:root {
  --bg: #0b0d12;
  --bg-alt: #11141b;
  --surface: #171b24;
  --surface-2: #1e2330;
  --border: #262c3a;
  --text: #e6e9f0;
  --text-dim: #9aa3b8;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --gold: #fbbf24;
  --green: #34d399;
  --red: #f87171;
  --radius: 14px;
}

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

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

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,13,18,0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; font-weight: 800; font-size: 15px;
}
.brand h1 { font-size: 18px; }
.tagline { font-size: 12px; color: var(--text-dim); }
.nav { display: flex; gap: 24px; }
.nav-link { color: var(--text-dim); text-decoration: none; font-size: 14px; transition: color .2s; }
.nav-link:hover { color: var(--text); }

/* Hero */
.hero {
  padding: 80px 0 60px;
  background:
    radial-gradient(ellipse at top left, rgba(124,92,255,0.18), transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(34,211,238,0.12), transparent 50%);
}
.hero h2 {
  font-size: 44px; font-weight: 800; letter-spacing: -0.02em;
  background: linear-gradient(90deg, #fff, #b8bfd1);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}
.hero p { font-size: 17px; color: var(--text-dim); max-width: 640px; }
.hero-stats { display: flex; gap: 32px; margin-top: 40px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 28px; font-weight: 700; color: var(--accent-2); }
.stat-label { font-size: 13px; color: var(--text-dim); }

/* Sections */
.section { padding: 80px 0; }
.section.alt { background: var(--bg-alt); }
.section-head { margin-bottom: 36px; }
.section-head h2 { font-size: 30px; margin-bottom: 6px; }
.section-head p { color: var(--text-dim); }

/* Filter */
.filter-bar { display: flex; gap: 8px; margin-bottom: 28px; flex-wrap: wrap; }
.filter-btn {
  padding: 8px 16px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-dim); font-size: 13px; cursor: pointer;
  transition: all .2s;
}
.filter-btn:hover { color: var(--text); border-color: var(--accent); }
.filter-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Cards */
.card-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform .2s, border-color .2s;
  position: relative;
  overflow: hidden;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.rank-badge {
  position: absolute; top: 14px; right: 14px;
  font-size: 11px; font-weight: 700; color: var(--text-dim);
  background: var(--surface-2); padding: 4px 8px; border-radius: 6px;
}
.rank-badge.top { color: var(--gold); background: rgba(251,191,36,0.12); }

.card-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.avatar {
  width: 52px; height: 52px; border-radius: 12px;
  display: grid; place-items: center; font-weight: 700; font-size: 18px;
  color: #fff;
  flex-shrink: 0;
}
.card-title { font-size: 17px; font-weight: 600; }
.card-sub { font-size: 13px; color: var(--text-dim); margin-top: 2px; }

.score-row { display: flex; align-items: baseline; gap: 8px; margin: 10px 0 14px; }
.score-main {
  font-size: 32px; font-weight: 800;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.score-max { color: var(--text-dim); font-size: 14px; }
.score-tag {
  margin-left: auto;
  font-size: 11px; padding: 3px 8px; border-radius: 6px;
  background: rgba(52,211,153,0.15); color: var(--green); font-weight: 600;
}

.meta { font-size: 13px; color: var(--text-dim); margin-bottom: 14px; min-height: 40px; }

.dims { display: grid; gap: 8px; }
.dim { display: grid; grid-template-columns: 72px 1fr 32px; align-items: center; gap: 10px; font-size: 12px; }
.dim-label { color: var(--text-dim); }
.dim-bar {
  height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden;
}
.dim-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 3px;
}
.dim-val { text-align: right; color: var(--text); font-variant-numeric: tabular-nums; }

/* Method */
.method-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.method-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.method-icon { font-size: 30px; margin-bottom: 12px; }
.method-card h3 { font-size: 17px; margin-bottom: 6px; }
.method-card p { color: var(--text-dim); font-size: 14px; margin-bottom: 12px; }
.weight {
  font-size: 12px; color: var(--accent-2); font-weight: 600;
}

