/* CantoBench 專案頁樣式。中英文兩版共用。
   色票與版面沿用 OCF 實習成果報告站（ai.ocf.tw），已取得授權。 */

:root {
  --color-page: #f5f7fa;
  --color-surface: #ffffff;
  --color-ink: #101d26;
  --color-body: #4e5b66;
  --color-muted: #5c6b79;
  --color-border: #e2e8ee;
  --color-brand: #0e7490;
  --color-brand-dark: #0f766e;
  --color-brand-wash: #e2f1f6;
  --accent-danger: #dc2626;
  --accent-warm: #b45309;
  --accent-qwen-4b: #3b82f6;
  --accent-internvl: #b45309;

  --font-body: "Noto Sans TC", "Space Grotesk", system-ui, sans-serif;
  --font-display: "Space Grotesk", "Noto Sans TC", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;

  --sidebar-w: 286px;
  --content-w: 780px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-page);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* ---------------------------------------------------------------- 版面 */

.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  align-items: start;
}

/* ---------------------------------------------------------------- 側邊欄 */

.sidebar {
  position: sticky; top: 0;
  height: 100vh; overflow-y: auto;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(160%) blur(8px);
  border-right: 1px solid var(--color-border);
  padding: 34px 22px 40px;
  display: flex; flex-direction: column; gap: 22px;
}
.sidebar__eyebrow {
  font-size: 10px; letter-spacing: 2px; color: var(--color-muted);
  margin: 0; font-weight: 400; font-family: var(--font-display);
}
.sidebar__title {
  font-size: 19px; font-weight: 600; line-height: 1.35;
  color: var(--color-ink); margin: 6px 0 0; letter-spacing: -0.01em;
}
.sidebar__subtitle {
  font-size: 12.5px; color: var(--color-muted); margin: 4px 0 0;
  font-family: var(--font-display);
}
.sidebar__nav { display: flex; flex-direction: column; gap: 2px; }
.toc-link {
  display: flex; align-items: baseline; gap: 9px;
  font-size: 13.5px; padding: 8px 11px; color: var(--color-brand);
  text-decoration: none; border-left: 1.7px solid transparent;
  border-radius: 0 5px 5px 0; transition: background .14s, color .14s;
}
.toc-link:hover { background: rgba(14, 116, 144, 0.06); }
.toc-link.is-active {
  background: var(--color-brand-wash);
  border-left-color: var(--color-brand);
  font-weight: 500;
}
.toc-num {
  font-family: var(--font-mono); font-size: 10.5px;
  color: var(--color-muted); flex: none;
}
.toc-en { color: var(--color-muted); font-size: 11.5px; display: block; }
.sidebar__footer {
  margin-top: auto; padding-top: 18px;
  border-top: 1px solid var(--color-border);
  font-size: 12px; color: var(--color-muted);
  display: flex; flex-direction: column; gap: 8px;
}
.sidebar__footer a { color: var(--color-brand); text-decoration: none; }
.sidebar__footer a:hover { text-decoration: underline; }

/* ---------------------------------------------------------------- 內容 */

.content { min-width: 0; padding: 0 40px 80px; }
.wrap { max-width: var(--content-w); margin: 0 auto; }

header.hero { padding: 56px 0 40px; }
header.hero h1 {
  font-size: clamp(28px, 4vw, 38px); line-height: 1.25; margin: 0 0 16px;
  letter-spacing: -0.025em; font-weight: 650;
}
header.hero .sub {
  font-size: clamp(16px, 2vw, 18px); color: var(--color-body);
  margin: 0 0 26px; max-width: 58ch; line-height: 1.75;
}
.badges { display: flex; flex-wrap: wrap; gap: 8px; }
.badge {
  font: 500 12px/1 var(--font-mono);
  border: 1px solid var(--color-border); border-radius: 6px;
  padding: 7px 10px; color: var(--color-body); background: var(--color-surface);
  text-decoration: none; transition: all .14s;
}
a.badge:hover { border-color: var(--color-brand); color: var(--color-brand); }

