:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--bg: #0f1419;--header-bg: #131b24;--sidebar-bg: #0d1218;--surface: #1a2332;--surface-hover: #243044;--border: #2d3a4d;--border-hover: #3d4f66;--text: #e6edf3;--text-muted: #8b9cb3;--accent: #2d7d4a;--viewer-bg: #0a0e12;--viewer-shadow: 0 8px 32px rgba(0, 0, 0, .35)}@media(prefers-color-scheme:light){:root{--bg: #f0f4f8;--header-bg: #e8eef4;--sidebar-bg: #e2e8f0;--surface: #fff;--surface-hover: #e8eef4;--border: #cbd6e2;--border-hover: #a8b8cc;--text: #1a2332;--text-muted: #5a6c7d;--accent: #1e6b3a;--viewer-bg: #e2e8f0;--viewer-shadow: 0 4px 20px rgba(0, 0, 0, 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input{accent-color:var(--accent)}.logo-upload{flex-wrap:wrap;gap:.5rem}.upload-btn{padding:.4rem .75rem;border-radius:6px;border:1px dashed var(--border);background:var(--surface-hover);font-size:.875rem;cursor:pointer;transition:border-color .15s,background .15s}.upload-btn:hover{border-color:var(--accent);background:var(--bg)}.clear-btn{padding:.3rem .6rem;font-size:.8rem;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--text-muted);cursor:pointer}.clear-btn:hover{color:var(--text);border-color:var(--text-muted)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}.specs-panel{background:var(--surface);border-radius:10px;padding:1rem;border:1px solid var(--border)}.specs-panel h3{margin:0 0 .75rem;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}.specs-panel dl{margin:0}.specs-panel 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