/* ===========================================
   NipNook Virtual Worlds - Application Styles
   =========================================== */

:root {
    /* Colors */
    --bg-dark: #0f0f1a;
    --bg-card: #1a1a2e;
    --bg-elevated: #252542;
    --accent-primary: #7c3aed;
    --accent-secondary: #a855f7;
    --accent-glow: rgba(124, 58, 237, 0.3);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Pages */
.page {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.page.hidden {
    display: none;
}

/* =====================
   Welcome Page
   ===================== */
.welcome-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    background: linear-gradient(180deg, var(--bg-elevated) 0%, transparent 100%);
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo .tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.auth-section {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.user-info.hidden {
    display: none;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--accent-primary);
}

.welcome-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
}

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

.hero h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--text-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.rooms-section h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
}

/* Rooms Grid */
.rooms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.room-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.room-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.room-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.room-card:hover::before {
    opacity: 1;
}

.room-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
}

.room-card .room-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.room-card .asset-count {
    color: var(--accent-secondary);
}

/* Loading State */
.loading {
    text-align: center;
    color: var(--text-muted);
    padding: var(--space-xl);
}

/* =====================
   Room View
   ===================== */
.room-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(180deg, rgba(15, 15, 26, 0.9) 0%, transparent 100%);
    z-index: 100;
}

.room-header h2 {
    flex: 1;
    font-size: 1.25rem;
}

.back-btn {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

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

.room-controls {
    display: flex;
    gap: var(--space-sm);
}

.room-controls.hidden {
    display: none;
}

#renderCanvas {
    width: 100%;
    height: 100%;
    display: block;
    touch-action: none;
    outline: none;
}

/* Asset Palette */
.asset-palette {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: var(--space-md);
    max-width: 90%;
    width: 600px;
    z-index: 100;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.asset-palette.hidden {
    display: none;
}

.palette-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-color);
}

.palette-header h4 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

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

.asset-list {
    display: flex;
    gap: var(--space-sm);
    overflow-x: auto;
    padding: var(--space-xs);
}

.asset-item {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.asset-item:hover {
    border-color: var(--accent-primary);
}

.asset-item.selected {
    border-color: var(--accent-secondary);
    background: var(--accent-glow);
}

.asset-item .asset-icon {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.asset-item .asset-name {
    font-size: 0.625rem;
    color: var(--text-muted);
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    width: 100%;
    padding: 0 var(--space-xs);
}

/* Category Items */
.asset-item.category-item {
    background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
    position: relative;
}

.asset-item .asset-count {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--accent-primary);
    color: white;
    font-size: 0.625rem;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

.palette-header .back-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.875rem;
}

.palette-header .back-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.no-assets {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
    padding: var(--space-lg);
    width: 100%;
}

/* Platform Extension Hints */
.extend-hints {
    pointer-events: none;
    position: absolute;
    inset: 0;
    z-index: 50;
}

.extend-btn {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-primary);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    pointer-events: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.8;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.extend-btn:hover {
    opacity: 1;
    transform: scale(1.1);
}

/* =====================
   Buttons
   ===================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.btn-primary:hover {
    box-shadow: 0 4px 16px var(--accent-glow);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.hidden {
    display: none !important;
}

/* =====================
   Modals
   ===================== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-color);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.modal-content h3 {
    margin-bottom: var(--space-lg);
    font-size: 1.25rem;
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-group input[type="text"] {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

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

.modal-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
    margin-top: var(--space-xl);
}

/* =====================
   Responsive
   ===================== */
@media (max-width: 768px) {
    .welcome-header {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .hero h2 {
        font-size: 1.75rem;
    }
    
    .rooms-grid {
        grid-template-columns: 1fr;
    }
    
    .asset-palette {
        bottom: 0;
        left: 0;
        right: 0;
        transform: none;
        width: 100%;
        max-width: 100%;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }
}