/* ── CSS 变量 ─────────────────────────────────────── */
:root {
  --bg:        #0c0e14;
  --surface:   #13161f;
  --surface2:  #1a1e2a;
  --border:    rgba(255,255,255,0.07);
  --text:      #e8eaf0;
  --muted:     rgba(232,234,240,0.45);
  --accent:    #6EE7B7;          /* overridden by JS */
  --accent-dim:rgba(110,231,183,0.12);
  --font-head: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius:    14px;
  --radius-sm: 8px;
  --shadow:    0 4px 32px rgba(0,0,0,0.5);
  --transition:0.22s cubic-bezier(.4,0,.2,1);
}

/* ── Reset ────────────────────────────────────────── */
*, *::before, *::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

/* ── Background ───────────────────────────────────── */
.bg-layer {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none;
}
/* mesh style */
.bg-mesh {
  background:
    radial-gradient(ellipse 70% 60% at 10% -10%,  rgba(110,231,183,.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 90% 10%,   rgba(99,102,241,.10)  0%, transparent 55%),
    radial-gradient(ellipse 60% 50% at 50% 110%,  rgba(245,158,11,.08)  0%, transparent 55%),
    var(--bg);
}
/* dots style */
.bg-dots {
  background-image: radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  background-color: var(--bg);
}
/* gradient style */
.bg-gradient {
  background: linear-gradient(135deg, #0c0e14 0%, #111827 50%, #0c0e14 100%);
}

.noise-overlay {
  position: fixed; inset: 0; z-index: 1;
  pointer-events: none;
  opacity: .025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

/* ── Layout ───────────────────────────────────────── */
.page-wrap {
  position: relative; z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── Hero ─────────────────────────────────────────── */
.hero {
  padding: 72px 0 48px;
  text-align: center;
}
.hero-inner { max-width: 680px; margin: 0 auto; }

.site-title {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -.03em;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  opacity: 0; animation: fadeUp .6s .05s forwards;
}
.site-sub {
  color: var(--muted);
  font-size: .95rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 36px;
  opacity: 0; animation: fadeUp .6s .15s forwards;
}

/* ── Search ───────────────────────────────────────── */
.search-wrap {
  opacity: 0; animation: fadeUp .6s .25s forwards;
}
.engine-picker {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.engine-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: .8rem;
  font-family: var(--font-head);
  cursor: pointer;
  transition: var(--transition);
}
.engine-btn:hover { color: var(--text); border-color: rgba(255,255,255,0.18); }
.engine-btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 0 6px 0 20px;
  gap: 8px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.search-icon { width: 17px; height: 17px; color: var(--muted); flex-shrink: 0; }
.search-box input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 13px 0;
  caret-color: var(--accent);
}
.search-box input::placeholder { color: var(--muted); }
#search-btn {
  background: var(--accent);
  border: none;
  color: #0c0e14;
  width: 38px; height: 38px;
  border-radius: 50%;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
#search-btn:hover { transform: scale(1.1); filter: brightness(1.1); }

/* ── Category Nav ─────────────────────────────────── */
.cat-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
  opacity: 0; animation: fadeUp .6s .35s forwards;
}
.cat-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 20px;
  padding: 7px 18px;
  font-size: .85rem;
  font-family: var(--font-head);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex; align-items: center; gap: 6px;
}
.cat-btn:hover { color: var(--text); border-color: rgba(255,255,255,0.18); }
.cat-btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Main Grid ────────────────────────────────────── */
.main-grid {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

/* ── Section ──────────────────────────────────────── */
.section { opacity: 0; animation: fadeUp .5s forwards; }

.section-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.section-icon {
  font-size: 1.25rem;
  width: 36px; height: 36px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
}
.section-name {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}

/* ── Link Card ────────────────────────────────────── */
.link-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition),
              box-shadow var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.link-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-dim), transparent);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.link-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 0 1px var(--accent-dim);
}
.link-card:hover::before { opacity: 1; }

.card-name {
  font-family: var(--font-head);
  font-size: .92rem;
  font-weight: 700;
  color: var(--text);
  display: flex; align-items: center; gap: 7px;
}
.card-favicon {
  width: 16px; height: 16px;
  border-radius: 3px;
  flex-shrink: 0;
  object-fit: contain;
}
.card-favicon-fallback {
  width: 16px; height: 16px;
  background: var(--accent-dim);
  border-radius: 3px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: .55rem;
  font-weight: 800;
  color: var(--accent);
  font-family: var(--font-head);
}
.card-desc {
  font-size: .78rem;
  color: var(--muted);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-url {
  font-size: .7rem;
  color: rgba(232,234,240,0.2);
  margin-top: 4px;
  font-family: monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Animations ───────────────────────────────────── */
@keyframes fadeUp {
  from { opacity:0; transform:translateY(16px); }
  to   { opacity:1; transform:translateY(0); }
}

/* ── No Results ───────────────────────────────────── */
.no-results {
  text-align: center;
  color: var(--muted);
  padding: 60px 0;
  font-size: .95rem;
}

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 640px) {
  .page-wrap { padding: 0 16px 60px; }
  .hero { padding: 48px 0 36px; }
  .link-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
}

/* ── Scrollbar ────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ── Selection ────────────────────────────────────── */
::selection { background: var(--accent-dim); color: var(--accent); }