:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

.auth-container {
    max-width: 450px;
    margin: 50px auto;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header h2 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 10px;
}

.auth-header p {
    color: var(--secondary-color);
    margin: 0;
}

.form-label {
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.form-control {
    border-radius: 5px;
    border: 1px solid #ddd;
    padding: 10px 15px;
    transition: all 0.3s;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.btn-primary {
    border-radius: 5px;
    padding: 10px 30px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.alert {
    border-radius: 5px;
    border: none;
}

.input-group-text {
    background-color: #f8f9fa;
    border: 1px solid #ddd;
}

.navbar-brand {
    font-size: 1.5rem;
}

.navbar-brand i {
    margin-right: 8px;
}

footer {
    margin-top: auto;
}

.divider {
    text-align: center;
    margin: 20px 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background: #ddd;
}

.divider span {
    background: white;
    padding: 0 15px;
    position: relative;
    color: var(--secondary-color);
}

.social-login {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.social-btn {
    flex: 1;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    background: white;
    transition: all 0.3s;
}

.social-btn:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
}