/* ====================================
   AUTH CSS - Authentication-specific Styles
   ==================================== */

/* ====================================
   Layout Components
   ==================================== */

.auth-page {
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.auth-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-4);
}

.auth-header {
    text-align: center;
    padding: var(--space-8) 0 var(--space-6) 0;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.logo-image {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: var(--primary-600);
    padding: var(--space-2);
    color: white;
}

.logo h1 {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

.auth-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) 0;
}

.auth-footer {
    text-align: center;
    padding: var(--space-6) 0 var(--space-4) 0;
    color: var(--gray-500);
    font-size: var(--text-sm);
}

/* ====================================
   Auth Card Component
   ==================================== */

.auth-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
    padding: var(--space-8);
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
}

.auth-card-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-card-header h2 {
    font-size: var(--text-3xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
    line-height: 1.2;
}

.auth-subtitle {
    color: var(--gray-600);
    font-size: var(--text-base);
    line-height: 1.5;
    margin: 0;
}

.auth-card-footer {
    text-align: center;
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--gray-100);
}

.auth-card-footer p {
    color: var(--gray-600);
    font-size: var(--text-sm);
    margin: 0;
}

/* ====================================
   Form Components
   ==================================== */

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    display: flex;
    align-items: center;
    font-weight: 500;
    color: var(--gray-700);
    font-size: var(--text-sm);
    margin-bottom: var(--space-1);
}

.required {
    color: var(--error-500);
    margin-left: var(--space-1);
    font-weight: 400;
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--gray-900);
    background-color: white;
    transition: all var(--transition-fast);
    outline: none;
}

.form-input::placeholder {
    color: var(--gray-400);
}

.form-input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input:invalid:not(:placeholder-shown) {
    border-color: var(--error-500);
}

.form-input.error {
    border-color: var(--error-500);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-input.success {
    border-color: var(--success-500);
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

/* Password Input Wrapper */
.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-wrapper .form-input {
    padding-right: var(--space-12);
}

.password-toggle {
    position: absolute;
    right: var(--space-3);
    background: none;
    border: none;
    padding: var(--space-1);
    cursor: pointer;
    color: var(--gray-400);
    font-size: var(--text-lg);
    border-radius: var(--radius);
    transition: color var(--transition-fast);
    outline: none;
}

.password-toggle:hover {
    color: var(--gray-600);
}

.password-toggle:focus {
    color: var(--primary-600);
    outline: 2px solid var(--primary-500);
    outline-offset: 1px;
}

.password-toggle-icon {
    display: inline-block;
    font-style: normal;
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: var(--space-2) 0;
    gap: var(--space-4);
}

/* Checkbox Component */
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    cursor: pointer;
    font-size: var(--text-sm);
    color: var(--gray-700);
    line-height: 1.5;
    position: relative;
}

.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    height: 18px;
    width: 18px;
    background-color: white;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    margin-top: 1px;
}

.checkbox-label:hover .checkmark {
    border-color: var(--primary-500);
}

.checkbox-label input:checked + .checkmark {
    background-color: var(--primary-600);
    border-color: var(--primary-600);
}

.checkbox-label input:checked + .checkmark::after {
    content: '✓';
    color: white;
    font-size: var(--text-xs);
    font-weight: bold;
}

.checkbox-label input:focus + .checkmark {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Links */
.auth-link {
    color: var(--primary-600);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.auth-link:hover {
    color: var(--primary-700);
    text-decoration: underline;
}

.auth-link:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
    border-radius: var(--radius);
}

.forgot-password-link {
    font-size: var(--text-sm);
    white-space: nowrap;
}

/* ====================================
   Button Components
   ==================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    font-weight: 500;
    line-height: 1.5;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    outline: none;
    position: relative;
    overflow: hidden;
    min-height: 48px;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-primary {
    background-color: var(--primary-600);
    color: white;
    border-color: var(--primary-600);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-700);
    border-color: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: white;
    color: var(--gray-700);
    border-color: var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-full {
    width: 100%;
}

.btn-text {
    transition: opacity var(--transition-fast);
}

.btn-spinner {
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.btn:disabled .btn-text {
    opacity: 0;
}

