:root {
  --ink: #27313a;
  --muted: #69757e;
  --line: rgba(39, 49, 58, .1);
  --paper: #f4f4f3;
  --card: rgba(255, 255, 255, .72);
  --accent: #68757e;
  --label-size: 12px;
  --font-text: "LXGW WenKai Screen", ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 自适应布局参数：列数按屏宽、卡片高度按屏高，app.js 按剩余高度决定多少行显示国旗 */
  --cols: 8;
  --gap: 12px;
  --card-h: 76px;
  --chip-h: 22px;
  --flag-w: 54px;
  --flag-h: 36px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  height: 100%;
  background: var(--paper);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-width: 320px;
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  overflow-y: auto;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-text);
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.page-shell {
  width: min(1120px, calc(100% - 32px));
  min-height: 100dvh;
  margin: 0 auto;
  padding: 18px 0 16px;
  display: flex;
  flex-direction: column;
}

.site-header {
  flex: 0 0 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: var(--label-size);
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  width: 24px;
  height: 24px;
  display: block;
  object-fit: contain;
}

.header-note {
  color: var(--muted);
  font-size: var(--label-size);
}

main {
  min-height: 0;
  flex: 1;
  display: flex;
  align-items: center;
  padding-top: 10px;
}

.store-list {
  width: 100%;
  flex-shrink: 0;
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  gap: var(--gap);
}

.region-card {
  min-width: 0;
  height: var(--card-h);
  padding: 7px 5px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  box-shadow: 0 8px 22px rgba(31, 49, 66, .045);
  text-decoration: none;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.region-card:hover,
.region-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: #f8f9f9;
}

.region-icon {
  position: relative;
  flex-shrink: 0;
  width: var(--flag-w);
  height: var(--flag-h);
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(104, 117, 126, .5);
  border-radius: 3px;
  background: #fff;
  box-shadow: 0 1px 2px rgba(31, 49, 66, .12);
}

.region-icon .fi {
  width: calc(var(--flag-w) - 2px);
  height: calc(var(--flag-h) - 2px);
  background-size: cover;
}

.region-name {
  flex-shrink: 0;
  max-width: 100%;
  overflow: hidden;
  color: var(--ink);
  font-size: var(--label-size);
  font-weight: 600;
  line-height: 1.1;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 缩写形态：放不下的行由 app.js 降级为该样式，保证全部内容一屏显示 */
.region-caption {
  display: none;
  max-width: 100%;
  overflow: hidden;
  color: var(--muted);
  font-size: var(--label-size);
  font-weight: 600;
  line-height: 1;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.region-card.is-compact {
  height: var(--chip-h);
  padding: 0 4px;
  gap: 0;
}

.region-card.is-compact:hover,
.region-card.is-compact:focus-visible {
  transform: none;
}

.region-card.is-compact .region-icon,
.region-card.is-compact .region-name {
  display: none;
}

.region-card.is-compact .region-caption {
  display: block;
}

a:focus-visible {
  outline: 3px solid rgba(104, 117, 126, .4);
  outline-offset: 2px;
}

/* 列数随屏宽变化，上限 8 列；卡片高度需容下 内容 + padding + border，
   否则 flex 会压缩国旗和文字（曾导致 12mini 上国旗压扁、文字截断）：
   38(flag) + 4(gap) + 13(name) + 14(padding) + 2(border) = 71 → 72 */
@media (max-width: 900px) {
  :root {
    --cols: 6;
    --gap: 8px;
  }

  .page-shell {
    width: calc(100% - 28px);
  }
}

@media (max-width: 700px) {
  :root {
    --cols: 5;
    --gap: 6px;
  }
}

@media (max-width: 600px) {
  :root {
    --cols: 4;
    --gap: 5px;
    --card-h: 72px;
    --chip-h: 22px;
    --flag-w: 56px;
    --flag-h: 38px;
  }

  .page-shell {
    width: calc(100% - 16px);
    padding-top: 10px;
    padding-bottom: 8px;
  }

  .site-header {
    flex-basis: 36px;
  }

  main {
    align-items: flex-start;
    padding-top: 8px;
  }
}

/* 矮屏：压缩卡片尺寸，让国旗能多显示几行。
   26(flag) + 4(gap) + 11(name) + 14(padding) + 2(border) = 57 → 58 */
@media (max-height: 640px) {
  :root {
    --card-h: 58px;
    --chip-h: 18px;
    --gap: 4px;
    --flag-w: 38px;
    --flag-h: 26px;
    --label-size: 10px;
  }

  .page-shell {
    padding-top: 5px;
    padding-bottom: 4px;
  }

  .site-header {
    flex-basis: 28px;
  }

  main {
    padding-top: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}