/* ============================================
   EGF Creator - Premium Design System
   ============================================ */

/* CSS Custom Properties */

:root
{
    /* Colors - HSL for easy manipulation */

    --primary-hue: 260;
    --primary-sat: 85%;
    --primary-light: 60%;
    
    --primary-100: hsl(var(--primary-hue), var(--primary-sat), 95%);
    --primary-200: hsl(var(--primary-hue), var(--primary-sat), 85%);
    --primary-300: hsl(var(--primary-hue), var(--primary-sat), 75%);
    --primary-400: hsl(var(--primary-hue), var(--primary-sat), 65%);
    --primary-500: hsl(var(--primary-hue), var(--primary-sat), var(--primary-light));
    --primary-600: hsl(var(--primary-hue), var(--primary-sat), 50%);
    --primary-700: hsl(var(--primary-hue), var(--primary-sat), 40%);
    
    --accent-hue: 320;
    --accent-500: hsl(var(--accent-hue), 80%, 60%);
    --accent-600: hsl(var(--accent-hue), 80%, 50%);
    
    --success: hsl(140, 70%, 55%);
    --warning: hsl(40, 95%, 60%);
    --error: hsl(0, 80%, 60%);
    --info: hsl(200, 85%, 60%);
    
    /* Neutrals - Dark theme */

    --bg-primary: hsl(240, 15%, 10%);
    --bg-secondary: hsl(240, 15%, 14%);
    --bg-tertiary: hsl(240, 15%, 18%);
    --bg-elevated: hsl(240, 15%, 22%);
    
    --text-primary: hsl(0, 0%, 98%);
    --text-secondary: hsl(0, 0%, 75%);
    --text-tertiary: hsl(0, 0%, 55%);
    
    --border-color: hsl(240, 15%, 25%);
    --border-focus: var(--primary-500);
    
    /* Spacing */

    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(var(--primary-hue), var(--primary-sat), var(--primary-light), 0.4);
    
    /* Transitions */

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

*
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body
{
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated gradient background */

body::before
{
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, hsla(var(--primary-hue), 85%, 30%, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, hsla(var(--accent-hue), 80%, 30%, 0.15) 0%, transparent 50%);
    z-index: -1;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift
{
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

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

.container
{
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-xl);
}

.header
{
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding: var(--space-xl) 0;
}

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

.logo h1
{
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-400), var(--accent-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease infinite;
}

@keyframes shimmer
{
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.2); }
}

.version
{
    font-size: 0.875rem;
    padding: 0.25rem 0.75rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
}

.subtitle
{
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* ============================================
   Tabs
   ============================================ */

.tab-nav
{
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    background: var(--bg-secondary);
    padding: var(--space-sm);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.tab-btn
{
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    border: none;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.tab-icon
{
    font-size: 1.25rem;
}

.tab-btn:hover
{
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.tab-btn.active
{
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    color: white;
    box-shadow: var(--shadow-glow);
}

.tab-content
{
    display: none;
    animation: fadeIn var(--transition-normal);
}

.tab-content.active
{
    display: block;
}

@keyframes fadeIn
{
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-content h2
{
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description
{
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    font-size: 1.0625rem;
}

/* Sub-tabs */

.sub-tab-nav
{
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    border-bottom: 2px solid var(--border-color);
}

.sub-tab-btn
{
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: -2px;
}

.sub-tab-btn:hover
{
    color: var(--text-primary);
}

.sub-tab-btn.active
{
    color: var(--primary-400);
    border-bottom-color: var(--primary-500);
}

.sub-tab-content
{
    display: none;
}

.sub-tab-content.active
{
    display: block;
    animation: fadeIn var(--transition-normal);
}

/* ============================================
   Forms
   ============================================ */

.form
{
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.form-row
{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

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

.form-group label
{
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.form-group.required label::after
{
    content: ' *';
    color: var(--error);
}

.form-group input,
.form-group textarea,
.form-group select
{
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9375rem;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    width: 100%;
    max-width: 100%;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus
{
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px hsla(var(--primary-hue), var(--primary-sat), var(--primary-light), 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder
{
    color: var(--text-tertiary);
}

.helper-text
{
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* ============================================
   Buttons
   ============================================ */

.btn
{
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.btn-primary
{
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover
{
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow), var(--shadow-lg);
}

.btn-primary:active
{
    transform: translateY(0);
}

.btn-secondary
{
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover
{
    background: var(--bg-elevated);
}

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

.btn-danger:hover
{
    filter: brightness(1.1);
}

.btn-large
{
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.125rem;
}

/* ============================================
   Alerts
   ============================================ */

.alert
{
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    border-left: 4px solid;
}

.alert-info
{
    background: hsla(200, 85%, 60%, 0.1);
    border-left-color: var(--info);
    color: var(--info);
}

.alert-warning
{
    background: hsla(40, 95%, 60%, 0.1);
    border-left-color: var(--warning);
    color: var(--warning);
}

.alert-success
{
    background: hsla(140, 70%, 55%, 0.1);
    border-left-color: var(--success);
    color: var(--success);
}

.alert-error
{
    background: hsla(0, 80%, 60%, 0.1);
    border-left-color: var(--error);
    color: var(--error);
}

.alert ul
{
    margin-left: var(--space-lg);
    margin-top: var(--space-xs);
}

/* ============================================
   Manifest Items
   ============================================ */

