/* ===============================================
   Authentication CSS for SyntheticPortal
   Clean, modern login/registration interface
   =============================================== */

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.auth-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /* Fallback background */
    background-color: #1a1a1a;
    /* Main background with image */
    background: 
        linear-gradient(
            135deg,
            rgba(99, 102, 241, 0.8) 0%,
            rgba(139, 92, 246, 0.6) 50%,
            rgba(26, 26, 26, 0.9) 100%
        ),
        url('../wwwroot/login_background.png'),
        /* Fallback gradient if image fails */
        linear-gradient(
            135deg,
            var(--accent-primary) 0%,
            var(--accent-secondary) 50%,
            var(--bg-primary) 100%
        );
    background-size: cover, cover, 100% 100%;
    background-position: center, center, center;
    background-repeat: no-repeat, no-repeat, no-repeat;
    background-attachment: fixed, fixed, scroll;
    z-index: -2;
}

.auth-background-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 119, 198, 0.2) 0%, transparent 50%);
    z-index: -1;
}

.auth-content {
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-xl);
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    position: relative;
    z-index: 1;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.auth-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.auth-title i {
    color: var(--accent-primary);
    font-size: var(--font-size-xl);
}

.auth-subtitle {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin: 0;
}

.auth-form {
    transition: all var(--transition-normal);
}

.auth-form.hidden {
    display: none;
}

/* Custom checkbox */
.checkbox-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.checkbox-container input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    position: relative;
    transition: all var(--transition-fast);
}

.checkbox-container:hover .checkmark {
    border-color: var(--accent-primary);
}

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

.checkbox-container input[type="checkbox"]:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: translate(-50%, -60%) rotate(45deg);
}

/* Button loading states */
.login-button.loading .btn-text,
.register-button.loading .btn-text {
    opacity: 0;
}

.login-button.loading .btn-loader,
.register-button.loading .btn-loader {
    display: inline-flex !important;
}

.btn-loader {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

/* Link buttons */
.btn-link {
    background: none;
    border: none;
    color: var(--accent-primary);
    text-decoration: underline;
    cursor: pointer;
    font-size: inherit;
    font-family: inherit;
    padding: 0;
    transition: color var(--transition-fast);
}

.btn-link:hover {
    color: var(--accent-secondary);
}

/* Divider */
.auth-divider {
    display: flex;
    align-items: center;
    margin: var(--spacing-lg) 0;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border-color);
}

.auth-divider span {
    padding: 0 var(--spacing-md);
}

/* Google Sign In Button */
.google-signin-button {
    margin: var(--spacing-md) 0;
    border-radius: var(--border-radius) !important;
}

/* Auth footer */
.auth-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* Textarea enhancement */
textarea.form-input {
    min-height: 80px;
    resize: vertical;
    font-family: inherit;
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

/* Notifications */
.error-notification,
.success-notification {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    max-width: 400px;
    z-index: 10000;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
}

.error-notification {
    background-color: var(--accent-error);
}

.success-notification {
    background-color: var(--accent-success);
}

.error-content,
.success-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: white;
}

.error-close,
.success-close {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-fast);
    margin-left: auto;
}

.error-close:hover,
.success-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Animations */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.auth-content {
    animation: fadeInUp 0.6s ease;
}

/* Background image optimizations */
@media (max-width: 768px) {
    .auth-background {
        background-attachment: scroll; /* Better performance on mobile */
        background-size: cover;
    }
}

@media (prefers-reduced-motion: reduce) {
    .auth-background {
        background-attachment: scroll;
    }
}

/* High resolution displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .auth-background {
        background-image: 
            linear-gradient(
                135deg,
                rgba(99, 102, 241, 0.8) 0%,
                rgba(139, 92, 246, 0.6) 50%,
                rgba(26, 26, 26, 0.9) 100%
            ),
            url('../wwwroot/login_background.png');
    }
}

/* Responsive design */
@media (max-width: 768px) {
    .auth-content {
        margin: var(--spacing-md);
        padding: var(--spacing-lg);
        max-width: none;
    }
    
    .auth-title {
        font-size: var(--font-size-xl);
    }
    
    .error-notification,
    .success-notification {
        left: var(--spacing-md);
        right: var(--spacing-md);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .auth-content {
        margin: var(--spacing-sm);
        padding: var(--spacing-md);
    }
    
    .auth-header {
        margin-bottom: var(--spacing-lg);
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .auth-content {
        border-width: 2px;
    }
    
    .checkmark {
        border-width: 3px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .auth-content,
    .error-notification,
    .success-notification {
        animation: none;
    }
    
    .btn,
    .checkmark,
    .btn-link {
        transition: none;
    }
}

/* Focus enhancements */
.checkbox-container:focus-within .checkmark {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Password strength indicator (future enhancement) */
.password-strength {
    margin-top: var(--spacing-xs);
    height: 4px;
    border-radius: 2px;
    background-color: var(--bg-accent);
    overflow: hidden;
}

.password-strength-bar {
    height: 100%;
    transition: all var(--transition-normal);
    border-radius: 2px;
}

.password-strength-weak { background-color: var(--accent-error); width: 33%; }
.password-strength-medium { background-color: var(--accent-warning); width: 66%; }
.password-strength-strong { background-color: var(--accent-success); width: 100%; }