/* ...existing code... */
.btn {
    display: inline-block;
    background: #007bff;
    color: #fff;
    font-weight: 700;
    padding: 12px 28px;
    border-radius: 32px;
    text-decoration: none;
    font-size: 1rem;
    box-shadow: 0 2px 8px rgba(0,123,255,0.10);
    transition: background 0.2s;
}
.btn:hover {
    background: #0056b3;
}
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }
.text-center { text-align: center; }
/* ...existing code... */