:root {
  --bg: #f7f6f3;
  --panel: #ffffff;
  --ink: #1c2530;
  --ink-2: #5b6672;
  --line: #e3e0d8;
  --accent: #0f6b5f;
  --accent-soft: #e2f0ed;
  --warn: #a4531f;
  --warn-soft: #f7e9dd;
  --gold: #8a6d1a;
  --gold-soft: #f5eed8;
  --chip: #eef0f2;
  --ok: #2c7a3f;
  --radius: 10px;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg); color: var(--ink);
  font-size: 15px; line-height: 1.65;
}
#topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 18px;
  background: #10241f; color: #eaf4f1;
  padding: 10px 22px; flex-wrap: wrap;
}
#topbar .brand { color: #fff; font-weight: 700; text-decoration: none; font-size: 17px; letter-spacing: .5px; }
#topbar .brand span { font-weight: 400; font-size: 13px; opacity: .75; }
#mainnav a, #course-nav-slot a {
  color: #cfe6e0; text-decoration: none; font-size: 13.5px;
  padding: 4px 10px; border-radius: 6px;
}
#mainnav a:hover, #course-nav-slot a:hover, #mainnav a.active, #course-nav-slot a.active { background: rgba(255,255,255,.14); color: #fff; }
#course-nav-slot { display: flex; gap: 2px; flex-wrap: wrap; }
#course-nav-slot .sep { opacity: .35; margin: 0 4px; }
main { max-width: 1180px; margin: 0 auto; padding: 26px 22px 80px; }
#footer {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: #10241f; color: #9fc0b8; font-size: 12px;
  padding: 6px 22px; display: flex; gap: 16px; align-items: center;
}
#status-badge { color: #ffd57a; }

h1 { font-size: 26px; margin: 4px 0 6px; }
h2 { font-size: 20px; margin: 26px 0 10px; border-bottom: 2px solid var(--line); padding-bottom: 6px; }
h3 { font-size: 16.5px; margin: 18px 0 8px; }
a { color: var(--accent); }
.muted { color: var(--ink-2); font-size: 13px; }
.small { font-size: 12.5px; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin: 14px 0; }
.grid { display: grid; gap: 14px; }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--chip); border-radius: 999px;
  padding: 2px 11px; font-size: 12.5px; margin: 2px 4px 2px 0;
}
.chip.core { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.chip.important { background: var(--gold-soft); color: var(--gold); }
.chip.supporting { background: var(--chip); color: var(--ink-2); }
.chip.type { background: transparent; border: 1px solid var(--line); }
.chip.click { cursor: pointer; }
.chip.click:hover { outline: 2px solid var(--accent); }

.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; cursor: pointer; transition: box-shadow .12s, transform .12s;
}
.card:hover { box-shadow: 0 3px 14px rgba(20,40,60,.10); transform: translateY(-1px); }
.card h4 { margin: 0 0 4px; font-size: 15px; }
.card p { margin: 0; color: var(--ink-2); font-size: 13px; }

.node-card .def { color: var(--ink); font-size: 13.5px; margin-top: 6px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

.sourcebox {
  background: var(--gold-soft); border-left: 4px solid var(--gold);
  padding: 10px 14px; border-radius: 6px; font-size: 13px; margin: 10px 0;
}
.sourcebox .src-title { font-weight: 600; }
blockquote.quote {
  margin: 8px 0; padding: 8px 14px; border-left: 3px solid var(--accent);
  background: var(--accent-soft); font-size: 13.5px; border-radius: 0 6px 6px 0;
  font-style: normal; color: #0d4a41;
}
blockquote.quote::before { content: "“"; font-size: 18px; color: var(--accent); }
blockquote.quote::after { content: "”"; font-size: 18px; color: var(--accent); }

.kv { display: grid; grid-template-columns: 130px 1fr; gap: 4px 12px; font-size: 13.5px; }
.kv dt { color: var(--ink-2); }
.kv dd { margin: 0; }

table.tbl { border-collapse: collapse; width: 100%; font-size: 13px; margin: 10px 0; }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 6px 9px; text-align: left; }
.tbl th { background: var(--chip); }
.tbl tr.hl { background: var(--accent-soft); font-weight: 600; }
.tbl td.num { font-family: var(--mono); text-align: right; }

.btn {
  display: inline-block; background: var(--accent); color: #fff; border: none;
  border-radius: 7px; padding: 8px 16px; font-size: 14px; cursor: pointer; margin: 4px 6px 4px 0;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--accent); border: 1.5px solid var(--accent); }
.btn.warn { background: var(--warn); }
.btn:disabled { opacity: .45; cursor: default; }

