:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #047857;
  --accent-glow: rgba(4,120,87,.12);
  --green: #059669;
  --green-glow: rgba(5,150,105,.12);
  --radius: 16px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Serif is reserved for display type; UI chrome stays sans */
.logo, h1, h2, .section-title {
  font-family: 'Source Serif 4', 'Noto Serif SC', 'Noto Serif', Georgia, serif;
}

/* ── Flowing background blobs ── */
.bg-blobs {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
}
.bg-blob {
  position: absolute; border-radius: 50%; filter: blur(120px);
  opacity: .35; animation-timing-function: ease-in-out;
  animation-iteration-count: infinite; animation-direction: alternate;
}
.bg-blob:nth-child(1) {
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(4,120,87,.4), transparent);
  top: -15%; left: -10%;
  animation-name: drift1; animation-duration: 18s;
}
.bg-blob:nth-child(2) {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(5,150,105,.35), transparent);
  bottom: -20%; right: -5%;
  animation-name: drift2; animation-duration: 22s;
}
.bg-blob:nth-child(3) {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(16,185,129,.25), transparent);
  top: 50%; left: 50%;
  animation-name: drift3; animation-duration: 20s;
}
.bg-blob:nth-child(4) {
  width: 450px; height: 450px;
  background: radial-gradient(circle, rgba(20,100,200,.2), transparent);
  top: -5%; right: 30%;
  animation-name: drift4; animation-duration: 24s;
}

@keyframes drift1 {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(80px, 40px) scale(1.15); }
  100% { transform: translate(-30px, 60px) scale(.9); }
}
@keyframes drift2 {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(-60px, -30px) scale(1.1); }
  100% { transform: translate(40px, -50px) scale(.95); }
}
@keyframes drift3 {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(50px, -20px) scale(1.2); }
  100% { transform: translate(-40px, 30px) scale(.85); }
}
@keyframes drift4 {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(-20px, 40px) scale(1.05); }
  100% { transform: translate(30px, -10px) scale(1.1); }
}

/* Noise texture overlay */
body::before {
  content: '';
  position: fixed; inset: 0;
  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='.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.4'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  opacity: .025; pointer-events: none; z-index: 0;
}

.container { position: relative; z-index: 1; max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* .Nav */
nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
nav .logo { font-size: 1.1em; font-weight: 700; letter-spacing: -.02em; }
nav .logo span { color: var(--accent); }
nav .links { display: flex; gap: 20px; }
nav a { color: var(--muted); text-decoration: none; font-size: .9em; transition: color .2s; }
nav a:hover { color: var(--text); }
nav .gh {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--surface); border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 8px; font-size: .85em; color: var(--text);
}
nav .gh:hover { background: var(--surface-hover); }

/* .Hero */
.hero { text-align: center; padding: 80px 0 60px; }
.hero .badge {
  display: inline-block; font-size: .8em; color: var(--accent);
  background: var(--accent-glow); border: 1px solid rgba(4,120,87,.25);
  padding: 4px 14px; border-radius: 20px; margin-bottom: 20px; letter-spacing: .04em;
}
.hero h1 {
  font-size: clamp(2.2em, 5vw, 3.4em); font-weight: 800;
  letter-spacing: -.03em; line-height: 1.1; margin-bottom: 16px;
  background: linear-gradient(135deg, #047857 30%, #059669);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p { font-size: 1.15em; color: var(--muted); max-width: 500px; margin: 0 auto 32px; line-height: 1.6; }
.hero .cta { display: inline-flex; gap: 12px; }
.hero .cta a {
  padding: 12px 28px; border-radius: 10px; font-weight: 600;
  text-decoration: none; font-size: .95em; transition: all .25s;
}
.cta-primary { background: var(--accent); color: #fff; box-shadow: 0 0 30px var(--accent-glow); }
.cta-primary:hover { background: #065f46; transform: translateY(-1px); }
.cta-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.cta-secondary:hover { background: var(--surface-hover); }

/* .Stats */
.stats {
  display: flex; justify-content: center; gap: 48px;
  padding: 40px 0 20px; border-top: 1px solid var(--border);
  margin-bottom: 40px;
}
.stat { text-align: center; }
.stat .num { font-size: 1.8em; font-weight: 800; letter-spacing: -.02em; }
.stat .num.blue { color: var(--accent); }
.stat .label { font-size: .85em; color: var(--muted); margin-top: 4px; }

/* .Section Title */
.section-title {
  font-size: 1.5em; font-weight: 700; margin-bottom: 8px; letter-spacing: -.02em;
}
.section-sub { color: var(--muted); margin-bottom: 32px; font-size: .95em; }

