:root {
    --bg-app: #0a0a0c; --bg-panel: #121214; --bg-input: #202024;
    --text-main: #e1e1e6; --text-muted: #8d8d99;
    --accent: #6366f1; --accent-hover: #4f46e5;
    --border: #29292e; --danger: #ef4444; --danger-hover: #dc2626;
    --success: #10b981; --warning: #f59e0b;
}

body {
    margin: 0; padding: 0; background-color: var(--bg-app); color: var(--text-main);
    font-family: 'Segoe UI', system-ui, sans-serif; display: flex; height: 100vh; overflow: hidden;
}

#backToLab {
    position: fixed; top: 25px; right: 30px;
    color: var(--text-muted); font-size: 11px; text-transform: uppercase;
    letter-spacing: 1.5px; text-decoration: none; font-weight: 600;
    z-index: 1000; background: rgba(18, 18, 20, 0.7);
    padding: 8px 16px; border-radius: 6px; border: 1px solid var(--border);
    backdrop-filter: blur(4px); transition: all 0.2s; display: flex; align-items: center; gap: 8px;
}
#backToLab:hover { color: var(--accent); border-color: var(--accent); background: rgba(18, 18, 20, 0.9); }

.sidebar { width: 320px; min-width: 320px; background-color: var(--bg-panel); border-right: 1px solid var(--border); display: flex; flex-direction: column; overflow-y: auto; z-index: 10; }
.sidebar-header { padding: 20px; border-bottom: 1px solid var(--border); }
.sidebar-header h1 { margin: 0; font-size: 18px; font-weight: 600; color: #fff;}
.sidebar-header p { margin: 5px 0 0 0; font-size: 12px; color: var(--text-muted); }
.panel-section { padding: 20px; border-bottom: 1px solid var(--border); }
.section-title { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 15px; font-weight: 700; }
.control-group { margin-bottom: 15px; display: flex; flex-direction: column; gap: 6px; }
.control-row { display: flex; justify-content: space-between; align-items: center; }

label { font-size: 12px; font-weight: 500; }
.val-display { font-size: 11px; color: var(--text-muted); background: var(--bg-app); padding: 2px 6px; border-radius: 4px; border: 1px solid var(--border); }
input[type="range"] { width: 100%; accent-color: var(--accent); cursor: pointer; }
input[type="file"] { background: var(--bg-input); color: var(--text-main); border: 1px solid var(--border); padding: 8px; border-radius: 4px; font-size: 12px; width: 100%; box-sizing: border-box; cursor: pointer; }

button { background-color: var(--bg-input); color: var(--text-main); border: 1px solid var(--border); padding: 10px; font-size: 12px; font-weight: 600; border-radius: 6px; cursor: pointer; transition: all 0.2s; display: flex; justify-content: center; width: 100%; }
button:hover { background-color: #3f3f46; }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.primary { background-color: var(--accent); border-color: var(--accent); color: #fff;}
button.primary:hover:not(:disabled) { background-color: var(--accent-hover); }
button.warning { background-color: var(--warning); border-color: var(--warning); color: #fff;}
button.danger { color: #fff; background-color: var(--border); border-color: var(--danger); }
button.danger:hover:not(:disabled) { background-color: var(--danger-hover); }

.workspace { flex: 1; display: flex; justify-content: center; align-items: center; padding: 40px; background-image: radial-gradient(var(--border) 1px, transparent 1px); background-size: 20px 20px; overflow: auto; position: relative; }
.canvas-container { position: relative; background: #ffffff; border-radius: 4px; box-shadow: 0 15px 35px rgba(0,0,0,0.5); flex-shrink: 0; }
.canvas-container canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
#bgCanvas { z-index: 1; }
#paintCanvas { z-index: 2; pointer-events: none; }
#svg-parser-container { position: absolute; top: -9999px; left: -9999px; width: 10px; height: 10px; overflow: hidden; opacity: 0; pointer-events: none; }

.zoom-controls { position: fixed; bottom: 30px; right: 30px; display: flex; gap: 5px; background: rgba(18, 18, 20, 0.8); padding: 8px; border-radius: 8px; border: 1px solid var(--border); backdrop-filter: blur(4px); z-index: 50; }
.zoom-controls button { width: 32px; height: 32px; padding: 0; margin: 0; font-size: 14px; border-radius: 4px; background: var(--bg-input); }

.loader-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(10, 10, 12, 0.85); backdrop-filter: blur(4px); display: flex; flex-direction: column; justify-content: center; align-items: center; z-index: 100; opacity: 0; pointer-events: none; transition: opacity 0.3s; }
.loader-overlay.active { opacity: 1; pointer-events: all; }
.zenart-loader { width: 80px; height: 80px; }
.zenart-loader path { fill: none; stroke: var(--accent); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 80 170; animation: snakeLine 1.2s linear infinite; }
.loader-text { margin-top: 20px; font-size: 14px; font-weight: 600; color: var(--accent); letter-spacing: 2px; text-transform: uppercase; }
@keyframes snakeLine { from { stroke-dashoffset: 250; } to { stroke-dashoffset: 0; } }