/* =========================================
   1. Design Tokens (科技感 / 終端控制台風格)
   ========================================= */
:root {
  /* 科技感亮色系：實驗室高精密儀器風格 */
  --bg: #f4f7fa; --bg2: #e6edf5; --bg3: #d8e4f0;
  --text: #0b1520; --text2: #465a73; --text3: #78909c;
  --border: #b0bec5; --brand: #0066cc; --brand-bg: rgba(0, 102, 204, 0.08);
  --code-bg: #e9eff5; --shadow: 0 0 10px rgba(0, 102, 204, 0.15);
  --header-h: 60px; --toc-w: 260px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* 科技感深色系：全息大螢幕與深空終端控制台風格 */
    --bg: #050811; --bg2: #0b1122; --bg3: #121b34;
    --text: #c5d6e6; --text2: #708aa4; --text3: #42556a;
    --border: #1a2f4c; --brand: #00f0ff; --brand-bg: rgba(0, 240, 255, 0.12);
    --code-bg: #02050c; --shadow: 0 0 15px rgba(0, 240, 255, 0.3);
  }
  html:not([data-theme="light"]) .alert-info    { background: rgba(0, 240, 255, 0.08); color: #00f0ff; border-color: #00f0ff; }
  html:not([data-theme="light"]) .alert-warning { background: rgba(255, 170, 0, 0.08); color: #ffaa00; border-color: #ffaa00; }
  html:not([data-theme="light"]) .alert-danger  { background: rgba(255, 0, 85, 0.08); color: #ff0055; border-color: #ff0055; }
}

/* Manual Override */
html[data-theme="light"] {
  --bg: #f4f7fa; --bg2: #e6edf5; --bg3: #d8e4f0;
  --text: #0b1520; --text2: #465a73; --text3: #78909c;
  --border: #b0bec5; --brand: #0066cc; --brand-bg: rgba(0, 102, 204, 0.08);
  --code-bg: #e9eff5; --shadow: 0 0 10px rgba(0, 102, 204, 0.15);
}
html[data-theme="dark"] {
  --bg: #050811; --bg2: #0b1122; --bg3: #121b34;
  --text: #c5d6e6; --text2: #708aa4; --text3: #42556a;
  --border: #1a2f4c; --brand: #00f0ff; --brand-bg: rgba(0, 240, 255, 0.12);
  --code-bg: #02050c; --shadow: 0 0 15px rgba(0, 240, 255, 0.3);
}

/* =========================================
   2. Reset & Base
   ========================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "JetBrains Mono", "Fira Code", -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
  background: var(--bg); color: var(--text);
  line-height: 1.6; font-size: 16px;
  -webkit-font-smoothing: antialiased;
  position: relative; min-height: 100vh;
}

/* 科技感微弱背景網格線 */
body::before {
  content: ""; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background-image: linear-gradient(rgba(18, 27, 52, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(18, 27, 52, 0.03) 1px, transparent 1px);
  background-size: 20px 20px; pointer-events: none; z-index: -1;
}
html[data-theme="dark"] body::before {
  background-image: linear-gradient(rgba(0, 240, 255, 0.015) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 240, 255, 0.015) 1px, transparent 1px);
}

a { color: var(--brand); text-decoration: none; transition: all 0.2s; }
a:hover { text-shadow: 0 0 8px var(--brand); text-decoration: none; }
h1, h2, h3 { line-height: 1.3; margin-top: 2em; margin-bottom: 0.8em; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; }
h1 { font-size: 2rem; border-bottom: 2px dashed var(--border); padding-bottom: 0.4em; position: relative; }
h2 { font-size: 1.5rem; border-bottom: 1px dashed var(--border); padding-bottom: 0.3em; }
h3 { font-size: 1.2rem; }
p { margin-bottom: 1em; color: var(--text); }
ul, ol { margin-bottom: 1em; padding-left: 1.5em; }
code {
  font-family: "JetBrains Mono", "Fira Code", monospace;
  background: var(--code-bg); padding: 0.2em 0.4em; border-radius: 2px; font-size: 0.9em;
  border: 1px solid var(--border); color: var(--brand);
}

/* =========================================
   3. Header & Theme Toggle
   ========================================= */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h); background: rgba(5, 8, 17, 0.85);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--border);
  display: flex; align-items: center;
}
html[data-theme="light"] .site-header { background: rgba(244, 247, 250, 0.85); }
.header-inner {
  width: 100%; max-width: 1400px; margin: 0 auto;
  padding: 0 24px; display: flex; align-items: center; gap: 16px;
}
.toc-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--text); cursor: pointer; }
.breadcrumb { font-size: 14px; color: var(--text2); flex: 1; font-family: "JetBrains Mono", monospace; }
.breadcrumb a { color: var(--text2); }
.breadcrumb a:hover { color: var(--brand); text-shadow: 0 0 5px var(--brand); }
.bc-sep { margin: 0 8px; color: var(--brand); }
.theme-toggle {
  background: var(--bg); border: 1px solid var(--border); border-radius: 4px;
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--text2); transition: all 0.2s; box-shadow: var(--shadow);
}
.theme-toggle:hover { background: var(--brand-bg); color: var(--brand); border-color: var(--brand); transform: scale(1.05); }

