/* markdown-tech-zh-tw 網站樣式 — Markdown 繁中教學站（深色 × 霓虹，承襲 open-code-review-zh-tw / markitdown-zh-tw 設計語言） */

:root {
  --bg: #0d0d13;
  --bg-soft: #12121a;
  --surface: #17171f;
  --surface-2: #1f1f2a;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #eceaf4;
  --text-soft: #a3a1b6;
  --text-muted: #6e6c80;
  --cyan: #22d3ee;
  --fuchsia: #e879f9;
  --amber: #fbbf24;
  --emerald: #34d399;
  --orange: #fb923c;
  --violet: #a78bfa;
  --grad-main: linear-gradient(90deg, #22d3ee, #e879f9);
  --font-zh: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-display: "Space Grotesk", "Noto Sans TC", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background:
    radial-gradient(1100px 560px at 50% -220px, rgba(34, 211, 238, 0.09), transparent 60%),
    radial-gradient(900px 520px at 88% 6%, rgba(232, 121, 249, 0.07), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-zh);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding: 2.2rem 1rem 3rem;
}

.container { max-width: 1080px; margin: 0 auto; }

a { color: var(--cyan); text-decoration: none; border-bottom: 1px dotted rgba(34, 211, 238, 0.4); }
a:hover { color: #7be7fb; border-bottom-color: var(--cyan); }
a.entry-card, a.card, a.case-card, a.cm-node, a.about-card, a.next-prev { border-bottom: none; }
a.entry-card:hover, a.card:hover, a.case-card:hover, a.cm-node:hover { border-bottom: none; }

::selection { background: rgba(34, 211, 238, 0.28); }

/* ---------- Header ---------- */
header { text-align: center; margin-bottom: 1.6rem; }
h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
  color: #f0f2ff;
  text-shadow: 0 0 30px rgba(34, 211, 238, 0.25);
}
.subtitle { font-size: 0.92rem; color: var(--text-soft); margin-top: 0.5rem; }
.badge-line { margin-top: 0.7rem; font-size: 0.76rem; color: var(--text-muted); }
.tagline {
  max-width: 760px;
  margin: 0.9rem auto 0;
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.8;
}

/* ---------- Nav ---------- */
.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem 0.8rem;
  margin: 0.4rem 0 2rem;
  font-size: 0.8rem;
}
.topnav a {
  color: var(--text-soft);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.2rem 0.8rem;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.14s, border-color 0.14s;
}
.topnav a:hover { color: var(--cyan); border-color: var(--cyan); }

/* ---------- Back link ---------- */
.back-link { margin-bottom: 1.2rem; font-size: 0.85rem; }
.back-link a { border-bottom: none; margin-right: 0.9rem; color: var(--text-soft); }
.back-link a:hover { color: var(--cyan); }

/* ---------- Entry cards (index) ---------- */
.entry-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.2rem; max-width: 980px; margin: 0 auto; }
.entry-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  padding: 1.6rem 1.4rem 1.4rem;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  text-align: center;
}
.entry-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-main);
  opacity: 0;
  transition: opacity 0.15s;
}
.entry-card:hover { transform: translateY(-4px); border-color: var(--cyan); box-shadow: 0 14px 44px rgba(34, 211, 238, 0.14); }
.entry-card:hover::before { opacity: 1; }
.entry-card .ec-icon { font-size: 1.6rem; margin-bottom: 0.55rem; }
.entry-card .ec-title { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; color: #f0f2ff; }
.entry-card .ec-en { font-size: 0.64rem; color: var(--text-muted); margin-top: 0.22rem; letter-spacing: 0.08em; text-transform: uppercase; }
.entry-card .ec-desc { font-size: 0.8rem; color: var(--text-soft); margin-top: 0.7rem; line-height: 1.7; }
.entry-card .ec-pill { margin-top: 0.6rem; }
.entry-card .ec-pill .c-tag { font-size: 0.6rem; background: rgba(255,255,255,0.04); border: 1px solid var(--line); color: var(--text-muted); border-radius: 999px; padding: 0.05rem 0.5rem; }

/* ---------- Guide / doc pages ---------- */
.guide h2 { color: #f0f2ff; font-family: var(--font-display); font-size: 1.25rem; margin: 2.2rem 0 0.55rem; padding-top: 0.4rem; }
.guide h3 { color: #e6f7fb; font-family: var(--font-display); font-size: 1.02rem; margin: 1.5rem 0 0.4rem; }
.guide h4 { color: #e6f7fb; font-family: var(--font-display); font-size: 0.92rem; margin: 1.1rem 0 0.3rem; }
.guide p { margin: 0.45rem 0; color: var(--text-soft); }
.guide ul, .guide ol { margin: 0.35rem 0 0.5rem 1.4rem; color: var(--text-soft); }
.guide li { margin: 0.28rem 0; }
.guide strong { color: #f0f2ff; }
.guide .hint { font-size: 0.74rem; color: var(--text-muted); }
.guide a { color: var(--cyan); }

