*{margin:0;padding:0;box-sizing:border-box}:root{--bg-color: #0f172a;--card-color: #020617;--primary: #38bdf8;--text-color: #e5e7eb;--muted-text: #94a3b8}body{font-family:Inter,sans-serif;background:linear-gradient(135deg,#020617,#0f172a);color:var(--text-color);min-height:100vh}.container{min-height:100vh;display:flex;justify-content:center;align-items:center;padding:2rem}.card{background-color:var(--card-color);padding:3rem;max-width:480px;width:100%;border-radius:16px;box-shadow:0 20px 40px #00000080;text-align:center}h1{font-size:2.2rem;font-weight:700;margin-bottom:1rem}p{color:var(--muted-text);font-size:1rem;line-height:1.6;margin-bottom:2rem}button{background-color:var(--primary);color:#020617;border:none;padding:.8rem 1.6rem;font-size:1rem;font-weight:600;border-radius:8px;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}button:hover{transform:translateY(-2px);box-shadow:0 10px 20px #38bdf84d}