/* =========================================
   4. Layout & TOC
   ========================================= */
.page-layout { display: grid; grid-template-columns: var(--toc-w) 1fr; max-width: 1400px; margin: 0 auto; }
.toc-nav {
  position: sticky; top: var(--header-h); height: calc(100vh - var(--header-h));
  overflow-y: auto; padding: 24px 16px; border-right: 1px solid var(--border);
  scrollbar-width: thin; scrollbar-color: var(--border) transparent; background: var(--bg);
}
.toc-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.toc-title { font-weight: 700; font-size: 13px; color: var(--brand); text-transform: uppercase; letter-spacing: 0.1em; font-family: "JetBrains Mono", monospace; }
.toc-close { display: none; background: none; border: none; font-size: 20px; color: var(--text2); cursor: pointer; }
.toc-search-hint { font-size: 11px; color: var(--text3); margin-bottom: 16px; font-family: "JetBrains Mono", monospace; }
.toc-list { list-style: none; }
.toc-item {
  display: block; padding: 6px 12px; margin: 4px 0; font-size: 14px; color: var(--text2); 
  border-radius: 2px; border-left: 2px solid transparent; transition: all 0.15s; text-decoration: none;
}
.toc-item:hover { color: var(--text); background: var(--bg3); border-left-color: var(--text3); text-decoration: none; }
.toc-item.active {
  color: var(--bg); background: var(--brand); border-left-color: var(--brand); font-weight: 600; box-shadow: 0 0 10px var(--brand);
}
html[data-theme="dark"] .toc-item.active { color: #000; }
.toc-overlay { display: none; }

.main-content { padding: 32px 48px 64px; min-width: 0; max-width: 900px; }

/* =========================================
   5. Components (表格, 代碼塊, Alert)
   ========================================= */
.data-table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: 14px; overflow-x: auto; font-family: "JetBrains Mono", monospace; }
.data-table th, .data-table td { border: 1px solid var(--border); padding: 12px 14px; text-align: left; }
.data-table th { background: var(--bg3); font-weight: 700; color: var(--brand); text-transform: uppercase; letter-spacing: 0.05em; }
.data-table tr:nth-child(even) { background: var(--bg2); }
.data-table tr:hover { background: var(--brand-bg); }

.code-block {
  position: relative; background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 4px; margin: 1.5em 0; overflow: hidden; box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
}
.code-block::before {
  content: "SYSTEM LOG // TERMINAL"; display: block; background: var(--bg3);
  padding: 4px 16px; font-size: 10px; font-weight: 700; color: var(--text3);
  letter-spacing: 0.1em; border-bottom: 1px solid var(--border);
}
.code-block pre { padding: 16px; overflow-x: auto; margin: 0; font-size: 14px; line-height: 1.5; }
.code-block code { background: none; padding: 0; border: none; color: var(--text); }
.copy-btn {
  position: absolute; top: 32px; right: 8px; background: var(--bg2); border: 1px solid var(--border); 
  border-radius: 4px; padding: 4px 10px; font-size: 11px; color: var(--text2); cursor: pointer;
  opacity: 0; transition: opacity 0.2s, background 0.2s; font-family: "JetBrains Mono", monospace;
}
.code-block:hover .copy-btn { opacity: 1; }
.copy-btn:hover { background: var(--brand); color: var(--bg); box-shadow: 0 0 8px var(--brand); }
html[data-theme="dark"] .copy-btn:hover { color: #000; }

.alert {
  padding: 14px 18px; border-radius: 4px; margin: 1.5em 0;
  border: 1px solid var(--border); border-left: 6px solid; font-size: 14px;
  background: var(--bg2); box-shadow: var(--shadow);
}
.alert-info { background: rgba(0, 102, 204, 0.05); border-color: #0066cc; color: #004499; }
.alert-warning { background: rgba(191, 135, 0, 0.05); border-color: #bf8700; color: #5c4100; }
.alert-danger { background: rgba(207, 34, 46, 0.05); border-color: #cf222e; color: #7a1118; }
html[data-theme="dark"] .alert-info { background: rgba(0, 240, 255, 0.08); color: #00f0ff; border-color: #00f0ff; }
html[data-theme="dark"] .alert-warning { background: rgba(255, 170, 0, 0.08); color: #ffaa00; border-color: #ffaa00; }
html[data-theme="dark"] .alert-danger { background: rgba(255, 0, 85, 0.08); color: #ff0055; border-color: #ff0055; }

