/* Bracketree design system —— token 与几何规范见 specs/001-bracket-generator/design.md，
   本文件自 doc/design-mockup.html 定稿原型移植，改动须先同步设计稿。 */
/* ---------- tokens ---------- */
  :root {
    --ground: #F4F6F4;
    --sheet: #FFFFFF;
    --ink: #17221C;
    --ink-2: #5A6B60;
    --line: #D9E2DB;
    --line-strong: #26332B;
    --accent: #177B4B;
    --accent-ink: #0E5A35;
    --accent-soft: #E2F0E7;
    --chip: #ECF2ED;
    --on-accent: #FFFFFF;
    --shadow: 0 1px 2px rgb(23 34 28 / .05), 0 8px 28px -12px rgb(23 34 28 / .12);
    --ease-out: cubic-bezier(.23, 1, .32, 1);
    /* 打印几何真值：--slot-h、.b-col min-width、.region 间距被 scripts/bake-static.mjs
       printScale 的缩放常量引用——改动这几处须重校准（tests/site.test.js 互锁测试会失败） */
    --slot-h: 27px;
    --stub: 26px;
  }
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --ground: #0E1512;
      --sheet: #16201A;
      --ink: #E9F0EB;
      --ink-2: #93A699;
      --line: #28352D;
      --line-strong: #C2D2C7;
      --accent: #41B478;
      --accent-ink: #62C992;
      --accent-soft: #1B2E23;
      --chip: #1A2620;
      --on-accent: #062015;
      --shadow: 0 1px 2px rgb(0 0 0 / .4), 0 10px 30px -12px rgb(0 0 0 / .5);
    }
  }
  :root[data-theme="dark"] {
    --ground: #0E1512;
    --sheet: #16201A;
    --ink: #E9F0EB;
    --ink-2: #93A699;
    --line: #28352D;
    --line-strong: #C2D2C7;
    --accent: #41B478;
    --accent-ink: #62C992;
    --accent-soft: #1B2E23;
    --chip: #1A2620;
    --on-accent: #062015;
    --shadow: 0 1px 2px rgb(0 0 0 / .4), 0 10px 30px -12px rgb(0 0 0 / .5);
  }

  /* ---------- base ---------- */
  body {
    background: var(--ground);
    color: var(--ink);
    font: 450 15.5px/1.65 Archivo, system-ui, -apple-system, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
  }
  .wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
  .mono { font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
  a { color: var(--accent); }
  :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

  /* ---------- header ---------- */
  .site-head { display: flex; align-items: center; gap: 12px; padding: 18px 0 0; }
  .wordmark { display: flex; align-items: center; gap: 9px; text-decoration: none; color: var(--ink); }
  .wordmark svg { display: block; }
  .wordmark b { font-weight: 700; font-size: 17px; letter-spacing: -.01em; }
  .head-note { margin-left: auto; font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); }

  /* ---------- hero ---------- */
  .hero { padding: 40px 0 22px; max-width: 640px; }
  .eyebrow { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); font-weight: 500; margin-bottom: 10px; }
  h1 { font-size: 34px; line-height: 1.12; font-weight: 700; letter-spacing: -.022em; margin: 0 0 10px; text-wrap: balance; }
  .hero p { margin: 0; color: var(--ink-2); font-size: 16px; }

  /* ---------- controls ---------- */
  .controls { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; padding: 4px 0 18px; }
  .seg { display: inline-flex; background: var(--chip); border-radius: 9px; padding: 3px; gap: 2px; }
  .seg button, .pills button {
    font: 550 13px Archivo, system-ui, sans-serif; color: var(--ink-2);
    background: transparent; border: 0; border-radius: 7px; padding: 7px 14px; cursor: pointer;
    transition: transform 160ms var(--ease-out), background-color 160ms ease, color 160ms ease, box-shadow 160ms ease;
  }
  .seg button[aria-pressed="true"] { background: var(--sheet); color: var(--ink); box-shadow: 0 1px 3px rgb(0 0 0 / .14); }
  .pills { display: inline-flex; flex-wrap: wrap; gap: 4px; background: var(--chip); border-radius: 9px; padding: 3px; }
  .pills button { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-weight: 500; font-size: 12.5px; padding: 7px 10px; font-variant-numeric: tabular-nums; }
  .pills button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-ink); }
  .seg button:active, .pills button:active, .btn:active { transform: scale(.97); }
  @media (hover: hover) and (pointer: fine) {
    .seg button:not([aria-pressed="true"]):hover, .pills button:not([aria-pressed="true"]):hover { color: var(--ink); }
  }
  .actions { margin-left: auto; display: flex; gap: 8px; }
  .btn {
    font: 600 13.5px Archivo, system-ui, sans-serif; border-radius: 9px; padding: 10px 18px; cursor: pointer;
    border: 1px solid var(--line); background: var(--sheet); color: var(--ink);
    transition: transform 160ms var(--ease-out), background-color 160ms ease, border-color 160ms ease, color 160ms ease;
    position: relative;
  }
  .btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
  .btn.done { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-ink); }
  @media (hover: hover) and (pointer: fine) {
    .btn:hover { border-color: var(--ink-2); }
    .btn.primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
    .btn.done:hover { border-color: var(--accent); }
  }
  .btn .swap { display: inline-block; transition: opacity 200ms ease, filter 200ms ease; }
  .btn .swap.blurring { opacity: 0; filter: blur(2px); }

