/* ------------- CSS Variables & Theme ------------- */
:root {
  --bg: #0b0b11;
  --bg-soft: #10121a;
  --text: #e7e9ee;
  --muted: #a5aec1;
  --card: #121422;
  --border: #1e2233;
  --accent: #7dd3fc;
  --grad-1: #8b5cf6;
  --grad-2: #06b6d4;
  --shadow: 0 20px 50px rgba(0,0,0,.35);
}

:root.light {
  --bg: #f7f8fb;
  --bg-soft: #ffffff;
  --text: #0c0e14;
  --muted: #475069;
  --card: #ffffff;
  --border: #e7e9f3;
  --accent: #2563eb;
  --grad-1: #60a5fa;
  --grad-2: #22c55e;
  --shadow: 0 18px 40px rgba(0,0,0,.08);
}

@media (prefers-color-scheme: light) {
  :root:not(.dark) { color-scheme: light; }
}
@media (prefers-color-scheme: dark) {
  :root:not(.light) { color-scheme: dark; }
}

/* ------------- Base ------------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, 'Apple Color Emoji','Segoe UI Emoji', 'Segoe UI Symbol';
  background: radial-gradient(1200px 600px at 10% -20%, rgba(139,92,246,.15), transparent 50%),
              radial-gradient(900px 600px at 120% 10%, rgba(34,197,94,.12), transparent 60%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
  letter-spacing: .2px;
}

.page-wrap { min-height: 100dvh; display: grid; grid-template-rows: auto 1fr auto; }

.container { width: min(1120px, 92vw); margin: 0 auto; padding: 24px 0 56px; }

.display { 
  font-size: clamp(2.2rem, 2.2rem + 1.5vw, 3.6rem); 
  line-height: 1.05; 
  letter-spacing: -0.02em; 
  margin: 0 0 12px 0;
}
.lead { color: var(--muted); font-size: clamp(1.05rem, .95rem + .35vw, 1.2rem); }

.accent { 
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ------------- Header ------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: grid; grid-template-columns: 1fr auto auto; gap: 18px;
  align-items: center;
  padding: 18px 4vw;
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--bg), transparent 15%);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); }
.logo {
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  color: white; font-weight: 800; letter-spacing: .5px;
  box-shadow: var(--shadow);
}
.brand-text { font-weight: 700; white-space: nowrap; }

.nav { display: flex; gap: clamp(10px, 2vw, 22px); align-items: center; }
.nav a {
  color: var(--text); text-decoration: none; padding: 8px 12px; border-radius: 12px;
  border: 1px solid transparent;
}
.nav a:hover { border-color: var(--border); background: color-mix(in oklab, var(--card), transparent 30%); }

.controls { margin-left: auto; display: flex; align-items: center; }

/* ------------- Theme Switch ------------- */
.switch { position: relative; display: inline-grid; grid-template-columns: auto; align-items: center; }
.switch input { display: none; }
.switch .slider {
  width: 62px; height: 34px; border-radius: 999px; cursor: pointer;
  background: color-mix(in oklab, var(--card), transparent 20%);
  border: 1px solid var(--border);
  display: inline-block; position: relative; transition: background .2s ease;
}
.switch .slider::after {
  content: ""; position: absolute; top: 50%; left: 4px; translate: 0 -50%;
  width: 26px; height: 26px; border-radius: 50%;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  box-shadow: var(--shadow);
  transition: left .25s ease;
}
.switch input:checked + .slider::after { left: 32px; }
.switch .sun, .switch .moon {
  position: absolute; pointer-events: none; font-size: 12px; top: 50%; translate: 0 -50%; opacity: .8;
}
.switch .sun { left: 10px; }
.switch .moon { right: 10px; }

/* ------------- Hero ------------- */
.hero {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: min(4vw, 32px); margin-top: 28px;
  padding: clamp(24px, 3vw, 36px); border: 1px solid var(--border); border-radius: 28px;
  background: color-mix(in oklab, var(--bg-soft), transparent 8%);
}
.hero .lead { max-width: 52ch; }
.hero .cta-row { margin-top: 16px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 18px; border-radius: 14px; font-weight: 700; text-decoration: none;
  border: 1px solid var(--border);
}
.btn.primary { background: linear-gradient(135deg, var(--grad-1), var(--grad-2)); color: white; border: none; }
.btn.ghost { color: var(--text); background: transparent; }
.hero-art { position: relative; min-height: 260px; }
.blob { width: 100%; height: 100%; filter: drop-shadow(var(--shadow)); }

/* ------------- Cards ------------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 28px; }
.card {
  position: relative; border: 1px solid var(--border); border-radius: 22px; padding: 18px;
  background: linear-gradient(180deg, color-mix(in oklab, var(--card), transparent 0%), color-mix(in oklab, var(--card), transparent 14%));
  min-height: 140px; overflow: hidden;
}
.card::after {
  content: ""; position: absolute; inset: -20% -10% auto auto; height: 120px; width: 120px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--grad-1), transparent 60%);
  opacity: .25; filter: blur(12px);
}
.card h3 { margin: 6px 0 6px; }
.card p { color: var(--muted); margin: 0 0 10px; }
.card-link { position: absolute; inset: 0; border-radius: inherit; }
.card:hover { transform: translateY(-2px); transition: transform .2s ease; }

/* ------------- Page Hero ------------- */
.page-hero {
  margin-top: 22px; padding: 20px; border: 1px solid var(--border); border-radius: 22px;
  background: color-mix(in oklab, var(--card), transparent 6%);
}

/* ------------- Gallery Grid ------------- */
.gallery {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.tile {
  border: 1px solid var(--border); border-radius: 20px; overflow: hidden;
  background: color-mix(in oklab, var(--card), transparent 6%);
  display: grid; grid-template-rows: 200px auto;
}
.thumb {
  background: 
    radial-gradient(120px 80px at 10% 20%, color-mix(in oklab, var(--grad-1), transparent 30%), transparent 60%),
    radial-gradient(160px 120px at 90% 80%, color-mix(in oklab, var(--grad-2), transparent 35%), transparent 70%),
    linear-gradient(135deg, color-mix(in oklab, var(--card), transparent 0%), color-mix(in oklab, var(--card), transparent 20%));
}
.tile figcaption { padding: 12px 14px; }
.tile h4 { margin: 0 0 6px; }
.tile p { margin: 0; color: var(--muted); font-size: .95rem; }

/* ------------- Footer ------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 18px 4vw; color: var(--muted);
}

/* ------------- Responsive ------------- */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .nav { display: none; } /* keep it minimal for now */
  .cards { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
}