-select { width: 112px !important; min-width: 104px; max-width: 112px; } }
.term-schedule-select:focus-visible { outline: 2px solid rgba(255,255,255,.9); outline-offset: 2px; }
.term-schedule-select option { color: #172033; background: #fff; }
.term-manager-card { border: 1px solid var(--sky-border); background: #fff; border-radius: 12px; padding: .8rem; margin: .65rem 0; }
.term-manager-card.is-current { border-color: var(--accent); box-shadow: 0 3px 12px rgba(2,132,199,.12); }
.term-manager-head { display:flex; align-items:center; justify-content:space-between; gap:.6rem; margin-bottom:.65rem; }
.term-name-suggestion { display:flex; align-items:center; justify-content:space-between; gap:.65rem; margin:-.15rem 0 .75rem; padding:.58rem .7rem; border:1px solid var(--sky-border); border-radius:10px; background:var(--sky-bg); color:var(--text2); font-size:.76rem; line-height:1.5; }
.term-name-suggestion[hidden] { display:none; }
.term-name-suggestion strong { color:var(--sky2); }
.term-name-suggestion button { flex:0 0 auto; border:1px solid var(--sky-border); border-radius:999px; background:#fff; color:var(--sky2); padding:.25rem .6rem; font:inherit; font-weight:650; cursor:pointer; }
.term-manager-actions { display:flex; flex-wrap:wrap; gap:.45rem; margin-top:.15rem; }
.sidebar-logout:hover { background: rgba(239,68,68,.28); color: #fff; }

/* ============================================================
   主区域
   ============================================================ */
.main {
  padding-top: var(--header-h);
  padding-bottom: var(--tab-h);
  min-height: 100vh;
}

/* ============================================================
   课表页头
   ============================================================ */
.header-card {
  background: linear-gradient(135deg, var(--sky2) 0%, var(--sky) 62%, #22d3ee 100%);
  padding: 1.15rem 1rem 1rem; position: relative; overflow: hidden;
  box-shadow: 0 4px 20px rgba(2,132,199,.22);
}
.header-card::before {
  content: ''; position: absolute; top: -30px; right: -30px;
  width: 140px; height: 140px; background: rgba(255,255,255,.07);
  border-radius: 50%; pointer-events: none;
}
.hc-school { font-size: .78rem; color: rgba(255,255,255,.8); font-weight: 400; margin-bottom: .15rem; }
.hc-class { font-size: 1.18rem; font-weight: 700; color: #fff; font-family: 'Noto Serif SC', serif; }
.hc-meta { font-size: .72rem; color: rgba(255,255,255,.62); margin-top: .2rem; }
.hc-actions { display: none; gap: .5rem; margin-top: .55rem; align-items: center; }
.hc-action-btn { padding: .4rem .9rem; background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.3); border-radius: 20px; color: #fff; font-size: .78rem; cursor: pointer; display: flex; align-items: center; gap: .4rem; transition: background .2s; white-space: nowrap; }
.hc-action-btn:hover { background: rgba(255,255,255,.28); }
.hc-action-btn.public-on { background: rgba(16,185,129,.28); border-color: rgba(16,185,129,.5); }

.hc-status { margin-top: .5rem; font-size: .78rem; display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; color: rgba(255,255,255,.9); }
.term-context-action {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 28px; margin-left: .25rem; padding: .2rem .55rem;
  border: 1px solid currentColor; border-radius: 999px;
  background: color-mix(in srgb, currentColor 8%, transparent); color: inherit;
  font: inherit; font-weight: 600; line-height: 1; cursor: pointer;
}
.term-context-action:hover { background: color-mix(in srgb, currentColor 15%, transparent); }
.term-context-action:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.hc-status .term-context-action { background: rgba(255,255,255,.14); }
.hc-status .term-context-action:hover { background: rgba(255,255,255,.24); }
.status-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; color: #94a3b8; background: currentColor; box-shadow: 0 0 7px currentColor; transform-origin: center; }

/* 🔴 正在上课 — 红色闪烁 */
.status-dot.in-class {
  color: #ef4444;
  animation: status-breathe 1.5s ease-in-out infinite;
}

/* 🟡 课间 / 下节课即将开始 — 黄色闪烁 */
.status-dot.break-dot {
  color: #facc15;
  animation: status-breathe 1.5s ease-in-out infinite;
}

/* 🟢 今日课程结束 / 空闲 — 绿色闪烁 */
.status-dot.free-dot {
  color: #22c55e;
}

/* 🔵 睡眠时段 / 明日信息 — 蓝色 */
.status-dot.sleep-dot {
  color: #38bdf8;
}

/* 🟣 放假 — 紫色 */
.status-dot.holiday-dot {
  color: #a855f7;
}

/* ⚪ 离线/加载中 */
.status-dot.offline { color: #94a3b8; box-shadow: none; }

/* 所有状态文字统一白色（位于蓝色渐变header上） */
.hcs-class,
.hcs-break,
.hcs-free,
.hcs-sleep,
.hcs-holiday { color: #ffffff; }
.hcs-countdown { background: rgba(255,255,255,.18); border-radius: 6px; padding: .1rem .45rem; font-size: .7rem; color: #fff; font-variant-numeric: tabular-nums; letter-spacing: .02em; }
#statusCountdownVal { font-family: ui-monospace, 'SF Mono', monospace; font-size: .72rem; }

@keyframes status-breathe { 50% { opacity: .52; transform: scale(.72); } }

/* ============================================================
   周次导航
   ============================================================ */
.week-nav {
  display: flex; align-items: center; gap: .35rem; padding: .55rem .7rem;
  background: var(--card); border-bottom: 1px solid var(--sky-border);
  overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: nowrap;
}
.week-nav-btn {
  width: 34px; height: 34px; flex-shrink: 0; border: 1.5px solid var(--sky-border);
  background: var(--sky-bg); border-radius: 9px; color: var(--sky2); font-size: .85rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease;
}
.week-nav-btn:hover { background: var(--sky-light); border-color: var(--sky3); }
/* 全学期总览模式下，切周次对当前显示内容没有任何影响（反正不按周筛选），
   继续让这几个控件看着能点会造成"点了却什么都没变"的困惑，禁用掉并弱化。 */
.week-nav-btn:disabled, .week-select:disabled {
  opacity: .4; cursor: not-allowed; pointer-events: none;
}
.week-nav-btn:disabled:hover { background: var(--sky-bg); border-color: var(--sky-border); }
.week-select-wrap { flex-shrink: 0; }
.week-select {
  height: 34px; border: 1.5px solid var(--sky-border); border-radius: 9px;
  background: var(--sky-bg); color: var(--sky2); font-size: .82rem; padding: 0 .6rem;
  cursor: pointer; outline: none; font-weight: 600;
}
.week-label { font-size: .78rem; color: var(--muted); display: none; flex-shrink: 0; }
.today-chip {
  flex-shrink: 0; padding: .25rem .65rem; background: linear-gradient(135deg, var(--sky2), var(--sky));
  color: #fff; border: none; border-radius: 20px; font-size: .75rem; font-weight: 600;
  cursor: pointer; transition: opacity .18s; white-space: nowrap;
}
.today-chip:hover { opacity: .85; }
.mode-chip {
  flex-shrink: 0; padding: .25rem .65rem; background: linear-gradient(135deg, #f97316, #fbbf24);
  color: #fff; border: none; border-radius: 20px; font-size: .75rem; font-weight: 600;
  cursor: pointer; transition: opacity .18s; white-space: nowrap;
}
.mode-chip.winter { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.mode-chip.custom { background: linear-gradient(135deg, #8b5cf6, #ec4899); }
.mode-chip:hover { opacity: .85; }

/* 视图切换按钮 — 在周次导航栏内，紧邻模式按钮 */
.view-toggle-chip {
  flex-shrink: 0; padding: .25rem .65rem;
  background: linear-gradient(135deg, #475569, #64748b);
  color: #fff; border: none; border-radius: 20px; font-size: .75rem; font-weight: 600;
  cursor: pointer; transition: opacity .16s ease; white-space: nowrap;
}
.view-toggle-chip:hover { opacity: .85; }
.view-toggle-chip.table-mode { background: linear-gradient(135deg, var(--sky2), var(--sky)); }

/* ============================================================
   统计行
   ============================================================ */
.stats-row { display: flex; gap: .5rem; padding: .6rem .85rem; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.stat-chip { background: var(--card); border: 1.5px solid var(--sky-border); border-radius: 10px; padding: .45rem .75rem; display: flex; align-items: center; gap: .35rem; white-space: nowrap; box-shadow: var(--shadow); }
.stat-chip-val { font-size: 1.1rem; font-weight: 700; color: var(--sky2); }
.stat-chip-lbl { font-size: .7rem; color: var(--muted); }

/* ============================================================
   过滤栏
   ============================================================ */
.filter-bar { padding: .4rem .85rem; display: flex; gap: .4rem; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.filter-tag { padding: .25rem .65rem; background: var(--card); border: 1.5px solid var(--sky-border); border-radius: 20px; font: inherit; font-size: .75rem; line-height: 1.4; color: var(--text2); cursor: pointer; white-space: nowrap; transition: color .18s, background-color .18s, border-color .18s, transform .18s; }
.filter-tag.active { background: var(--sky2); border-color: var(--sky2); color: #fff; }

/* ============================================================
   课程表视图
   
   移动端默认显示列表视图。
   当用户切换到表格视图时（body 上无 list-mode class），
   .schedule-table-wrap 必须能显示。
   
   显示规则：
   - 移动端：默认 list-mode → 列表显示，表格隐藏
   - 移动端：切换后 !list-mode → 表格显示，列表隐藏
   - 桌面端：默认 !list-mode → 表格显示
   ============================================================ */

/* 移动端默认：列表显示，表格隐藏 */
.schedule-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  /* 为底部标签栏和折叠态主按钮保留安全距离。 */
  padding: .6rem .6rem calc(var(--tab-h) + 5rem) .6rem;
  display: none;
}
.list-view {
  display: block;
  /* 和 .schedule-table-wrap 用同一套底部留白：两者共用同一个固定定位的 FAB，
     常驻遮挡面积（tab栏 + 折叠态的 fab-main）完全一样，理应给一样的安全距离。 */
  padding: .5rem .65rem calc(var(--tab-h) + 5rem);
}
.list-view, .schedule-table-wrap { contain: layout paint; }

/* 打开任意一个课程的编辑/复制/删除面板时（js/app.js 的 syncFabVisibilityWithCourseActions），
   FAB 整体淡出且不再拦截点击，点击直接穿透到下方课程操作按钮——
   这样无论 FAB 展开成什么高度，都不会挡住刚打开的操作面板，也不需要为此预留额外空白。 */
body.course-actions-open .fab-group {
  opacity: 0;
  pointer-events: none;
}
.fab-group { transition: opacity .15s ease; }

/* 移动端 list-mode（默认态）：列表 ✓ 表格 ✗ */
body.list-mode .schedule-table-wrap { display: none; }
body.list-mode .list-view { display: block; }

/* 移动端表格视图（非 list-mode） */
body:not(.list-mode) .schedule-table-wrap { display: block; }
body:not(.list-mode) .list-view { display: none; }