  /* ---------- sheet ---------- */
  .sheet { background: var(--sheet); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); overflow: hidden; }
  .sheet-head { display: flex; align-items: baseline; gap: 14px; padding: 16px 22px 12px; border-bottom: 1px solid var(--line); }
  .sheet-head .t { font-weight: 700; font-size: 15px; letter-spacing: -.01em; }
  .sheet-head .m { margin-left: auto; font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); font-variant-numeric: tabular-nums; }
  .sheet-body { padding: 26px 26px 30px; overflow-x: auto; }
  .print-head { display: none; }

  /* ---------- bracket ---------- */
  .bracket { display: flex; min-width: min-content; }
  .b-col { flex: 1 1 0; display: flex; flex-direction: column; min-width: 148px; }
  .b-col > .rlabel { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 10px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); padding-bottom: 12px; }
  .b-matches { flex: 1; display: flex; flex-direction: column; justify-content: space-around; }
  .match { position: relative; margin-right: var(--stub); padding: 8px 0; }
  .b-col:last-child .match { margin-right: 0; }
  .match::before { content: ""; position: absolute; right: 0; top: calc(8px + var(--slot-h)); bottom: 8px; border-right: 1.5px solid var(--line-strong); }
  .match::after { content: ""; position: absolute; left: 100%; top: calc(8px + var(--slot-h) + (100% - 16px - var(--slot-h)) / 2); width: var(--stub); border-top: 1.5px solid var(--line-strong); }
  .b-col:last-child .match::before, .b-col:last-child .match::after { display: none; }
  .glabel { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 9.5px; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 3px; }
  .slot { display: flex; align-items: flex-end; gap: 7px; height: var(--slot-h); }
  .slot .seed { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 10px; font-weight: 500; color: var(--ink-2); width: 16px; text-align: right; padding-bottom: 5px; font-variant-numeric: tabular-nums; }
  .slot .line { flex: 1; border-bottom: 1.5px solid var(--line-strong); padding: 2px 1px 4px; font-size: 13px; font-weight: 550; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .slot input.line { background: transparent; border: 0; border-bottom: 1.5px solid var(--line-strong); border-radius: 0; font: 550 13px Archivo, system-ui, sans-serif; color: var(--ink); outline: none; width: 100%; padding: 2px 1px 4px; transition: border-color 160ms ease, background-color 160ms ease; }
  .slot input.line::placeholder { color: var(--ink-2); font-weight: 450; }
  .slot input.line:focus { border-bottom-color: var(--accent); background: var(--accent-soft); }
  .slot.tbd .line { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 10.5px; font-weight: 400; letter-spacing: .04em; color: var(--ink-2); }
  .slot.bye .line { border-bottom-color: var(--line); color: var(--ink-2); font-style: italic; font-weight: 400; }
  .region + .region { margin-top: 34px; }
  .region > .rlabel { display: flex; align-items: center; gap: 14px; font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 11px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--ink); margin-bottom: 18px; }
  .region > .rlabel::after { content: ""; flex: 1; border-top: 1px solid var(--line); }
  .gf-note { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 9.5px; color: var(--ink-2); letter-spacing: .06em; text-transform: uppercase; margin-top: 4px; }

  /* ---------- round robin ---------- */
  .rr { display: grid; grid-template-columns: 220px 1fr; gap: 26px; align-items: start; }
  .roster { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 10px; }
  .roster label { display: flex; align-items: center; gap: 6px; }
  .roster .seed { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 10px; color: var(--ink-2); width: 15px; text-align: right; font-variant-numeric: tabular-nums; }
  .roster input { width: 100%; background: transparent; border: 0; border-bottom: 1.5px solid var(--line-strong); font: 550 12.5px Archivo, system-ui, sans-serif; color: var(--ink); padding: 3px 1px 4px; outline: none; transition: border-color 160ms ease, background-color 160ms ease; }
  .roster input::placeholder { color: var(--ink-2); font-weight: 450; }
  .roster input:focus { border-bottom-color: var(--accent); background: var(--accent-soft); }
  .rr-table-wrap { overflow-x: auto; }
  .rr-table { border-collapse: collapse; width: 100%; }
  .rr-table th { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 10px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); text-align: left; padding: 0 18px 10px 0; border-bottom: 1.5px solid var(--line-strong); }
  .rr-table td { padding: 9px 18px 9px 0; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 500; white-space: nowrap; }
  .rr-table td.rd { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 11px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
  .rr-table .vs { color: var(--ink-2); font-weight: 400; padding: 0 6px; }
  .rr-table .bye { color: var(--ink-2); font-style: italic; font-weight: 400; }

