body {
    margin: 0;
    padding: 0;
    font-family: Inter, sans-serif;
    background: #f5f7fa;
    color: #1e293b;
}

.container {
    max-width: 420px;
    margin: 0 auto;
    padding: 40px 20px;
}

h1, h2 {
    margin-bottom: 10px;
    font-weight: 600;
}

p {
    color: #475569;
}

.card {
    background: white;
    border-radius: 14px;
    padding: 20px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
    border: 1px solid rgba(0,0,0,0.06);
    margin-top: 20px;
}

.btn {
    display: block;
    width: 100%;
    padding: 12px;
    margin-top: 25px;
    background: #22c2b1;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    color: white;
    transition: background .2s;
}

.btn:hover {
    background: #19b4a3;
}

a.btn {
    text-decoration: none;
    text-align: center;
}