body { font-family: -apple-system, Segoe UI, Roboto, sans-serif; background:#0f1220; color:#eef0f7;
       margin:0; padding:0; display:flex; min-height:100vh; align-items:center; justify-content:center; }
.card { background:#1a1e33; border-radius:20px; padding:32px; max-width:420px; width:90%;
        box-shadow:0 20px 60px rgba(0,0,0,.4); text-align:center; }
.card img { width:100%; border-radius:14px; margin-bottom:20px; }
h1 { font-size:22px; margin:0 0 8px; }
.price { font-size:36px; font-weight:800; color:#6ea8fe; margin:12px 0 24px; }
button, .btn { background:#6ea8fe; color:#0f1220; border:none; border-radius:12px; padding:16px 24px;
       font-size:17px; font-weight:700; width:100%; cursor:pointer; text-decoration:none; display:block; }
button:hover, .btn:hover { background:#8ec0ff; }
.note { font-size:13px; color:#9aa1c0; margin-top:16px; line-height:1.5; }
.error { color:#ff6b6b; margin:16px 0; }