:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --text: #17171a;
  --muted: #6b6b70;
  --line: rgba(0, 0, 0, .10);
  --accent: #185FA5;
  --accent-soft: #e9f1f9;
  --shadow: 0 1px 2px rgba(0, 0, 0, .04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131313;
    --surface: #1c1c1e;
    --text: #ececee;
    --muted: #9a9aa0;
    --line: rgba(255, 255, 255, .11);
    --accent: #85B7EB;
    --accent-soft: #1b2b3a;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  padding: 56px 0 28px;
}

.site-header h1 {
  margin: 0 0 8px;
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 8px;
}

input[type="search"] {
  width: 100%;
  padding: 11px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: none;
  -webkit-appearance: none;
}

input[type="search"]:focus {
  border-color: var(--accent);
}

input[type="search"]::placeholder {
  color: var(--muted);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 5px 12px;
  font-size: 13px;
  font-family: inherit;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: none;
}

.chip:hover { border-color: var(--accent); color: var(--accent); }

.chip.on {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: transparent;
}

.count {
  margin: 20px 0 12px;
  font-size: 13px;
  color: var(--muted);
}

.list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card {
  display: block;
  padding: 20px 22px;
  text-decoration: none;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.card:hover {
  border-color: var(--accent);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--muted);
}

.card-meta time {
  font-variant-numeric: tabular-nums;
}

.tag {
  padding: 1px 8px;
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

.card h2 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.45;
}

.card-summary {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--muted);
}

.more {
  font-size: 13px;
  color: var(--accent);
}

.more::after {
  content: " →";
}

.empty {
  padding: 40px 0;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  margin-top: 56px;
  padding: 24px 0 48px;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

@media (max-width: 520px) {
  .site-header { padding: 36px 0 22px; }
  .site-header h1 { font-size: 22px; }
  .card { padding: 16px 18px; }
  .card h2 { font-size: 16px; }
}