.schedule-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 3px;
  min-width: 520px;   /* 移动端允许更小 */
}
.schedule-table th {
  background: linear-gradient(135deg, var(--sky2), var(--sky));
  color: #fff; font-size: .68rem; font-weight: 600; padding: .2rem;
  border-radius: 7px; text-align: center; white-space: nowrap; vertical-align: middle;
  min-width: 46px;
}
.schedule-th-content {
  min-height: 88px; height: 100%; width: 100%; box-sizing: border-box;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: .12rem; line-height: 1.16; overflow: hidden;
}
.schedule-th-day { font-size: .82rem; font-weight: 750; line-height: 1.15; }
.schedule-th-date { font-size: .66rem; font-weight: 650; opacity: .92; line-height: 1.15; }
.schedule-th-lunar { font-size: .6rem; font-weight: 400; opacity: .74; line-height: 1.15; }
.schedule-th-status {
  display: inline-flex; align-items: center; justify-content: center; max-width: 100%;
  padding: .15rem .46rem; border-radius: 999px; font-size: .59rem; font-weight: 650;
  line-height: 1.15; overflow: hidden; text-overflow: ellipsis;
}
.schedule-th-holiday { background: rgba(52,211,153,.2); color: #176b50; }
.schedule-th-term { background: rgba(31,157,120,.12); color: #147a5b; }
.schedule-th-festival { color: var(--orange); opacity: .95; }
.schedule-th-today { font-size: .58rem; font-weight: 700; color: #fff7ed; line-height: 1.15; }
.schedule-table th.today-col { background: linear-gradient(135deg, #ea580c, var(--orange)); box-shadow: 0 2px 10px rgba(249,115,22,.35); }
.schedule-table td {
  background: var(--card); border-radius: 8px; vertical-align: top;
  padding: .3rem; min-height: 52px; cursor: pointer; transition: background .15s;
}
.schedule-table td:hover { background: var(--sky-light); }
.schedule-table td.drop-target { background: rgba(14,165,233,.07); outline: 2px dashed rgba(14,165,233,.35); outline-offset: -2px; }
.schedule-table td.drag-over { background: rgba(14,165,233,.18); outline-color: var(--sky); }
.schedule-table td.droppable-hint { outline: 2px dashed rgba(14,165,233,.2); outline-offset: -2px; }
.time-label-cell { background: var(--sky-bg) !important; cursor: default !important; width: 64px; }
.time-label { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: .18rem .06rem; gap:.04rem; }
.time-label strong { font-size: .67rem; color: var(--text2); font-weight: 600; }
.time-detail { display: flex; flex-direction: column; align-items: center; gap: .04rem; width: 100%; }
.slot-mini { font-size: .52rem; color: var(--muted); display: flex; align-items: center; gap: .12rem; white-space: nowrap; line-height:1.3; }
.slot-mini em { font-style: normal; color: var(--sky2); font-weight: 500; }
.slot-note { font-size: .48rem; color: var(--orange); margin-top: .04rem; }
.slot-note { font-size: .54rem; color: var(--orange); margin-top: .05rem; }
tr.time-type-break td { background: rgba(14,165,233,.03) !important; }

/* 移动端表格：时间列更窄，课程格字体更小 */
@media (max-width: 767px) {
  .schedule-table { min-width: 480px; }
  .time-label-cell { width: 48px; }
  .schedule-table th { font-size: .62rem; padding: .15rem; min-width: 40px; }
  .schedule-th-content { min-height: 82px; gap: .1rem; }
  .schedule-th-day { font-size: .72rem; }
  .schedule-th-date { font-size: .6rem; }
  .schedule-th-lunar, .schedule-th-status { font-size: .56rem; }
  .schedule-table td { padding: .2rem; min-height: 44px; }
  .course-name { font-size: .67rem !important; }
  .course-teacher { font-size: .6rem !important; }
  .course-room, .course-weeks { font-size: .58rem !important; }
}

/* ============================================================
   课程格
   ============================================================ */
.course {
  border-radius: 7px; border-left: 3px solid; padding: .3rem .32rem;
  cursor: pointer; position: relative; transition: transform .15s, box-shadow .15s;
  font-size: .72rem; user-select: none; min-height: 40px;
}
.course:hover { transform: translateY(-1px); box-shadow: 0 3px 12px rgba(0,0,0,.12); }
.course:hover .course-actions { opacity: 1; }
.course-conflict { border-left-color: #ef4444 !important; background: #fef2f2 !important; }
.course-actions {
  position: absolute; top: 2px; right: 2px;
  display: flex; gap: 2px; opacity: 0; transition: opacity .18s;
  background: rgba(255,255,255,.9); border-radius: 6px; padding: 2px;
}
/* 移动端触摸显示操作按钮 */
.course.actions-visible .course-actions { opacity: 1; }
.course-action-btn {
  width: 20px; height: 20px; border: none; background: none;
  border-radius: 4px; cursor: pointer; font-size: .68rem;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); transition: background-color .14s ease, color .14s ease;
}
.course-action-btn:hover { background: var(--sky-light); color: var(--sky2); }
.course.dragging { opacity: .5; transform: scale(.95); }
.course-name { font-size: .73rem; font-weight: 600; color: var(--text); line-height: 1.25; margin-bottom: .15rem; }
.course-teacher { font-size: .63rem; color: var(--text2); }
.course-room { font-size: .62rem; color: var(--muted); margin-top: .1rem; }
.course-weeks { font-size: .6rem; color: var(--muted); margin-top: .1rem; line-height: 1.2; }
.course-notes { font-size: .58rem; color: var(--orange); margin-top: .12rem; line-height: 1.25; word-break: break-word; }

/* ============================================================
   列表视图
   ============================================================ */
.day-section { margin-bottom: .8rem; }
/* 特殊周（考试周/实训周等）提示横幅 */
.special-week-banner {
  display: flex; flex-wrap: wrap; gap: .4rem;
  padding: .5rem .6rem; margin-bottom: .6rem;
}
.special-week-tag {
  display: inline-flex; align-items: center; gap: .3rem;
  font-size: .74rem; font-weight: 600;
  border: 1px solid; border-radius: 20px;
  padding: .25rem .7rem;
  white-space: nowrap;
}
.list-view .special-week-banner { padding: .6rem .85rem 0; margin-bottom: 0; }

.day-header {
  display: flex; align-items: center; padding: .55rem .85rem;
  background: var(--card); border-radius: 11px 11px 0 0;
  border-bottom: 2px solid var(--sky-border);
  box-shadow: var(--shadow);
}
.day-header.today { border-bottom-color: var(--sky2); background: linear-gradient(135deg, #eff6ff, #e0f2fe); }
.day-header.holiday { background: linear-gradient(135deg, #effcf6, #dcf7e9); border-bottom-color: #46a97d; }
/* 今天恰好也是假期时，用橙色内描边保留“今天”的可辨识度，而不是让假期底色把它完全盖掉 */
.day-header.today.holiday { box-shadow: inset 0 0 0 2px var(--orange); }
.day-name { font-size: .88rem; font-weight: 700; color: var(--text); }
.day-date { font-size: .75rem; color: var(--muted); }
.day-tag { padding: .2rem .55rem; border-radius: 10px; font-size: .68rem; font-weight: 600; background: var(--sky-bg); color: var(--sky2); }
.day-tag.today-tag { background: var(--sky2); color: #fff; }
.day-tag.holiday-tag { background: #46a97d; color: #fff; }

.course-card {
  display: flex; align-items: center; padding: .6rem .85rem;
  background: var(--card); border-bottom: 1px solid var(--sky-border);
  gap: .7rem; transition: background .15s; cursor: pointer;
}
.course-card:last-child { border-radius: 0 0 11px 11px; border-bottom: none; box-shadow: var(--shadow); }
.course-card:hover { background: var(--sky-bg); }
.course-card-color { width: 4px; height: 42px; border-radius: 3px; flex-shrink: 0; }
.course-card-body { flex: 1; min-width: 0; }
.cc-name { font-size: .88rem; font-weight: 600; color: var(--text); }
.cc-info { display: flex; flex-wrap: wrap; gap: .3rem .65rem; margin-top: .2rem; font-size: .73rem; color: var(--muted); }
.cc-info span { display: flex; align-items: center; gap: .25rem; }
.cc-info i { font-size: .65rem; }
.cc-weeks {
  align-items: center !important; max-width: 100%; min-width: 0;
  padding: .08rem .38rem; border: 1px solid var(--sky-border); border-radius: 5px;
  background: var(--sky-bg); color: var(--muted); line-height: 1.35;
}
.cc-weeks > i {
  display: inline-flex; align-items: center; justify-content: center;
  flex: 0 0 auto; width: .9em; height: 1.25em; margin: 0;
  color: var(--sky2); line-height: 1;
}
.cc-weeks .cc-weeks-text {
  display: inline !important; min-width: 0; line-height: 1.25;
  overflow-wrap: anywhere; word-break: break-word;
}
/* 桌面端: opacity 控制显隐，鼠标移入发现，移出消失 */
.course-card-actions {
  display: flex; align-items: center; gap: .4rem; flex-shrink: 0;
  opacity: 0; transition: opacity .15s;
  pointer-events: none;
}
.course-card:hover .course-card-actions {
  opacity: 1;
  pointer-events: auto;
}
/* 移动端触摸: 点击卡片弹出操作按钮 */
@media (max-width: 767px) {
  .course-card-actions {
    opacity: 0;
    display: none;
    pointer-events: none;
  }
  .course-card.actions-visible .course-card-actions {
    display: flex;
    opacity: 1;
    pointer-events: auto;
  }
}
.cc-time-badge {
  font-size: .72rem; color: var(--sky2); font-weight: 700; white-space: nowrap;
  background: var(--sky-bg); border: 1px solid var(--sky-border);
  border-radius: 5px; padding: .08rem .4rem;
}
.cc-action {
  width: 28px; height: 28px; border: none; background: var(--sky-bg);
  border-radius: 7px; cursor: pointer; font-size: .72rem; color: var(--muted);
  display: flex; align-items: center; justify-content: center; transition: background-color .14s ease, color .14s ease;
}
.cc-action.edit:hover { background: var(--sky-light); color: var(--sky2); }
.cc-action.del:hover { background: #fef2f2; color: var(--red); }
.cc-action.copy:hover { background: #f0fdf4; color: var(--green); }

.no-course-tip {
  padding: 1.1rem .85rem; background: var(--card); color: var(--muted);
  font-size: .8rem; text-align: center; border-radius: 0 0 11px 11px;
  box-shadow: var(--shadow);
}

/* ============================================================
   示例横幅
   ============================================================ */
.example-banner {
  display: flex; align-items: flex-start; gap: .7rem;
  padding: .8rem 1rem; background: linear-gradient(135deg, #eff6ff, #e0f2fe);
  border: 1.5px solid var(--sky-border); border-radius: 12px;
  margin: .5rem .65rem; animation: slideDown .2s cubic-bezier(.23,1,.32,1);
  overflow: hidden; box-sizing: border-box;
}
@keyframes slideDown { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
.banner-icon { font-size: 1.4em; flex-shrink: 0; line-height: 1.5; }
.banner-body { flex: 1; min-width: 0; overflow: hidden; }
.banner-title { font-size: .87rem; font-weight: 700; color: var(--sky2); margin-bottom: .25rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.banner-text { font-size: .78rem; color: var(--text2); line-height: 1.55; word-break: break-word; white-space: normal; overflow-wrap: break-word; }
.banner-actions { display: flex; gap: .5rem; margin-top: .55rem; flex-wrap: wrap; }
.banner-btn { padding: .35rem .85rem; border-radius: 20px; font-size: .78rem; font-weight: 600; cursor: pointer; border: none; transition: background-color .16s ease, color .16s ease, opacity .16s ease; }
.banner-btn-primary { background: var(--sky2); color: #fff; }
.banner-btn-primary:hover { background: var(--sky); }
.banner-btn-ghost { background: rgba(2,132,199,.1); color: var(--sky2); }
.banner-btn-ghost:hover { background: rgba(2,132,199,.18); }

.empty-schedule-guide {
  display: flex; align-items: flex-start; gap: .75rem;
  margin: .5rem .65rem; padding: .8rem .9rem;
  border: 1px solid var(--sky-border); border-radius: 12px;
  background: linear-gradient(135deg, #eff6ff, #f0fdf4);
  color: var(--text); box-sizing: border-box;
  animation: slideDown .18s cubic-bezier(.23,1,.32,1);
}
.empty-schedule-guide[hidden] { display: none !important; }
.empty-guide-icon { font-size: 1.35rem; line-height: 1.4; flex: 0 0 auto; }
.empty-guide-body { flex: 1; min-width: 0; }
.empty-guide-title { color: var(--text); font-size: .88rem; font-weight: 700; line-height: 1.4; }
.empty-guide-text { color: var(--text2); font-size: .78rem; line-height: 1.55; margin-top: .15rem; overflow-wrap: anywhere; }
.empty-guide-actions { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .55rem; }
.empty-guide-close {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; padding: 0; flex: 0 0 auto;
  border: 0; border-radius: 9px; background: transparent;
  color: var(--muted); cursor: pointer;
}
.empty-guide-close:hover { background: rgba(2,132,199,.1); color: var(--sky2); }
.empty-guide-close:focus-visible { outline: 2px solid var(--sky2); outline-offset: 2px; }

@media (max-width: 520px) {
  .empty-schedule-guide { margin: .45rem .5rem; padding: .75rem; }
  .empty-guide-actions .banner-btn { min-height: 38px; padding: .4rem .75rem; }
}

