:root {
  --primary: #1f5f8b;
  --primary-dark: #163f5c;
  --bg: #f5f6fa;
  --card-bg: #ffffff;
  --text: #2d3436;
  --text-light: #636e72;
  --border: #dfe6e9;
  --mild: #e8f6ee;
  --moderate: #fff6e0;
  --severe: #fdecea;
  --life: #f3dede;
  --new-bg: #eef5fb;
  --th-bg: #f0f3f5;
  --heading: #163f5c;
  --link: #1f5f8b;
  --border-strong: #b2bec3;
  /* 證據等級：同一色系，越深證據越強 */
  --ev-a-bg: #14406b; --ev-a-fg: #ffffff;
  --ev-b-bg: #2b6aa3; --ev-b-fg: #ffffff;
  --ev-c-bg: #8fb5dc; --ev-c-fg: #10304d;
  --ev-d-bg: #d3e4f4; --ev-d-fg: #10304d; --ev-d-bd: #8fb5dc;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #1e4f8f;
    --primary-dark: #14335c;
    --bg: #0a0f1e;
    --card-bg: #111827;
    --text: #e2e8f0;
    --text-light: #94a3b8;
    --border: #263244;
    --mild: #12301f;
    --moderate: #3a2d0c;
    --severe: #3b1a1a;
    --life: #4a1f24;
    --new-bg: #0f2238;
    --th-bg: #1a2436;
    --heading: #93c5fd;
    --link: #7cb7ff;
    --border-strong: #3b4a60;
    --ev-a-bg: #6db3f5; --ev-a-fg: #04192b;
    --ev-b-bg: #4a90d9; --ev-b-fg: #04192b;
    --ev-c-bg: #2c5d8f; --ev-c-fg: #eaf3fb;
    --ev-d-bg: #1d3a58; --ev-d-fg: #cfe1f3; --ev-d-bd: #3a5f86;
  }
}

:root[data-theme="dark"] {
  --primary: #1e4f8f;
  --primary-dark: #14335c;
  --bg: #0a0f1e;
  --card-bg: #111827;
  --text: #e2e8f0;
  --text-light: #94a3b8;
  --border: #263244;
  --mild: #12301f;
  --moderate: #3a2d0c;
  --severe: #3b1a1a;
  --life: #4a1f24;
  --new-bg: #0f2238;
  --th-bg: #1a2436;
  --heading: #93c5fd;
  --link: #7cb7ff;
  --border-strong: #3b4a60;
  --ev-a-bg: #6db3f5; --ev-a-fg: #04192b;
  --ev-b-bg: #4a90d9; --ev-b-fg: #04192b;
  --ev-c-bg: #2c5d8f; --ev-c-fg: #eaf3fb;
  --ev-d-bg: #1d3a58; --ev-d-fg: #cfe1f3; --ev-d-bd: #3a5f86;
  color-scheme: dark;
}
:root[data-theme="light"] { color-scheme: light; }

a { color: var(--link); }

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans TC', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
}

header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.header-inner {
  max-width: 900px;
  margin: auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.header-inner h1 { font-size: 22px; }
.header-inner span { font-size: 14px; opacity: 0.85; }
.header-inner a { color: rgba(255,255,255,0.9); text-decoration: none; font-size: 15px; }

main { max-width: 900px; margin: 24px auto; padding: 0 20px 60px; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 18px;
}
.card h2 { font-size: 19px; color: var(--heading); margin-bottom: 10px; }
.card h3 { font-size: 16px; margin: 16px 0 6px; }
.card ul { padding-left: 22px; }
.card li { margin: 4px 0; }
.card p { margin: 6px 0; }

.meta { font-size: 14px; color: var(--text-light); }
.meta b { color: var(--text); }
.badge {
  display: inline-block;
  font-size: 12px;
  padding: 1px 8px;
  border-radius: 10px;
  background: var(--primary);
  color: white;
  margin-right: 6px;
  vertical-align: 2px;
}
.badge.soon { background: var(--text-light); }

.topic-list a { text-decoration: none; color: inherit; display: block; }
.topic-list .card:hover { border-color: var(--primary); }
.topic-list .card.soon { opacity: 0.6; }

.diff { background: var(--new-bg); border-left: 4px solid var(--primary); }

table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 8px 0; }
th, td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--th-bg); width: 18%; }
td.mild, th.mild { background: var(--mild); }
td.moderate, th.moderate { background: var(--moderate); }
td.severe, th.severe { background: var(--severe); }
td.life, th.life { background: var(--life); }
.table-wrap { overflow-x: auto; }

details { margin: 6px 0; }
summary { cursor: pointer; font-weight: 600; color: var(--heading); }

