/* ============================================================
 * style.css —— 教师工作台样式 + 6 套主题
 * ============================================================ */
:root {
  --bg: #f4f6fb;
  --bg2: #ffffff;
  --text: #1f2733;
  --muted: #8a93a6;
  --border: #e6e9f2;
  --primary: #2bb3a3;
  --primary-d: #1f8f82;
  --primary-soft: #e6f7f4;
  --sidebar-bg: linear-gradient(180deg, #1f9e92, #157a8f);
  --sidebar-text: #eafffb;
  --sidebar-active: rgba(255, 255, 255, .18);
  --danger: #e5453b;
  --warn: #e8920c;
  --ok: #2fa56b;
  --shadow: 0 6px 22px rgba(31, 39, 51, .08);
  --radius: 14px;
  --radius-sm: 9px;
}
[data-theme="ink"] { --bg:#f3ece0; --bg2:#fbf7ef; --text:#3a2f23; --muted:#9c8a72; --border:#e3d8c4;
  --primary:#9b6b3a; --primary-d:#7c5530; --primary-soft:#f3e9da;
  --sidebar-bg:linear-gradient(180deg,#5b4326,#3a2c19); --sidebar-text:#f5ead4; --sidebar-active:rgba(255,255,255,.14);
  --danger:#b1422f; --warn:#b07d1f; --ok:#5d7a3a; }
[data-theme="deepsea"] { --bg:#0f1a2b; --bg2:#16233a; --text:#e7eefb; --muted:#8195b5; --border:#26344f;
  --primary:#3b82f6; --primary-d:#2563eb; --primary-soft:#16294a;
  --sidebar-bg:linear-gradient(180deg,#0b1f3f,#0a1729); --sidebar-text:#cfe0ff; --sidebar-active:rgba(59,130,246,.22);
  --danger:#f0564b; --warn:#f0a93b; --ok:#34d399; }
[data-theme="warm"] { --bg:#fff6f0; --bg2:#ffffff; --text:#3a2b22; --muted:#a98c7c; --border:#f3e2d6;
  --primary:#ef7d4f; --primary-d:#d9632f; --primary-soft:#fde9de;
  --sidebar-bg:linear-gradient(180deg,#f0834f,#e0563c); --sidebar-text:#fff3ec; --sidebar-active:rgba(255,255,255,.2);
  --danger:#e0453b; --warn:#d98a12; --ok:#3a9d6a; }
[data-theme="mint"] { --bg:#f0fbf7; --bg2:#ffffff; --text:#1d3a32; --muted:#7fa99c; --border:#d9f0e7;
  --primary:#2fb98e; --primary-d:#1f9570; --primary-soft:#dcf5ec;
  --sidebar-bg:linear-gradient(180deg,#34c79a,#1f9e82); --sidebar-text:#eafff7; --sidebar-active:rgba(255,255,255,.18);
  --danger:#e0453b; --warn:#d98a12; --ok:#1f9570; }
[data-theme="dark"] { --bg:#0e0f13; --bg2:#17191f; --text:#e9ebf0; --muted:#8b90a0; --border:#272a33;
  --primary:#7c8cf0; --primary-d:#5f6fe0; --primary-soft:#1d2030;
  --sidebar-bg:linear-gradient(180deg,#15171e,#0c0d11); --sidebar-text:#c8cce0; --sidebar-active:rgba(124,140,240,.2);
  --danger:#f0564b; --warn:#f0a93b; --ok:#34d399; }

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
#app { display: flex; min-height: 100vh; }

/* ---------- 侧边栏 ---------- */
.sidebar {
  width: 240px; flex: 0 0 240px; background: var(--sidebar-bg); color: var(--sidebar-text);
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh;
  transition: width .2s, flex-basis .2s;
}
.sidebar.collapsed { width: 0; flex-basis: 0; overflow: hidden; }
.side-head { padding: 22px 20px 14px; border-bottom: 1px solid rgba(255, 255, 255, .12); }
.side-title { font-size: 19px; font-weight: 700; letter-spacing: .5px; }
.side-sub { font-size: 12px; opacity: .75; margin-top: 3px; }
.side-nav { flex: 1; overflow-y: auto; padding: 10px 10px 16px; }
.nav-group { font-size: 11px; opacity: .6; padding: 14px 12px 6px; letter-spacing: 1px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px;
  color: var(--sidebar-text); cursor: pointer; margin-bottom: 2px; font-size: 13.5px; opacity: .9;
  transition: background .15s, opacity .15s;
}
.nav-item:hover { background: var(--sidebar-active); opacity: 1; }
.nav-item.active { background: var(--sidebar-active); opacity: 1; font-weight: 600; }
.nav-ico { width: 20px; text-align: center; font-size: 15px; }
.nav-txt { flex: 1; }
.nav-badge {
  background: var(--danger); color: #fff; font-size: 11px; min-width: 18px; height: 18px;
  border-radius: 9px; display: inline-flex; align-items: center; justify-content: center; padding: 0 5px; font-weight: 700;
}
.side-foot { padding: 12px 16px; font-size: 11px; opacity: .55; border-top: 1px solid rgba(255, 255, 255, .1); }

