/* ============================================================
   Kairos 檔案庫
   設計概念：一份公文，被研究者接管了。
   冷公文紙 + 印章紅。全站唯一的暖色是「從什麼需求出發」欄位——那是毛根。
   ============================================================ */

:root {
  --paper:   #f4f6f7;
  --card:    #ffffff;
  --ink:     #131a22;
  --ink-2:   #3d4a57;
  --muted:   #6d7c8a;
  --rule:    #d5dce2;
  --rule-2:  #e6eaee;
  --seal:    #a3281c;
  --seal-w:  #f7ecea;
  /* ⭐ 需求欄位 —— 整頁唯一的暖色。這是毛根 */
  --field:   #f2ede3;
  --field-b: #ddd0b6;
  --field-i: #4a3d24;

  --serif: "Noto Serif TC", "Source Han Serif TC", "Songti TC", "PMingLiU", serif;
  --sans:  "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", -apple-system, sans-serif;

  --wrap: 1080px;
  --read: 660px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:#10161c; --card:#161e26; --ink:#e7ecf0; --ink-2:#b3c0cc; --muted:#8695a3;
    --rule:#29333d; --rule-2:#1e262e; --seal:#e0644f; --seal-w:#2a1a17;
    --field:#1f1c15; --field-b:#453a24; --field-i:#e8dcc2;
  }
}
:root[data-theme="dark"] {
  --paper:#10161c; --card:#161e26; --ink:#e7ecf0; --ink-2:#b3c0cc; --muted:#8695a3;
  --rule:#29333d; --rule-2:#1e262e; --seal:#e0644f; --seal-w:#2a1a17;
  --field:#1f1c15; --field-b:#453a24; --field-i:#e8dcc2;
}
:root[data-theme="light"] {
  --paper:#f4f6f7; --card:#ffffff; --ink:#131a22; --ink-2:#3d4a57; --muted:#6d7c8a;
  --rule:#d5dce2; --rule-2:#e6eaee; --seal:#a3281c; --seal-w:#f7ecea;
  --field:#f2ede3; --field-b:#ddd0b6; --field-i:#4a3d24;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink-2);
  font-family: var(--sans); font-size: 16px; line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
.read { max-width: var(--read); }

h1, h2, h3 {
  font-family: var(--serif); color: var(--ink); font-weight: 700;
  line-height: 1.35; margin: 0; text-wrap: balance;
}
h1 { font-size: clamp(1.9rem, 4vw, 2.9rem); letter-spacing: .01em; }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1.15em; }
a { color: var(--seal); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--seal); outline-offset: 3px; }

.lbl {
  font-size: .68rem; font-weight: 700; letter-spacing: .18em;
  text-transform: uppercase; color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ---------- 頁首 ---------- */
.top { border-bottom: 1px solid var(--rule); background: var(--card); position: sticky; top: 0; z-index: 20; }
.top__in { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 62px; }
.logo { display: flex; align-items: baseline; gap: 10px; }
.logo b { font-family: var(--serif); font-size: 1.15rem; color: var(--ink); }
.logo span { font-size: .72rem; color: var(--muted); letter-spacing: .1em; }
.logo a { color: inherit; text-decoration: none; display: flex; align-items: baseline; gap: 10px; }
.nav { display: flex; gap: 4px; }
.nav a { font-size: .9rem; color: var(--ink-2); padding: 7px 13px; border-radius: 4px; }
.nav a:hover { background: var(--rule-2); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--seal); font-weight: 700; }

/* ---------- 案卷編號條 ---------- */
.filebar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 10px 0; border-bottom: 1px solid var(--rule); }
.fileno { font-family: var(--serif); font-size: 1.05rem; color: var(--seal); font-variant-numeric: tabular-nums; font-weight: 700; }
.stamp {
  font-size: .68rem; font-weight: 700; letter-spacing: .12em;
  border: 1px solid var(--seal); color: var(--seal); background: var(--seal-w);
  padding: 3px 9px; border-radius: 2px;
}
.stamp--desk { border-color: var(--muted); color: var(--muted); background: transparent; }

/* ---------- ⭐ 需求欄位：整頁唯一的暖色 ---------- */
.need { background: var(--field); border: 1px solid var(--field-b); border-radius: 3px; padding: 22px 26px; margin: 26px 0; }
.need .lbl { color: var(--field-i); opacity: .75; }
.need p { font-family: var(--serif); font-size: 1.24rem; line-height: 1.7; color: var(--field-i); margin: 8px 0 0; }

.built { border-left: 2px solid var(--rule); padding: 4px 0 4px 20px; margin: 26px 0; }
.built p { margin: 8px 0 0; color: var(--ink-2); }

