body {
    background: linear-gradient(135deg, #004d40, #009688);
    color: #fff;
    font-family: 'Segoe UI', sans-serif;
}

.auth-card {
    background: #fff;
    color: #333;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    transition: all 0.5s ease;
    min-width: 360px;
    max-width: 400px;
}

.form-title {
    font-weight: bold;
    color: #00695c;
}

.form-control {
    border-radius: 10px;
}

.btn-primary {
    background-color: #00695c;
    border: none;
}

.btn-success {
    background-color: #00796b;
    border: none;
}

.form-toggle a {
    color: #00695c;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
}

.form-toggle a:hover {
    text-decoration: underline;
}

.input-group-text {
    background-color: #e0f2f1;
    border: none;
}

.fade-in {
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}