:root{--bg-primary: #0f172a;--bg-card: #1e293b;--bg-overlay: rgba(0, 0, 0, .85);--text-primary: #f8fafc;--text-secondary: #94a3b8;--accent: #6366f1;--accent-hover: #4f46e5;--success: #10b981;--error: #ef4444;--warning: #f59e0b}body{margin:0;font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased}.container{max-width:900px;margin:0 auto;padding:2rem 1rem}.card{background:var(--bg-card);border-radius:12px;padding:1.5rem;margin-bottom:1.5rem;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}h1,h2,h3{margin-top:0;font-weight:700;letter-spacing:-.025em}h1{font-size:1.875rem;background:linear-gradient(to right,#818cf8,#c084fc);-webkit-background-clip:text;background-clip:text;color:transparent}input{width:100%;padding:.75rem;border-radius:.5rem;border:1px solid #334155;background:#020617;color:#fff;margin-bottom:1rem;box-sizing:border-box;font-size:1rem;transition:border-color .2s}input:focus{outline:none;border-color:var(--accent)}.btn{display:inline-flex;align-items:center;justify-content:center;width:100%;padding:.75rem 1rem;border:none;border-radius:.5rem;background:var(--accent);color:#fff;font-weight:600;font-size:1rem;cursor:pointer;transition:all .2s;text-decoration:none;box-sizing:border-box}.btn:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px)}.btn:active:not(:disabled){transform:translateY(0)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:#334155;color:#fff}.btn-secondary:hover{background:#475569}.btn-outline{background:transparent;border:1px solid var(--accent);color:var(--accent)}.btn-danger{background:var(--error);color:#fff}.tag{display:inline-block;font-size:.75rem;font-weight:700;text-transform:uppercase;padding:.25rem .5rem;border-radius:9999px}.tag.valid{background:#10b9811a;color:var(--success)}.tag.used{background:#ef44441a;color:var(--error);text-decoration:line-through}.qr-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:1rem}.qr-card{background:#fff;padding:1rem;border-radius:.5rem;text-align:center;color:#000;cursor:pointer;transition:transform .2s}.qr-card:hover{transform:scale(1.02)}.scan-overlay{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;background:var(--bg-overlay);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);padding:1rem}@media print{body{background:#fff;color:#000}.no-print{display:none!important}.qr-card{border:1px solid #ccc;break-inside:avoid;box-shadow:none}.card{box-shadow:none;border:1px solid #eee}}