/* SnapLab Interactive Learning Platform - Main Styles */

/* Import feedback modal styles */
@import url('feedback-modal.css');

/* CSS Variables */
:root {
    /* Colors - Based on SnapLab logo */
    --primary-teal: #2D7D7D;
    --primary-burgundy: #8B2635;
    --primary-blue: #1E3A8A;
    --primary-red: #DC2626;
    
    /* UI Colors */
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --surface-elevated: #FFFFFF;
    --border: #E5E7EB;
    --border-light: #F3F4F6;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    
    /* Status Colors */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-teal), var(--primary-burgundy));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
    color: white;
}

.snaplab-logo {
    margin-bottom: var(--spacing-xl);
    display: flex;
    justify-content: center;
}

.snaplab-logo-img {
    height: 120px;
    width: auto;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.25));
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: var(--spacing-lg) auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Main App Layout */
.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.snaplab-logo-small {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.snaplab-logo-small:hover {
    opacity: 0.8;
}

.snaplab-logo-small-img {
    height: 36px;
    width: auto;
}

.session-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.session-id {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-family: monospace;
}

.case-name {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 500;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: #236B6B;
    border-color: #236B6B;
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--border-light);
}

.btn-tertiary {
    background: transparent;
    color: var(--primary-teal);
    border-color: var(--primary-teal);
}

.btn-tertiary:hover:not(:disabled) {
    background: var(--primary-teal);
    color: white;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
}

.btn .icon {
    font-size: var(--font-size-sm);
}

/* Profile Selection */
.profile-selection {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, #F8FAFC 0%, #E2E8F0 100%);
}

.profile-container {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 100%;
}

.profile-container h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-teal);
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.profile-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-teal);
    box-shadow: 0 0 0 3px rgba(45, 125, 125, 0.1);
}

.form-help {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.profile-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.profile-option {
    padding: var(--spacing-lg);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.profile-option:hover {
    border-color: var(--primary-teal);
    background: rgba(45, 125, 125, 0.05);
}

.profile-option.selected {
    border-color: var(--primary-teal);
    background: rgba(45, 125, 125, 0.1);
}

.profile-icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.profile-option h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.profile-option p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.case-selection {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.case-option {
    padding: var(--spacing-lg);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.case-option:hover {
    border-color: var(--primary-teal);
}

.case-option.selected {
    border-color: var(--primary-teal);
    background: rgba(45, 125, 125, 0.05);
}

.case-option h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.case-option p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.case-meta {
    display: flex;
    gap: var(--spacing-md);
}

.case-meta span {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--border-light);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

.case-option-disabled {
    opacity: 0.55;
    filter: grayscale(0.7);
    pointer-events: none;
    cursor: not-allowed;
}

.case-option-disabled:hover {
    border-color: var(--border);
}

.case-badge {
    display: inline-block;
    margin-left: var(--spacing-sm);
    padding: 2px var(--spacing-sm);
    background: var(--border-light);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    font-style: italic;
    vertical-align: middle;
}

/* Main Interface Layout */
.main-interface {
    flex: 1;
    display: grid;
    grid-template-columns: 300px 350px 1fr;
    grid-template-rows: 1fr;
    gap: 1px;
    background: var(--border);
    min-height: calc(100vh - 73px); /* Subtract header height */
}

/* Responsive Design */
@media (max-width: 1200px) {
    .main-interface {
        grid-template-columns: 280px 320px 1fr;
    }
}

@media (max-width: 1024px) {
    .main-interface {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto 1fr;
    }
    
    .timeline-panel,
    .character-panel {
        max-height: 300px;
        overflow-y: auto;
    }
}

@media (max-width: 768px) {
    .app-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .header-left {
        gap: var(--spacing-md);
    }
    
    .session-info {
        display: none;
    }
    
    .profile-container {
        padding: var(--spacing-lg);
        margin: var(--spacing-md);
    }
    
    .profile-options {
        grid-template-columns: 1fr;
    }
}

/* Debug Mode */
.debug-only {
    display: none;
}

body.debug-mode .debug-only {
    display: inline-flex;
}

/* Notifications */
.notifications {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.notification {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    animation: slideIn 0.3s ease-out;
}

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

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

.notification.warning {
    background: var(--warning);
    color: white;
}

.notification.info {
    background: var(--info);
    color: white;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--spacing-xs);
}

.modal-body {
    padding: var(--spacing-lg);
    flex: 1;
    overflow-y: auto;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}