.guide pre {
  background: #0b0b11;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  margin: 0.55rem 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: #e2e8f0;
}
.guide :not(pre) > code {
  background: rgba(34, 211, 238, 0.12);
  color: #7dd3e0;
  padding: 0.06rem 0.34rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}
.guide blockquote {
  border-left: 3px solid var(--amber);
  padding-left: 0.9rem;
  margin: 0.55rem 0;
  color: var(--text-soft);
  font-size: 0.86rem;
  opacity: 0.9;
}
.guide table { border-collapse: collapse; width: 100%; margin: 0.6rem 0; font-size: 0.83rem; }
.guide th { background: var(--surface-2); color: #f0f2ff; }
.guide th, .guide td { border: 1px solid var(--line-strong); padding: 0.4rem 0.65rem; text-align: left; vertical-align: top; }
.guide hr { border: none; border-top: 1px solid var(--line-strong); margin: 1rem 0; }

/* ---------- Callouts ---------- */
.callout {
  border: 1px solid rgba(52, 211, 153, 0.35);
  border-left: 3px solid var(--emerald);
  background: rgba(52, 211, 153, 0.07);
  border-radius: 10px;
  padding: 0.8rem 1rem;
  margin: 1.1rem 0;
  font-size: 0.85rem;
  color: var(--text-soft);
  line-height: 1.7;
}
.callout strong { color: #c8f5df; }
.callout.warn { border-color: rgba(251, 191, 36, 0.35); border-left-color: var(--amber); background: rgba(251, 191, 36, 0.06); }
.callout.warn strong { color: #fdeab9; }
.callout.info { border-color: rgba(34, 211, 238, 0.35); border-left-color: var(--cyan); background: rgba(34, 211, 238, 0.06); }
.callout.info strong { color: #a5f3fc; }

/* ---------- 學習成果 ---------- */
.outcome {
  border: 1px solid rgba(167, 139, 250, 0.35);
  border-left: 3px solid var(--violet);
  background: rgba(167, 139, 250, 0.06);
  border-radius: 10px;
  padding: 0.8rem 1rem;
  margin: 1.2rem 0;
  font-size: 0.85rem;
  color: var(--text-soft);
  line-height: 1.75;
}
.outcome strong { color: #ddd3ff; }
.outcome ul { margin: 0.3rem 0 0 1.3rem; }

/* ---------- Bilingual pairs ---------- */
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin: 0.6rem 0; }
.col-en { padding-right: 1.8rem; border-right: 1px solid var(--line); font-size: 0.9rem; color: #cfcdda; }
.col-zh { padding-left: 1.8rem; line-height: 1.85; }
.col-en h1, .col-zh h1, .col-en h2, .col-zh h2, .col-en h3, .col-zh h3, .col-en h4, .col-zh h4 { margin: 0.55rem 0 0.3rem; color: #f0f2ff; line-height: 1.3; font-family: var(--font-display); }
.col-en h1, .col-zh h1 { font-size: 1.3rem; margin: 0.4rem 0 0.3rem; }
.col-en h2, .col-zh h2 { font-size: 1.12rem; }
.col-en h3, .col-zh h3 { font-size: 0.98rem; }
.col-en p, .col-zh p { margin: 0.35rem 0; }
.col-en ul, .col-zh ul, .col-en ol, .col-zh ol { margin: 0.3rem 0 0.3rem 1.3rem; }
.col-en li, .col-zh li { margin: 0.15rem 0; }
.col-en blockquote, .col-zh blockquote { border-left: 3px solid var(--cyan); padding-left: 0.9rem; margin: 0.4rem 0; color: var(--text-soft); font-style: italic; opacity: 0.85; }
.col-en pre, .col-zh pre { background: #0b0b11; border: 1px solid var(--line); border-radius: 8px; padding: 0.7rem 0.95rem; margin: 0.5rem 0; overflow-x: auto; font-family: var(--font-mono); font-size: 0.78rem; line-height: 1.55; color: #e2e8f0; }
.col-en :not(pre) > code, .col-zh :not(pre) > code { background: rgba(34, 211, 238, 0.12); color: #7dd3e0; padding: 0.08rem 0.3rem; border-radius: 4px; font-family: var(--font-mono); font-size: 0.86em; }
.col-en table, .col-zh table { border-collapse: collapse; margin: 0.4rem 0; font-size: 0.82rem; width: 100%; }
.col-en th, .col-zh th { background: var(--surface-2); color: #f0f2ff; }
.col-en th, .col-en td, .col-zh th, .col-zh td { border: 1px solid var(--line-strong); padding: 0.3rem 0.55rem; text-align: left; vertical-align: top; }