.cross-link::after { content: " ↗"; font-size: 0.8em; vertical-align: super; color: var(--brand); }

/* =========================================
   6. Index Page (首頁卡片) & Footer
   ========================================= */
.hero-section { padding: 4rem 0 2rem; text-align: center; }
.hero-title { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: 1rem; border: none; color: var(--brand); text-shadow: 0 0 15px var(--brand-bg); }
.hero-desc { font-size: 1rem; color: var(--text2); max-width: 700px; margin: 0 auto; }

.guide-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; padding: 2rem 0 6rem; }
.guide-card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 4px;
  padding: 2rem; display: flex; flex-direction: column; gap: 1rem; 
  text-decoration: none; color: var(--text); transition: all 0.3s; box-shadow: var(--shadow); position: relative;
}
.guide-card:hover { border-color: var(--brand); transform: translateY(-4px); box-shadow: 0 0 20px var(--brand-bg); text-decoration: none; }
.card-header { display: flex; justify-content: space-between; align-items: center; }
.card-icon { font-size: 2rem; color: var(--brand); }
.card-tag { font-family: "JetBrains Mono", monospace; font-size: 0.75rem; color: var(--text3); text-transform: uppercase; }
.card-title { font-size: 1.2rem; font-weight: 700; margin: 0; border: none; text-transform: uppercase; letter-spacing: 0.05em; }
.card-desc { color: var(--text2); font-size: 0.9rem; flex: 1; margin: 0; }
.card-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--border); font-family: "JetBrains Mono", monospace; font-size: 0.8rem; color: var(--brand); }
.arrow { transition: transform 0.3s; }
.guide-card:hover .arrow { transform: translateX(8px); }

.page-footer {
  border-top: 2px solid var(--border); margin-top: 64px; padding: 24px 48px; 
  display: flex; justify-content: space-between; align-items: center; 
  font-size: 13px; color: var(--text3); flex-wrap: wrap; gap: 16px; font-family: "JetBrains Mono", monospace;
}
.footer-nav { display: flex; gap: 24px; }
.btn-top, .btn-home { color: var(--text2); text-transform: uppercase; letter-spacing: 0.05em; }
.btn-top:hover, .btn-home:hover { color: var(--brand); text-shadow: 0 0 5px var(--brand); text-decoration: none; }

/* =========================================
   7. RWD & Mobile Drawer
   ========================================= */
@media (max-width: 1024px) {
  .page-layout { grid-template-columns: 1fr; }
  .toc-toggle { display: block; }
  .toc-nav {
    position: fixed; top: 0; left: -280px; width: 280px; height: 100vh;
    background: var(--bg); z-index: 200; border-right: 2px solid var(--border);
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1); box-shadow: var(--shadow);
  }
  .toc-nav.open { left: 0; }
  .toc-close { display: block; }
  .toc-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(5, 8, 17, 0.6); backdrop-filter: blur(4px); z-index: 150; }
  .toc-overlay.open { display: block; }
  .main-content { padding: 24px 20px 64px; }
  .page-footer { padding: 24px 20px; }
}

@media (max-width: 640px) {
  .data-table thead { display: none; }
  .data-table, .data-table tbody, .data-table tr, .data-table td { display: block; width: 100%; }
  .data-table tr { border: 1px solid var(--border); border-radius: 4px; padding: 12px; margin-bottom: 16px; background: var(--bg2); box-shadow: var(--shadow); }
  .data-table td { border: none; padding: 6px 0; text-align: left; display: flex; justify-content: space-between; gap: 12px; border-bottom: 1px dashed rgba(120, 144, 156, 0.2); }
  .data-table td:last-child { border-bottom: none; }
  .data-table td::before { content: attr(data-label); font-weight: 700; color: var(--brand); flex-shrink: 0; text-transform: uppercase; font-size: 12px; }
}

/* 語義色與工具類 */
.c-ok   { color: #00ff66; text-shadow: 0 0 5px rgba(0,255,102,0.4); font-weight: 600; }
.c-warn { color: #ffaa00; text-shadow: 0 0 5px rgba(255,170,0,0.4); font-weight: 600; }
.c-err  { color: #ff0055; text-shadow: 0 0 5px rgba(255,0,85,0.4); font-weight: 600; }
.c-info { color: #00f0ff; text-shadow: 0 0 5px rgba(0,240,255,0.4); font-weight: 600; }
html[data-theme="light"] .c-ok   { color: #008833; text-shadow: none; }
html[data-theme="light"] .c-warn { color: #b87100; text-shadow: none; }
html[data-theme="light"] .c-err  { color: #cc0044; text-shadow: none; }
html[data-theme="light"] .c-info { color: #0066cc; text-shadow: none; }

.slbl { display: inline-block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; color: var(--brand); margin-bottom: 8px; font-family: "JetBrains Mono", monospace; }
.mono { font-family: "JetBrains Mono", "Fira Code", monospace; }