.public-source-heading {
  display: flex; align-items: center; gap: .4rem;
  margin: .8rem 0 .45rem; padding: .25rem .15rem;
  color: var(--text2); font-size: .8rem; font-weight: 700;
}
.public-source-heading:first-child { margin-top: 0; }
.public-source-heading span {
  margin-left: auto; color: var(--muted); font-size: .72rem; font-weight: 500;
}
.public-source-empty {
  display: flex; flex-direction: column; align-items: center; gap: .45rem;
  padding: 2rem 1rem; border: 1px dashed var(--sky-border); border-radius: 12px;
  background: var(--sky-bg); color: var(--muted); text-align: center; font-size: .8rem;
}
.public-source-empty strong { color: var(--text); font-size: .88rem; }
.public-source-empty span { max-width: 34rem; line-height: 1.55; }
.public-source-empty-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border-radius: 13px;
  background: rgba(14,165,233,.12); color: var(--sky2); font-size: 1.05rem;
}
.public-source-empty.error .public-source-empty-icon { background: #fef2f2; color: var(--red); }

/* ============================================================
   Tab 栏
   ============================================================ */
.tab-bar {
  position: fixed; bottom: 0; left: 0; right: 0; height: var(--tab-h);
  background: rgba(255,255,255,.95); backdrop-filter: blur(12px);
  border-top: 1px solid var(--sky-border);
  display: flex; align-items: stretch; z-index: 200;
  padding: 0 var(--safe-right) var(--safe-bottom) var(--safe-left);
  box-shadow: 0 -4px 20px rgba(14,165,233,.1);
}
.tab-item {
  flex: 1; border: none; background: none; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: .2rem; cursor: pointer;
  color: var(--muted); font-size: .62rem; font-weight: 500; transition: color .18s;
  padding: .4rem 0;
}
.tab-item i { font-size: 1.1rem; transition: transform .18s; }
.tab-item.active { color: var(--sky2); }
.tab-item.active i { transform: translateY(-2px); }
.tab-bar-fab-space { width: 58px; flex-shrink: 0; }

/* ============================================================
   FAB
   ============================================================ */
.fab-group {
  position: fixed; bottom: calc(var(--tab-h) + .8rem); right: 1rem; z-index: 190;
  display: flex; flex-direction: column; align-items: flex-end; gap: .5rem;
  pointer-events: none; /* 容器本身不拦截点击，只有真正可见的按钮才响应 */
}
.fab {
  width: 52px; height: 52px; border: none; border-radius: 50%; cursor: pointer;
  display: flex; align-items: center; justify-content: center; font-size: 1.2rem;
  box-shadow: 0 4px 18px rgba(0,0,0,.2); transition: transform .2s cubic-bezier(.23,1,.32,1), box-shadow .2s ease, opacity .16s ease; color: #fff;
  pointer-events: auto; /* 按钮自身始终可点（fab-main 常驻显示） */
}
.fab-main { background: linear-gradient(135deg, var(--sky2), var(--sky)); }
.fab-main:hover { transform: scale(1.06); }
.fab-mini {
  width: 44px; height: 44px; font-size: 1rem;
  background: linear-gradient(135deg, #6366f1, #818cf8);
  opacity: 0; pointer-events: none; transform: translateY(8px);
  transition: transform .18s cubic-bezier(.23,1,.32,1), opacity .16s ease;
}
.fab-mini.settings-fab { background: linear-gradient(135deg, #377fa8, #64b5dc); }
.fab-mini.export-fab { background: linear-gradient(135deg, #10b981, #34d399); }
.fab-group.expanded .fab-mini { opacity: 1; pointer-events: auto; transform: translateY(0); }
.fab-group.expanded .fab-main { transform: rotate(45deg); }
/* 收起时隐藏的动作按钮不再占据固定层高度；展开时恢复纵向菜单。 */
.fab-group:not(.expanded) .fab-mini { position: absolute; right: 0; bottom: 0; }

/* ============================================================
   Modal / Sheet
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0; z-index: 500; background: rgba(15,23,42,.45);
  display: flex; align-items: flex-end; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .2s; overscroll-behavior: contain; touch-action: none;
}
.modal-overlay > * { touch-action: auto; }
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal-overlay.open .modal-sheet { transform: translateY(0); }

.modal-sheet {
  width: 100%; max-width: 600px; background: var(--card);
  border-radius: 20px 20px 0 0; transform: translateY(100%);
  transition: transform .3s cubic-bezier(.4,0,.2,1);
  max-height: min(92vh, calc(100dvh - var(--safe-top))); overflow: hidden;
  display: flex; flex-direction: column;
}
.modal-sheet.center { align-items: stretch; }
.sheet-handle { width: 38px; height: 4px; background: var(--sky-border); border-radius: 3px; margin: .7rem auto .3rem; flex-shrink: 0; }
.sheet-head { display: flex; align-items: center; justify-content: space-between; padding: .4rem 1.1rem .6rem; border-bottom: 1px solid var(--sky-border); flex-shrink: 0; }
.sheet-title { font-size: 1rem; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: .5rem; }
.sheet-close { width: 30px; height: 30px; border: none; background: var(--sky-bg); border-radius: 8px; cursor: pointer; color: var(--muted); font-size: .9rem; display: flex; align-items: center; justify-content: center; transition: background-color .16s ease, color .16s ease; }
.sheet-close:hover { background: var(--sky-light); color: var(--sky2); }
.sheet-body { padding: .9rem 1.1rem; flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; }
.sheet-foot { display: flex; gap: .6rem; padding: .8rem 1.1rem; border-top: 1px solid var(--sky-border); background: var(--card); flex-shrink: 0; }
.course-sheet-foot { box-shadow: 0 -8px 18px rgba(14,165,233,.06); }

/* ============================================================
   表单
   ============================================================ */
.form-group { margin-bottom: .85rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: .65rem; }
.form-label { font-size: .78rem; font-weight: 600; color: var(--text2); margin-bottom: .3rem; }
.export-image-options { display:grid; grid-template-columns:minmax(7rem,.7fr) minmax(0,1.3fr); align-items:center; gap:.65rem; margin-top:.7rem; padding:.65rem .75rem; border:1px solid var(--sky-border); border-radius:11px; background:var(--sky-bg); }
.export-image-options .form-label { margin:0; }
.form-control {
  width: 100%; padding: .55rem .75rem; border: 1.5px solid var(--sky-border);
  border-radius: 10px; background: var(--sky-bg); color: var(--text); font-size: .87rem;
  outline: none; transition: border-color .18s, box-shadow .18s; font-family: inherit;
}
.form-control:focus { border-color: var(--sky); box-shadow: 0 0 0 3px rgba(14,165,233,.12); background: #fff; }
.form-control[type="color"] { height: 40px; padding: .25rem; cursor: pointer; }
.form-hint { font-size: .72rem; color: var(--muted); margin-top: .3rem; }

/* ============================================================
   输入联想下拉
   ============================================================ */
.ac-dropdown {
  background: #fff;
  border: 1.5px solid var(--sky-border);
  border-radius: 11px;
  box-shadow: 0 8px 28px rgba(14,165,233,.18);
  overflow: hidden;
  max-height: 220px;
  overflow-y: auto;
  animation: acFadeIn .15s ease;
}
@keyframes acFadeIn { from{opacity:0;transform:translateY(-4px)} to{opacity:1;transform:translateY(0)} }
.ac-option {
  padding: .6rem .85rem;
  font-size: .87rem;
  color: var(--text);
  cursor: pointer;
  border-bottom: 1px solid var(--sky-bg);
  transition: background .12s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ac-option:last-child { border-bottom: none; }
.ac-option:hover,
.ac-option.active { background: var(--sky-light); color: var(--sky2); }
.ac-option mark {
  background: #fef08a;
  color: #713f12;
  border-radius: 3px;
  padding: 0 1px;
  font-style: normal;
}


/* 校验错误框 */
.validation-err-box {
  background: #fef2f2; border: 1.5px solid rgba(239,68,68,.3); border-radius: 10px;
  padding: .6rem .85rem; margin-bottom: .7rem;
  animation: shakeErr .4s cubic-bezier(.36,.07,.19,.97);
  display: flex; align-items: flex-start; gap: .5rem;
}
@keyframes shakeErr {
  0%,100% { transform: translateX(0); }
  20%,60% { transform: translateX(-5px); }
  40%,80% { transform: translateX(5px); }
}
.veb-icon { font-size: 1.1em; flex-shrink: 0; }
.veb-list { list-style: none; margin: 0; padding: 0; }
.veb-list li { font-size: .8rem; color: #dc2626; line-height: 1.6; }

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .55rem 1.1rem; border-radius: 11px; font-size: .87rem; font-weight: 600;
  cursor: pointer; border: none; transition: transform .16s cubic-bezier(.23,1,.32,1), opacity .16s ease, background-color .16s ease, border-color .16s ease, color .16s ease; white-space: nowrap;
  font-family: inherit;
}
.btn-primary { background: linear-gradient(135deg, var(--sky2), var(--sky)); color: #fff; }
.btn-primary:hover { opacity: .88; transform: translateY(-1px); }
.btn-ghost { background: var(--sky-bg); border: 1.5px solid var(--sky-border); color: var(--text2); }
.btn-ghost:hover { background: var(--sky-light); color: var(--sky2); }
.btn-danger { background: linear-gradient(135deg, #dc2626, #ef4444); color: #fff; }
.btn-danger:hover { opacity: .88; }
.btn-warning { background: linear-gradient(135deg, #c98219, #e5a83b); color: #fff; }
.btn-warning:hover { opacity: .88; }
.btn-local-clear { background: #fff7f7; border: 1.5px solid #fecaca; color: #b91c1c; }
.btn-local-clear:hover { background: #fee2e2; border-color: #fca5a5; color: #991b1b; }
.btn-full { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; pointer-events: none; }

/* ============================================================
   设置页
   ============================================================ */
.settings-tabs {
  display: flex; gap: .3rem; overflow-x: auto; padding: .6rem 1.2rem;
  border-bottom: 1px solid var(--sky-border); -webkit-overflow-scrolling: touch;
}
.stab {
  flex-shrink: 0; padding: .45rem .85rem; border: 1.5px solid var(--sky-border);
  border-radius: 20px; background: var(--card); color: var(--muted); font-size: .78rem;
  font-weight: 600; cursor: pointer; transition: background-color .16s ease, border-color .16s ease, color .16s ease; white-space: nowrap;
}
.stab.active { background: var(--sky2); border-color: var(--sky2); color: #fff; }
.stab:hover:not(.active) { background: var(--sky-light); color: var(--sky2); }

.settings-panel { display: none; padding: .9rem .9rem 2rem; }
.settings-panel.active { display: block; }

/* Settings are a workspace, not an edge-to-edge registration form. */
.settings-page-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 1.2rem .6rem}
.settings-page-head h2{margin:0;font-size:1.2rem;line-height:1.4;color:var(--text)}
.settings-page-head p{margin:.25rem 0 0;color:var(--muted);font-size:.85rem;line-height:1.5}
.settings-guide-entry{flex-shrink:0;min-height:44px;font-size:.85rem}
.settings-guide-entry[hidden]{display:none}
.settings-panel{max-width:76rem;margin-inline:auto}
#class-info-panel,#ai-panel,#danger-panel{max-width:58rem;margin-inline:0}
.settings-panel :where(.form-hint,.public-source-note,.class-info-card){overflow-wrap:anywhere}
.settings-tabs .stab{min-height:44px;font-size:.85rem}
/* The horizontal margins belong inside the available width, not beyond it. */
button.nav-item{width:calc(100% - 1.1rem);border:0;text-align:left;font-family:inherit;background:transparent}
.nav-item:focus-visible,.stab:focus-visible{outline:3px solid var(--sky2);outline-offset:2px}
@media(max-width:600px){
 .settings-page-head{padding:.8rem .9rem;gap:.6rem;align-items:flex-start}
 .settings-page-head p{max-width:28ch}
 .settings-guide-entry{white-space:normal;max-width:8.5rem}
 .settings-panel .form-control{font-size:max(1rem,16px)}
 .settings-panel .form-row{flex-wrap:wrap}
 .settings-panel .form-row>.form-group{flex:1 1 12rem;min-width:0}
}