/* ---------- 語法示範：來源 / 渲染 對照 ---------- */
.demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 0.7rem 0; }
.demo-block { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--surface); }
.demo-block > .demo-label { font-size: 0.66rem; color: var(--text-muted); padding: 0.3rem 0.8rem; border-bottom: 1px solid var(--line); background: var(--surface-2); letter-spacing: 0.06em; }
.demo-block > pre { background: #0b0b11; border: none; border-radius: 0; margin: 0; padding: 0.7rem 0.9rem; font-size: 0.76rem; }
.demo-block > .demo-render { padding: 0.7rem 0.9rem; font-size: 0.85rem; color: var(--text); line-height: 1.7; }
.demo-block > .demo-render code { background: rgba(34, 211, 238, 0.12); color: #7dd3e0; padding: 0.06rem 0.3rem; border-radius: 4px; font-family: var(--font-mono); font-size: 0.85em; }
.demo-block > .demo-render table { border-collapse: collapse; font-size: 0.78rem; }
.demo-block > .demo-render th, .demo-block > .demo-render td { border: 1px solid var(--line-strong); padding: 0.25rem 0.5rem; }
.demo-block > .demo-render th { background: var(--surface-2); }

/* ---------- English原文摺疊 ---------- */
details.en-toggle { margin: 0.7rem 0; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
details.en-toggle > summary { cursor: pointer; padding: 0.5rem 0.9rem; color: var(--text-soft); font-size: 0.78rem; list-style: none; }
details.en-toggle > summary::before { content: "▸ "; color: var(--cyan); }
details.en-toggle[open] > summary::before { content: "▾ "; }
details.en-toggle > summary:hover { color: var(--cyan); }
details.en-toggle > div { padding: 0 0.9rem 0.9rem; }

/* ---------- 概念地圖（map.html） ---------- */
.concept-map { display: flex; flex-direction: column; align-items: center; gap: 1.4rem; margin: 1.6rem 0; }
.cm-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.7rem; }
.cm-node {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--cyan);
  border-radius: 12px;
  padding: 0.55rem 0.9rem;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.14s, box-shadow 0.14s, border-color 0.14s;
  text-align: center;
  min-width: 120px;
}
.cm-node:hover { transform: translateY(-3px); border-color: var(--cyan); box-shadow: 0 6px 24px rgba(34, 211, 238, 0.18); }
.cm-node .label { font-family: var(--font-display); font-size: 0.85rem; font-weight: 600; color: #e6f7fb; }
.cm-node .tag { font-size: 0.7rem; color: var(--text-soft); margin-top: 0.2rem; line-height: 1.5; max-width: 240px; }
.cm-node .pill { font-size: 0.56rem; color: var(--text-muted); border: 1px solid var(--line); border-radius: 999px; padding: 0.04rem 0.5rem; margin-top: 0.3rem; }
.cm-node.on-ramp { border-left-color: var(--amber); }
.cm-node.on-ramp .label { color: #fdeab9; }
.cm-node.service { border-left-color: var(--emerald); }
.cm-node.service .label { color: #b8f0d8; }
.cm-node.standalone { border-left-color: var(--violet); }
.cm-node.standalone .label { color: #ddd3ff; }
.cm-node.meta { border-left-color: var(--fuchsia); }
.cm-node.meta .label { color: #f7d5fb; }
.cm-arrow { font-size: 1.1rem; color: var(--text-muted); }
.cm-caption { font-size: 0.72rem; color: var(--text-muted); text-align: center; }

/* ---------- 學習路線 ---------- */
.level { position: relative; padding-left: 32px; margin-bottom: 2.2rem; }
.level::before { content: ""; position: absolute; left: 9px; top: 10px; bottom: 10px; width: 2px; background: linear-gradient(180deg, var(--lv, var(--cyan)), transparent); opacity: 0.6; }
.level::after { content: ""; position: absolute; left: 1px; top: 8px; width: 18px; height: 18px; border-radius: 50%; background: var(--lv, var(--cyan)); box-shadow: 0 0 16px var(--lv, var(--cyan)); border: 4px solid var(--bg); }
.lv-emerald { --lv: #34d399; }
.lv-cyan { --lv: #22d3ee; }
.lv-amber { --lv: #fbbf24; }
.lv-fuchsia { --lv: #e879f9; }
.lv-violet { --lv: #a78bfa; }
.level-head { display: flex; align-items: baseline; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 1rem; }
.level-badge { color: var(--lv, var(--cyan)); border: 1px solid var(--lv, var(--cyan)); background: rgba(255,255,255,0.03); border-radius: 6px; font-family: var(--font-display); font-size: 0.72rem; font-weight: 600; padding: 0.1rem 0.6rem; letter-spacing: 0.06em; white-space: nowrap; }
.level-title { font-family: var(--font-display); font-size: 1.1rem; color: #f0f2ff; font-weight: 600; }
.level-sub { font-size: 0.78rem; color: var(--text-soft); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 0.9rem; }
.card { background: var(--surface); border: 1px solid var(--line-strong); border-left: 3px solid var(--lv, var(--cyan)); border-radius: 14px; padding: 0.85rem 1rem; display: flex; flex-direction: column; text-decoration: none; color: var(--text); transition: transform 0.14s, box-shadow 0.14s, border-color 0.14s; }
.card:hover { transform: translateY(-3px); border-color: var(--lv, var(--cyan)); box-shadow: 0 8px 28px rgba(34, 211, 238, 0.14); }
.card .c-name { font-family: var(--font-display); font-size: 0.92rem; font-weight: 600; color: #e6f7fb; }
.card .c-zh { font-size: 0.78rem; color: var(--text-soft); margin-top: 0.35rem; line-height: 1.55; }
.card .c-tags { margin-top: 0.5rem; display: flex; gap: 0.35rem; flex-wrap: wrap; }
.card .c-tag { font-size: 0.6rem; background: rgba(255,255,255,0.04); border: 1px solid var(--line); color: var(--text-muted); border-radius: 999px; padding: 0.06rem 0.5rem; }