.slider-row { display: flex; align-items: center; gap: 10px; margin: 8px 0; flex-wrap: wrap; }
.slider-row label { min-width: 150px; font-size: 13.5px; }
.slider-row input[type=range] { flex: 1; min-width: 160px; accent-color: var(--accent); }
.slider-row .val { font-family: var(--mono); min-width: 70px; text-align: right; font-size: 13.5px; }

.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0; }
.tab {
  border: 1px solid var(--line); background: var(--panel); border-radius: 8px;
  padding: 6px 14px; cursor: pointer; font-size: 13.5px;
}
.tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.quiz-option {
  display: block; width: 100%; text-align: left; margin: 6px 0; padding: 10px 14px;
  border: 1.5px solid var(--line); border-radius: 8px; background: var(--panel);
  cursor: pointer; font-size: 14px; font-family: inherit;
}
.quiz-option:hover { border-color: var(--accent); }
.quiz-option.correct { border-color: var(--ok); background: #e8f4ea; }
.quiz-option.wrong { border-color: #b3392f; background: #f9e9e7; }
.quiz-option.reveal { opacity: 1; }
.explain { background: var(--accent-soft); border-radius: 8px; padding: 12px 16px; margin: 10px 0; font-size: 13.5px; }
.explain .src { display: block; margin-top: 6px; font-size: 12px; color: var(--gold); }

.svgwrap { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 8px; margin: 10px 0; overflow-x: auto; }
svg text { font-family: var(--ui, inherit); font-size: 11px; fill: var(--ink-2); }

.flip { perspective: 900px; cursor: pointer; }
.flip-inner { transition: transform .35s; transform-style: preserve-3d; position: relative; }
.flip.flipped .flip-inner { transform: rotateY(180deg); }
.flip-face { backface-visibility: hidden; }
.flip-back { position: absolute; inset: 0; transform: rotateY(180deg); }

.statrow { display: flex; gap: 18px; flex-wrap: wrap; margin: 8px 0; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 16px; min-width: 110px; }
.stat b { display: block; font-size: 22px; color: var(--accent); }
.stat span { font-size: 12px; color: var(--ink-2); }

.badge { font-size: 11px; padding: 2px 8px; border-radius: 5px; vertical-align: middle; }
.badge.stable { background: #e8f4ea; color: var(--ok); }
.badge.draft { background: var(--gold-soft); color: var(--gold); }
.badge.outline_only { background: #e4ecf7; color: #2b5aa0; }
.badge.awaiting_sources { background: #eee; color: #777; }
.badge.unknown { background: var(--warn-soft); color: var(--warn); }
.badge.cross { background: #ece4f5; color: #5b3f96; }
.badge.inferred { background: #f0e9fa; color: #6b4fbb; }

.theme-block { margin: 16px 0; }
.theme-block > h3 .muted { font-weight: 400; }

.warnbox { background: var(--warn-soft); border-left: 4px solid var(--warn); padding: 10px 14px; border-radius: 6px; font-size: 13.5px; margin: 10px 0; }
.okbox { background: #e8f4ea; border-left: 4px solid var(--ok); padding: 10px 14px; border-radius: 6px; font-size: 13.5px; margin: 10px 0; }

.exam-meta { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 8px 0; }
select, input[type=text], input[type=number] {
  font-family: inherit; font-size: 13.5px; padding: 6px 10px; border: 1px solid var(--line);
  border-radius: 7px; background: #fff;
}
.progress { height: 8px; background: var(--chip); border-radius: 4px; overflow: hidden; margin: 6px 0; }
.progress > div { height: 100%; background: var(--accent); }

.matrix { border-collapse: collapse; font-size: 12.5px; }
.matrix td, .matrix th { border: 1px solid var(--line); padding: 5px 8px; }
.matrix td.good { background: #e8f4ea; } .matrix td.mid { background: var(--gold-soft); } .matrix td.bad { background: #f9e9e7; }

.canvas9 { display: grid; grid-template-columns: repeat(10, 1fr); gap: 6px; }
.canvas9 .blk { border: 1.5px solid var(--line); border-radius: 8px; padding: 8px; cursor: pointer; background: #fff; min-height: 86px; }
.canvas9 .blk.active { border-color: var(--accent); background: var(--accent-soft); }
.canvas9 .blk h5 { margin: 0 0 4px; font-size: 12.5px; }
.canvas9 .blk .en { font-size: 10.5px; color: var(--ink-2); }
.canvas9 .blk.kp { grid-column: span 2; } .canvas9 .blk.ka { grid-column: span 2; }
.canvas9 .blk.kr { grid-column: span 2; } .canvas9 .blk.vp { grid-column: span 2; grid-row: span 2; }
.canvas9 .blk.cr { grid-column: span 2; } .canvas9 .blk.ch { grid-column: span 2; }
.canvas9 .blk.cs { grid-column: span 2; }
.canvas9 .blk.rs { grid-column: span 5; } .canvas9 .blk.cost { grid-column: span 5; }

