*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#6C5CE7;--primary-light:#A29BFE;--accent:#00CEC9;
  --bg:#0B0E11;--bg-card:rgba(20,24,32,0.85);
  --bg-input:rgba(15,18,25,0.8);--text:#E8E6F0;--text-dim:#8B8AA0;
  --text-muted:#5A5872;--border:rgba(108,92,231,0.15);
  --border-hover:rgba(108,92,231,0.35);--success:#00B894;
  --danger:#FF6B6B;--warning:#FDCB6E;--radius:12px;--radius-sm:8px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  --mono:'JetBrains Mono','SFMono-Regular','Consolas',monospace;
  --transition:250ms ease;--shadow:0 4px 24px rgba(0,0,0,0.3);
  --glass-bg:rgba(20,24,32,0.6);--glass-border:rgba(255,255,255,0.06)
}
html{font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 20% 15%,rgba(108,92,231,0.08) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(0,206,201,0.05) 0%,transparent 50%);pointer-events:none;z-index:0}
.app{position:relative;z-index:1;display:flex;flex-direction:column;min-height:100vh}
.header{padding:1rem 2rem;border-bottom:1px solid var(--border);background:var(--glass-bg);backdrop-filter:blur(20px);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.75rem}
.header-brand{display:flex;align-items:center;gap:.75rem}
.header-brand h1{font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,var(--primary-light),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{font-size:.78rem;color:var(--text-dim)}
.api-status{font-size:.78rem;padding:.3rem .7rem;border-radius:99px}
.api-status.supported{background:rgba(0,184,148,0.15);color:var(--success)}
.api-status.unsupported{background:rgba(255,107,107,0.15);color:var(--danger)}
.main{flex:1;padding:1.5rem 2rem}
.layout{display:grid;grid-template-columns:320px 1fr;gap:1.5rem;align-items:start}
.glass-card{background:var(--glass-bg);backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:1.25rem;margin-bottom:1rem}
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.75rem}
.section-title{font-size:.9rem;font-weight:700;color:var(--primary-light)}
.section-label{font-size:.8rem;font-weight:600;color:var(--text-dim);margin-bottom:.5rem}
.pick-btn{width:100%;padding:.75rem;display:flex;align-items:center;justify-content:center;gap:.5rem;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border:none;border-radius:var(--radius-sm);font-size:.9rem;font-weight:700;font-family:var(--font);cursor:pointer;transition:all var(--transition);box-shadow:0 2px 16px rgba(108,92,231,0.3);margin-bottom:1rem}
.pick-btn:hover{transform:translateY(-2px);box-shadow:0 4px 24px rgba(108,92,231,0.4)}
.pick-btn:active{transform:scale(.98)}
.color-preview{margin-bottom:1rem}
.color-swatch{width:100%;aspect-ratio:2/1;border-radius:var(--radius);border:2px solid var(--glass-border);transition:background 300ms ease}
.format-row{display:flex;align-items:center;gap:.5rem;padding:.45rem .5rem;border-bottom:1px solid var(--glass-border);transition:background var(--transition)}
.format-row:last-child{border-bottom:none}
.format-row:hover{background:rgba(255,255,255,0.02)}
.format-label{font-size:.72rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;width:48px;flex-shrink:0}
.format-value{flex:1;font-family:var(--mono);font-size:.82rem;color:var(--text)}
.copy-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:.3rem;border-radius:4px;transition:all 150ms ease;flex-shrink:0}
.copy-btn:hover{color:var(--accent);background:rgba(0,206,201,0.1)}
.contrast-section{margin-top:1rem;padding-top:.75rem;border-top:1px solid var(--glass-border)}
.contrast-row{display:flex;align-items:center;gap:.6rem;margin-bottom:.5rem}
.contrast-sample{width:36px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:4px;font-size:.75rem;font-weight:700;border:1px solid var(--glass-border)}
.contrast-ratio{font-family:var(--mono);font-size:.82rem;min-width:50px}
.contrast-grade{font-size:.72rem;font-weight:600;padding:.15rem .4rem;border-radius:4px}
.contrast-grade.pass{background:rgba(0,184,148,0.15);color:var(--success)}
.contrast-grade.fail{background:rgba(255,107,107,0.15);color:var(--danger)}
.color-history{display:flex;flex-wrap:wrap;gap:.4rem}
.history-chip{width:32px;height:32px;border-radius:6px;border:2px solid transparent;cursor:pointer;transition:all 150ms ease;position:relative}
.history-chip:hover{transform:scale(1.15);border-color:var(--primary-light);z-index:2}
.palette-grid{display:flex;flex-wrap:wrap;gap:.4rem}
.palette-swatch{width:48px;height:48px;border-radius:var(--radius-sm);border:2px solid var(--glass-border);cursor:pointer;position:relative;transition:all 150ms ease}
.palette-swatch:hover{transform:scale(1.08);border-color:var(--primary-light)}
.palette-swatch .remove-swatch{position:absolute;top:-6px;right:-6px;width:16px;height:16px;background:var(--danger);border:none;border-radius:50%;color:#fff;font-size:10px;cursor:pointer;display:none;align-items:center;justify-content:center;line-height:1}
.palette-swatch:hover .remove-swatch{display:flex}
.hint{font-size:.78rem;color:var(--text-muted);margin-top:.5rem}
.btn{display:inline-flex;align-items:center;gap:.35rem;padding:.5rem 1rem;border:none;border-radius:var(--radius-sm);font-size:.82rem;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--transition)}
.btn-accent{background:rgba(0,206,201,0.15);color:var(--accent);border:1px solid rgba(0,206,201,0.2)}
.btn-accent:hover{background:rgba(0,206,201,0.25)}
.btn-ghost{background:transparent;color:var(--text-dim);padding:.4rem .6rem}
.btn-ghost:hover{color:var(--text);background:rgba(255,255,255,0.05)}
.btn-sm{font-size:.75rem;padding:.3rem .5rem}
.footer{padding:1rem 2rem;text-align:center;font-size:.78rem;color:var(--text-muted);border-top:1px solid var(--border)}
.toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:200;display:flex;flex-direction:column;gap:.5rem}
.toast{background:var(--bg-card);border:1px solid var(--border);border-left:3px solid var(--accent);backdrop-filter:blur(20px);border-radius:var(--radius-sm);padding:.75rem 1rem;font-size:.82rem;color:var(--text);box-shadow:0 8px 40px rgba(0,0,0,0.4);animation:slideIn 300ms ease;max-width:320px}
.hidden{display:none !important}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(108,92,231,0.3);border-radius:3px}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
@media(max-width:768px){.layout{grid-template-columns:1fr}.main{padding:1rem}.header{padding:1rem}}