.class-info-card {
  background: var(--card); border: 1.5px solid var(--sky-border); border-radius: 14px;
  padding: .9rem; position: relative; overflow: hidden; margin-bottom: .8rem;
  box-shadow: var(--shadow);
}
.class-info-card h4 { font-size: .87rem; font-weight: 700; color: var(--text); margin-bottom: .7rem; display: flex; align-items: center; gap: .4rem; }
.class-info-card h4 i { color: var(--sky2); }

/* 公开课表 */
.public-source-toolbar {
  display: flex; align-items: center; justify-content: space-between; gap: .7rem;
  margin-bottom: .8rem; padding: .55rem .7rem;
  color: var(--muted); background: var(--sky-bg); border: 1px solid var(--sky-border);
  border-radius: 10px;
}
.public-source-note { min-width: 0; font-size: .78rem; line-height: 1.45; }
.public-source-note i { color: var(--sky2); margin-right: .25rem; }
.public-source-refresh {
  flex: 0 0 auto; min-height: 34px; padding: .25rem .65rem;
  font-size: .75rem; justify-content: center;
}
.pub-sched-card {
  display: flex; align-items: center; gap: .7rem; padding: .7rem .85rem;
  background: var(--card); border: 1.5px solid var(--sky-border); border-radius: 12px;
  margin-bottom: .5rem; cursor: pointer; transition: background-color .16s ease, border-color .16s ease;
}
.pub-sched-card:hover { border-color: var(--sky3); background: var(--sky-bg); }
.pub-sched-card.selected { border-color: var(--sky2); background: var(--sky-light); }
.pub-sched-icon { font-size: 1.4em; flex-shrink: 0; }
.pub-sched-body { flex: 1; min-width: 0; }
.pub-sched-name { font-size: .87rem; font-weight: 700; color: var(--text); }
.pub-sched-info { font-size: .73rem; color: var(--muted); margin-top: .2rem; line-height: 1.4; }
.pub-sched-check { color: var(--sky-border); font-size: 1rem; flex-shrink: 0; transition: color .18s; }
.pub-sched-card.selected .pub-sched-check { color: var(--sky2); }

@media (max-width: 520px) {
  .public-source-toolbar { align-items: stretch; gap: .55rem; }
  .public-source-note { flex: 1; }
  .public-source-refresh { min-width: 64px; align-self: center; }
}

/* 时间段 */
.ts-scheme-bar { display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; margin-bottom: .5rem; padding: .5rem; background: var(--sky-bg); border-radius: 10px; }
.ts-scheme-label { font-size: .75rem; color: var(--muted); font-weight: 600; }
.ts-scheme-tabs { display: flex; gap: .25rem; flex-wrap: wrap; min-width: 0; max-width: 100%; }
.ts-active-scheme {
  display: inline-flex; align-items: center; gap: .35rem; max-width: 100%;
  padding: .38rem .62rem; border: 1px solid rgba(14,165,233,.22); border-radius: 999px;
  color: var(--sky2); background: rgba(14,165,233,.08); font-size: .72rem; font-weight: 700;
  line-height: 1.35; white-space: normal;
}
.ts-active-scheme i { flex: 0 0 auto; font-size: .68rem; }
.ts-scheme-tab { padding: .3rem .65rem; border: 1.5px solid var(--sky-border); border-radius: 20px; background: var(--card); font-size: .75rem; font-weight: 600; cursor: pointer; transition: background-color .14s ease, border-color .14s ease, color .14s ease; max-width: 100%; white-space: normal; overflow-wrap: anywhere; }
.ts-scheme-tab.active { background: var(--sky2); border-color: var(--sky2); color: #fff; }
.ts-add-scheme-btn { padding: .3rem .65rem; border: 1.5px dashed var(--sky-border); border-radius: 20px; background: none; font-size: .75rem; color: var(--sky2); cursor: pointer; display: flex; align-items: center; gap: .3rem; }
.ts-text-action { display: inline-flex; align-items: center; justify-content: center; gap: .3rem; min-height: 2.75rem; min-width: 0; padding: .4rem .6rem; border: 1px solid var(--sky-border); border-radius: 8px; background: var(--card2); color: var(--text); font-size: .75rem; font-weight: 600; line-height: 1.3; cursor: pointer; white-space: normal; text-align: center; }
.ts-text-action i { flex: 0 0 auto; }
.ts-text-action.del, .ts-del-scheme-btn { color: var(--red); }
.ts-text-action:disabled { opacity: .45; cursor: default; }
.ts-text-action:focus-visible { outline: 2px solid var(--sky2); outline-offset: 2px; }
.ts-scheme-info { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: .4rem; font-size: .73rem; color: var(--muted); padding: .2rem .5rem .4rem; overflow-wrap: anywhere; }
.ts-scheme-tools { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; min-width: 0; max-width: 100%; }
.timeslot-row { min-width: 0; background: var(--card); border: 1.5px solid var(--sky-border); border-radius: 12px; padding: .7rem; margin-bottom: .5rem; }
.timeslot-row-head { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr)); align-items: start; gap: .5rem; margin-bottom: .5rem; }
.ts-row-summary { display: flex; align-items: flex-start; gap: .5rem; min-width: 0; }
.ts-row-title { display: flex; align-items: center; flex-wrap: wrap; gap: .35rem; flex: 1; min-width: 0; font-size: .83rem; overflow-wrap: anywhere; }
.ts-row-actions { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: .35rem; min-width: 0; }
.ts-row-num { width: 20px; height: 20px; background: var(--sky2); color: #fff; border-radius: 5px; font-size: .7rem; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.ts-type-badge { font-size: .65rem; padding: .1rem .4rem; border-radius: 8px; margin-left: .3rem; font-weight: 600; }
.ts-type-class { background: #e0f2fe; color: var(--sky2); }
.ts-type-break { background: #fef9c3; color: #854d0e; }
.ts-type-self-study { background: #f0fdf4; color: var(--green2); }
.ts-mini-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); gap: .45rem; }
.ts-field { display: flex; flex-direction: column; min-width: 0; gap: .15rem; }
.ts-field > .form-control { width: 100%; min-width: 0; max-width: 100%; box-sizing: border-box; }
.ts-rule-row { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; padding: .3rem .5rem; background: var(--card2); border-radius: 6px; margin-bottom: .3rem; font-size: .78rem; }
.ts-rule-summary { flex: 1 1 12rem; min-width: 0; overflow-wrap: anywhere; }
.ts-rule-fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr)); gap: .4rem; margin-top: .5rem; }
.ts-rule-add { align-self: end; min-height: 2.75rem; }
.ts-fill-action { display: flex; align-items: flex-end; min-width: 0; }

/* 考试高亮属于具体课程，不应用到整个时间段。 */
.exam-slot-tag { display: inline-flex; align-items: center; gap: .2rem; font-size: .6rem; font-weight: 700; padding: .05rem .4rem; border-radius: 8px; background: var(--purple); color: #fff; margin-left: .3rem; }
.course-card.course-card-exam { border-left: 3px solid var(--purple); background: linear-gradient(90deg, rgba(139,92,246,.06), transparent 60%); }
.course.course-exam { border-color: var(--purple) !important; background: linear-gradient(135deg, rgba(139,92,246,.25), rgba(139,92,246,.1)) !important; box-shadow: 0 0 0 1px rgba(139,92,246,.35) inset; }

/* 实体 */
.entity-item { display: flex; align-items: center; justify-content: space-between; padding: .5rem .7rem; background: var(--sky-bg); border: 1.5px solid var(--sky-border); border-radius: 10px; margin-bottom: .4rem; }
.entity-item-del { width: 28px; height: 28px; border: none; background: none; color: var(--red); cursor: pointer; border-radius: 7px; display: flex; align-items: center; justify-content: center; font-size: .8rem; transition: background .15s; }
.entity-item-del:hover { background: #fef2f2; }

/* 校历 */
.calendar-empty { text-align: center; padding: 2rem; color: var(--muted); font-size: .83rem; }
.ce-icon { font-size: 2em; margin-bottom: .5rem; }

/* 同步偏好 */
.sync-pref-card { background: var(--sky-bg); border: 1.5px solid var(--sky-border); border-radius: 12px; padding: .75rem; }
.sync-pref-title { font-size: .82rem; font-weight: 700; color: var(--text); margin-bottom: .55rem; display: flex; align-items: center; gap: .4rem; }
.sync-pref-opts { display: flex; gap: .8rem; flex-wrap: wrap; margin-bottom: .4rem; }
.sync-radio { display: flex; align-items: center; gap: .35rem; font-size: .8rem; color: var(--text2); cursor: pointer; }
.sync-pref-note { font-size: .73rem; color: var(--muted); }
.sync-consistency-note { margin-top: .22rem; }
.sync-pref-save { margin-top: .65rem; }
#syncConsistencyLabel { font-weight: 700; }
#syncConsistencyLabel[data-status="verified"] { color: var(--success, #16825d); }
#syncConsistencyLabel[data-status="pending"] { color: var(--warning, #aa6a07); }
#syncConsistencyLabel[data-status="offline"] { color: var(--danger, #be3a42); }
#syncConsistencyLabel[data-status="restored"] { color: var(--primary, #2779c9); }

/* ============================================================
   看板
   ============================================================ */
.dash-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; }
.dash-card { background: var(--card); border: 1.5px solid var(--sky-border); border-radius: 14px; padding: .85rem; box-shadow: var(--shadow); transition: transform .18s; }
.dash-card:hover { transform: translateY(-2px); }
.dash-card.full-w { grid-column: 1 / -1; }
.dc-label { font-size: .72rem; color: var(--muted); margin-bottom: .35rem; font-weight: 600; }
.dc-time { font-size: 2.2rem; font-weight: 800; color: var(--text); font-variant-numeric: tabular-nums; line-height: 1; }
.dc-val { font-size: 1.8rem; font-weight: 800; color: var(--sky2); line-height: 1; }
.dc-val.small { font-size: 1.1rem; }
.dc-sub { font-size: .72rem; color: var(--muted); margin-top: .3rem; }
.locale-btn { padding: .2rem .6rem; border: 1.5px solid var(--sky-border); background: var(--sky-bg); border-radius: 8px; font-size: .72rem; color: var(--sky2); cursor: pointer; transition: background-color .14s ease, border-color .14s ease, color .14s ease; }
.locale-btn:hover { background: var(--sky-light); }

/* ============================================================
   Toast
   ============================================================ */
.toast {
  position: fixed; bottom: calc(var(--tab-h) + .8rem); left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: #fff; padding: .6rem 1.2rem; border-radius: 20px;
  font-size: .83rem; font-weight: 500; z-index: 9999; opacity: 0;
  transition: opacity .2s cubic-bezier(.23,1,.32,1), transform .2s cubic-bezier(.23,1,.32,1); pointer-events: none; max-width: min(88vw, 360px); text-align: center;
  box-shadow: 0 4px 20px rgba(0,0,0,.25); white-space: normal; word-break: break-word;
  line-height: 1.5;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { background: linear-gradient(135deg, #059669, #10b981); }
.toast.error { background: linear-gradient(135deg, #dc2626, #ef4444); }
.toast.warn, .toast.warning { background: linear-gradient(135deg, #d97706, #f59e0b); }
.toast.info { background: linear-gradient(135deg, var(--sky2), var(--sky)); }

