:root { --primary: #2563eb; --bg: #f8fafc; --panel-bg: #ffffff; --text: #1e293b; }
body { font-family: 'Segoe UI', system-ui, sans-serif; margin: 0; display: flex; height: 100vh; background: var(--bg); color: var(--text); overflow: hidden; }

/* Sidebar Styles */
#sidebar { width: 380px; background: var(--panel-bg); border-right: 1px solid #e2e8f0; display: flex; flex-direction: column; z-index: 10; box-shadow: 5px 0 15px rgba(0,0,0,0.02); }
.sidebar-header { padding: 20px; border-bottom: 1px solid #f1f5f9; background: #fff; }
.sidebar-content { flex-grow: 1; overflow-y: auto; padding: 20px; }

/* Toolbar Styles */
.toolbar { display: flex; gap: 8px; margin-bottom: 20px; }
.tool-btn { flex: 1; padding: 10px; border: 1px solid #e2e8f0; border-radius: 8px; background: #fff; cursor: pointer; font-size: 0.8em; font-weight: 600; transition: all 0.2s; }
.tool-btn:hover { background: #f8fafc; border-color: var(--primary); }
.tool-btn.active { background: var(--primary); color: white; border-color: var(--primary); }

/* Canvas Styles */
#canvas-area { flex-grow: 1; position: relative; overflow: hidden; display: flex; flex-direction: column; }

/* 2D Container */
#canvas-container { 
    position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    display: flex; align-items: center; justify-content: center; 
    cursor: grab; overflow: hidden;
    background: #e2e8f0;
    background-image: linear-gradient(#d1d5db 1px, transparent 1px), linear-gradient(90deg, #d1d5db 1px, transparent 1px);
    background-size: 20px 20px;
}
#canvas-container:active { cursor: grabbing; }

#svg-wrapper { 
    background: white; box-shadow: 0 20px 50px rgba(0,0,0,0.1); 
    transform-origin: center;
}

/* 3D Container */
#webgl-container {
    position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    display: none;
    background: #1e293b;
}

/* View Toggle */
.view-toggle { position: absolute; top: 20px; right: 20px; display: flex; background: white; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); overflow: hidden; z-index: 20; }
.view-toggle button { padding: 10px 20px; border: none; background: none; cursor: pointer; font-weight: bold; color: #64748b; }
.view-toggle button.active { background: var(--primary); color: white; }

/* Panel Editor */
.visual-panels { display: flex; gap: 4px; background: #f1f5f9; padding: 15px; border-radius: 12px; margin-bottom: 20px; overflow-x: auto; min-height: 100px; align-items: center; }
.v-panel { min-width: 60px; height: 80px; background: white; border: 2px solid #cbd5e1; border-radius: 6px; display: flex; flex-direction: column; align-items: center; justify-content: center; cursor: pointer; position: relative; transition: all 0.2s; font-size: 0.7em; font-weight: bold; }
.v-panel:hover { border-color: var(--primary); transform: translateY(-2px); }
.v-panel.selected { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1); }
.v-panel .flap-indicator { position: absolute; width: 30px; height: 8px; background: #e2e8f0; border-radius: 2px; }
.v-panel .top { top: -12px; }
.v-panel .bottom { bottom: -12px; }
.v-panel.has-top .top { background: #3b82f6; }
.v-panel.has-bottom .bottom { background: #3b82f6; }

/* Inputs */
.control-group { margin-bottom: 16px; }
.control-group label { display: block; font-size: 0.75rem; font-weight: 700; color: #64748b; text-transform: uppercase; margin-bottom: 6px; }
input[type="range"] { width: 100%; margin-bottom: 8px; }
.val-display { float: right; color: var(--primary); }

/* Floating UI */
.floating-controls { position: absolute; bottom: 30px; right: 30px; display: flex; gap: 12px; z-index: 20; }
.fab { background: white; border: none; padding: 12px 24px; border-radius: 50px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); cursor: pointer; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.fab:hover { transform: translateY(-2px); }

/* Animations */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.fade-in { animation: fadeIn 0.3s ease; }