body{margin:0;font-family:system-ui;background:#eef3ff;display:grid;place-items:center;height:100vh}.bg{position:fixed;inset:0;background:radial-gradient(circle at 20% 20%,#8ec5ff,transparent 30%),radial-gradient(circle at 80% 70%,#cba6ff,transparent 35%),#eef3ff}.card{position:relative;backdrop-filter:blur(18px);background:rgba(255,255,255,.6);padding:32px;border-radius:24px;box-shadow:0 10px 30px rgba(0,0,0,.15);text-align:center;max-width:360px;width:90%}.car{font-size:52px}.btn{display:block;margin:12px 0;padding:14px;border-radius:14px;text-decoration:none;border:none;background:#fff}.primary{background:linear-gradient(90deg,#2563eb,#3b82f6);color:#fff}#num{font-size:28px;font-weight:700;margin:20px}#toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:#222;color:#fff;padding:10px 16px;border-radius:99px;opacity:0;transition:.3s}@media(prefers-color-scheme:dark){body{background:#111}.card{background:rgba(30,30,30,.55);color:#fff}.btn{background:#333;color:#fff}}