/* ---------- 來源 ---------- */
.src { margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--rule); }
.src ol { margin: 10px 0 0; padding-left: 1.3em; }
.src li { font-size: .85rem; color: var(--muted); margin-bottom: 6px; word-break: break-word; }

/* ---------- 檔案卡 ---------- */
.cards { display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: 3px; }
.card {
  background: var(--card); padding: 26px 28px;
  display: grid; grid-template-columns: 62px 1fr; gap: 22px; align-items: start;
  transition: background .15s; text-decoration: none; color: inherit;
}
.card:hover { background: var(--seal-w); text-decoration: none; }
.card__no { font-family: var(--serif); font-size: 1.3rem; color: var(--seal); font-variant-numeric: tabular-nums; }
.card h3 { margin: 10px 0 8px; }
.card__meta { font-size: .9rem; color: var(--muted); margin: 0; }
.card__q {
  font-family: var(--serif); font-size: .98rem; color: var(--field-i);
  background: var(--field); border-left: 2px solid var(--field-b);
  padding: 8px 14px; margin: 10px 0 0;
}
.card--empty { grid-template-columns: 1fr; text-align: center; color: var(--muted); font-size: .9rem; padding: 44px 28px; }
.card--empty:hover { background: var(--card); }

/* ---------- 區塊 ---------- */
.sec { padding: 66px 0; }
.sec + .sec { border-top: 1px solid var(--rule); }
.sec__hd { margin-bottom: 30px; }
.sec__hd h2 { margin: 8px 0 0; }

/* ---------- 首頁 ---------- */
.hero { padding: 76px 0 60px; }
.hero .greek { font-family: var(--serif); font-size: .85rem; color: var(--muted); letter-spacing: .06em; margin-bottom: 18px; }
.hero h1 { margin-bottom: 22px; }
.hero__sub { font-size: 1.14rem; color: var(--ink-2); max-width: 46ch; }
.thesis {
  font-family: var(--serif); font-size: clamp(1.3rem, 2.4vw, 1.6rem); line-height: 1.6;
  color: var(--ink); border-left: 3px solid var(--seal); padding-left: 24px; margin: 40px 0 0;
}

/* ---------- 數據列 ---------- */
.figs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: 3px; margin-top: 44px; }
.fig { background: var(--card); padding: 22px 24px; }
.fig b { display: block; font-family: var(--serif); font-size: 2rem; color: var(--ink); font-variant-numeric: tabular-nums; line-height: 1.1; margin-bottom: 6px; }
.fig span { font-size: .84rem; color: var(--muted); }
.fig--seal b { color: var(--seal); }

/* ---------- 為什麼是我 ---------- */
.why { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: 3px; }
.why > div { background: var(--card); padding: 26px 28px; }
.why h3 { margin-bottom: 8px; font-size: 1.05rem; }
.why p { font-size: .93rem; margin: 0; color: var(--muted); }

/* ---------- 提名／CTA ---------- */
.nom { background: var(--card); border: 1px solid var(--rule); border-radius: 3px; padding: 38px 34px; }
.nom h2 { margin-bottom: 10px; }
.nom p { color: var(--muted); max-width: 52ch; }
.btn {
  display: inline-block; font-family: inherit; font-size: .95rem; font-weight: 700;
  background: var(--seal); color: #fff; border: 0; border-radius: 3px;
  padding: 12px 26px; cursor: pointer; margin-top: 8px;
}
.btn:hover { opacity: .88; text-decoration: none; color: #fff; }

/* ---------- 頁尾 ---------- */
.foot { border-top: 1px solid var(--rule); padding: 30px 0; margin-top: 20px; }
.foot p { font-size: .8rem; color: var(--muted); margin: 0; }

.warn { background: var(--seal-w); border: 1px solid var(--seal); border-radius: 3px; padding: 14px 20px; margin: 22px 0; font-size: .88rem; color: var(--ink-2); }
.warn b { color: var(--seal); }

article p { max-width: var(--read); }
article h2 { margin: 2em 0 .7em; }
article strong { color: var(--ink); }

.divider { border: 0; border-top: 1px solid var(--rule); margin: 40px 0; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 8px; top: 8px; background: var(--card); padding: 10px 16px; z-index: 100; }

@media (max-width: 720px) {
  .figs, .why { grid-template-columns: 1fr; }
  .card { grid-template-columns: 1fr; gap: 10px; }
  .nav a { padding: 7px 9px; font-size: .82rem; }
  .top__in { flex-direction: column; align-items: flex-start; padding: 12px 0; }
  .sec { padding: 48px 0; }
  .hero { padding: 48px 0 40px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }