@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#6366F1;--primary-light:#818CF8;--primary-glow:rgba(99,102,241,.2);
  --accent:#22D3EE;--green:#22C55E;--red:#EF4444;--yellow:#F59E0B;
  --bg:#0F172A;--bg2:#1E293B;--bg-card:rgba(30,41,59,.8);
  --text:#F1F5F9;--text2:#94A3B8;--text3:#64748B;
  --border:rgba(148,163,184,.1);--radius:12px;--radius-sm:8px;
  --font:'Inter',system-ui,sans-serif;--tr:.25s ease;
}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 50% 0%,rgba(99,102,241,.05) 0%,transparent 50%);pointer-events:none}
.app{position:relative;z-index:1;max-width:800px;margin:0 auto;padding:24px 20px 60px}
.hdr{text-align:center;padding:40px 0 24px}
.hdr__icon{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:var(--radius);background:linear-gradient(135deg,var(--primary),var(--accent));font-size:32px;margin-bottom:16px;box-shadow:0 8px 30px var(--primary-glow);animation:fl 3s ease-in-out infinite}
@keyframes fl{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
.hdr h1{font-size:2rem;font-weight:800;background:linear-gradient(135deg,var(--text),var(--primary-light));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hdr p{color:var(--text2);font-size:.95rem;margin:8px auto 0}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;backdrop-filter:blur(16px);margin-bottom:16px}
.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;flex-wrap:wrap;gap:8px}
.card-title{font-size:.9rem;font-weight:700;margin-bottom:10px}
.picker-row{display:flex;gap:16px;flex-wrap:wrap;align-items:flex-end}
.picker-group{display:flex;flex-direction:column;gap:4px}
.picker-group label{font-size:.72rem;font-weight:600;color:var(--text3)}
.color-pick-wrap{display:flex;gap:6px;align-items:center}
input[type="color"]{width:44px;height:36px;border:none;border-radius:var(--radius-sm);cursor:pointer;padding:0;background:none}
input[type="color"]::-webkit-color-swatch-wrapper{padding:0}
input[type="color"]::-webkit-color-swatch{border:2px solid var(--border);border-radius:6px}
.select,.input{padding:8px 12px;font-family:var(--font);font-size:.82rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);outline:none}
.hex-input{width:82px;font-weight:600;text-transform:uppercase}
.btn{padding:9px 16px;font-family:var(--font);font-size:.82rem;font-weight:600;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:var(--tr)}
.btn-sm{padding:6px 12px;font-size:.75rem}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#4F46E5}
.btn-outline{background:transparent;color:var(--text2);border:1px solid var(--border)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
/* Palette */
.palette{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px}
.swatch{border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:var(--tr)}
.swatch:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(0,0,0,.3)}
.swatch-color{height:80px}
.swatch-info{background:var(--bg);padding:8px;text-align:center}
.swatch-hex{font-size:.78rem;font-weight:700}
.swatch-label{font-size:.68rem;color:var(--text3);margin-top:2px}
/* Contrast */
.contrast-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:8px}
.contrast-item{background:var(--bg);border-radius:var(--radius-sm);padding:10px;display:flex;align-items:center;gap:8px}
.contrast-dots{display:flex;gap:2px}
.contrast-dots .dot{width:20px;height:20px;border-radius:4px}
.contrast-ratio{font-size:.78rem;font-weight:700}
.contrast-rating{font-size:.68rem;border-radius:4px;padding:2px 6px;font-weight:600}
.rating-aaa{background:rgba(34,197,94,.1);color:var(--green)}
.rating-aa{background:rgba(245,158,11,.1);color:var(--yellow)}
.rating-fail{background:rgba(239,68,68,.1);color:var(--red)}
.code-area{padding:14px;font-family:'JetBrains Mono',monospace;font-size:.78rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--primary-light);overflow-x:auto;white-space:pre;line-height:1.6;max-height:300px;overflow-y:auto;margin:0}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);padding:10px 20px;background:var(--bg2);border:1px solid var(--primary);border-radius:var(--radius-sm);color:var(--text);font-size:.85rem;font-weight:500;z-index:1000;opacity:0;transition:all .3s ease;pointer-events:none}
.toast.visible{opacity:1;transform:translateX(-50%) translateY(0)}
@media(max-width:640px){.picker-row{flex-direction:column}.palette{grid-template-columns:repeat(2,1fr)}.contrast-grid{grid-template-columns:1fr}.app{padding:16px 12px 48px}.hdr h1{font-size:1.5rem}}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--bg2);border-radius:3px}
::selection{background:var(--primary);color:var(--bg)}