  .sheet-foot { padding: 0 26px 18px; font-size: 12px; color: var(--ink-2); display: flex; gap: 8px; align-items: baseline; }
  .sheet-foot .dot::before { content: "·"; margin-right: 8px; }

  /* ---------- below-sheet sections ---------- */
  .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; padding: 44px 0 8px; }
  .step .n { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 11px; font-weight: 500; letter-spacing: .1em; color: var(--accent); margin-bottom: 8px; }
  .step h3 { font-size: 15.5px; font-weight: 650; margin: 0 0 4px; letter-spacing: -.01em; }
  .step p { margin: 0; color: var(--ink-2); font-size: 14px; }
  .prose { max-width: 660px; padding: 34px 0 6px; }
  .prose h2 { font-size: 21px; font-weight: 700; letter-spacing: -.015em; margin: 0 0 10px; text-wrap: balance; }
  .prose p { margin: 0 0 14px; color: var(--ink-2); }
  .prose strong { color: var(--ink); font-weight: 600; }
  .chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 26px 0 8px; }
  .chip { font: 550 12.5px Archivo, system-ui, sans-serif; color: var(--ink-2); background: var(--chip); border-radius: 999px; padding: 7px 14px; text-decoration: none; transition: background-color 160ms ease, color 160ms ease; }
  @media (hover: hover) and (pointer: fine) { .chip:hover { background: var(--accent-soft); color: var(--accent-ink); } }
  .faq { max-width: 660px; padding: 26px 0 10px; }
  .faq h2 { font-size: 21px; font-weight: 700; letter-spacing: -.015em; margin: 0 0 6px; }
  .faq details { border-bottom: 1px solid var(--line); }
  .faq summary { cursor: pointer; font-weight: 600; font-size: 14.5px; padding: 14px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
  .faq summary::after { content: "+"; font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; color: var(--ink-2); font-size: 15px; transition: transform 200ms var(--ease-out); }
  .faq details[open] summary::after { transform: rotate(45deg); }
  .faq details p { margin: 0 0 14px; color: var(--ink-2); font-size: 14px; }
  .site-foot { margin-top: 48px; border-top: 1px solid var(--line); padding: 20px 0 30px; display: flex; gap: 10px; align-items: baseline; font-size: 12px; color: var(--ink-2); }
  .site-foot .mono { font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; }

  @media (max-width: 760px) {
    .steps { grid-template-columns: 1fr; }
    .rr { grid-template-columns: 1fr; }
    .actions { margin-left: 0; width: 100%; }
    .actions .btn { flex: 1; }
    h1 { font-size: 28px; }
  }

  /* ---------- print ---------- */
  @media print {
    @page { size: landscape; margin: 12mm; }
    body { background: #fff; }
    .site-head, .hero, .controls, .steps, .prose, .chips, .faq, .site-foot, .sheet-foot { display: none !important; }
    .wrap { max-width: none; padding: 0; }
    .sheet { border: 0; box-shadow: none; border-radius: 0; }
    .sheet-head { display: none; }
    .print-head { display: flex; justify-content: space-between; align-items: baseline; padding: 0 0 10px; border-bottom: 2px solid #000; margin-bottom: 14px; }
    .print-head .t { font-weight: 700; font-size: 16px; }
    .print-head .m { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
    .sheet-body { padding: 0; overflow: visible; }
    /* 烘焙期按几何预估写入 --ps：用 zoom 而非 transform——zoom 缩放布局盒本身，
       打印分页按缩放后高度算（transform 的原盒分页会溢出/带出空白第二页） */
    .sheet-body[style*="--ps"] { zoom: var(--ps); }
    /* 打印无滚动：轮次表宽出可视宽度时须完整流出（overflow:auto 会把右侧场次列裁掉），
       宽度由 sheet-body 的 zoom 收缩兜底 */
    .rr-table-wrap { overflow: visible; }
    .slot .line, .slot input.line { border-bottom-color: #000; color: #000; }
    .match::before, .match::after { border-color: #000; }
    .slot input.line { background: transparent !important; }
  }
  @media (prefers-reduced-motion: reduce) {
    .seg button, .pills button, .btn, .chip, .faq summary::after, .btn .swap, .slot input.line, .roster input { transition: none; }
    .seg button:active, .pills button:active, .btn:active { transform: none; }
  }