.cta-button {
  display: inline-block; margin: 6px 0 22px;
  font: 600 14px/1 var(--font-body); text-decoration: none;
  background: var(--color-brand); color: #fff; border: 1px solid var(--color-brand);
  border-radius: 8px; padding: 11px 18px; transition: all .14s;
}
.cta-button:hover { background: var(--color-brand-dark); border-color: var(--color-brand-dark); }

section { padding: 44px 0; border-top: 1px solid var(--color-border); }
section > h2 {
  font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--color-muted); margin: 0 0 8px; font-weight: 600;
  font-family: var(--font-display);
}
section > h2 + .lead {
  font-size: clamp(20px, 2.6vw, 24px); line-height: 1.4; margin: 0 0 24px;
  letter-spacing: -0.02em; max-width: 34ch; font-weight: 600;
}
h3 { font-size: 15.5px; margin: 32px 0 10px; font-weight: 650;
     letter-spacing: -0.005em; }
p { margin: 0 0 15px; max-width: 68ch; color: var(--color-ink); }
ul { max-width: 68ch; padding-left: 20px; }
li { margin-bottom: 9px; }
.muted { color: var(--color-body); }
.small { font-size: 14px; }
code {
  font: 500 0.86em/1.5 var(--font-mono);
  background: var(--color-surface); padding: 2px 5px; border-radius: 4px;
  border: 1px solid var(--color-border);
}
.cjk-big { font-size: 1.2em; letter-spacing: 0.06em; }
a { color: var(--color-brand); text-decoration-thickness: 1px;
    text-underline-offset: 3px; }

/* ---------------------------------------------------------------- 表格 */

.tbl-scroll {
  overflow-x: auto; margin: 20px 0; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: 9px;
}
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td {
  text-align: left; padding: 10px 14px;
  border-bottom: 1px solid var(--color-border); vertical-align: top;
}
tbody tr:last-child td { border-bottom: 0; }
th {
  color: var(--color-muted); font-weight: 600; font-size: 11.5px;
  text-transform: uppercase; letter-spacing: 0.05em; white-space: nowrap;
  background: #fafbfc;
}
td.num, th.num { text-align: right; font-family: var(--font-mono);
                 font-size: 13px; white-space: nowrap; }

/* ---------------------------------------------------------------- 統計磚 */

.stats {
  display: grid; gap: 1px; background: var(--color-border);
  border: 1px solid var(--color-border); border-radius: 9px; overflow: hidden;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); margin: 22px 0;
}
.stat { background: var(--color-surface); padding: 15px 16px; }
.stat .v { font: 600 23px/1.2 var(--font-mono); letter-spacing: -0.025em;
           color: var(--color-ink); }
.stat .k { font-size: 12px; color: var(--color-muted); margin-top: 5px; }

/* ---------------------------------------------------------------- 指標圖例 */

.metric-legend {
  display: grid; gap: 1px; background: var(--color-border);
  border: 1px solid var(--color-border); border-radius: 9px; overflow: hidden;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); margin: 20px 0;
}
.metric-legend > div { background: var(--color-surface); padding: 13px 16px; }
.metric-legend dt {
  font: 600 13px/1 var(--font-mono); color: var(--color-brand); margin: 0 0 5px;
}
.metric-legend dd {
  font-size: 13px; line-height: 1.55; color: var(--color-body); margin: 0;
}

/* ---------------------------------------------------------------- 浮動語言鈕 */

/* 固定在右下角。放側邊欄裡的話，行動版側邊欄收合成一排 pill 之後
   語言切換會被擠到很難按，浮動的位置在兩種版面下都一致。 */
.lang-float {
  position: fixed; right: 20px; bottom: 20px; z-index: 40;
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 999px; padding: 9px 16px;
  font-size: 13px; font-weight: 500; color: var(--color-body);
  text-decoration: none; box-shadow: 0 2px 10px rgba(16, 29, 38, 0.09);
  transition: all .15s;
}
.lang-float:hover {
  border-color: var(--color-brand); color: var(--color-brand);
  box-shadow: 0 4px 14px rgba(16, 29, 38, 0.14);
}
.lang-float::before { content: "🌐"; font-size: 13px; }

/* ---------------------------------------------------------------- 提示框 */

.note {
  border: 1px solid var(--color-border); border-left: 3px solid var(--color-brand);
  background: var(--color-brand-wash);
  padding: 16px 20px; margin: 22px 0; border-radius: 0 8px 8px 0;
}
.note p:last-child { margin-bottom: 0; }
.note strong { color: var(--color-brand-dark); }

/* ---------------------------------------------------------------- 對立對 */

.pairs {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 10px; margin: 20px 0;
}
.pair {
  border: 1px solid var(--color-border); border-radius: 8px; padding: 13px 10px;
  background: var(--color-surface); text-align: center;
}
.pair .glyphs {
  font-size: 26px; line-height: 1.3; display: flex;
  align-items: center; justify-content: center; gap: 10px;
}
.pair .arrow { font-size: 13px; color: var(--color-muted); }
.pair .canto { color: var(--accent-danger); font-weight: 600; }
.pair .why { font-size: 11.5px; color: var(--color-muted); margin-top: 6px;
             line-height: 1.5; }

