:root {
    --primary-bg: #1a1a2e;
    --secondary-bg: #16213e;
    --panel-bg: #0f3460;
    --text-color: #e94560;
    --input-bg: #1f4068;
    --input-text: #ffffff;
    --border-color: #e94560;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Panel Kontrol Kiri */
.controls-panel {
    width: 380px;
    background-color: var(--secondary-bg);
    padding: 20px;
    overflow-y: auto;
    border-right: 2px solid var(--border-color);
}

h1, h2 {
    margin-top: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.control-group {
    background-color: var(--panel-bg);
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
}

select, input[type="number"], input[type="text"] {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    background-color: var(--input-bg);
    color: var(--input-text);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 10px;
    background-color: var(--text-color);
    color: var(--input-text);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #ff7675;
}

#container-info {
    font-size: 0.9em;
    padding: 10px;
    background-color: var(--input-bg);
    border-radius: 4px;
    margin-bottom: 10px;
}

.hidden { display: none; }

/* Item Material */
.material-item {
    border: 1px dashed var(--border-color);
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
    position: relative;
}
.material-item .dims-box, .material-item .dims-cylinder {
    display: flex;
    gap: 5px;
    align-items: center;
}
.material-item input { width: 60px; }
.material-item .material-id { width: 100%; }
.remove-material-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 25px;
    height: 25px;
    padding: 0;
    line-height: 25px;
    background-color: #555;
}

/* Panel Viewer Kanan */
.viewer-panel {
    flex-grow: 1;
    position: relative;
    display: flex;
    flex-direction: column;
}

#canvas-container {
    width: 100%;
    flex-grow: 1;
    background-color: #000;
}

canvas {
    display: block;
}

.viewer-controls {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 10px;
    display: flex;
    gap: 10px;
}

.viewer-controls button {
    width: auto;
    padding: 8px 15px;
}