/* ============================================================
   推荐课表弹窗
   ============================================================ */
.recommend-modal {
  position: fixed; inset: 0; z-index: 600; background: rgba(15,23,42,.55);
  display: flex; align-items: center; justify-content: center; padding: 1rem;
  opacity: 0; pointer-events: none; transition: opacity .25s; backdrop-filter: blur(3px);
}
.recommend-modal.active { opacity: 1; pointer-events: auto; }
  .recommend-box {
  background: var(--card); border-radius: 20px; width: 100%; max-width: 440px;
  max-height: 88vh; overflow: hidden; display: flex; flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
  animation: slideUp .3s cubic-bezier(.4,0,.2,1);
}
.recommend-header { padding: 1.3rem 1.2rem .8rem; border-bottom: 1px solid var(--sky-border); text-align: center; }
.recommend-icon { font-size: 2.2rem; margin-bottom: .4rem; }
.recommend-title { font-size: 1.05rem; font-weight: 700; color: var(--text); font-family: 'Noto Serif SC', serif; }
.recommend-subtitle { font-size: .78rem; color: var(--muted); margin-top: .3rem; }
.recommend-body { flex: 1; overflow-y: auto; padding: 1rem 1.1rem; }
.recommend-footer { padding: .8rem 1.1rem; border-top: 1px solid var(--sky-border); display: flex; gap: .65rem; }
.recommend-card-list { display: flex; flex-direction: column; gap: .5rem; }
.recommend-card { display: flex; align-items: center; gap: .7rem; padding: .7rem .85rem; border: 1.5px solid var(--sky-border); border-radius: 12px; cursor: pointer; transition: background-color .16s ease, border-color .16s ease; }
.recommend-card:hover { border-color: var(--sky3); background: var(--sky-bg); }
.recommend-card.selected { border-color: var(--sky2); background: var(--sky-light); }
.recommend-card.builtin-card { border-color: #c4b5fd; }
.recommend-card.builtin-card.selected { background: #f5f3ff; border-color: var(--purple); }
.recommend-card-avatar { font-size: 1.4em; flex-shrink: 0; width: 36px; text-align: center; }
.recommend-card-info { flex: 1; min-width: 0; }
.recommend-card-name { font-size: .87rem; font-weight: 700; color: var(--text); }
.recommend-card-meta { font-size: .72rem; color: var(--muted); margin-top: .2rem; }
.recommend-card-check { color: var(--sky-border); font-size: 1rem; flex-shrink: 0; transition: color .18s; }
.recommend-card.selected .recommend-card-check { color: var(--sky2); }

/* ============================================================
   用户资料弹窗
   ============================================================ */
.profile-modal {
  position: fixed; inset: 0; z-index: 600; background: rgba(15,23,42,.55);
  display: flex; align-items: center; justify-content: center; padding: 1rem;
  opacity: 0; pointer-events: none; transition: opacity .25s; backdrop-filter: blur(3px);
}
.profile-modal.active { opacity: 1; pointer-events: auto; }
.profile-box {
  background: var(--card); border-radius: 20px; width: 100%; max-width: 360px;
  box-shadow: 0 20px 60px rgba(0,0,0,.25); overflow: hidden;
  animation: slideUp .3s cubic-bezier(.4,0,.2,1);
}
.profile-top { background: linear-gradient(135deg, var(--sky2), var(--sky)); padding: 1.4rem 1.2rem 1rem; display: flex; align-items: center; gap: .85rem; position: relative; }
.profile-avatar-lg { width: 52px; height: 52px; border-radius: 50%; background: rgba(255,255,255,.25); color: #fff; font-size: 1.4rem; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.profile-info { flex: 1; min-width: 0; }
.profile-name { font-size: 1.05rem; font-weight: 700; color: #fff; font-family: 'Noto Serif SC', serif; }
.profile-role { font-size: .75rem; color: rgba(255,255,255,.75); margin-top: .2rem; }
.profile-close { position: absolute; top: .9rem; right: .9rem; width: 28px; height: 28px; border: none; background: rgba(255,255,255,.18); border-radius: 8px; color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.profile-body { padding: 1rem 1.1rem 1.2rem; }
.profile-row { display: flex; align-items: flex-start; justify-content: space-between; padding: .45rem 0; border-bottom: 1px solid var(--sky-border); gap: .5rem; }
.profile-row:last-of-type { border-bottom: none; }
.profile-row-label { font-size: .78rem; color: var(--muted); flex-shrink: 0; min-width: 60px; }
.profile-row-value { font-size: .83rem; color: var(--text); font-weight: 500; text-align: right; }

/* ============================================================
   冲突 / 移动弹窗
   ============================================================ */
.conflict-modal {
  position: fixed; inset: 0; z-index: 700; background: rgba(15,23,42,.55);
  display: flex; align-items: center; justify-content: center; padding: 1rem;
  opacity: 0; pointer-events: none; transition: opacity .25s; backdrop-filter: blur(3px);
}
.conflict-modal.active { opacity: 1; pointer-events: auto; }
.conflict-box {
  background: var(--card); border-radius: 20px; width: 100%; max-width: 380px;
  padding: 1.3rem 1.2rem; box-shadow: 0 20px 60px rgba(0,0,0,.25);
  animation: slideUp .3s cubic-bezier(.4,0,.2,1);
}
.conflict-box h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: .5rem; font-family: 'Noto Serif SC', serif; }
.conflict-box p { font-size: .83rem; color: var(--text2); margin-bottom: 1rem; line-height: 1.5; }
.conflict-btns { display: flex; flex-direction: column; gap: .5rem; }

/* ============================================================
   同步气泡
   ============================================================ */
.sync-prompt-bubble {
  position: fixed; bottom: calc(var(--tab-h) + 1rem); right: 1rem;
  background: var(--card); border: 1.5px solid var(--sky-border); border-radius: 16px;
  padding: .9rem; box-shadow: var(--shadow-lg); z-index: 400;
  display: flex; flex-direction: column; gap: .7rem; width: min(340px, calc(100vw - 2rem));
  animation: slideInRight .3s cubic-bezier(.4,0,.2,1);
}
@keyframes slideInRight { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeOutDown { to { opacity: 0; transform: translateY(20px); } }
.spb-head { display: flex; align-items: flex-start; gap: .65rem; }
.spb-icon { width: 2.15rem; height: 2.15rem; flex: 0 0 auto; border-radius: 12px; display: grid; place-items: center; font-size: 1rem; color: var(--sky2); background: var(--sky-bg); }
.spb-text { min-width: 0; color: var(--text); }
.spb-text strong { display: block; font-size: .88rem; line-height: 1.35; }
.spb-text span { display: block; margin-top: .15rem; font-size: .74rem; line-height: 1.5; color: var(--text2); }
.spb-context { display:flex; align-items:center; gap:.42rem; min-width:0; padding:.42rem .55rem; border-radius:9px; background:var(--sky-bg); color:var(--text2); font-size:.72rem; }
.spb-context span { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.spb-actions { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: .4rem; }
.spb-btn { min-height: 2.2rem; padding: .38rem .55rem; border: none; border-radius: 10px; font-size: .74rem; font-weight: 700; cursor: pointer; transition: transform .15s, filter .15s; }
.spb-btn:hover { transform: translateY(-1px); filter: brightness(.98); }
.spb-yes { background: var(--sky2); color: #fff; }
.spb-no  { background: var(--sky-bg); color: var(--text2); }
.spb-restore { background: color-mix(in srgb, var(--warning, #c47b12) 12%, var(--card)); color: var(--warning, #9a5b00); }
.spb-preferences { display: flex; align-items: center; justify-content: flex-end; gap: .35rem; padding-top: .05rem; color: var(--muted); font-size: .7rem; }
.spb-link { border: 0; padding: .15rem; background: transparent; color: var(--text2); font: inherit; cursor: pointer; }
.spb-link:hover { color: var(--sky2); text-decoration: underline; }
@media (max-width: 520px) {
  .sync-prompt-bubble { left: .75rem; right: .75rem; bottom: calc(var(--tab-h) + .75rem); width: auto; }
  .spb-actions { grid-template-columns: 1fr; }
}

/* ============================================================
   管理员推送横幅
   ============================================================ */
.admin-push-banner {
  position: fixed; top: calc(var(--header-h) + .7rem); left: 50%;
  transform: translateX(-50%);
  background: var(--card); border: 1.5px solid #fbbf24; border-radius: 14px;
  padding: .7rem 1rem; display: flex; align-items: center; gap: .65rem;
  box-shadow: var(--shadow-lg); z-index: 400; max-width: min(90vw, 380px);
  animation: slideDown .2s cubic-bezier(.23,1,.32,1);
}
.apb-icon { font-size: 1.3em; flex-shrink: 0; }
.apb-body { flex: 1; min-width: 0; }
.apb-title { font-size: .85rem; font-weight: 700; color: var(--text); }
.apb-sub { font-size: .72rem; color: var(--muted); margin-top: .1rem; }
.apb-refresh { padding: .35rem .7rem; background: var(--sky2); color: #fff; border: none; border-radius: 8px; font-size: .78rem; font-weight: 600; cursor: pointer; white-space: nowrap; }
.apb-close { padding: .35rem; background: none; border: none; color: var(--muted); cursor: pointer; font-size: .9rem; }

/* ============================================================
   打印
   ============================================================ */
@media print {
  /* 不锁定纸张方向——纵向/横向都应该能正常打印，由用户在打印对话框里自己选。 */
  @page { margin: 10mm; }
  .topbar,.sidebar,.sidebar-overlay,.fab-group,.tab-bar,.week-nav,.search-bar,
  .filter-bar,.stats-row,.example-banner,.course-card-actions,
  .sync-prompt-bubble,.admin-push-banner,.modal-overlay,
  .header-card,#bannerContainer { display: none !important; }
  /* 打印哪个视图，跟屏幕上当前实际显示的保持一致——列表模式（移动端默认）
     打印列表，表格模式打印表格，不再无条件强制表格。 */
  body.list-mode .schedule-table-wrap  { display: none  !important; }
  body.list-mode .list-view            { display: block !important; }
  body:not(.list-mode) .schedule-table-wrap { display: block !important; }
  body:not(.list-mode) .list-view           { display: none  !important; }
  .schedule-table th, .schedule-table td { border: 1px solid #ddd !important; }
  .course-actions { display: none !important; }
  .main { padding-top: 0 !important; padding-bottom: 0 !important; }
  /* 打印时固定表格宽度，避免浏览器额外缩放。 */
  .schedule-table {
    table-layout: fixed !important;
    min-width: 0 !important;
    width: 100% !important;
    font-size: 9px !important;
  }
  .schedule-table-wrap { min-width: 0 !important; width: 100% !important; overflow: visible !important; }
  .schedule-table th, .schedule-table td { word-break: break-word !important; overflow-wrap: break-word !important; font-size: 9px !important; padding: .2rem !important; min-width: 0 !important; }
  .schedule-table td:first-child, .schedule-table th:first-child, .time-label-cell { width: 60px !important; }
  /* .list-view 屏幕上留了一大段 padding-bottom 给悬浮 FAB 让位，打印用不到，
     留着只会在纸上/PDF 末尾多出一整页空白。 */
  .list-view { padding-bottom: 0 !important; }
  /* 只为课程块保留打印背景，页面容器保持白色。 */
  html, body, .main {
    background: #fff !important;
    min-height: 0 !important;
    height: auto !important;
  }
  .course, .course-name, .course-teacher, .course-room, .course-weeks, .course-notes,
  .schedule-table th, .course-card-color, .day-header, .cc-time-badge, .special-week-tag {
    print-color-adjust: exact !important;
    -webkit-print-color-adjust: exact !important;
    color-adjust: exact !important;
  }
}

/* ============================================================
   桌面端 (≥ 768px)
   ============================================================ */
@media (min-width: 768px) {
  :root { --sidebar-w: 240px; }
  body.desktop-mode .sidebar { transform: translateX(0) !important; position: fixed; }
  body.desktop-mode .sidebar-overlay { display: none !important; }
  body.desktop-mode .main { margin-left: var(--sidebar-w); }
  body.desktop-mode .topbar-menu-btn { display: none; }

  /* 桌面端：覆盖移动端规则，强制表格视图 */
  .schedule-table-wrap { display: block !important; }
  .list-view { display: none !important; }
  body.list-mode .schedule-table-wrap { display: none !important; }
  body.list-mode .list-view { display: block !important; }

  .schedule-table { min-width: 600px; }
  .time-label-cell { width: 72px; }
  .schedule-table th { font-size: .72rem; }
  .schedule-table td { min-height: 56px; }
  .course-name { font-size: .73rem !important; }

  .tab-bar { display: none; }
  .fab-group { bottom: 1.5rem; }
  /* 桌面端没有tab栏，FAB下移，相应缩小底部留白 */
  .schedule-table-wrap { padding-bottom: 5rem; }
  .list-view { padding-bottom: 5rem; }
  .toast { bottom: 1.5rem; }
  .modal-overlay { align-items: center; }
  .modal-sheet { border-radius: 20px; max-width: 560px; margin: auto; transform: translateY(0) scale(.95); }
  .modal-overlay.open .modal-sheet { transform: translateY(0) scale(1); }
  .dash-grid { grid-template-columns: repeat(3, 1fr); }
  .week-label { display: block; }
  .hc-actions { display: flex; }
  /* 桌面端: 列表卡片操作按钮鼠标悬停显示 */
  .course-card-actions { display: flex; opacity: 0; pointer-events: none; }
  .course-card:hover .course-card-actions { opacity: 1; pointer-events: auto; }
  /* 桌面端: 表格课程格操作按钮鼠标悬停显示 */
  .course-actions { opacity: 0; }
  .course:hover .course-actions { opacity: 1; }
}

