/* ==========================================================================
   木冬 · 设计规范（Living Style Guide）
   仅用于 design-system.html 的页面骨架，复用 style.css 的设计 token。
   组件示例直接使用站点真实类名，确保「规范即实现」。
   ========================================================================== */

.ds-body {
  background: var(--bg);
  color: var(--ink);
}

/* ---------- 布局 ---------- */
.ds-layout {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 56px;
  max-width: 1320px;
  margin: 0 auto;
  padding: 40px 36px 140px;
}

.ds-sidebar {
  position: sticky;
  top: 32px;
  align-self: start;
  max-height: calc(100vh - 64px);
  overflow: auto;
  padding-right: 8px;
}

.ds-brand {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.ds-brand .dot {
  color: var(--accent);
}
.ds-version {
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 26px;
}

.ds-toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid var(--line);
}
.ds-toc a {
  display: block;
  padding: 7px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-family: var(--font-label);
  font-size: 12.5px;
  color: var(--ink-2);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease),
    background 0.25s var(--ease);
}
.ds-toc a:hover {
  color: var(--ink);
  background: var(--accent-wash);
}
.ds-toc a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 500;
}
.ds-toc .num {
  display: inline-block;
  width: 22px;
  color: var(--muted);
  font-size: 11px;
}

.ds-main {
  min-width: 0;
}

/* ---------- 页头 ---------- */
.ds-hero {
  padding: 8px 0 40px;
  border-bottom: 1px solid var(--line);
}
.ds-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 60px);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 14px 0 18px;
}
.ds-hero .ds-lead {
  font-size: clamp(15px, 1.3vw, 18px);
  line-height: 1.72;
  color: var(--ink-2);
  max-width: 62ch;
}
.ds-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 22px;
  font-family: var(--font-label);
  font-size: 12px;
  color: var(--muted);
}
.ds-meta strong {
  color: var(--ink-2);
  font-weight: 500;
}

/* ---------- 章节 ---------- */
.ds-section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 28px;
}
.ds-section:last-of-type {
  border-bottom: 0;
}
.ds-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-label);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.ds-kicker .num {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-wash);
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0;
}
.ds-h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.ds-desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
  max-width: 66ch;
  margin-bottom: 30px;
}
.ds-h3 {
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 38px 0 16px;
}
.ds-h3:first-child {
  margin-top: 0;
}

/* ---------- 通用卡片 / 栅格 ---------- */
.ds-card {
  padding: 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}
.ds-grid {
  display: grid;
  gap: 16px;
}
.ds-grid.cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.ds-grid.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.ds-grid.cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.ds-grid.auto {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

/* ---------- 色板 ---------- */
.ds-swatch {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0;
}
.ds-chip {
  height: 68px;
  border-radius: 12px;
  border: 1px solid var(--line);
  cursor: copy;
  position: relative;
  transition: transform 0.25s var(--ease);
}
.ds-chip:hover {
  transform: translateY(-2px);
}
.ds-chip::after {
  content: "点击复制";
  position: absolute;
  right: 8px;
  bottom: 8px;
  font-family: var(--font-label);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: rgba(127, 127, 127, 0.85);
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}
.ds-chip:hover::after {
  opacity: 1;
}
.ds-swatch-name {
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink);
}
.ds-swatch-val {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  color: var(--muted);
  word-break: break-all;
}

/* ---------- 表格 ---------- */
.ds-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
.ds-table th,
.ds-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.ds-table th {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.ds-table td code,
.ds-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: var(--accent);
}
.ds-table tr:last-child td {
  border-bottom: 0;
}

/* ---------- 组件演示盒 ---------- */
.ds-demo {
  padding: 26px;
  border-radius: var(--radius);
  background: var(--surface-warm);
  border: 1px dashed var(--line-strong);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}
.ds-demo.block {
  display: block;
}
.ds-demo.stack {
  flex-direction: column;
  align-items: stretch;
}
.ds-demo + .ds-demo {
  margin-top: 14px;
}
.ds-demo-label {
  font-family: var(--font-label);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

