:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --border: #e6e8eb;
  --text: #1f2328;
  --text-muted: #6b7280;
  --accent: #3b82f6;
  --accent-soft: #eff6ff;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 16px rgba(16, 24, 40, 0.06);
  --shadow-hover: 0 4px 8px rgba(16, 24, 40, 0.06), 0 12px 32px rgba(16, 24, 40, 0.12);
  --radius: 14px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  padding: 56px 0 32px;
  text-align: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo .mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 800;
}

.tagline {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 16px;
}

/* ---------- Search ---------- */
.search-box {
  max-width: 520px;
  margin: 28px auto 0;
  position: relative;
}

.search-box svg {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
}

#search-input {
  width: 100%;
  padding: 13px 44px 13px 46px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
  transition: border-color 0.15s, box-shadow 0.15s;
}

#search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.kbd-hint {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 7px;
  background: var(--bg);
}

/* ---------- Category chips ---------- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin: 36px 0 20px;
}

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

.chip {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
}

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

.chip.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.count { color: var(--text-muted); font-size: 14px; white-space: nowrap; }
.count strong { color: var(--text); font-weight: 700; }

/* ---------- Grid & cards ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
  padding-bottom: 48px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: #d5dae0;
}

.card-top { display: flex; align-items: center; gap: 12px; }

.avatar {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 20px;
  font-weight: 800;
}

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

.card-title h3 { font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }

.domain {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

.arrow { color: #c2c8cf; font-size: 18px; transition: color 0.15s, transform 0.15s; }
.card:hover .arrow { color: var(--accent); transform: translate(2px, -2px); }

.card-desc { font-size: 14px; color: var(--text-muted); flex: 1 1 auto; }

.card-tags { display: flex; gap: 6px; flex-wrap: wrap; }

.tag {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
}

/* ---------- Empty state ---------- */
.empty {
  text-align: center;
  color: var(--text-muted);
  padding: 60px 0;
}
.empty .big { font-size: 40px; margin-bottom: 8px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}
.site-footer a { color: var(--accent); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

@media (max-width: 560px) {
  .site-header { padding: 40px 0 24px; }
  .logo { font-size: 23px; }
  .grid { grid-template-columns: 1fr; }
  .toolbar { justify-content: center; }
}