*{box-sizing:border-box}
:root{
  --bg-0:#0b0720;
  --bg-1:#120a2d;
  --text:#ffffff;
  --muted:#bcb7d9;
  --accent:#6a5cf7;
  --ring:#a78bfa;
  --glow:0 0 30px rgba(167,139,250,.35), 0 0 60px rgba(106,92,247,.15);
}
html,body{height:100%}
body{
  margin:0;
  font-family:ui-sans-serif,system-ui,Segoe UI,Roboto,Helvetica,Arial;
  color:var(--text);
  background: radial-gradient(1200px 600px at 10% -10%, rgba(106,92,247,.25), transparent),
              radial-gradient(1000px 500px at 110% 10%, rgba(167,139,250,.25), transparent),
              linear-gradient(180deg, var(--bg-0), var(--bg-1));
}

.shell{max-width:1100px;margin:24px auto;padding:20px 24px;background:rgba(18,10,45,.4);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.08);border-radius:16px;box-shadow:var(--glow)}
h1{margin:0 0 6px 0;font-size:28px;letter-spacing:.4px}
h2{margin:4px 0 14px 0}
.tagline{margin:0;color:var(--muted)}

.controls{display:grid;grid-template-columns:repeat(12,1fr);gap:16px;align-items:end}
.control-group{grid-column:span 3;display:flex;flex-direction:column;gap:6px}
.control-group.small{grid-column:span 2}
.control-group label{font-size:12px;color:var(--muted)}
.control-group input[type="color"]{height:40px;border:none;background:transparent;cursor:pointer}
.control-group input[type="number"], .control-group select{height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.06);color:var(--text);padding:0 10px;outline:none}
.buttons{grid-column:span 12;display:flex;gap:10px;flex-wrap:wrap}
button{height:40px;padding:0 14px;border-radius:10px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.08);color:var(--text);cursor:pointer;transition:transform .08s ease, box-shadow .2s ease}
button:hover{transform:translateY(-1px);box-shadow:var(--glow)}
button:active{transform:translateY(0) scale(.98)}

.palette-section .swatches{display:grid;grid-template-columns:repeat(8,1fr);gap:12px}
.swatch{position:relative;height:120px;border-radius:14px;border:1px solid rgba(255,255,255,.12);overflow:hidden;box-shadow:var(--glow)}
.swatch .info{position:absolute;inset:auto 8px 8px 8px;background:rgba(0,0,0,.35);backdrop-filter:blur(4px);border-radius:10px;padding:6px 8px;font-size:12px;display:flex;justify-content:space-between;gap:6px;align-items:center}
.swatch .copy{font-size:11px;opacity:.85;cursor:pointer}
.palette-actions{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap}

.contrast-grid{display:grid;grid-template-columns:360px 1fr;gap:16px}
.contrast-controls{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;align-content:start}
.contrast-controls .control-group{grid-column:span 1}
.contrast-controls .ratio{font-weight:600}
.badge{padding:8px 10px;border-radius:10px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.08)}

.contrast-preview{border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:16px;background:linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.04));box-shadow:var(--glow)}
.contrast-preview h3{margin-top:0}
.demo-btn{margin-top:6px}
.mock-section .mock{display:grid;gap:16px}
.mock-hero{padding:24px;border:1px solid rgba(255,255,255,.12);border-radius:16px;background:radial-gradient(500px 300px at 15% -20%, rgba(167,139,250,.18), transparent), rgba(255,255,255,.04);box-shadow:var(--glow)}
.mock-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.mock-card{padding:16px;border:1px solid rgba(255,255,255,.12);border-radius:16px;background:rgba(255,255,255,.04)}
.mock-card .mini{height:34px}

.foot{text-align:center;color:var(--muted);font-size:13px}

@media(max-width:980px){
  .controls{grid-template-columns:repeat(6,1fr)}
  .control-group{grid-column:span 3}
  .control-group.small{grid-column:span 2}
  .palette-section .swatches{grid-template-columns:repeat(3,1fr)}
  .contrast-grid{grid-template-columns:1fr}
}