/* ============================================================
   base.css — 验证台的外壳（与平台无关的中性外壳）
   故意做得素，别抢控件本身的风头。
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background: #f4f4f5;
  color: #18181b;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
  transition: background-color 180ms ease;
}

body.mode-dark {
  background: #18181a;
  color: #e4e4e7;
}

/* ---------------- 顶栏 ---------------- */

.bar,
.board__cap,
.hcard__cap {
  -webkit-user-select: none;
  user-select: none;
}

.bar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid #e4e4e7;
  backdrop-filter: saturate(180%) blur(14px);
}

body.mode-dark .bar {
  background: rgba(24, 24, 26, 0.86);
  border-bottom-color: #2a2a2e;
}

.bar__brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.bar__brand span {
  font-weight: 400;
  font-size: 11.5px;
  color: #8a8a93;
}

.bar__group {
  display: inline-flex;
  gap: 2px;
  padding: 2px;
  background: #ececee;
  border-radius: 8px;
}

body.mode-dark .bar__group {
  background: #26262a;
}

.seg {
  appearance: none;
  border: 0;
  padding: 4px 10px;
  border-radius: 6px;
  background: transparent;
  color: #52525b;
  font: inherit;
  font-size: 12px;
  line-height: 1.4;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease;
}

body.mode-dark .seg {
  color: #a1a1aa;
}

.seg:hover {
  color: #18181b;
}

body.mode-dark .seg:hover {
  color: #fff;
}

.seg[aria-pressed="true"] {
  background: #fff;
  color: #18181b;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}

body.mode-dark .seg[aria-pressed="true"] {
  background: #3a3a40;
  color: #fff;
}

.bar__toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #52525b;
  cursor: pointer;
  user-select: none;
}

body.mode-dark .bar__toggle {
  color: #a1a1aa;
}

.bar__toggle input {
  margin: 0;
  accent-color: #18181b;
}

.bar__spacer {
  flex: 1;
}

.bar__hint,
a.bar__hint {
  text-decoration: none;
  font-size: 11.5px;
  color: #8a8a93;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.bar__repo {
  font-size: 11.5px;
  color: #52525b;
  text-decoration: none;
  white-space: nowrap;
  padding: 3px 8px;
  border: 1px solid #e4e4e7;
  border-radius: 6px;
}

.bar__repo:hover {
  color: #18181b;
  border-color: #d4d4d8;
}

body.mode-dark .bar__repo {
  color: #a1a1aa;
  border-color: #2a2a2e;
}

@media (max-width: 1180px) {
  .bar__brand span,
  .bar__hint {
    display: none;
  }
}

/* ---------------- 舞台 ---------------- */

.stage {
  display: grid;
  grid-template-columns: minmax(0, 460px);
  justify-content: center;
  gap: 18px;
  padding: 24px 20px 48px;
}

/* 并排：每张卡片有最小宽度，放不下就横向滚动，像画廊一样翻 */
body.is-compare .stage {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(360px, 1fr);
  grid-template-columns: none;
  justify-content: start;
  max-width: none;
  margin: 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  scroll-padding-inline: 20px;
  scroll-behavior: smooth;
  padding-bottom: 20px;
}

body.is-compare .board {
  scroll-snap-align: start;
}

@media (prefers-reduced-motion: reduce) {
  body.is-compare .stage {
    scroll-behavior: auto;
  }
}

/* 翻页按钮，只在并排时显示 */
.bar__nav {
  gap: 4px;
}

.bar__nav[hidden] {
  display: none;
}

.bar__navbtn {
  appearance: none;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid #e4e4e7;
  border-radius: 7px;
  background: #fff;
  color: #52525b;
  font: inherit;
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
}

.bar__navbtn:hover:not(:disabled) {
  background: #f4f4f5;
  color: #18181b;
}

.bar__navbtn:disabled {
  opacity: 0.35;
  cursor: default;
}

.bar__navbtn:focus-visible {
  outline: 2px solid #3584e4;
  outline-offset: 2px;
}

body.mode-dark .bar__navbtn {
  background: #232327;
  border-color: #3a3a40;
  color: #d4d4d8;
}

body.mode-dark .bar__navbtn:hover:not(:disabled) {
  background: #2c2c31;
  color: #fff;
}