/* ============================================================
   超小屏 (≤ 360px)
   ============================================================ */
@media (max-width: 400px) {
  /* 两列表单行（比如学期起止日期、教师+教室）在超窄屏上并排会挤得太紧，
     原生日期选择器尤其容易被压得显示不全，改成单列纵向排列。 */
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 360px) {
  .hc-class { font-size: .98rem; }
  .topbar-school { display: none; }
  .week-nav-btn { width: 36px; height: 36px; }
  .schedule-table { min-width: 420px; }
  /* 超小屏 toast 字号稍小，确保不超出 */
  .toast { font-size: .78rem; padding: .5rem .9rem; max-width: 92vw; }
}

/* ============================================================
   动画
   ============================================================ */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-content { animation: fadeIn .14s ease-out; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ============================================================
   页面过渡
   ============================================================ */
.page-content { display: none; }
.page-content.active { display: block; }

/* ============================================================
   天气卡片
   ============================================================ */
#dashWeatherCard { position: relative; }

/* ============================================================
   IP加载状态
   ============================================================ */
.ip-loading { display: inline-flex; align-items: center; gap: .4rem; }
.ip-loading::after { content: ''; width: 12px; height: 12px; border: 2px solid var(--sky-border); border-top-color: var(--sky2); border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   首次访问欢迎页
   ============================================================ */
.startup-guard{position:fixed;inset:0;z-index:10000;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0b8dcc,#02b9e8);color:#fff;transition:opacity .18s ease,visibility .18s ease}
.startup-guard.is-ready{opacity:0;visibility:hidden;pointer-events:none}
.startup-guard-card{display:flex;align-items:center;gap:.65rem;padding:.75rem 1rem;border:1px solid rgba(255,255,255,.35);border-radius:14px;background:rgba(255,255,255,.12);backdrop-filter:blur(12px);font-size:.82rem;box-shadow:0 12px 30px rgba(0,69,116,.18)}
.startup-spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.42);border-top-color:#fff;border-radius:50%;animation:startup-spin .75s linear infinite}
@keyframes startup-spin{to{transform:rotate(360deg)}}
.welcome-overlay {
  position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center;
  overflow: hidden; padding: max(1.25rem, var(--safe-top)) max(1.25rem, var(--safe-right)) max(1.25rem, var(--safe-bottom)) max(1.25rem);
  background: radial-gradient(circle at 18% 15%, rgba(139,208,237,.5), transparent 36%),
    radial-gradient(circle at 82% 85%, rgba(185,228,246,.5), transparent 38%), #eaf6ff;
  transition: opacity .24s ease, visibility .24s ease;
}
.welcome-overlay[hidden] { display: none; }
.welcome-overlay.is-closing { opacity: 0; visibility: hidden; }
.welcome-panel {
  position: relative; z-index: 1; width: min(100%, 560px); padding: clamp(1.7rem, 5vw, 3rem);
  border: 1px solid rgba(255,255,255,.8); border-radius: 30px;
  background: rgba(255,255,255,.78); box-shadow: 0 22px 70px rgba(2,132,199,.18), inset 0 1px rgba(255,255,255,.9);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); text-align: left;
  animation: welcome-rise .5s cubic-bezier(.2,.8,.2,1) both;
}
.welcome-mark { display: inline-flex; position: relative; align-items: center; justify-content: center; width: 54px; height: 54px; border-radius: 17px; background: linear-gradient(145deg,#3a9dca,#8ad0ed); color:#fff; font-size:1.35rem; box-shadow: 0 10px 24px rgba(47,143,190,.22); }
.welcome-mark span { position:absolute; width:11px; height:11px; right:-3px; top:-3px; border-radius:50%; background:#fbbf24; box-shadow:0 0 0 5px rgba(251,191,36,.15); }
.welcome-eyebrow { margin: 1.2rem 0 .5rem; color: var(--sky2); font-size: .7rem; font-weight: 750; letter-spacing: .18em; }
.welcome-panel h1 { color:var(--text); font-family:'Noto Serif SC',serif; font-size:clamp(1.8rem,6vw,3rem); line-height:1.15; letter-spacing:-.04em; }
.welcome-copy { max-width: 34rem; margin: .9rem 0 1.35rem; color:#475569; font-size:clamp(.9rem,2.3vw,1.04rem); line-height:1.8; }
.welcome-features { display:flex; flex-wrap:wrap; gap:.55rem; margin-bottom:1.4rem; }
.welcome-features span { display:inline-flex; align-items:center; gap:.35rem; padding:.42rem .65rem; border-radius:999px; background:#e0f2fe; color:var(--sky2); font-size:.76rem; }
.welcome-enter { width:100%; min-height:48px; border:0; border-radius:14px; color:#fff; background:linear-gradient(110deg,#2f8fbe,#65bde3); font-family:inherit; font-size:.95rem; font-weight:600; cursor:pointer; box-shadow:0 9px 22px rgba(47,143,190,.22); transition:transform .18s ease, box-shadow .18s ease; }
.welcome-enter:hover { transform:translateY(-2px); box-shadow:0 12px 28px rgba(2,132,199,.3); }
.welcome-enter:active { transform:translateY(0); }
.welcome-skip { display:block; margin:.85rem auto 0; border:0; background:transparent; color:#64748b; font:inherit; font-size:.75rem; cursor:pointer; }
.welcome-orbit { position:absolute; border:1px solid rgba(14,165,233,.18); border-radius:50%; pointer-events:none; animation:welcome-orbit 15s linear infinite; }
.welcome-orbit-one { width:min(76vw,680px); aspect-ratio:1; left:-18%; top:-28%; }
.welcome-orbit-two { width:min(54vw,480px); aspect-ratio:1; right:-15%; bottom:-28%; animation-duration:21s; animation-direction:reverse; }
@keyframes welcome-rise { from { opacity:0; transform:translateY(18px) scale(.98); } to { opacity:1; transform:none; } }
@keyframes welcome-orbit { to { transform:rotate(360deg); } }

/* 移动端最后一层约束：卡片按可用宽度排版，按钮不会与底部导航/FAB争抢。 */
@media (max-width: 767px) {
  :root { --tab-h: calc(68px + var(--safe-bottom)); }
  .main { width:100%; max-width:100vw; margin:0; overflow-x:hidden; }
  .topbar { gap:.4rem; padding-left:max(.55rem,var(--safe-left)); padding-right:max(.55rem,var(--safe-right)); }
  .topbar-title { min-width:0; }
  .topbar-school { font-size:.66rem; }
  .topbar-class { font-size:.88rem; }
  .topbar-actions { gap:.25rem; }
  .topbar-btn { width:34px; min-width:34px; height:34px; padding:0; }
  .term-schedule-select { max-width:min(34vw,132px) !important; font-size:.67rem; padding-left:.38rem; }
  .header-card { padding:1rem .85rem .82rem; border-radius:0 0 18px 18px; }
  .hc-school { font-size:.68rem; }
  .hc-class { font-size:1.04rem; line-height:1.35; overflow-wrap:anywhere; }
  .hc-meta { font-size:.66rem; line-height:1.45; }
  .hc-actions { gap:.35rem; flex-wrap:wrap; }
  .hc-action-btn { min-height:34px; padding:.35rem .62rem; font-size:.7rem; }
  .hc-status { font-size:.68rem; line-height:1.45; }
  .week-nav { gap:.25rem; padding:.46rem .55rem; }
  .week-nav-btn { width:32px; height:32px; }
  .week-select { min-width:0; max-width:30vw; font-size:.7rem; }
  .today-chip,.mode-chip,.view-toggle-chip { padding:.24rem .48rem; font-size:.68rem; }
  .week-label { display:none; }
  .stats-row { gap:.35rem; padding:.5rem .65rem; }
  .stat-chip { padding:.35rem .52rem; border-radius:9px; gap:.24rem; }
  .stat-chip-val { font-size:.95rem; }
  .stat-chip-lbl { font-size:.63rem; }
  .filter-bar { padding:.3rem .65rem; }
  .list-view { padding-left:.55rem; padding-right:.55rem; padding-bottom:calc(var(--tab-h) + 4.8rem); }
  .empty-schedule-guide { margin:.45rem .55rem; padding:.72rem .7rem; }
  .empty-guide-text { font-size:.76rem; }
  .fab-group { right:max(.65rem,var(--safe-right)); bottom:calc(var(--tab-h) + .55rem); }
  .fab-main { width:50px; height:50px; }
  .fab-mini { width:40px; height:40px; }
  .tab-item { font-size:.58rem; }
  .tab-item i { font-size:1rem; }
  .tab-bar-fab-space { width:48px; }
  .dashboard-card, .class-info-card, .settings-section, .public-card { max-width:100%; }
  .modal-sheet { max-height:calc(100dvh - var(--safe-top)); }
  .export-image-options { grid-template-columns:1fr; gap:.3rem; }
  .export-image-options .form-label { font-size:.72rem; }
  .term-name-suggestion { align-items:flex-start; flex-direction:column; }
}
@media (prefers-reduced-motion: reduce) {
  .welcome-overlay *, .page-content, .status-dot { animation:none !important; transition:none !important; }
}



/* =========================
   移动端欢迎提示优化
========================= */
.welcome-tip,
.notice-text,
.dashboard-welcome,
.welcome-banner {
    max-width: 100%;
    overflow-wrap: break-word;
    word-break: break-word;
    white-space: normal;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .welcome-tip,
    .notice-text,
    .dashboard-welcome,
    .welcome-banner {
        font-size: 0.92rem !important;
        padding: 0.9rem 1rem !important;
        border-radius: 16px;
        box-sizing: border-box;
        overflow: hidden;
    }

    .dashboard-card,
    .glass-card,
    .hero-card {
        overflow: hidden;
    }
}

/* ===== 移动端卡片防溢出 ===== */
@media (max-width:768px){

  *{
    box-sizing:border-box;
  }

  .glass-card,
  .dashboard-card,
  .hero-card,
  .notice-card,
  .welcome-card,
  .card{
    width:100% !important;
    max-width:100% !important;
    overflow:hidden !important;
    border-radius:22px !important;
  }

  .welcome-tip,
  .notice-text,
  .dashboard-welcome,
  .welcome-banner,
  .hero-desc,
  .card-desc,
  .card-text{
    width:100% !important;
    max-width:100% !important;

    white-space:normal !important;
    overflow-wrap:anywhere !important;
    word-break:break-word !important;

    display:block !important;
    line-height:1.7 !important;

    padding-right:0 !important;
  }

  .welcome-tip *,
  .notice-text *,
  .dashboard-welcome *,
  .welcome-banner *{
    max-width:100% !important;
    word-break:break-word !important;
  }
}

/* ============================================================
   邮件/通知面板
   ============================================================ */
.mail-item {
  display: flex; gap: .7rem; padding: .75rem .6rem;
  border-bottom: 1px solid var(--sky-border); cursor: pointer;
  transition: background .15s; border-radius: 10px; margin-bottom: .25rem;
}
.mail-item:hover { background: var(--sky-bg); }
.mail-item.unread { background: linear-gradient(135deg, rgba(14,165,233,.06), rgba(14,165,233,.02)); }
.mail-icon { width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.05rem; flex-shrink: 0; }
.mail-icon.info { background: rgba(14,165,233,.12); }
.mail-icon.warning { background: rgba(249,115,22,.12); }
.mail-icon.success { background: rgba(16,185,129,.12); }
.mail-icon.holiday { background: rgba(16,185,129,.12); }
.mail-body { flex: 1; min-width: 0; }
.mail-title { font-size: .83rem; font-weight: 600; color: var(--text); margin-bottom: .15rem; }
.mail-item.unread .mail-title::before { content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--sky2); margin-right: .35rem; vertical-align: middle; }
.mail-preview { font-size: .73rem; color: var(--text2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mail-time { font-size: .67rem; color: var(--muted); margin-top: .2rem; }
.mail-actions { display: flex; gap: .4rem; margin-top: .5rem; }
.mail-action-btn { padding: .2rem .6rem; border-radius: 20px; border: 1.5px solid var(--sky-border); background: none; font-size: .7rem; cursor: pointer; color: var(--text2); font-family: inherit; transition: background-color .14s ease, border-color .14s ease, color .14s ease; }
.mail-action-btn.read-btn:hover { background: var(--sky-light); color: var(--sky2); border-color: var(--sky3); }
.mail-action-btn.ignore-btn:hover { background: rgba(239,68,68,.08); color: #dc2626; border-color: rgba(239,68,68,.3); }
.mail-action-btn.ignored { color: var(--muted); text-decoration: line-through; }


/* ── 时间段课间设置 ── */

/* ================================================================
   AI 智能排课面板
   ================================================================ */

/* 遮罩 + 面板容器 */
#aiPanelOverlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 1200;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
#aiPanelOverlay.open { display: flex; }

#aiPanel {
  background: var(--card);
  border-radius: 1rem;
  width: min(520px, 100%);
  max-height: 90dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,.25);
}

/* 面板头部 */
.ai-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 1.1rem .7rem;
  border-bottom: 1px solid var(--sky-border);
  flex-shrink: 0;
}
.ai-panel-header h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.ai-panel-close {
  background: none; border: none;
  font-size: 1.2rem; color: var(--muted);
  cursor: pointer; line-height: 1;
  padding: .2rem .4rem;
  border-radius: .4rem;
  transition: background .15s;
}
.ai-panel-close:hover { background: var(--sky-border); }

/* 可滚动主体 */
.ai-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: .9rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: .85rem;
}

/* API 设置区 */
.ai-settings-section {
  background: var(--bg);
  border: 1px solid var(--sky-border);
  border-radius: .65rem;
  padding: .75rem .9rem;
}
.ai-settings-section summary {
  cursor: pointer;
  font-size: .82rem;
  font-weight: 600;
  color: var(--muted);
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: .35rem;
}
.ai-settings-section summary::before { content: '⚙️'; }
.ai-settings-section[open] summary { color: var(--text); }
.ai-settings-fields {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  margin-top: .7rem;
}
.ai-settings-fields label {
  font-size: .78rem;
  color: var(--muted);
  margin-bottom: .15rem;
  display: block;
}
.ai-settings-fields input {
  width: 100%;
  padding: .45rem .6rem;
  border: 1px solid var(--sky-border);
  border-radius: .45rem;
  background: var(--card);
  color: var(--text);
  font-size: .84rem;
}
.ai-save-btn {
  margin-top: .55rem;
  padding: .42rem .9rem;
  background: var(--sky2);
  color: #fff;
  border: none;
  border-radius: .45rem;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s;
}
.ai-save-btn:hover { opacity: .88; }

/* 功能标签页 */
.ai-tabs {
  display: flex;
  gap: .4rem;
  background: var(--bg);
  border-radius: .55rem;
  padding: .25rem;
}
.ai-tab-btn {
  flex: 1;
  padding: .45rem .5rem;
  border: none;
  background: none;
  border-radius: .4rem;
  font-size: .83rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.ai-tab-btn.active {
  background: var(--card);
  color: var(--sky);
  box-shadow: 0 1px 4px rgba(0,0,0,.1);
}

/* 各功能区块 */
.ai-section { display: none; }
.ai-section.active { display: block; }

.ai-section-title {
  font-size: .8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: .45rem;
}

.ai-prompt-textarea {
  width: 100%;
  min-height: 90px;
  padding: .55rem .7rem;
  border: 1px solid var(--sky-border);
  border-radius: .55rem;
  background: var(--bg);
  color: var(--text);
  font-size: .85rem;
  resize: vertical;
  line-height: 1.5;
}
.ai-prompt-textarea:focus {
  outline: none;
  border-color: var(--sky);
}

.ai-run-btn {
  width: 100%;
  padding: .6rem;
  background: linear-gradient(135deg, var(--sky2), var(--sky));
  color: #fff;
  border: none;
  border-radius: .55rem;
  font-size: .88rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: .5rem;
  transition: opacity .15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
}
.ai-run-btn:hover:not(:disabled) { opacity: .88; }
.ai-run-btn:disabled { opacity: .5; cursor: not-allowed; }

/* 状态文字 */
.ai-status {
  font-size: .78rem;
  color: var(--muted);
  min-height: 1.2em;
  margin-top: .3rem;
}

/* 图片上传 */
.ai-image-upload-area {
  border: 2px dashed var(--sky-border);
  border-radius: .65rem;
  padding: 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s;
}
.ai-image-upload-area:hover { border-color: var(--sky); }
.ai-image-upload-label {
  display: block;
  cursor: pointer;
  font-size: .84rem;
  color: var(--muted);
}
.ai-image-upload-label i { font-size: 1.4rem; display: block; margin-bottom: .35rem; color: var(--sky); }
#aiImageInput { display: none; }
#aiImagePreview {
  display: none;
  width: 100%;
  max-height: 180px;
  object-fit: contain;
  border-radius: .5rem;
  margin-top: .6rem;
  border: 1px solid var(--sky-border);
}

/* 预览卡片区 */
#aiPreviewArea {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  overflow: visible;
}
#aiResultsPane { flex: 0 0 auto; min-width: 0; }
#aiResultsPane[hidden], #aiSmartReviewBtn[hidden], #aiImageReviewBtn[hidden] { display: none; }
#aiRescheduleReviewBtn[hidden], #aiPreviewArea[hidden], #aiReschedulePreview[hidden] { display: none; }
#aiPanelOverlay.ai-review-mode #aiPanel { height: min(90dvh, 900px); width: min(760px, 100%); }
.ai-review-toolbar .btn { min-height: 44px; white-space: normal; }
.ai-diff-old, .ai-diff-new, .ai-card-name { min-width: 0; overflow-wrap: anywhere; }
.ai-panel-header, .ai-panel-footer { flex-shrink: 0; }
@media (pointer: coarse) {
  #aiPanelOverlay { padding: max(.4rem, env(safe-area-inset-top)) .4rem max(.4rem, env(safe-area-inset-bottom)); }
  #aiPanelOverlay.ai-review-mode #aiPanel { height: 94dvh; max-height: 94dvh; }
  .ai-card-action-btn, .ai-preview-check { min-height: 44px; }
  .ai-card-action-btn { min-width: 44px; }
  .ai-panel-footer button { min-height: 48px; white-space: normal; }
}
.ai-review-toolbar { display: none; }
#aiPanelOverlay.ai-review-mode .ai-panel-body > :not(#aiResultsPane) { display: none !important; }
#aiPanelOverlay.ai-review-mode .ai-review-toolbar { display: block; margin-bottom: 1rem; }
.ai-review-toolbar h3 { margin: .75rem 0 .4rem; }
.ai-review-toolbar p { color: var(--muted); line-height: 1.6; margin: 0; }
.ai-panel-body { min-height: 0; }
.ai-preview-card { flex-shrink: 0; overflow-wrap: anywhere; }
.ai-preview-card {
  background: var(--bg);
  border-radius: .55rem;
  padding: .55rem .75rem;
  font-size: .82rem;
  border-left: 3px solid var(--sky);
}
.ai-preview-check {
  display: flex;
  align-items: center;
  gap: .45rem;
  cursor: pointer;
}
.ai-preview-check input[type=checkbox] { flex-shrink: 0; accent-color: var(--sky); }
.ai-card-name { font-weight: 700; color: var(--text); }
.ai-card-meta { color: var(--muted); font-size: .76rem; margin-top: .18rem; }
.ai-card-note { font-style: italic; }
.ai-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: .4rem; }
.ai-card-actions { display: flex; gap: .3rem; flex-shrink: 0; }
.ai-card-action-btn {
  width: 24px; height: 24px; border-radius: 6px; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center; font-size: .72rem;
  background: rgba(148,163,184,.15); color: var(--text2);
}
.ai-card-action-btn:hover { background: rgba(148,163,184,.28); }
.ai-card-action-btn.del:hover { background: rgba(239,68,68,.18); color: #dc2626; }
.ai-edit-form { display: flex; flex-direction: column; gap: .4rem; margin-top: .4rem; }
.ai-edit-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: .4rem; }
.ai-edit-form input, .ai-edit-form select {
  font-size: .78rem; padding: .35rem .5rem; border-radius: 6px;
  border: 1px solid var(--sky-border); background: var(--card); color: var(--text); width: 100%;
}
.ai-edit-form-slots { display: flex; flex-wrap: wrap; gap: .3rem; max-height: 90px; overflow-y: auto; padding: .3rem; background: var(--bg); border-radius: 6px; }
.ai-edit-form-slots label { display: flex; align-items: center; gap: .25rem; font-size: .72rem; white-space: nowrap; cursor: pointer; }
.ai-edit-form-actions { display: flex; justify-content: flex-end; gap: .4rem; margin-top: .15rem; }

/* 底部确认栏 */
.ai-panel-footer {
  display: flex;
  gap: .6rem;
  padding: .75rem 1.1rem;
  border-top: 1px solid var(--sky-border);
  flex-shrink: 0;
}
.ai-cancel-btn {
  flex: 1;
  padding: .55rem;
  background: var(--bg);
  border: 1px solid var(--sky-border);
  border-radius: .55rem;
  font-size: .85rem;
  color: var(--muted);
  cursor: pointer;
  font-weight: 600;
  transition: background .15s;
}
.ai-cancel-btn:hover { background: var(--sky-border); }
.ai-confirm-btn {
  flex: 2;
  padding: .55rem;
  background: linear-gradient(135deg, #10b981, #34d399);
  color: #fff;
  border: none;
  border-radius: .55rem;
  font-size: .85rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity .15s;
}
.ai-confirm-btn:hover { opacity: .88; }

/* 移动端适配 */
@media (max-width: 767px) {
  #aiPanelOverlay { align-items: flex-end; padding: var(--safe-top) 0 0; }
  #aiPanel {
    border-radius: 20px 20px 0 0;
    max-height: calc(100dvh - var(--safe-top));
    padding-bottom: var(--safe-bottom);
  }
  .ai-panel-body { padding: .75rem .85rem; }
}
.filter-divider { color: var(--sky-border); margin: 0 .35rem; user-select: none; }
.filter-tag.time-filter { border-style: dashed; }
/* ── 调课 diff 预览 ── */
.ai-reschedule-hint {
  font-size: .76rem; color: var(--muted); background: var(--bg);
  border-radius: .45rem; padding: .45rem .65rem; margin-bottom: .5rem;
  line-height: 1.6;
}
#aiReschedulePreview { display: flex; flex-direction: column; gap: .5rem; max-height: 260px; overflow-y: auto; }
.ai-reschedule-card {
  background: var(--bg); border-radius: .55rem; padding: .55rem .75rem;
  font-size: .82rem;
}
.ai-reschedule-card.delete-card { border-left: 3px solid #ef4444; }
.ai-reschedule-card.edit-card   { border-left: 3px solid #f59e0b; }
.ai-reschedule-card-head { display: flex; align-items: center; gap: .4rem; margin-bottom: .3rem; }
.ai-reschedule-op-badge {
  font-size: .68rem; font-weight: 700; padding: .1rem .4rem;
  border-radius: .25rem; flex-shrink: 0;
}
.badge-delete { background: rgba(239,68,68,.15); color: #dc2626; }
.badge-edit   { background: rgba(245,158,11,.15); color: #d97706; }
.ai-diff-table { display: flex; flex-direction: column; gap: .22rem; margin-top: .1rem; }
.ai-diff-row {
  display: grid; grid-template-columns: 3.5rem 1fr auto 1fr;
  align-items: center; gap: .35rem; font-size: .76rem;
}
.ai-diff-field { color: var(--muted); font-weight: 600; }
.ai-diff-old   { color: var(--muted); text-decoration: line-through; }
.ai-diff-arrow { color: var(--muted); }
.ai-diff-new   { color: var(--sky); font-weight: 600; }

/* ── 时间段智能填充面板 ──────────────────────────── */
.ts-fill-cfg {
  background: var(--card2, #f1f5f9);
  border: 1px solid var(--border, #e2e8f0);
  border-radius: 10px;
  padding: .75rem .85rem;
  margin: .5rem 0 .6rem;
  animation: fadeIn .15s ease;
}
.ts-fill-cfg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 10rem), 1fr));
  gap: .5rem;
}