/* ---------- 單元導覽（prev / next） ---------- */
.next-prev { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 2.4rem 0 0.4rem; }
.next-prev a {
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--cyan);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.14s, box-shadow 0.14s;
}
.next-prev a:hover { transform: translateY(-2px); border-color: var(--cyan); box-shadow: 0 8px 24px rgba(34, 211, 238, 0.14); }
.next-prev a .np-label { font-size: 0.64rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; }
.next-prev a .np-name { font-family: var(--font-display); font-size: 0.9rem; color: #e6f7fb; margin-top: 0.2rem; }
.next-prev a.np-next { text-align: right; border-left: none; border-right: 3px solid var(--fuchsia); }
.next-prev a.np-next:hover { border-color: var(--fuchsia); box-shadow: 0 8px 24px rgba(232, 121, 249, 0.16); }

/* ---------- 檔案清單 ---------- */
.file-tree { font-family: var(--font-mono); font-size: 0.78rem; background: #0b0b11; border: 1px solid var(--line); border-radius: 8px; padding: 0.8rem 1rem; margin: 0.6rem 0; overflow-x: auto; line-height: 1.7; color: #a3a1b6; white-space: pre; }
.file-tree .dir { color: var(--fuchsia); }
.file-tree .f { color: #e2e8f0; }

/* ---------- 授權宣告 ---------- */
.license-box { border: 1px solid var(--line-strong); border-left: 3px solid var(--amber); border-radius: 10px; background: rgba(251, 191, 36, 0.04); padding: 0.9rem 1.1rem; margin: 1.2rem 0; font-size: 0.82rem; color: var(--text-soft); line-height: 1.8; }
.license-box strong { color: #fdeab9; }

/* ---------- 授權 / About ---------- */
.timeline { list-style: none; counter-reset: tl; margin: 0.6rem 0 0.6rem 10px; padding: 0; }
.timeline li { counter-increment: tl; position: relative; padding: 0 0 1.1rem 1.9rem; border-left: 2px solid var(--line-strong); color: var(--text-soft); font-size: 0.85rem; line-height: 1.7; }
.timeline li:last-child { padding-bottom: 0.2rem; border-left-color: transparent; }
.timeline li::before { content: counter(tl); position: absolute; left: -13px; top: 0; width: 24px; height: 24px; border-radius: 50%; background: var(--surface-2); border: 1px solid var(--cyan); color: var(--cyan); font-family: var(--font-display); font-size: 0.72rem; display: flex; align-items: center; justify-content: center; }

/* ---------- Footer ---------- */
footer { margin-top: 3.2rem; padding-top: 1.2rem; border-top: 1px solid var(--line); text-align: center; font-size: 0.72rem; color: var(--text-muted); line-height: 2.1; }
footer a { color: var(--text-soft); }
.footer-license { max-width: 860px; margin: 0.8rem auto 0; font-size: 0.7rem; color: var(--text-muted); }

/* ---------- Responsive ---------- */
@media (max-width: 800px) {
  .pair { grid-template-columns: 1fr; }
  .col-en { border-right: none; border-bottom: 1px solid var(--line); padding: 0.3rem 0; margin-bottom: 0.3rem; }
  .col-zh { padding: 0.3rem 0; }
  .demo-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  body { padding: 1.5rem 0.75rem 2rem; }
  h1 { font-size: 1.6rem; }
  .entry-cards { grid-template-columns: 1fr; }
  .next-prev { grid-template-columns: 1fr; }
  .next-prev a.np-next { text-align: left; border-left: 3px solid var(--fuchsia); border-right: none; }
}