* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #0f172a;
    color: #e5e7eb;
    font-family: Arial, Helvetica, sans-serif;
}

.container {
    text-align: center;
    max-width: 700px;
    padding: 40px;
}

h1 {
    font-size: 3rem;
    margin-bottom: 10px;
}

h2 {
    font-weight: normal;
    color: #94a3b8;
    margin-bottom: 30px;
}

p {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 40px;
}

.btn {
    display: inline-block;
    padding: 14px 30px;
    background: #38bdf8;
    color: #020617;
    text-decoration: none;
    font-weight: bold;
    border-radius: 6px;
    transition: 0.2s ease;
}

.btn:hover {
    background: #0ea5e9;
}

.card {
    background: #020617;
    border: 1px solid #1e293b;
    border-radius: 10px;
    padding: 30px;
    margin-top: 30px;
    text-align: left;
}

.card h2 {
    margin-bottom: 10px;
}

.disabled {
    background: #334155;
    color: #94a3b8;
    cursor: not-allowed;
}