:root {
  --bg: #0f1115;
  --bg-soft: #171a21;
  --card: #1d2230;
  --card-hover: #242b3b;
  --text: #e8eaf0;
  --muted: #9aa3b5;
  --accent: #ff7ab6;
  --accent-2: #6ec1ff;
  --border: #2a3142;
  --radius: 12px;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1a2030, var(--bg));
  color: var(--text);
  line-height: 1.6;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 0.9em;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
}
.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: 0.5px;
}
.brand:hover { text-decoration: none; color: var(--accent); }
.tag {
  color: var(--muted);
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
}

/* Hero */
.hero { padding: 40px 0 12px; }
.hero h1 {
  margin: 0 0 8px;
  font-size: 2.2rem;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead { color: var(--muted); margin: 0 0 20px; max-width: 640px; }

.controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.controls input,
.controls select {
  flex: 1 1 240px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 0.95rem;
  outline: none;
}
.controls input:focus,
.controls select:focus { border-color: var(--accent-2); }

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  padding: 24px 0 48px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}
.card:hover {
  transform: translateY(-2px);
  background: var(--card-hover);
  border-color: var(--accent-2);
}
.card h3 { margin: 0; font-size: 1.05rem; }
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent); text-decoration: none; }
.card p { margin: 0; color: var(--muted); font-size: 0.88rem; flex: 1; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--accent-2);
}
.chip.cat { color: var(--accent); }

.muted { color: var(--muted); }
.empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 40px 0;
  color: var(--muted);
}

/* Detail page */
.detail { padding: 32px 0 48px; }
.detail .back {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--muted);
}
.detail h1 { margin: 0 0 8px; font-size: 1.9rem; }
.detail .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 12px 0 24px;
}
.detail .body {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.detail .body p { margin: 0 0 12px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  margin-top: 24px;
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

@media (max-width: 560px) {
  .hero h1 { font-size: 1.7rem; }
  .site-header .nav { flex-direction: column; gap: 8px; align-items: flex-start; }
}