:root {
  --color-bg: #ffffff;
  --color-bg-subtle: #f6f8fa;
  --color-border: #d0d7de;
  --color-text: #1f2328;
  --color-text-muted: #59636e;
  --color-accent: #0969da;
  --color-accent-hover: #0550ae;
  --color-success: #1a7f37;
  --radius: 6px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0d1117;
    --color-bg-subtle: #161b22;
    --color-border: #30363d;
    --color-text: #e6edf3;
    --color-text-muted: #8d96a0;
    --color-accent: #4493f8;
    --color-accent-hover: #6cb0ff;
    --color-success: #3fb950;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 62px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--color-text);
  font-size: 16px;
}
.main-nav {
  display: flex;
  gap: 18px;
  flex: 1;
  overflow-x: auto;
}
.main-nav a {
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
}
.main-nav a:hover { color: var(--color-text); }

.btn {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-outline {
  border-color: var(--color-border);
  color: var(--color-text);
  background: var(--color-bg-subtle);
}
.btn-outline:hover { border-color: var(--color-text-muted); color: var(--color-text); }
.btn-primary {
  background: var(--color-success);
  color: #fff;
}

/* Hero */
.hero {
  padding: 48px 0 28px;
  text-align: left;
}
.hero h1 {
  font-size: 32px;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.hero p {
  color: var(--color-text-muted);
  font-size: 16px;
  max-width: 640px;
  margin: 0;
}

/* Filters */
.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 24px 0;
}
.filters a {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 4px 12px;
  font-size: 13px;
  color: var(--color-text-muted);
}
.filters a.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* App grid */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin: 24px 0 48px;
}

.app-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  transition: border-color .15s ease, transform .15s ease;
}
.app-card:hover {
  border-color: var(--color-accent);
}
.app-card-media {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-bg-subtle);
  overflow: hidden;
}
.app-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.app-card-body {
  padding: 14px 16px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.app-card-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}
.badge-verified {
  color: var(--color-success);
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.app-card-summary {
  font-size: 14px;
  color: var(--color-text-muted);
  flex: 1;
}
.app-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--color-text-muted);
}
.tag {
  display: inline-block;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2px 8px;
  font-size: 11px;
  color: var(--color-text-muted);
}
.stars { color: #d4a72c; letter-spacing: 1px; }

/* Mobile: square-ish media on very small screens is handled via aspect-ratio override */
@media (max-width: 480px) {
  .app-card-media { aspect-ratio: 1 / 1; }
  .hero h1 { font-size: 26px; }
}

/* Pagination */
.pagination {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin: 32px 0;
}
.pagination a, .pagination span {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-text);
}
.pagination a.current, .pagination span.current {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* App detail page */
.app-detail-header {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 32px 0 16px;
  border-bottom: 1px solid var(--color-border);
}
.app-detail-media {
  width: 220px;
  aspect-ratio: 16/9;
  border-radius: var(--radius);
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
}
.app-detail-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.app-detail-header h1 { margin: 0 0 6px; font-size: 26px; }

@media (max-width: 600px) {
  .app-detail-header { flex-direction: column; }
  .app-detail-media { width: 100%; }
}

.review {
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
}
.review-author { font-weight: 600; font-size: 14px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-subtle);
  margin-top: 60px;
}
.site-footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 32px 0;
  font-size: 13px;
  color: var(--color-text-muted);
}
.footer-nav { display: flex; gap: 16px; }