*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #fff;
  --text: #111;
  --text-secondary: #555;
  --text-muted: #999;
  --border: #e5e5e5;
  --border-light: #f0f0f0;
  --accent: #111;
  --accent-bg: #f5f5f5;
  --card-hover: #fafafa;
  --skeleton: #eee;
  --tag-bg: #f0f0f0;
  --tag-text: #555;
  --shadow: 0 1px 3px rgba(0,0,0,0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111;
    --text: #eee;
    --text-secondary: #aaa;
    --text-muted: #666;
    --border: #2a2a2a;
    --border-light: #1f1f1f;
    --accent: #eee;
    --accent-bg: #1a1a1a;
    --card-hover: #181818;
    --skeleton: #222;
    --tag-bg: #222;
    --tag-text: #aaa;
    --shadow: 0 1px 3px rgba(0,0,0,0.2);
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  max-width: 520px;
  margin: 0 auto;
  padding: 0 16px 40px;
}

/* Header */
header {
  padding: 28px 0 16px;
}

.header-inner {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

header h1 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 400;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--accent-bg);
  border-radius: 10px;
  margin-bottom: 16px;
}

.tab {
  flex: 1;
  padding: 10px 0;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 7px;
  transition: all 0.15s;
  font-family: inherit;
}

.tab.active {
  background: var(--bg);
  color: var(--text);
  box-shadow: var(--shadow);
}

/* Status Bar */
.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0 12px;
  font-size: 12px;
  color: var(--text-muted);
}

/* Project List */
.project-list {
  display: flex;
  flex-direction: column;
}

/* Skeleton Loading */
.skeleton {
  background: var(--skeleton);
  border-radius: 8px;
  margin-bottom: 8px;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Project Card */
.project-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.15s;
  background: var(--bg);
  cursor: pointer;
}

.project-card:hover {
  border-color: var(--text-muted);
}

.card-summary {
  display: flex;
  align-items: flex-start;
  padding: 14px 14px;
  gap: 12px;
  min-height: 44px;
}

.card-rank {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 22px;
  padding-top: 1px;
}

.card-body {
  flex: 1;
  min-width: 0;
}

.card-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
  word-break: break-all;
}

.card-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-top: 5px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
  font-size: 12px;
  flex-wrap: wrap;
}

.meta-lang {
  color: var(--text-muted);
  font-size: 11px;
}

.meta-stars {
  font-weight: 700;
  color: var(--text);
}

.meta-gained {
  color: var(--text);
  font-weight: 600;
  background: var(--accent-bg);
  padding: 1px 7px;
  border-radius: 8px;
  font-size: 11px;
}

.meta-forks {
  color: var(--text-muted);
  font-size: 11px;
}

.card-expand {
  font-size: 14px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform 0.2s;
  padding-top: 1px;
}

.project-card.expanded .card-expand {
  transform: rotate(90deg);
}

/* Expanded Details */
.card-detail {
  display: none;
  padding: 0 14px 14px 48px;
  border-top: 1px solid var(--border-light);
  margin-top: 0;
  padding-top: 12px;
}

.project-card.expanded .card-detail {
  display: block;
}

.card-detail p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 10px;
}

.card-detail .detail-row {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.card-detail .detail-label {
  font-size: 12px;
  color: var(--text-muted);
  min-width: 40px;
}

.card-detail .detail-value {
  font-size: 12px;
  color: var(--text-secondary);
}

.card-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.topic-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--tag-bg);
  color: var(--tag-text);
}

.card-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1.5px solid var(--text);
  padding-bottom: 1px;
}

/* Footer */
footer {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

footer a {
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 380px) {
  header h1 { font-size: 20px; }
  .card-summary { padding: 12px 10px; gap: 8px; }
  .card-detail { padding-left: 40px; }
}