/* 静态化真实组件（避免固定定位 / 绝对定位跑出演示盒） */
.ds-demo .nav-inner {
  position: static;
  max-width: none;
}
.ds-demo .nav-menu {
  position: static;
  animation: none;
  box-shadow: none;
}
.ds-demo .nav-user {
  position: static;
}

/* ---------- 间距标尺 ---------- */
.ds-scale-row {
  display: grid;
  grid-template-columns: 64px 1fr 90px;
  align-items: center;
  gap: 14px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
}
.ds-scale-row:last-child {
  border-bottom: 0;
}
.ds-scale-bar {
  height: 12px;
  border-radius: 4px;
  background: var(--accent);
  opacity: 0.75;
}
.ds-scale-name {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: var(--ink-2);
}
.ds-scale-val {
  font-family: var(--font-label);
  font-size: 11.5px;
  color: var(--muted);
  text-align: right;
}

/* ---------- 排版样例 ---------- */
.ds-type-row {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.ds-type-row:last-child {
  border-bottom: 0;
}
.ds-type-sample {
  margin-bottom: 10px;
  line-height: 1.2;
}
.ds-type-spec {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-family: var(--font-label);
  font-size: 11.5px;
  color: var(--muted);
}
.ds-type-spec code {
  color: var(--accent);
}

/* ---------- 阴影 / 圆角 ---------- */
.ds-elev {
  height: 96px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-family: var(--font-label);
  font-size: 11.5px;
  color: var(--muted);
}
.ds-radius {
  width: 100%;
  height: 84px;
  background: var(--accent-wash);
  border: 1px solid var(--line-strong);
  display: grid;
  place-items: center;
  font-family: var(--font-label);
  font-size: 11px;
  color: var(--accent);
}

/* ---------- 原则 ---------- */
.ds-principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.ds-principle {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}
.ds-principle .n {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 14px;
}
.ds-principle h4 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 8px;
}
.ds-principle p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}

/* ---------- 做 / 不做 ---------- */
.ds-do,
.ds-dont {
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.7;
}
.ds-do {
  background: rgba(28, 107, 118, 0.07);
  border: 1px solid rgba(28, 107, 118, 0.2);
}
.ds-dont {
  background: rgba(180, 60, 50, 0.07);
  border: 1px solid rgba(180, 60, 50, 0.2);
}
.ds-do b,
.ds-dont b {
  display: block;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.ds-do b {
  color: var(--accent);
}
.ds-dont b {
  color: #b43c32;
}
.ds-do ul,
.ds-dont ul {
  margin: 0;
  padding-left: 18px;
}
.ds-do li,
.ds-dont li {
  margin: 4px 0;
  color: var(--ink-2);
}

/* ---------- 无障碍对比度 ---------- */
.ds-contrast {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
}
.ds-contrast .pair {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ds-contrast .dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--line);
}
.ds-contrast .ratio {
  font-family: var(--font-label);
  font-size: 12px;
  color: var(--muted);
}
.ds-badge-pass {
  font-family: var(--font-label);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(28, 107, 118, 0.12);
  color: var(--accent);
}

/* ---------- 返回站内 ---------- */
.ds-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-label);
  font-size: 12.5px;
  color: var(--accent);
  margin-bottom: 18px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
  .ds-layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 24px 20px 100px;
  }
  .ds-sidebar {
    position: static;
    max-height: none;
    overflow: visible;
    margin-bottom: 8px;
  }
  .ds-toc {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
    border-left: 0;
    margin-top: 14px;
  }
  .ds-toc a {
    margin-left: 0;
    border-left: 0;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 11.5px;
  }
  .ds-toc a.active {
    border-color: var(--accent);
    background: var(--accent-wash);
  }
  .ds-toc .num {
    display: none;
  }
  .ds-grid.cols-3,
  .ds-grid.cols-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .ds-principles {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .ds-grid.cols-2,
  .ds-grid.cols-3,
  .ds-grid.cols-4 {
    grid-template-columns: 1fr;
  }
  .ds-section {
    padding: 40px 0;
  }
  .ds-demo {
    padding: 18px;
  }
  .ds-scale-row {
    grid-template-columns: 52px 1fr 70px;
  }
}