.note { font-size: 13px; color: var(--text-light); margin-top: 8px; }
footer { text-align: center; font-size: 13px; color: var(--text-light); padding: 20px; }

/* 證據等級標籤 */
.ev {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 0 7px;
  border-radius: 4px;
  white-space: nowrap;
  vertical-align: 1px;
}
.ev-a { background: var(--ev-a-bg); color: var(--ev-a-fg); }
.ev-b { background: var(--ev-b-bg); color: var(--ev-b-fg); }
.ev-c { background: var(--ev-c-bg); color: var(--ev-c-fg); }
.ev-d { background: var(--ev-d-bg); color: var(--ev-d-fg); border: 1px solid var(--ev-d-bd); }
.ev-n { background: var(--card-bg); color: var(--text-light); border: 1px solid var(--border-strong); font-weight: 500; }
.pg { font-size: 12px; color: var(--text-light); white-space: nowrap; }
.legend { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 13.5px; margin-top: 8px; }
.legend div { display: flex; align-items: center; gap: 6px; }
.dl a { display: inline-block; margin: 4px 12px 4px 0; }

abbr[title] { text-decoration: underline dotted; text-underline-offset: 3px; cursor: help; }
.gloss dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; font-size: 14.5px; }
.gloss dt { font-weight: 700; color: var(--heading); }
.gloss dd { margin: 0; }
@media (max-width: 560px) { .gloss dl { grid-template-columns: 1fr; } .gloss dd { margin-bottom: 6px; } }

/* 頁籤（純 CSS） */
.tab-radio { position: absolute; opacity: 0; pointer-events: none; }
.tab-labels { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.tab-labels label {
  cursor: pointer; padding: 9px 18px; border-radius: 8px; font-weight: 600; font-size: 15px;
  background: var(--card-bg); border: 1px solid var(--border); color: var(--text-light);
}
.panel { display: none; }
#t1:checked ~ #p1, #t2:checked ~ #p2 { display: block; }
#t1:checked ~ .tab-labels label[for="t1"],
#t2:checked ~ .tab-labels label[for="t2"] { background: var(--primary); border-color: var(--primary); color: #fff; }
#t1:focus-visible ~ .tab-labels label[for="t1"],
#t2:focus-visible ~ .tab-labels label[for="t2"] { outline: 3px solid #f0b429; outline-offset: 2px; }

/* 配色切換按鈕 */
.hdr-right { display: flex; align-items: center; gap: 14px; }
.theme-btn {
  background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.4); color: #fff;
  border-radius: 8px; padding: 4px 11px; font-size: 13px; cursor: pointer; font-family: inherit;
}
.theme-btn:hover { background: rgba(255,255,255,0.28); }

/* AHA：建議強度（COR）與證據品質（LOE），沿用 AHA 官方配色 */
.cor, .loe { display: inline-block; font-size: 12px; font-weight: 700; padding: 1px 8px; border-radius: 4px; white-space: nowrap; }
.cor-1 { background: #7fc48a; color: #0e2a14; }
.cor-2a { background: #f8d766; color: #3a2d00; }
.cor-2b { background: #f4a259; color: #3a1f00; }
.cor-3n { background: #ef8080; color: #3a0a0a; }
.cor-3h { background: #a51c1c; color: #fff; }
.loe-a { background: #0f4f8f; color: #fff; }
.loe-br { background: #3f80b9; color: #fff; }
.loe-bnr { background: #6fa2cf; color: #0b2540; }
.loe-cld { background: #c3daef; color: #0b2540; }
.loe-ceo { background: #e3edf7; color: #0b2540; border: 1px solid #a9c3de; }
.rec { display: grid; grid-template-columns: 116px 1fr; gap: 6px 14px; padding: 10px 0; border-top: 1px solid var(--border); }
.rec:first-of-type { border-top: none; }
.rec-b { display: flex; flex-direction: column; gap: 4px; align-items: flex-start; }
.rec-t .n { font-weight: 700; color: var(--text-light); margin-right: 4px; }
@media (max-width: 560px) { .rec { grid-template-columns: 1fr; } .rec-b { flex-direction: row; flex-wrap: wrap; } }
.toc { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 14px; }
.fig { border-left: 4px solid var(--border-strong); padding-left: 12px; margin: 10px 0; font-size: 14.5px; }
.badge.fig-b { background: var(--text-light); }