/* ── 课程颜色色板 ──────────────────────────────────── */
.color-swatch-row {
  display: flex;
  flex-wrap: wrap;
  gap: .28rem;
  margin-top: .3rem;
  align-items: center;
}
.color-swatch {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  box-sizing: border-box;
  transition: transform .12s, border-color .12s;
  flex-shrink: 0;
}
.color-swatch:hover { transform: scale(1.22); }
.color-swatch.selected { border-color: var(--text, #1e293b); transform: scale(1.18); }

/* 保存失败恢复：明确提示未落库的编辑，并提供安全恢复出口。 */
.save-recovery-notice {
  position: fixed; right: 1rem; bottom: 1rem; z-index: 1200;
  width: min(25rem, calc(100vw - 2rem)); padding: .85rem 1rem;
  display: grid; gap: .7rem; color: #422006; background: #fffbeb;
  border: 1px solid #fbbf24; border-radius: .8rem;
  box-shadow: 0 14px 34px rgba(15, 23, 42, .2); font-size: .85rem;
}
.save-recovery-notice strong, .save-recovery-notice span { display: block; }
.save-recovery-notice span { margin-top: .22rem; line-height: 1.45; }
.save-recovery-notice > div:last-child { display: flex; flex-wrap: wrap; gap: .5rem; }
.save-recovery-notice button {
  border: 0; border-radius: .45rem; padding: .42rem .7rem; cursor: pointer;
  color: #fff; background: #b45309; font: inherit; font-weight: 650;
}
.save-recovery-notice .save-recovery-alt { color: #78350f; background: #fff; border: 1px solid #d97706; }
@media (max-width: 560px) { .save-recovery-notice { bottom: .7rem; right: .7rem; width: calc(100vw - 1.4rem); } }

/* 危险操作按影响范围分层，描述与按钮保持同一行，移动端自然堆叠。 */
.danger-zone { background: rgba(220,38,38,.055); border: 1.5px solid rgba(220,38,38,.2); border-radius: 14px; padding: 1rem; }
.danger-zone-title { color: #b4232f; font-weight: 750; margin-bottom: .25rem; }
.danger-zone-note { color: var(--text2); font-size: .76rem; line-height: 1.55; margin: 0 0 .8rem; }
.danger-actions { display: grid; gap: .55rem; }
.danger-action { display: flex; align-items: center; justify-content: space-between; gap: .8rem; padding: .7rem .75rem; border-radius: 11px; border: 1px solid var(--sky-border); background: rgba(242,248,250,.78); }
.danger-action > div { min-width: 0; display: grid; gap: .18rem; }
.danger-action strong { color: var(--text); font-size: .82rem; }
.danger-action span { color: var(--muted); font-size: .72rem; line-height: 1.45; }
.danger-action .btn { flex: 0 0 auto; }
.danger-action-recoverable { border-color: rgba(217,119,6,.28); background: #fffaf0; }
.danger-action-local { border-color: rgba(47,143,190,.28); background: #eef9fb; }
.danger-action-destructive { border-color: rgba(220,38,38,.32); background: #fff5f5; }
@media (max-width: 560px) { .danger-action { align-items: stretch; flex-direction: column; } .danger-action .btn { width: 100%; } }

/* 封版可访问性基线：键盘焦点不能依赖各组件自行补齐。 */
:where(button, a, input, select, textarea, [role="button"], [tabindex]):focus-visible {
  outline: 3px solid rgba(14, 165, 233, .42);
  outline-offset: 2px;
}
:where(button, a, [role="button"]) { touch-action: manipulation; }
:where(.modal-overlay, .sheet-overlay, .profile-modal, .ai-panel-overlay) { overscroll-behavior: contain; }

/* 移动端交互收口：所有站内弹层统一为底部决策面板，并为刘海屏、手势区和软键盘留出空间。 */
@media (max-width: 767px) {
  .topbar-menu-btn,
  .topbar-btn,
  .sheet-close,
  .profile-close,
  .entity-item-del,
  .locale-btn,
  .ai-panel-close { min-width: 44px; min-height: 44px; }

  .btn,
  .form-control,
  .stab,
  .ts-scheme-tab,
  .ts-add-scheme-btn,
  .spb-btn,
  .ai-tab-btn,
  .ai-run-btn,
  .ai-save-btn,
  .ai-cancel-btn,
  .ai-confirm-btn { min-height: 44px; }

  .modal-overlay,
  .recommend-modal,
  .profile-modal,
  .conflict-modal {
    align-items: flex-end;
    padding: var(--safe-top) 0 0;
  }

  .modal-sheet,
  .recommend-box,
  .profile-box,
  .conflict-box {
    width: 100%;
    max-width: none;
    max-height: calc(100dvh - var(--safe-top));
    margin: 0;
    border-radius: 20px 20px 0 0;
  }

  .modal-sheet,
  .recommend-box,
  .profile-box { padding-bottom: var(--safe-bottom); }
  .conflict-box { padding-bottom: calc(1.1rem + var(--safe-bottom)); }
  .sheet-body,
  .recommend-body,
  .profile-body { overscroll-behavior: contain; }
  .sheet-foot,
  .recommend-footer,
  .ai-panel-footer {
    padding-bottom: max(.8rem, var(--safe-bottom));
    background: var(--card);
  }
  .sheet-foot > .btn,
  .recommend-footer > .btn,
  .conflict-btns > .btn { flex: 1; min-height: 48px; }
  .profile-box { overflow-y: auto; }
  .profile-top { padding-right: 4rem; }
  .recommend-card { min-height: 52px; }
  .ai-panel-header { padding-top: .65rem; }
  .ai-panel-footer { position: sticky; bottom: 0; }
  .ai-diff-row { grid-template-columns: 3.2rem minmax(0, 1fr) auto minmax(0, 1fr); }
  .toast {
    bottom: calc(var(--tab-h) + .65rem);
    width: min(calc(100vw - 1.4rem), 360px);
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}

/* 统一选择控件：保留原生语义、键盘和系统表单提交，仅收口视觉与触控尺寸。 */
:is(select.form-control, select.form-inp, select.search-input, select.week-select, select.term-schedule-select, select.push-select, select#aiStatsRange, select#auditPageSize, select#diagRefreshInterval, select#announceType) {
  appearance: none;
  -webkit-appearance: none;
  background-color: var(--card);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23334155' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .72rem center;
  background-size: .85rem;
  padding-right: 2.15rem;
  color: var(--text);
  border-color: var(--sky-border);
  min-height: 40px;
}
:is(select.form-control, select.form-inp, select.search-input, select.week-select, select.term-schedule-select, select.push-select, select#aiStatsRange, select#auditPageSize, select#diagRefreshInterval, select#announceType):hover { border-color: var(--sky3); }
:is(select.form-control, select.form-inp, select.search-input, select.week-select, select.term-schedule-select, select.push-select, select#aiStatsRange, select#auditPageSize, select#diagRefreshInterval, select#announceType):focus-visible { border-color: var(--sky2); box-shadow: 0 0 0 3px rgba(14,165,233,.16); }
:is(select.form-control, select.form-inp, select.search-input, select.week-select, select.term-schedule-select, select.push-select, select#aiStatsRange, select#auditPageSize, select#diagRefreshInterval, select#announceType):disabled { opacity: .62; cursor: not-allowed; }
:is(select.form-control, select.form-inp, select.search-input, select.week-select, select.term-schedule-select, select.push-select, select#aiStatsRange, select#auditPageSize, select#diagRefreshInterval, select#announceType) option { color: var(--text); background: var(--card); }
select.term-schedule-select {
  color:#fff; background-color:rgba(255,255,255,.16); border-color:rgba(255,255,255,.2);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right .72rem center; background-size:.85rem; padding-right:2.15rem;
}
#termScheduleSelect {
  color:rgba(255,255,255,.96) !important;
  background-color:rgba(255,255,255,.16) !important;
  border-color:rgba(255,255,255,.32) !important;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.08),0 2px 8px rgba(2,105,161,.16);
}
#termScheduleSelect:hover { background-color:rgba(255,255,255,.24) !important; }
.term-schedule-select option { background: var(--card); color: var(--text); }
.term-schedule-select[aria-busy="true"] { cursor: wait !important; }
.term-schedule-select:disabled:not([aria-busy="true"]) { cursor: not-allowed !important; }

/* 联想列表只在小区域绘制，避免滤镜和持续布局重排造成卡顿。 */
.ac-dropdown { contain: layout paint; overscroll-behavior: contain; max-height: min(220px, 35dvh); transform-origin: top center; }
.ac-option { min-height: 42px; display: flex; align-items: center; }
@media (max-width: 767px) { .ac-option { min-height: 44px; } }

/* 共用按钮继续使用统一组件规则，仅恢复最初的蓝色映射。 */
.btn-primary,
.banner-btn-primary,
.fab-main,
.topbar-command-primary,
.welcome-enter {
  background: linear-gradient(135deg, var(--sky2), var(--sky));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(14,165,233,.3);
}
.btn-primary:hover,
.banner-btn-primary:hover,
.topbar-command-primary:hover,
.welcome-enter:hover { background: linear-gradient(135deg, #0369a1, var(--sky2)); color:#fff; }
.btn-ghost { background: var(--card); color: var(--text2); border-color: var(--sky-border); }
.btn-ghost:hover { background: var(--sky-light); color: var(--sky2); border-color: var(--sky3); }
.schedule-conflict-notice{display:flex;align-items:flex-start;gap:.5rem;margin:.45rem 0;padding:.55rem .7rem;border:1px solid rgba(245,158,11,.34);border-radius:10px;background:#fffbeb;color:#92400e;font-size:.72rem;line-height:1.5}
.schedule-conflict-notice>i{margin-top:.14rem;color:#f59e0b}.schedule-conflict-notice strong{font-weight:750}

/* ── 导入前问题课程检查面板 ───────────────────────────── */
.ip-summary{font-size:.8rem;padding:.55rem .8rem;background:var(--bg);border:1px solid var(--sky-border);border-radius:9px;margin-bottom:.7rem;line-height:1.7}
.ip-summary strong{font-weight:750}
.ip-group-title{font-size:.78rem;font-weight:750;color:var(--text);margin:.7rem 0 .4rem;display:flex;align-items:center;gap:.35rem}
.ip-group-title i{color:#d97706}
.ip-ok-note{font-size:.78rem;color:#16a34a;padding:.3rem .2rem;display:flex;align-items:center;gap:.35rem}
.ip-row{background:var(--bg);border:1px solid var(--sky-border);border-radius:10px;padding:.6rem .7rem;margin-bottom:.5rem}
.ip-row.ip-removed{opacity:.5}
.ip-row-head{display:flex;align-items:center;gap:.5rem;margin-bottom:.35rem}
.ip-tag{font-size:.7rem;padding:.14rem .5rem;border-radius:999px;font-weight:700;white-space:nowrap}
.ip-tag-format{background:rgba(234,88,12,.12);color:#c2570a;border:1px solid rgba(234,88,12,.3)}
.ip-tag-conflict{background:rgba(220,38,38,.1);color:#b91c1c;border:1px solid rgba(220,38,38,.25)}
.ip-state{font-size:.72rem;color:var(--muted)}
.ip-reason{font-size:.72rem;color:#92400e;margin:.3rem 0 .4rem;line-height:1.5}
.ip-row-actions{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:.35rem}
.ip-removed-note{font-size:.72rem;color:#b91c1c;font-weight:700}
.ip-edit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.45rem .6rem}
.ip-edit-grid label{font-size:.72rem;color:var(--muted);display:flex;flex-direction:column;gap:.2rem}
.ip-edit-grid .form-control{font-size:.78rem;padding:.4rem .5rem;min-height:34px}
.ip-row-actions .btn{font-size:.72rem;padding:.32rem .6rem}
.import-format-options{flex-wrap:wrap}
/* 密集课表也保留可读下限；超宽表格使用已有的横向滚动容器。 */
.course-name{font-size:max(.875rem,14px)!important}
.course-teacher,.course-room,.course-weeks,.course-notes,
.slot-mini,.slot-note,.time-label strong,
.schedule-th-date,.schedule-th-lunar,.schedule-th-status,.schedule-th-today{font-size:max(.75rem,12px)!important;line-height:1.45}
.import-format-options>label{min-width:0;box-sizing:border-box}
@media(max-width:380px){.import-format-options>label{flex-basis:100%!important;justify-content:flex-start}.import-format-options>label span{white-space:nowrap}}