/* ---------------------------------------------------------------- 樣本瀏覽器 */

.browser { margin-top: 22px; }
.filters {
  display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 15px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.fgroup { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.fgroup > .flabel {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--color-muted); font-weight: 600;
}
.chip {
  font: 500 12.5px/1 var(--font-body); border: 1px solid var(--color-border);
  background: var(--color-surface); color: var(--color-body);
  border-radius: 999px; padding: 6px 12px; cursor: pointer; transition: all .13s;
}
.chip:hover { border-color: var(--color-brand); color: var(--color-brand); }
.chip[aria-pressed="true"] {
  background: var(--color-brand); border-color: var(--color-brand); color: #fff;
}
.count { font-size: 12.5px; color: var(--color-muted); padding: 13px 0 2px;
         font-family: var(--font-mono); }

.grid {
  display: grid; gap: 8px;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
}
.card {
  /* <figure> 的瀏覽器預設樣式帶 margin: 1em 40px，不重置的話每張卡片
     左右各被推開 40px，看起來像卡片很窄、間距很大，其實是外距吃掉了空間 */
  width: 100%; min-width: 0; margin: 0;
  border: 1px solid var(--color-border); border-radius: 8px; overflow: hidden;
  background: var(--color-surface); display: flex; flex-direction: column;
}
.card.wide { grid-column: 1 / -1; }
.shot {
  padding: 12px; background: #f8fafb;
  display: flex; align-items: center; justify-content: center;
  min-height: 74px; overflow-x: auto;
}
.shot img { height: 48px; width: auto; max-width: none; display: block;
            border-radius: 2px; }
.card.zoom .shot img { height: 96px; }
.meta { padding: 10px 12px 12px; border-top: 1px solid var(--color-border); }
.meta .gt { font-size: 14.5px; line-height: 1.5; margin-bottom: 8px;
            word-break: break-all; }
.meta .gt .hl { color: var(--accent-danger); font-weight: 600; }
.tags { display: flex; flex-wrap: wrap; gap: 4px; }
.tag {
  font: 500 10px/1 var(--font-mono); padding: 4px 6px; border-radius: 4px;
  background: #f2f5f8; color: var(--color-muted);
  border: 1px solid var(--color-border);
}
.tag.ext, .tag.pair {
  background: #fdecec; color: var(--accent-danger); border-color: #f6d5d5;
}
.empty { padding: 34px 0; color: var(--color-muted); text-align: center;
         grid-column: 1 / -1; }

.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%;
       margin-right: 7px; vertical-align: -1px; }

/* ---------------------------------------------------------------- 頁尾 */

footer { padding: 40px 0 20px; border-top: 1px solid var(--color-border); }
footer .cols {
  display: grid; gap: 26px;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  margin-bottom: 30px;
}
footer h4 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--color-muted); margin: 0 0 10px; font-weight: 600;
}
footer ul { list-style: none; padding: 0; margin: 0; font-size: 13.5px; }
footer li { margin-bottom: 6px; }
.disclosure {
  border-top: 1px solid var(--color-border); padding-top: 18px;
  font-size: 13px; color: var(--color-body); max-width: 74ch; line-height: 1.7;
}

/* ---------------------------------------------------------------- RWD */

@media (max-width: 1024px) {
  :root { --sidebar-w: 240px; }
  .content { padding: 0 28px 64px; }
}

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static; height: auto; border-right: 0;
    border-bottom: 1px solid var(--color-border);
    padding: 22px 20px 18px; gap: 14px;
  }
  .sidebar__nav {
    flex-direction: row; flex-wrap: wrap; gap: 4px;
  }
  .toc-link {
    border-left: 0; border-radius: 999px; padding: 6px 12px;
    border: 1px solid var(--color-border); background: var(--color-surface);
  }
  .toc-link.is-active {
    border-color: var(--color-brand); background: var(--color-brand-wash);
  }
  .toc-en { display: none; }
  .sidebar__footer {
    margin-top: 0; flex-direction: row; align-items: center;
    flex-wrap: wrap; gap: 12px;
  }
  .content { padding: 0 22px 56px; }
  header.hero { padding: 34px 0 28px; }
  section { padding: 34px 0; }
}

@media (max-width: 560px) {
  body { font-size: 15.5px; }
  .content { padding: 0 18px 48px; }
  .grid { grid-template-columns: 1fr; }
  .bar-row { grid-template-columns: 74px 1fr 54px; gap: 8px; }
  .bar-label { font-size: 12px; }
  .lang-float { right: 14px; bottom: 14px; padding: 8px 13px; font-size: 12.5px; }
}