/* 數海 — D5 儀表板粗獷主義：深色儀表板＋等寬數字＋單一琥珀金 */
:root {
  --bg: #0b0d10;
  --panel: #12151a;
  --panel2: #171b21;
  --line: #23282f;
  --text: #e8e6e1;
  --muted: #8a8f98;
  --accent: #e8b33d;
  --accent-dim: rgba(232, 179, 61, .14);
  --green: #3fb950;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --serif: "Songti TC", "Noto Serif TC", "PMingLiU", serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  line-height: 1.7;
}
a { color: var(--accent); }

/* 頂欄 */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 13, 16, .92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1200px; margin: 0 auto; padding: .7rem 1.2rem;
  display: flex; align-items: center; gap: 1.2rem;
}
.brand { display: flex; align-items: center; gap: .5rem; text-decoration: none; color: var(--text); }
.brand-mark {
  width: 2rem; height: 2rem; display: grid; place-items: center;
  background: var(--accent); color: #111; font-family: var(--serif);
  font-size: 1.2rem; font-weight: 700; border-radius: 4px;
}
.brand-name { font-weight: 700; letter-spacing: .2em; }
.search-wrap { flex: 1; max-width: 420px; }
#search {
  width: 100%; padding: .55rem .9rem; border-radius: 6px;
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  font-size: .95rem;
}
#search:focus { outline: none; border-color: var(--accent); }
.topnav { display: flex; gap: 1rem; margin-left: auto; }
.topnav a { color: var(--muted); text-decoration: none; font-size: .9rem; }
.topnav a:hover { color: var(--accent); }

main { max-width: 1200px; margin: 0 auto; padding: 0 1.2rem 4rem; }

/* Hero：D2 排印手法 */
.hero {
  display: grid; grid-template-columns: auto 1fr; gap: 2.5rem;
  align-items: center; padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--line);
}
.hero-glyph {
  font-family: var(--serif); font-size: clamp(8rem, 22vw, 15rem); line-height: 1;
  color: transparent; -webkit-text-stroke: 2px var(--accent);
  user-select: none;
}
.kicker { font-family: var(--mono); font-size: .75rem; letter-spacing: .3em; color: var(--muted); margin: 0 0 .5rem; }
.hero h1 { font-size: 3rem; margin: 0 0 .8rem; letter-spacing: .15em; }
.hero .sub { color: var(--muted); margin: 0 0 1.8rem; }
.stats { display: flex; gap: 2.2rem; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat .num { font-family: var(--mono); font-size: 2rem; font-weight: 700; }
.stat .num.accent { color: var(--accent); }
.stat .lbl { font-size: .8rem; color: var(--muted); }

/* 區塊標題 */
h2 { font-size: 1.3rem; margin: 3rem 0 1.2rem; display: flex; align-items: baseline; gap: .8rem; }
.sec-no { font-family: var(--mono); font-size: .85rem; color: var(--accent); }
.count { font-family: var(--mono); font-size: .9rem; color: var(--muted); }

/* 學科長條圖 */
.bars { display: grid; gap: .45rem; }
.bar-row { display: grid; grid-template-columns: 11rem 1fr 3rem; gap: .8rem; align-items: center; font-size: .85rem; }
.bar-row .name { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar-track { height: .55rem; background: var(--panel2); border-radius: 3px; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), #f5d67b); border-radius: 3px; }
.bar-row .n { font-family: var(--mono); text-align: right; }

/* 篩選 */
.filters { display: flex; flex-wrap: wrap; gap: .8rem; align-items: center; margin-bottom: 1.4rem; }
.chips { display: flex; flex-wrap: wrap; gap: .45rem; flex: 1; }
.chip {
  padding: .32rem .8rem; border: 1px solid var(--line); border-radius: 99px;
  background: transparent; color: var(--muted); font-size: .82rem; cursor: pointer;
}
.chip:hover { border-color: var(--accent); color: var(--text); }
.chip.on { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }
.lean-toggle { display: flex; align-items: center; gap: .45rem; font-size: .85rem; color: var(--muted); cursor: pointer; white-space: nowrap; }
.lean-toggle input { accent-color: var(--green); }

/* 卡片網格 L3 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  padding: 1.1rem 1.2rem; cursor: pointer; transition: transform .18s, border-color .18s;
  display: flex; flex-direction: column; gap: .55rem;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card-top { display: flex; align-items: center; gap: .5rem; }
.fid { font-family: var(--mono); font-size: .8rem; color: var(--accent); }
.tag {
  font-size: .72rem; padding: .1rem .55rem; border-radius: 99px;
  border: 1px solid var(--line); color: var(--muted);
}
.tag.lean { border-color: var(--green); color: var(--green); }
.card h3 { margin: 0; font-size: 1rem; line-height: 1.5; font-weight: 600; }
.card .zh { margin: 0; font-size: .88rem; color: var(--muted); flex: 1; }
.card .meta { font-family: var(--mono); font-size: .75rem; color: var(--muted); }
.empty { color: var(--muted); text-align: center; padding: 3rem 0; }

/* 詳細 dialog */
dialog {
  background: var(--panel); color: var(--text); border: 1px solid var(--line);
  border-radius: 12px; max-width: 720px; width: calc(100vw - 3rem); max-height: 85vh;
  padding: 0;
}
dialog::backdrop { background: rgba(0, 0, 0, .7); }
.dlg-head { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.4rem; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--panel); }
.dlg-id { font-family: var(--mono); color: var(--accent); }
.dlg-close { background: none; border: none; color: var(--muted); font-size: 1.1rem; cursor: pointer; }
.dlg-close:hover { color: var(--text); }
dialog h3 { padding: 0 1.4rem; margin: 1.2rem 0 .6rem; font-size: 1.25rem; }
dialog h4 { padding: 0 1.4rem; margin: 1.4rem 0 .5rem; font-size: .95rem; color: var(--accent); }
.dlg-tags { padding: 0 1.4rem; display: flex; gap: .5rem; flex-wrap: wrap; }
.dlg-zh { padding: 0 1.4rem; background: var(--accent-dim); border-left: 3px solid var(--accent); margin: 1rem 1.4rem 0; padding: .8rem 1rem; border-radius: 0 6px 6px 0; font-size: .95rem; }
.dlg-desc { padding: 0 1.4rem; color: var(--muted); font-size: .92rem; }
#d-papers { padding: 0 1.4rem 1.6rem; display: grid; gap: .9rem; }
.paper { background: var(--panel2); border: 1px solid var(--line); border-radius: 8px; padding: .9rem 1rem; }
.paper-title { font-weight: 600; font-size: .92rem; margin-bottom: .3rem; }
.paper-title a { margin-left: .6rem; font-size: .8rem; font-family: var(--mono); }
.paper-abs { font-size: .85rem; color: var(--muted); margin: 0; }

/* 關於 */
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }
.about-grid > div { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 1.2rem 1.3rem; }
.about-grid h3 { margin: 0 0 .5rem; font-size: 1rem; color: var(--accent); }
.about-grid p { margin: 0; font-size: .9rem; color: var(--muted); }

footer { border-top: 1px solid var(--line); padding: 1.6rem 1.2rem; text-align: center; color: var(--muted); font-size: .8rem; }

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; gap: 1rem; padding: 2.5rem 0; }
  .hero-glyph { font-size: 6rem; }
  .topnav { display: none; }
  .bar-row { grid-template-columns: 7rem 1fr 2.5rem; }
}