/* .Demos Grid */
.demos {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px; margin-bottom: 60px;
}
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: all .3s; position: relative;
  /* Default accent = brand green (Grass theme); per-card overrides below */
  --card-accent: var(--green);
  --card-glow: var(--green-glow);
  --card-badge-bg: rgba(34,197,94,.15);
  --card-badge-bd: rgba(34,197,94,.25);
  --card-btn: var(--accent);
  --card-btn-hover: #065f46;
}
.card:hover {
  border-color: var(--card-accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,0,0,.08), 0 0 60px var(--card-glow);
}

/* Per-card accents sampled from each wallpaper's palette */
.card-fall {
  --card-accent: #d97706;
  --card-glow: rgba(217,119,6,.15);
  --card-badge-bg: rgba(217,119,6,.14);
  --card-badge-bd: rgba(217,119,6,.28);
  --card-btn: #d97706;
  --card-btn-hover: #b45309;
}
.card-galaxy {
  --card-accent: #7c3aed;
  --card-glow: rgba(124,58,237,.15);
  --card-badge-bg: rgba(124,58,237,.14);
  --card-badge-bd: rgba(124,58,237,.28);
  --card-btn: #7c3aed;
  --card-btn-hover: #6d28d9;
}
.card-media {
  position: relative; height: 220px; overflow: hidden;
  background: linear-gradient(135deg, #18181b, #27272a);
}
.card-media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s;
}
.card:hover .card-media img { transform: scale(1.04); }
.card-media .overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(9,9,11,.75), transparent 55%);
}
.card-media .live-badge {
  position: absolute; top: 12px; right: 12px;
  background: var(--card-badge-bg); color: var(--card-accent);
  font-size: .75em; font-weight: 600; padding: 3px 10px;
  border-radius: 6px; border: 1px solid var(--card-badge-bd);
  display: flex; align-items: center; gap: 5px;
}
.live-badge::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--card-accent); animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; } 50% { opacity: .3; }
}

.card-body { padding: 20px; }
.card-body .tags { display: flex; gap: 6px; margin-bottom: 10px; }
.tag {
  font-size: .72em; font-weight: 500; padding: 2px 8px;
  border-radius: 5px; background: var(--surface-hover); color: var(--muted);
}
.tag.gl { background: rgba(59,130,246,.1); color: #2563eb; border: 1px solid rgba(59,130,246,.2); }
.tag.vk { background: rgba(168,85,247,.1); color: #a855f7; border: 1px solid rgba(168,85,247,.2); }

.card-body h2 { font-size: 1.15em; font-weight: 700; margin-bottom: 6px; letter-spacing: -.01em; }
.card-body p { color: var(--muted); font-size: .88em; line-height: 1.55; margin-bottom: 16px; }
.card-body .actions { display: flex; gap: 10px; }
.card-body .btn {
  flex: 1; text-align: center; padding: 10px 0; border-radius: 8px;
  font-size: .88em; font-weight: 600; text-decoration: none;
  transition: all .2s;
}
.btn-demo { background: var(--card-btn); color: #fff; }
.btn-demo:hover { background: var(--card-btn-hover); }

/* .Footer */
footer {
  text-align: center; padding: 60px 0 40px;
  border-top: 1px solid var(--border); color: var(--muted); font-size: .85em;
}
footer a { color: var(--accent); text-decoration: none; }
footer .divider { margin: 0 8px; color: #cbd5e1; }

/* .Demo Overlay */
.demo-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,.7);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity .3s, visibility .3s;
}
.demo-overlay.active { opacity: 1; visibility: visible; }

.demo-frame {
  position: relative; width: min(94vw, 900px); height: min(85vh, 700px);
  background: #fff; border-radius: var(--radius);
  overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,.3);
  display: flex; flex-direction: column;
}
.demo-frame-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: #f8fafc;
  border-bottom: 1px solid var(--border);
  font-weight: 600; font-size: .9em;
}
.demo-frame-header .demo-title { color: var(--text); }
.demo-frame-header .demo-close {
  width: 32px; height: 32px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface);
  font-size: 1.1em; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); transition: all .2s;
}
.demo-frame-header .demo-close:hover {
  background: #fee2e2; color: #dc2626; border-color: #fecaca;
}
.demo-frame iframe {
  flex: 1; border: 0; width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  .bg-blob { animation: none; }
  .live-badge::before { animation: none; }
}

@media (max-width: 600px) {
  .hero { padding: 60px 0 40px; }
  .stats { gap: 32px; }
  .demos { grid-template-columns: 1fr; }
  nav .links { display: none; }
  .demo-frame { width: 100vw; height: 100vh; border-radius: 0; }
}