/* Authentication Styles */
.auth-form {
    width: 100%;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
    gap: var(--space-2);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--gray-700);
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.checkmark {
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    position: relative;
    transition: var(--transition);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background-color: var(--primary);
    border-color: var(--primary);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
}

.forgot-link {
    color: var(--primary);
    font-size: 0.875rem;
    text-decoration: none;
    transition: var(--transition);
}

.forgot-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.auth-switch {
    text-align: center;
    margin-top: var(--space-4);
    color: var(--gray-600);
    font-size: 0.875rem;
}

.auth-switch a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.auth-switch a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Form Validation */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: var(--error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group .error-message {
    color: var(--error);
    font-size: 0.875rem;
    margin-top: var(--space-1);
    display: block;
}

.form-group.success input,
.form-group.success select,
.form-group.success textarea {
    border-color: var(--success);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* Loading State */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1rem;
    height: 1rem;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    color: var(--white);
}

/* Password Strength Indicator */
.password-strength {
    margin-top: var(--space-2);
}

.strength-bar {
    height: 0.25rem;
    background-color: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    transition: var(--transition);
    border-radius: var(--radius-full);
}

.strength-fill.weak {
    width: 25%;
    background-color: var(--error);
}

.strength-fill.fair {
    width: 50%;
    background-color: var(--accent);
}

.strength-fill.good {
    width: 75%;
    background-color: var(--primary);
}

.strength-fill.strong {
    width: 100%;
    background-color: var(--success);
}

.strength-text {
    font-size: 0.75rem;
    margin-top: var(--space-1);
    color: var(--gray-600);
}

/* Social Login Buttons */
.social-login {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--gray-200);
}

.social-login p {
    text-align: center;
    color: var(--gray-600);
    font-size: 0.875rem;
    margin-bottom: var(--space-4);
}

.social-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    background-color: var(--white);
    color: var(--gray-700);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.social-btn:hover {
    background-color: var(--gray-50);
    border-color: var(--gray-400);
    color: var(--gray-900);
}

.social-btn svg {
    width: 1.25rem;
    height: 1.25rem;
}

/* Responsive Design */
@media (max-width: 480px) {
    .modal-content {
        margin: var(--space-4);
        max-width: none;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
    
    .social-buttons {
        gap: var(--space-2);
    }
    
    .social-btn {
        padding: var(--space-2) var(--space-3);
        font-size: 0.875rem;
    }
}