.board {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: #fff;
  border: 1px solid #e4e4e7;
  border-radius: 12px;
  /* 主题面板是直角的，卡片不裁的话底部方角会溢出圆角、顶部圆角缝隙会漏出卡片底色 */
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04),
    0 16px 32px -24px rgba(0, 0, 0, 0.25);
}

body.mode-dark .board {
  border-color: #2a2a2e;
  background: #1f1f23;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

.board[hidden] {
  display: none;
}

.board__cap {
  display: flex;
  /* 卡片有 1px 边框，内圆角是 11px；写 12 会在角上留一条卡片底色的弧线 */
  border-radius: 11px 11px 0 0;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  border-bottom: 1px solid #efeff1;
  background: #fafafa;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 11px;
  color: #8a8a93;
  letter-spacing: 0.01em;
}

body.mode-dark .board__cap {
  background: #1f1f23;
  border-bottom-color: #2a2a2e;
}

body.mode-dark .hcard {
  background: #1f1f23;
  border-color: #2a2a2e;
}

body.mode-dark .hcard__cap {
  background: #232327;
  border-bottom-color: #2a2a2e;
  color: #d4d4d8;
}

body.mode-dark .hcard__cap small {
  color: #8a8a93;
}

.board__cap b {
  font-weight: 600;
  font-size: 11.5px;
  color: #3f3f46;
}

body.mode-dark .board__cap b {
  color: #d4d4d8;
}

.board__cap code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 10.5px;
  color: #a1a1aa;
}

.board__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  border-radius: 0 0 11px 11px;
}

.board__body > .panel {
  flex: 1;
}

/* ---------------- 面板内容 ---------------- */

.panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 22px 22px 26px;
}

.group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.group__title {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--ui-text-2);
  letter-spacing: 0;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.row--tight {
  gap: 14px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

/* ---------------- 菜单演示（index.html 的 Menu 组） ---------------- */

.menu-demo {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

/* 右键区域：虚线框只是告诉读者这里能点右键，不属于组件本身 */
.menu-target {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 58px;
  padding: 0 12px;
  box-sizing: border-box;
  border: 1px dashed #c9c9d0;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.015);
  color: var(--ui-text-2);
  font-size: 12px;
  user-select: none;
  cursor: default;
}

body.mode-dark .menu-target {
  border-color: #3f3f46;
  background: rgba(255, 255, 255, 0.02);
}

.menu-target:focus-visible {
  outline: 2px solid var(--ui-accent);
  outline-offset: 2px;
}

/* ---------------- 状态矩阵（demo/harness.html） ---------------- */

.harness {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  align-items: start;
  padding: 20px;
  max-width: 3400px;
  margin: 0 auto;
}

.harness--single {
  grid-template-columns: minmax(0, 560px);
  justify-content: center;
}

.hcard {
  min-width: 0;
  background: #fff;
  border: 1px solid #e4e4e7;
  border-radius: 12px;
  overflow: hidden;
}

.hcard__cap {
  padding: 10px 14px;
  border-bottom: 1px solid #efeff1;
  background: #fafafa;
  font-family: system-ui, sans-serif;
  font-size: 11.5px;
  font-weight: 600;
  color: #3f3f46;
}

.hcard__cap small {
  display: block;
  margin-top: 2px;
  font-weight: 400;
  font-size: 10.5px;
  color: #8a8a93;
}

.hbody {
  padding: 14px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.hgroup {
  padding: 12px 0 0;
}

.hgroup:first-child {
  padding-top: 0;
}

.hgroup__title {
  margin: 0 0 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--ui-text) 45%, transparent);
}

.hrow {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  border-top: 1px solid color-mix(in srgb, var(--ui-text) 8%, transparent);
}

.hrow:first-of-type {
  border-top: 0;
}

.hrow__label {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 9.5px;
  color: color-mix(in srgb, var(--ui-text) 42%, transparent);
}

.hrow__slot {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hrow__slot .field {
  width: 100%;
}