.manifest-items
{
    display: grid;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.manifest-item
{
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-normal);
}

.manifest-item:hover
{
    border-color: var(--primary-500);
    box-shadow: 0 0 15px hsla(var(--primary-hue), var(--primary-sat), var(--primary-light), 0.2);
}

.manifest-item-info
{
    flex: 1;
}

.manifest-item-title
{
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.manifest-item-meta
{
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.manifest-item-badge
{
    padding: 0.25rem 0.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.manifest-item-actions
{
    display: flex;
    gap: var(--space-sm);
}

.icon-btn
{
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.125rem;
}

.icon-btn:hover
{
    background: var(--bg-elevated);
    border-color: var(--primary-500);
}

/* ============================================
   Sequence Editor
   ============================================ */

.sequence-list
{
    display: grid;
    gap: var(--space-sm);
}

.sequence-item
{
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    cursor: move;
    transition: all var(--transition-normal);
}

.sequence-item:hover
{
    border-color: var(--primary-500);
    box-shadow: var(--shadow-md);
}

.sequence-item.dragging
{
    opacity: 0.5;
    transform: scale(0.98);
}

.sequence-number
{
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    border-radius: 50%;
    font-weight: 600;
    color: white;
    font-size: 0.875rem;
}

.sequence-info
{
    flex: 1;
}

.sequence-title
{
    font-weight: 600;
    color: var(--text-primary);
}

.sequence-role
{
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   Modal
   ============================================ */

.modal
{
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active
{
    display: flex;
    animation: fadeIn var(--transition-normal);
}

.modal-content
{
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp var(--transition-normal);
}

@keyframes slideUp
{
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.modal-header h3
{
    font-size: 1.5rem;
    color: var(--text-primary);
}

.modal-close
{
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover
{
    color: var(--text-primary);
}

.modal-body
{
    padding: var(--space-xl);
}

/* ============================================
   Validation Panel
   ============================================ */

.validation-panel
{
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-xl);
}

.validation-panel h3
{
    margin-bottom: var(--space-lg);
    font-size: 1.5rem;
}

.validation-item
{
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
}

.validation-icon
{
    font-size: 1.5rem;
}

.validation-item.valid .validation-icon
{
    color: var(--success);
}

.validation-item.invalid .validation-icon
{
    color: var(--error);
}

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

/* ============================================
   Utilities
   ============================================ */

.empty-state
{
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-tertiary);
}

.empty-state-icon
{
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

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

@media (max-width: 768px)
{
    .container
    {
        padding: var(--space-md);
    }
    
    .logo h1
    {
        font-size: 2rem;
    }
    
    .tab-nav
    {
        flex-direction: column;
    }
    
    .form-row
    {
        grid-template-columns: 1fr;
    }
    
    .modal-content
    {
        width: 95%;
    }
}

/* ============================================
   Scene Configuration Forms
   ============================================ */

.scene-config-container
{
    margin-top: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

/* Credits Scene */

.credits-list
{
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.credit-entry
{
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
    animation: fadeIn var(--transition-fast);
}

/* MCQ Scene */

.mcq-question-container
{
    display: flex;
    gap: var(--space-sm);
}

.mcq-q-type
{
    width: 80px !important;
    flex-shrink: 0;
    padding: 0.5rem !important;
    font-size: 0.8125rem !important;
}

.mcq-input-wrapper
{
    flex: 1;
}

.feedback-grid
{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
}

.feedback-item
{
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.sub-label
{
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.mcq-answers-list
{
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mcq-answer-row
{
    display: flex;
    gap: var(--space-sm);
    align-items: center;
    padding: var(--space-xs);
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    border: 1px solid transparent;
    transition: all var(--transition-fast);
}

.mcq-answer-row:hover
{
    border-color: var(--border-focus);
}

.mcq-type-select
{
    width: 90px;
}

.mcq-answer-row
{
    display: flex;
    gap: var(--space-sm);
    align-items: center;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    border: 1px solid transparent;
    transition: all var(--transition-fast);
    overflow: hidden;
}

.mcq-answer-row:hover
{
    border-color: var(--border-focus);
}

.mcq-answer-row input[type="radio"]
{
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    cursor: pointer;
}

.mcq-type-select
{
    width: 80px !important;
    flex-shrink: 0;
    padding: 0.5rem !important;
    font-size: 0.8125rem !important;
}

.mcq-answer-row .mcq-input-wrapper
{
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.mcq-answer-row .mcq-input-wrapper input
{
    width: 100% !important;
    padding: 0.5rem !important;
    min-width: 0;
}

/* Hangman Scene */

.hangman-grid
{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.hangman-stage-item
{
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    background: var(--bg-elevated);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
}

.hangman-stage-item input[type='file']
{
    font-size: 0.8125rem;
    padding: var(--space-xs);
}

@media (max-width: 600px)
{
    .feedback-grid,
    .hangman-grid
    {
        grid-template-columns: 1fr;
    }
    
    .mcq-question-container
    {
        flex-direction: column;
    }
}

.form-group
{
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.form-group label
{
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
}

.form-group input[type="checkbox"]
{
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.helper-text
{
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-left: 26px;
    line-height: 1.4;
}

.form-group label:hover
{
    color: var(--primary-color);
}

.form-group input[type="checkbox"]:focus
{
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}