:root {
    /* Color Palette */
    --bg-dark: #12141c;
    --bg-panel: rgba(25, 28, 41, 0.7);
    --bg-panel-solid: #191c29;
    --border-color: rgba(255, 255, 255, 0.1);
    
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    
    --accent-primary: #6366f1;
    --accent-hover: #4f46e5;
    --accent-danger: #ef4444;
    --accent-success: #10b981;

    /* Styling vars */
    --border-radius: 12px;
    --border-radius-sm: 6px;
    --transition: 0.2s ease-in-out;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.05) 0%, transparent 40%);
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 1rem;
    gap: 1rem;
}

/* Header */
.app-header {
    background: var(--bg-panel);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    background: linear-gradient(90deg, #fff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stats-container {
    display: flex;
    gap: 1rem;
}

.stat-badge {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.stat-badge span {
    color: var(--accent-primary);
    font-weight: 700;
}

.stat-badge.danger span {
    color: var(--accent-danger);
}

/* Main Workspace */
.workspace {
    display: flex;
    flex: 1;
    gap: 1rem;
    min-height: 0; /* Important for flex-child scrolling */
}

.panel {
    background: var(--bg-panel);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 1.5rem;
    overflow-y: auto;
}

.panel::-webkit-scrollbar { width: 6px; }
.panel::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }

.left-panel { width: 320px; flex-shrink: 0; }
.right-panel { width: 320px; flex-shrink: 0; }

.center-panel {
    flex: 1;
    background: #0a0b10;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

#canvas-container {
    width: 100%;
    height: 100%;
    outline: none;
}

canvas { display: block; } /* Three.js reset */

/* Control Groups */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.control-group h2 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed rgba(99, 102, 241, 0.4);
    border-radius: var(--border-radius);
    padding: 2rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(0,0,0,0.2);
    position: relative;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
}

.drop-text {
    font-size: 0.95rem;
    color: var(--text-main);
    pointer-events: none;
}

#image-preview-canvas {
    max-width: 100%;
    max-height: 150px;
    border-radius: var(--border-radius-sm);
    margin: 0 auto;
}


/* Settings Inputs */
.setting-item {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.setting-item label {
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
}

.setting-item label span {
    color: var(--accent-primary);
    font-weight: 600;
}

/* Toggle checkbox */
.toggle-item { margin-top: 0.2rem; }
.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    font-size: 0.9rem;
}
.toggle-label input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 36px;
    height: 20px;
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}
.toggle-label input[type="checkbox"]::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-muted);
    top: 2px;
    left: 2px;
    transition: var(--transition);
}
.toggle-label input[type="checkbox"]:checked {
    background: var(--accent-primary);
}
.toggle-label input[type="checkbox"]:checked::after {
    left: 18px;
    background: white;
}

.helper-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

select, .code-area {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.6rem;
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

select:focus, .code-area:focus {
    border-color: var(--accent-primary);
}

select option {
    background: var(--bg-panel-solid);
}

/* Range Sliders */
input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}
input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 14px; width: 14px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    margin-top: -5px;
    transition: transform var(--transition);
}
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); }
input[type=range]::-webkit-slider-runnable-track {
    width: 100%; height: 4px;
    cursor: pointer;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
}
input[type=range]:focus { outline: none; }

/* Buttons */
.btn {
    padding: 0.6rem 1rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.primary-btn {
    background: var(--accent-primary);
    color: white;
}
.primary-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.4);
}

.secondary-btn {
    background: rgba(255,255,255,0.05);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}
.secondary-btn:hover:not(:disabled) {
    background: rgba(255,255,255,0.1);
}

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

.button-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

/* Textareas */
.code-area {
    resize: none;
    height: 150px;
    font-family: monospace;
    font-size: 0.8rem;
    word-break: break-all;
}

#export-code { background: rgba(0,0,0,0.5); }

/* Overlays & Toolbars */
.preview-toolbar {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 10;
}

.icon-btn {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    backdrop-filter: blur(5px);
}
.icon-btn:hover { background: rgba(255,255,255,0.1); }
.icon-btn.active { background: var(--accent-primary); border-color: var(--accent-primary); }

.overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 600;
    z-index: 20;
    backdrop-filter: blur(4px);
    transition: opacity var(--transition);
}

.hidden { display: none !important; }

.error-text {
    color: var(--accent-danger);
    font-size: 0.85rem;
    margin-top: -0.5rem;
}