:root{--bg: #0f1117;--surface: #181c26;--surface2:#1e2433;--border: #2a3047;--accent: #4f7cff;--success: #34d399;--danger: #f87171;--warning: #fbbf24;--text: #e8ecf4;--muted: #6b7699;--radius: 10px}[data-theme=light]{--bg: #f0f4f8;--surface: #ffffff;--surface2:#f1f5f9;--border: #d1d9e6;--accent: #3b6fd4;--success: #059669;--danger: #dc2626;--warning: #d97706;--text: #1e2a3a;--muted: #64748b}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,sans-serif;min-height:100vh;-webkit-tap-highlight-color:transparent}h1{font-size:1.6rem;font-weight:700}h2{font-size:1.2rem;font-weight:600}h3{font-size:1rem;font-weight:600}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.55rem 1.2rem;border-radius:var(--radius);border:none;font-size:.95rem;font-weight:600;cursor:pointer;transition:opacity .15s,transform 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