.btn:disabled .btn-spinner {
    opacity: 1;
}

/* ====================================
   Form Validation
   ==================================== */

.form-error {
    color: var(--error-600);
    font-size: var(--text-sm);
    margin-top: var(--space-1);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    line-height: 1.4;
}

.form-error:empty {
    display: none;
}

.form-error-general {
    background-color: var(--error-50);
    border: 1px solid var(--error-200);
    border-radius: var(--radius-lg);
    padding: var(--space-3) var(--space-4);
    margin-top: var(--space-4);
}

.form-success {
    color: var(--success-600);
    background-color: var(--success-50);
    border: 1px solid var(--success-200);
    border-radius: var(--radius-lg);
    padding: var(--space-3) var(--space-4);
    margin-top: var(--space-4);
    font-size: var(--text-sm);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* Password Requirements */
.password-requirements {
    background-color: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin-top: var(--space-2);
}

.requirements-title {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.requirements-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.requirement {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--gray-600);
    transition: color var(--transition-fast);
}

.req-icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xs);
    font-weight: bold;
    flex-shrink: 0;
}

.requirement.valid {
    color: var(--success-600);
}

.requirement.valid .req-icon {
    color: var(--success-600);
}

.requirement.valid .req-icon::before {
    content: '✓';
}

/* ====================================
   Loading and Toast Components
   ==================================== */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    z-index: var(--z-modal);
    backdrop-filter: blur(4px);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-600);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-overlay p {
    color: var(--gray-700);
    font-size: var(--text-lg);
    font-weight: 500;
}

/* Toast Notifications */
.toast {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
    padding: var(--space-4) var(--space-6);
    z-index: var(--z-toast);
    max-width: 400px;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.toast.show {
    transform: translateX(0);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: bold;
    flex-shrink: 0;
}

.toast-success .toast-icon {
    background-color: var(--success-100);
    color: var(--success-700);
}

.toast-error .toast-icon {
    background-color: var(--error-100);
    color: var(--error-700);
}

.toast-message {
    color: var(--gray-700);
    font-size: var(--text-sm);
    line-height: 1.4;
}

/* Success and Error State Cards */
.success-icon,
.error-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    font-weight: bold;
    margin: 0 auto var(--space-4);
}

.success-icon {
    background-color: var(--success-100);
    color: var(--success-600);
}

.error-icon {
    background-color: var(--error-100);
    color: var(--error-600);
}

/* ====================================
   Responsive Design
   ==================================== */

@media (max-width: 640px) {
    .auth-container {
        padding: var(--space-2);
    }
    
    .auth-card {
        padding: var(--space-6);
        margin: var(--space-2);
    }
    
    .auth-card-header h2 {
        font-size: var(--text-2xl);
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
    
    .logo {
        flex-direction: column;
        gap: var(--space-2);
    }
    
    .logo h1 {
        font-size: var(--text-xl);
    }
    
    .toast {
        left: var(--space-4);
        right: var(--space-4);
        top: var(--space-4);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .auth-container {
        padding: var(--space-1);
    }
    
    .auth-card {
        padding: var(--space-4);
        border-radius: var(--radius-lg);
    }
    
    .btn {
        padding: var(--space-4) var(--space-5);
        font-size: var(--text-sm);
    }
    
    .form-input {
        padding: var(--space-3);
        font-size: var(--text-sm);
    }
}

/* ====================================
   Focus Management and Accessibility
   ==================================== */

/* Skip to main content (for screen readers) */
.skip-to-main {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-600);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius);
    z-index: var(--z-tooltip);
}

.skip-to-main:focus {
    top: 6px;
}

/* High contrast mode improvements */
@media (prefers-contrast: high) {
    .auth-card {
        border: 2px solid var(--gray-900);
    }
    
    .form-input {
        border-width: 2px;
    }
    
    .btn-primary {
        border: 2px solid var(--gray-900);
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    .loading-spinner {
        animation: none;
    }
    
    .btn {
        transition: none;
    }
    
    .toast {
        transition: none;
    }
}