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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: #1a1a1a;
            color: #fff;
            height: 100vh;
            width: 100vw;
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        .container {
            max-width: 1600px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 320px 1fr;
            gap: 20px;
            flex-grow: 1;
            height: 100%;
            padding: 20px;
            box-sizing: border-box;
            transition: grid-template-columns 0.3s ease-in-out;
            position: relative;
        }

        .container.collapsed {
            grid-template-columns: 0 1fr;
        }
        .container.collapsed .controls {
            padding: 0;
            overflow: hidden;
        }

        .controls {
            background: #2a2a2a;
            padding: 20px;
            border-radius: 8px;
            overflow-y: auto;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        #collapseBtn {
            position: absolute;
            top: 40px;
            left: 305px;
            z-index: 10;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: #444;
            color: white;
            border: 1px solid #666;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: left 0.3s ease-in-out;
        }

        .control-group {
            margin-bottom: 25px;
        }

        .control-group h3 {
            font-size: 14px;
            color: #aaa;
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        label {
            display: block;
            font-size: 13px;
            margin-bottom: 8px;
            color: #ccc;
        }

        input[type="number"],
        input[type="file"],
        select {
            width: 100%;
            padding: 10px;
            background: #1a1a1a;
            border: 1px solid #444;
            border-radius: 4px;
            color: #fff;
            font-size: 14px;
            margin-bottom: 12px;
        }

        input[type="number"]:focus,
        select:focus {
            outline: none;
            border-color: #666;
        }

        .layout-buttons {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin-bottom: 12px;
        }

        .layout-btn {
            padding: 12px;
            background: #1a1a1a;
            border: 2px solid #444;
            border-radius: 4px;
            color: #fff;
            cursor: pointer;
            font-size: 13px;
            transition: all 0.2s;
        }

        .layout-btn:hover {
            border-color: #666;
        }

        .layout-btn.active {
            border-color: #4a9eff;
            background: #2a4a6a;
        }

        .btn {
            width: 100%;
            padding: 12px;
            background: #4a9eff;
            border: none;
            border-radius: 4px;
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            margin-bottom: 10px;
        }

        .btn:hover {
            background: #3a8eef;
        }

        .btn.secondary {
            background: #444;
        }

        .btn.secondary:hover {
            background: #555;
        }

        .canvas-wrapper {
            background: #2a2a2a;
            border-radius: 8px;
            display: grid;
            grid-template-columns: 30px 1fr;
            grid-template-rows: 30px 1fr;
        }

        .ruler-corner {
            grid-area: 1 / 1 / 2 / 2;
            border-right: 1px solid #444;
            border-bottom: 1px solid #444;
        }

        .ruler {
            position: relative;
            background: #222;
            overflow: hidden;
        }
        .ruler.top {
            grid-area: 1 / 2 / 2 / 3;
            border-bottom: 1px solid #444;
        }
        .ruler.left {
            grid-area: 2 / 1 / 3 / 2;
            border-right: 1px solid #444;
        }
        .ruler canvas {
            position: absolute;
        }

        .canvas-viewport {
            grid-area: 2 / 2 / 3 / 3;
            position: relative;
            overflow: hidden;
            cursor: grab;
        }

        .canvas {
            background: #3a3a3a;
            position: relative;
            box-shadow: 0 4px 20px rgba(0,0,0,0.3);
            transform-origin: 0 0;
        }

        .canvas.guides {
            background-image: 
                repeating-linear-gradient(0deg, transparent, transparent 49px, #4a4a4a 49px, #4a4a4a 50px),
                repeating-linear-gradient(90deg, transparent, transparent 49px, #4a4a4a 49px, #4a4a4a 50px);
            background-size: 50px 50px;
        }

        .logo-container {
            width: 100%;
            height: 100%;
            display: flex;
            padding: 40px;
        }

        .logo-container.horizontal {
            flex-direction: row;
            align-items: center;
            justify-content: flex-start;
        }

        .logo-container.vertical {
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 40px;
        }

        .logo-container.mixed {
            flex-direction: row;
            align-items: center;
            justify-content: center;
            gap: 40px;
        }
        .logo-container.manual {
            display: block;
            position: relative;
        }
        .logo-container.manual .logo-item {
            position: absolute;
            flex: none;
            width: auto;
        }

        .text-stack {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 20px;
        }
        .logo-item {
            object-fit: contain;
            cursor: pointer;
            max-width: 100%;
            max-height: 100%;
            width: auto;
            height: auto;
        }

        .logo-item.selected {
            outline: 2px solid #4a9eff;
            outline-offset: 4px;
        }

        .horizontal .logo-item {
            min-width: 0;
            height: 100%;
        }

        .vertical .logo-item {
            width: 60%;
            height: auto;
        }

        .mixed .logo-item.center {
            height: 100%;
        }

        .mixed .text-stack .logo-item {
            width: 100%;
            min-height: 0;
            height: auto;
        }

        .checkbox-group {
            margin-bottom: 15px;
        }

        .checkbox-group label {
            display: flex;
            align-items: center;
            cursor: pointer;
        }

        .checkbox-group input[type="checkbox"] {
            width: auto;
            margin-right: 8px;
            margin-bottom: 0;
        }

        .slider-group {
            display: grid;
            grid-template-columns: 1fr 60px;
            gap: 10px;
            align-items: center;
            margin-bottom: 15px;
        }

        input[type="range"] {
            -webkit-appearance: none;
            appearance: none;
            width: 100%;
            height: 8px;
            background: #1a1a1a;
            border: 1px solid #444;
            border-radius: 4px;
            outline: none;
            margin-bottom: 0;
        }

        input[type="range"]::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 18px;
            height: 18px;
            background: #4a9eff;
            border-radius: 50%;
            cursor: pointer;
        }

        input[type="range"]::-moz-range-thumb {
            width: 18px;
            height: 18px;
            background: #4a9eff;
            border-radius: 50%;
            cursor: pointer;
        }

        .size-inputs {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }

        .feet-inches {
            margin-bottom: 15px;
        }

        .file-upload-group {
            margin-bottom: 15px;
        }

        .regional-logo-options {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 10px;
            margin-bottom: 15px;
        }

        .regional-logo-btn {
            padding: 10px;
            background: #1a1a1a;
            border: 1px solid #444;
            border-radius: 4px;
            color: #fff;
            cursor: pointer;
            font-size: 13px;
            transition: all 0.2s;
        }

        .regional-logo-btn:hover {
            border-color: #666;
        }

        .regional-logo-btn.active {
            border-color: #4a9eff;
            background: #2a4a6a;
        }

        .file-upload-group label {
            margin-bottom: 5px;
        }

        .canvas-info {
            position: absolute;
            top: 10px;
            right: 10px;
            background: rgba(0,0,0,0.7);
            padding: 8px 12px;
            border-radius: 4px;
            font-size: 12px;
            color: #aaa;
        }

        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
            }
            
            .controls {
                position: relative;
                top: 0;
            }
        }
    
.collapsible-header {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.collapsible-header::after {
    content: '▲';
    font-size: 12px;
    transition: transform 0.2s ease;
}

.collapsed-section .collapsible-header::after {
    content: '▼';
}

.collapsed-section .collapsible-content {
    display: none;
}

.action-buttons {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid #444;
}

.snap-line {
    position: absolute;
    background-color: #ff00e0;
    z-index: 100;
}

.snap-line.vertical {
    width: 1px;
    height: 100%;
    top: 0;
}

.snap-line.horizontal {
    height: 1px;
    width: 100%;
    left: 0;
}