/* ---------- 主区 ---------- */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: 58px; flex: 0 0 58px; background: var(--bg2); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; padding: 0 18px; position: sticky; top: 0; z-index: 5;
}
.top-left, .top-right { display: flex; align-items: center; gap: 10px; }
.icon-btn { background: none; border: none; font-size: 18px; cursor: pointer; color: var(--text); padding: 4px 8px; border-radius: 8px; }
.icon-btn:hover { background: var(--bg); }
.sem-select, .theme-select {
  border: 1px solid var(--border); background: var(--bg); color: var(--text); border-radius: 8px;
  padding: 7px 10px; font-size: 13px; cursor: pointer;
}
.status-light { font-size: 12px; color: var(--ok); }
.status-light.saving { color: var(--warn); }

.view { flex: 1; padding: 22px 26px 40px; overflow-y: auto; }

/* ---------- 按钮 ---------- */
.btn {
  border: 1px solid var(--border); background: var(--bg2); color: var(--text); padding: 8px 14px;
  border-radius: var(--radius-sm); cursor: pointer; font-size: 13px; transition: .15s; white-space: nowrap;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-d); color: #fff; }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--danger); border-color: var(--danger); }
.btn.danger:hover { background: var(--danger); color: #fff; }
.link { background: none; border: none; color: var(--primary); cursor: pointer; font-size: 13px; padding: 2px 6px; }
.link.del { color: var(--danger); }
.link:hover { text-decoration: underline; }

/* ---------- 页头 ---------- */
.page-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 18px; gap: 16px; flex-wrap: wrap; }
.page-title { font-size: 21px; margin: 0 0 4px; font-weight: 700; }
.page-desc { margin: 0; color: var(--muted); font-size: 13px; }
.page-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.search { border: 1px solid var(--border); background: var(--bg2); color: var(--text); border-radius: 8px; padding: 8px 12px; font-size: 13px; min-width: 160px; }

/* ---------- 卡片 / 表格 ---------- */
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); margin-bottom: 18px; }
.card h3 { margin: 0 0 14px; font-size: 15px; }
.card.tip { background: var(--primary-soft); border-color: transparent; color: var(--text); font-size: 13px; }
.summary-bar { background: var(--primary-soft); border-radius: var(--radius-sm); padding: 10px 14px; margin-bottom: 14px; font-size: 13px; color: var(--text); }
.table-wrap { overflow-x: auto; }
.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.tbl th, .tbl td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.tbl th { color: var(--muted); font-weight: 600; font-size: 12.5px; background: var(--bg); position: sticky; top: 0; }
.tbl tbody tr:hover { background: var(--bg); }
.tbl td.op-col, .tbl th.op-col { width: 86px; white-space: nowrap; }
.tbl .empty { text-align: center; color: var(--muted); padding: 30px; }
.danger { color: var(--danger) !important; font-weight: 600; }
.warn { color: var(--warn) !important; }
.up { color: var(--danger); font-weight: 700; }
.down { color: var(--ok); font-weight: 700; }

/* ---------- 仪表盘 ---------- */
.dash .page-title { margin-bottom: 16px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; margin-bottom: 18px; }
.stat { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; cursor: pointer; box-shadow: var(--shadow); transition: .15s; text-align: center; }
.stat:hover { transform: translateY(-2px); border-color: var(--primary); }
.stat-ico { font-size: 26px; }
.stat-n { font-size: 28px; font-weight: 800; color: var(--primary); margin: 4px 0; }
.stat-t { color: var(--muted); font-size: 13px; }
.mini { margin: 0; padding-left: 18px; }
.mini li { margin-bottom: 6px; }
.muted { color: var(--muted); }
.badge-n { background: var(--danger); color: #fff; font-size: 12px; padding: 1px 9px; border-radius: 10px; margin-left: 6px; }

/* ---------- 预警 ---------- */
.alerts-list { list-style: none; margin: 0; padding: 0; }
.alerts-list li { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px dashed var(--border); gap: 10px; }
.alerts-list li:last-child { border-bottom: none; }
.lv-urgent { color: var(--danger); }
.lv-important { color: var(--warn); }
.lv-remind { color: var(--muted); }

/* ---------- 课程表 ---------- */
.tt-wrap { overflow-x: auto; }
.tt { border-collapse: collapse; width: 100%; }
.tt th, .tt td { border: 1px solid var(--border); text-align: center; padding: 0; }
.tt thead th { background: var(--bg); padding: 10px; font-size: 13px; }
.tt-time { background: var(--bg); font-size: 12.5px; padding: 8px !important; white-space: nowrap; }
.tt-time small { color: var(--muted); font-weight: 400; }
.tt-cell { height: 64px; width: 13%; vertical-align: middle; cursor: pointer; transition: .15s; }
.tt-cell:hover { background: var(--primary-soft); }
.tt-cell.filled { background: var(--primary-soft); }
.tt-subj { font-weight: 700; font-size: 14px; }
.tt-meta { font-size: 11.5px; color: var(--muted); }
.tt-plus { color: var(--border); font-size: 18px; }

