:root{--bg-primary:#0a0a0f;--bg-secondary:#12121a;--bg-surface:#1a1a26;--border:#2a2a3a;--text-primary:#e8e8f0;--text-secondary:#9898a8;--text-muted:#66667a;--accent:#4285f4;--accent-subtle:#4285f41a;--accent-glow:#4285f44d;--red:#ea4335;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--shadow-sm:0 2px 8px #0000004d;--shadow-lg:0 16px 48px #00000080;--transition:.15s ease;--font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font);background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased}body{min-height:100vh}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app{max-width:960px;margin:0 auto;padding:40px 24px 80px}.top-buttons{z-index:100;gap:8px;display:flex;position:fixed;top:20px;right:24px}.about-btn{color:var(--text-muted);background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);padding:8px 16px;font-family:inherit;font-size:.8rem;font-weight:500}.about-btn:hover{color:var(--text-primary);border-color:var(--accent);background:var(--accent-subtle)}.about-btn.highlight{color:var(--accent);border-color:var(--accent);background:var(--accent-subtle);box-shadow:0 0 12px var(--accent-glow)}.about-btn.highlight:hover{box-shadow:0 0 20px var(--accent-glow);background:#4285f433}.header{text-align:center;margin-bottom:32px}.logo{letter-spacing:-.03em;background:linear-gradient(135deg,#4285f4,#a78bfa);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:2rem;font-weight:700}.subtitle{color:var(--text-secondary);margin-top:8px;font-size:.95rem;line-height:1.6}.subtitle-links{color:var(--text-muted);margin-top:6px;font-size:.8rem}.mode-tabs{background:var(--bg-secondary);border:1px solid 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