/* Footer */
.site-footer { padding: 36px 0; border-top: 1px solid var(--border); text-align: center; color: var(--text-dim); font-size: 13px; }

/* Landing page */
.hero-landing { padding: 100px 0 40px; }
.eyebrow {
  display: inline-block;
  font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent-2); margin-bottom: 16px;
}
.nav-link.active { color: var(--text); }

.entry-section { padding-top: 20px; }
.entry-grid {
  display: grid; gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.entry-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-decoration: none;
  color: inherit;
  transition: all .25s;
  position: relative;
  overflow: hidden;
}
.entry-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(124,92,255,0.08), transparent 60%);
  opacity: 0; transition: opacity .25s;
}
.entry-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.entry-card:hover::before { opacity: 1; }
.entry-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: grid; place-items: center; font-size: 26px;
  margin-bottom: 18px;
}
.entry-card h3 { font-size: 20px; margin-bottom: 10px; }
.entry-card p { color: var(--text-dim); font-size: 14px; margin-bottom: 18px; }
.entry-cta { color: var(--accent-2); font-size: 14px; font-weight: 600; }

.about { text-align: center; max-width: 720px; margin: 0 auto; }
.about h2 { font-size: 24px; margin-bottom: 12px; }
.about p { color: var(--text-dim); }

/* Subpage hero */
.page-hero {
  padding: 60px 0 30px;
  background: radial-gradient(ellipse at top, rgba(124,92,255,0.12), transparent 60%);
  border-bottom: 1px solid var(--border);
}
.page-hero h2 { font-size: 34px; margin: 10px 0 8px; }
.page-hero p { color: var(--text-dim); max-width: 640px; }
.back-link {
  color: var(--text-dim); text-decoration: none; font-size: 13px;
  display: inline-block; transition: color .2s;
}
.back-link:hover { color: var(--accent-2); }

/* Lists */
.sub-title { font-size: 20px; margin-bottom: 18px; }
.list { display: grid; gap: 14px; }
.list-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: border-color .2s, transform .2s;
}
.list-item:hover { border-color: var(--accent); transform: translateX(3px); }
.list-meta { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; }
.list-item h4 { font-size: 16px; margin-bottom: 6px; }
.list-item p { color: var(--text-dim); font-size: 14px; margin-bottom: 10px; }
.list-foot { font-size: 12px; color: var(--text-dim); }
.date { font-size: 12px; color: var(--text-dim); }

.tag {
  font-size: 11px; padding: 3px 8px; border-radius: 6px; font-weight: 600;
}
.tag-purple { background: rgba(124,92,255,0.15); color: #a78bfa; }
.tag-cyan { background: rgba(34,211,238,0.15); color: #67e8f9; }
.tag-green { background: rgba(52,211,153,0.15); color: #6ee7b7; }
.tag-orange { background: rgba(245,158,11,0.15); color: #fcd34d; }
.tag-red { background: rgba(248,113,113,0.15); color: #fca5a5; }

/* Timeline */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px;
  width: 2px; background: var(--border);
}
.tl-item { position: relative; margin-bottom: 28px; }
.tl-dot {
  position: absolute; left: -28px; top: 8px;
  width: 16px; height: 16px; border-radius: 50%;
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px currentColor;
}
.tl-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  transition: border-color .2s;
}
.tl-content:hover { border-color: var(--accent); }
.tl-head { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }
.tl-date { font-size: 12px; color: var(--text-dim); }
.tl-content h4 { font-size: 16px; margin-bottom: 6px; }
.tl-content p { color: var(--text-dim); font-size: 14px; }

@media (max-width: 640px) {
  .hero h2, .hero-landing h2 { font-size: 30px; }
  .page-hero h2 { font-size: 26px; }
  .nav { display: none; }
}