/* ---------- 校历 ---------- */
.cur-m { font-size: 15px; font-weight: 600; min-width: 96px; text-align: center; }
.cal { width: 100%; border-collapse: collapse; table-layout: fixed; }
.cal th { background: var(--bg); color: var(--muted); padding: 8px; font-size: 12.5px; border: 1px solid var(--border); }
.cal td { border: 1px solid var(--border); height: 86px; vertical-align: top; padding: 4px; cursor: pointer; }
.cal td:hover { background: var(--primary-soft); }
.cal-empty { background: var(--bg); }
.cal-day.today { background: var(--primary-soft); }
.cal-d { font-size: 12px; color: var(--muted); margin-bottom: 3px; }
.cal-legend { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.cal-leg { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--text); border-left: 3px solid var(--c); background: color-mix(in srgb, var(--c) 12%, var(--bg)); border-radius: 5px; padding: 2px 8px; }
.cal-note { display: flex; gap: 4px; align-items: center; background: color-mix(in srgb, var(--c) 14%, var(--bg)); border-left: 3px solid var(--c); border-radius: 5px; padding: 2px 5px; font-size: 11.5px; margin-bottom: 3px; overflow: hidden; }
.cal-note.red { background: #fdeaea; border-left-color: var(--danger); }
.cal-note.red .cal-t { color: var(--danger); font-weight: 600; }
.cal-ic { flex: none; font-size: 11px; line-height: 1; }
.cal-tm { flex: none; color: var(--muted); font-variant-numeric: tabular-nums; }
.cal-t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cal-more { font-size: 11px; color: var(--muted); text-align: center; }
.cal-list { display: flex; flex-direction: column; gap: 12px; }
.cal-card { border: 1px solid var(--border); border-radius: 10px; padding: 12px; background: var(--bg); }
.cal-card-top { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.cal-card-top .cal-ic { font-size: 15px; }
.cal-type-label { font-weight: 600; font-size: 13px; flex: 1; }
.cal-flags { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 4px; }
.cal-add h4 { margin: 0 0 12px; font-size: 14px; }
.cal-hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

/* ---------- 表单 / 弹窗 ---------- */
.modal-mask { position: fixed; inset: 0; background: rgba(15, 23, 35, .5); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 20px; }
.modal-mask[hidden] { display: none; }
.modal { background: var(--bg2); border-radius: var(--radius); width: 100%; max-width: 520px; max-height: 88vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0, 0, 0, .3); }
.modal-head { padding: 16px 20px; font-weight: 700; font-size: 15px; border-bottom: 1px solid var(--border); }
.modal-body { padding: 18px 20px; }
.modal-foot { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }
.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
.form-row .req { color: var(--danger); }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; border: 1px solid var(--border); background: var(--bg); color: var(--text);
  border-radius: 8px; padding: 9px 11px; font-size: 13.5px; font-family: inherit;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus { outline: none; border-color: var(--primary); }
.form-row input.err { border-color: var(--danger); }
.form-row textarea { resize: vertical; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.switch { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; }
.row-edit { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.row-edit input { border: 1px solid var(--border); background: var(--bg); color: var(--text); border-radius: 8px; padding: 7px 10px; font-size: 13px; flex: 1; }
.tag { background: var(--primary-soft); color: var(--primary); font-size: 11px; padding: 2px 8px; border-radius: 8px; }

/* 基本信息多列 */
.form-grid .form-row { grid-column: span 1; }
.per-row { display: flex; gap: 6px; align-items: center; margin-bottom: 6px; }
.per-row input { flex: 1; border: 1px solid var(--border); background: var(--bg); color: var(--text); border-radius: 7px; padding: 6px 8px; }
.cal-item { display: flex; gap: 6px; align-items: center; margin-bottom: 8px; flex-wrap: wrap; }
.cal-item input.ci-note { flex: 1; border: 1px solid var(--border); background: var(--bg); color: var(--text); border-radius: 7px; padding: 6px 8px; }
.backup-btns { display: flex; flex-direction: column; gap: 10px; }
.backup-btns .btn { text-align: center; }

/* ---------- Toast ---------- */
#toast { position: fixed; right: 20px; bottom: 20px; z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.toast { background: var(--text); color: var(--bg2); padding: 10px 16px; border-radius: 10px; font-size: 13px; box-shadow: var(--shadow); opacity: 0; transform: translateY(8px); transition: .3s; }
.toast.show { opacity: 1; transform: translateY(0); }
.toast.warn { background: var(--warn); color: #fff; }
.toast.info { background: var(--primary); color: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .sidebar { position: fixed; z-index: 40; box-shadow: var(--shadow); }
  .sidebar.collapsed { width: 240px; flex-basis: 240px; transform: translateX(-100%); }
  .view { padding: 16px 14px 40px; }
  .form-grid { grid-template-columns: 1fr; }
  .topbar { padding: 0 12px; }
  .sem-select, .theme-select { font-size: 12px; padding: 6px 8px; }
}