/* ========== 基础变量：参考苹果设计规范的配色与圆角 ========== */
:root {
  --bg: #f5f5f7;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(0, 0, 0, 0.06);
  --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.06);
  --card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.06), 0 16px 40px rgba(0, 0, 0, 0.12);
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --accent: #0071e3;
  --radius-lg: 22px;
  --radius-md: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card-bg: rgba(28, 28, 30, 0.72);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
    --card-shadow-hover: 0 4px 14px rgba(0, 0, 0, 0.4), 0 20px 48px rgba(0, 0, 0, 0.5);
    --text-primary: #f5f5f7;
    --text-secondary: #98989d;
    --accent: #2997ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

/* ========== 顶部标题区 ========== */
.page-header {
  text-align: center;
  padding: 72px 24px 40px;
}

.page-title {
  margin: 0;
  font-size: 40px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.page-subtitle {
  margin: 10px 0 32px;
  font-size: 17px;
  color: var(--text-secondary);
}

.search-box {
  position: relative;
  max-width: 420px;
  margin: 0 auto;
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
  pointer-events: none;
}

#searchInput {
  width: 100%;
  padding: 12px 16px 12px 44px;
  font-size: 16px;
  border-radius: 980px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text-primary);
  outline: none;
  transition: box-shadow 0.2s ease;
}

#searchInput:focus {
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.15);
}

/* ========== 卡片网格：一行三个 ========== */
main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px 80px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 860px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .card-grid { grid-template-columns: 1fr; }
  .page-title { font-size: 30px; }
}

.empty-tip {
  text-align: center;
  color: var(--text-secondary);
  margin-top: 60px;
  font-size: 16px;
}

/* ========== 卡片本体 ========== */
.site-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: transform 0.25s cubic-bezier(0.25, 1, 0.5, 1),
              box-shadow 0.25s cubic-bezier(0.25, 1, 0.5, 1);
}

.site-card:hover {
  transform: translateY(-4px) scale(1.015);
  box-shadow: var(--card-shadow-hover);
}

.site-card:active {
  transform: translateY(-1px) scale(0.99);
}

.site-icon-wrap {
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.site-icon-wrap img {
  width: 30px;
  height: 30px;
  object-fit: contain;
}

.site-icon-fallback {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 600;
  color: #fff;
}

.site-info {
  min-width: 0;
}

.site-name {
  font-size: 17px;
  font-weight: 590;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-desc {
  margin-top: 3px;
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}