*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f1117;--surface: #1a1d27;--surface-2: #22263a;--border: rgba(255,255,255,.08);--header-bg: rgba(26,29,39,.8);--footer-bg: rgba(26,29,39,.8);--checker-a: rgba(255,255,255,.02);--checker-b: transparent;--panel-hover-border: rgba(255,255,255,.14);--accent: #6366f1;--accent-2: #8b5cf6;--accent-glow: rgba(99,102,241,.35);--text: #e8eaf6;--text-muted: #6b7280;--success: #10b981;--radius: 12px}body.light{--bg: #f4f5f9;--surface: #ffffff;--surface-2: #eef0f6;--border: rgba(0,0,0,.09);--header-bg: rgba(255,255,255,.85);--footer-bg: rgba(255,255,255,.85);--checker-a: rgba(0,0,0,.03);--checker-b: transparent;--panel-hover-border: rgba(0,0,0,.16);--text: #111827;--text-muted: #6b7280;--success: 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span:nth-child(2){animation-delay:.2s}#spinner span:nth-child(3){animation-delay:.4s}@keyframes pulse{0%,80%,to{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}#download-btn{display:flex;align-items:center;gap:7px;padding:8px 18px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border:none;border-radius:8px;cursor:pointer;font-size:.85rem;font-weight:500;letter-spacing:.01em;white-space:nowrap;transition:opacity .15s,box-shadow .15s,transform .1s;box-shadow:0 2px 12px #6366f166}#download-btn svg{width:14px;height:14px;fill:#fff;flex-shrink:0}#download-btn:hover{opacity:.92;box-shadow:0 4px 20px #6366f18c;transform:translateY(-1px)}#download-btn:active{transform:translateY(0)}#theme-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid var(--border);border-radius:8px;background:var(--surface-2);color:var(--text-muted);cursor:pointer;transition:background .15s,border-color .15s,color 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