@media (max-width: 860px) {
  .canvas9 { grid-template-columns: repeat(2, 1fr); }
  .canvas9 .blk { grid-column: span 2 !important; grid-row: auto !important; }
  .kv { grid-template-columns: 1fr; }
}
@media print { #topbar, #footer { display: none; } }

/* ===== 总日程日历 ===== */
.cal-legend { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; align-items: center; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px; }
.cal-head { text-align: center; font-size: 12px; color: var(--ink-2); padding: 3px 0; border-bottom: 1px solid var(--line); }
.cal-cell {
  min-height: 64px; border: 1px solid var(--line); border-radius: 6px; padding: 3px 4px;
  background: #fff; position: relative; font-size: 11px; cursor: default;
  overflow: hidden; max-height: 78px;
}
.cal-cell.empty { background: transparent; border-color: transparent; }
.cal-cell.has-ev { cursor: pointer; }
.cal-cell.has-ev:hover { border-color: var(--accent); box-shadow: 0 1px 6px rgba(15,107,95,.18); }
.cal-cell.today { border: 2px solid var(--accent); }
.cal-cell.today .cal-num { background: var(--accent); color: #fff; border-radius: 50%; width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; }
.cal-num { font-weight: 600; color: var(--ink-2); margin-bottom: 2px; }
.cal-ev {
  background: var(--chip); border-radius: 4px; padding: 1px 4px; margin: 1px 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; cursor: pointer; font-size: 10.5px;
}
.cal-ev:hover { background: #e0e4e8; }
.cal-ev.cal-ss { background: #f4f2ec; color: #6b6660; }
.cal-tip {
  display: none; position: absolute; z-index: 200; width: 320px; max-width: 86vw;
  background: #10241f; color: #eef6f3; border-radius: 10px; padding: 10px 14px;
  box-shadow: 0 8px 28px rgba(10, 30, 25, .4); pointer-events: none; font-size: 13px;
}
.cal-tip .tip-head { font-weight: 700; margin-bottom: 6px; color: #ffd57a; }
.cal-tip .tip-row { padding: 7px 0; border-top: 1px solid rgba(255, 255, 255, .14); }
.cal-tip .tip-row:first-of-type { border-top: none; }
.cal-tip .tip-topic { margin: 3px 0 1px; font-weight: 600; }
.cal-tip .muted, .cal-tip .small { color: #b9cec7 !important; }
.cal-tip .chip { background: rgba(255, 255, 255, .12); color: #eef6f3; }
.cal-class-dot { position: absolute; right: 4px; top: 3px; font-size: 9px; color: #b8b2a5; }
.day-ev { background: #fbfaf7; border-radius: 6px; padding: 8px 12px; margin: 6px 0; }

.week-card { border-left: 4px solid var(--line); }
.week-card.current { border-left: 4px solid var(--accent); background: #f4faf8; }
.wk-topic { margin: 3px 0; font-size: 13.5px; }
.wk-actions { margin-top: 10px; }
.wk-action { display: flex; gap: 8px; align-items: flex-start; margin: 5px 0; font-size: 13.5px; cursor: pointer; }
.wk-action input { accent-color: var(--accent); margin-top: 3px; }
.wk-action.done span { text-decoration: line-through; color: var(--ink-2); }
@media (max-width: 860px) { .cal-cell { min-height: 46px; } .cal-ev { display: none; } .cal-cell.has-ev::after { content: "●"; position: absolute; bottom: 4px; left: 4px; color: var(--accent); font-size: 8px; } }

/* ===== 作业/测验总面板 ===== */
.assess-panel { border: 2px solid var(--accent); }
.as-row {
  display: flex; gap: 10px; align-items: center; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--line); margin: 6px 0; background: #fff;
}
.as-row.u14 { border-color: #d9b23c; background: #fdf9ec; }
.as-row.u7 { border-color: #d9843c; background: #fdf3ea; }
.as-row.u3 { border-color: #b3392f; background: #fdeeed; }
.as-row.overdue { border-color: #b3392f; background: #f9d9d6; }
.as-check input { width: 18px; height: 18px; accent-color: var(--ok); cursor: pointer; }
.as-main { flex: 1; min-width: 0; }
.as-count { font-weight: 700; white-space: nowrap; font-size: 13.5px; min-width: 76px; text-align: right; }
.as-count.u14 { color: #8a6d1a; } .as-count.u7 { color: #a4531f; }
.as-count.u3, .as-count.overdue { color: #b3392f; }
@media (max-width: 640px) { .as-row { flex-wrap: wrap; } .as-count { text-align: left; } }