* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    overflow: hidden;
}

.container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Left Sidebar */
.left-sidebar {
    width: 280px;
    background: #f8f9fa;
    border-right: 1px solid #dee2e6;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.left-sidebar h2 {
    margin: 0 0 15px 0;
    font-size: 18px;
    color: #333;
}

.left-sidebar h3 {
    margin: 15px 0 10px 0;
    font-size: 14px;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Right Sidebar */
.right-sidebar {
    width: 320px;
    background: #f8f9fa;
    border-left: 1px solid #dee2e6;
    padding: 15px;
    overflow-y: auto;
}

.right-sidebar h2 {
    margin: 0 0 15px 0;
    font-size: 18px;
    color: #333;
}

/* Viewer */
#viewer {
    flex: 1;
    position: relative;
    background: #e9ecef;
}

.viewer-hud {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-family: monospace;
    pointer-events: none;
}

/* Buttons */
.button {
    width: 100%;
    padding: 10px 15px;
    margin-bottom: 8px;
    background: #2196f3;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
}

.button:hover {
    background: #1976d2;
}

.button.danger {
    background: #dc3545;
}

.button.danger:hover {
    background: #c82333;
}

.button.active {
    background: #0d6efd;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.button i {
    font-size: 14px;
}

.button-group {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.button-group .button {
    flex: 1;
    margin-bottom: 0;
}

.icon-button {
    background: transparent;
    border: none;
    color: #666;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.2s;
}

.icon-button:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #333;
}

.icon-button.delete-circle {
    color: #dc3545;
}

.icon-button.delete-circle:hover {
    background: rgba(220, 53, 69, 0.1);
}

/* Controls */
.controls {
    margin-bottom: 20px;
}

.transform-controls {
    margin-top: auto;
    padding-top: 15px;
    border-top: 1px solid #dee2e6;
}

.transform-controls label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 8px 0;
    font-size: 13px;
    color: #495057;
    cursor: pointer;
}

.transform-controls input[type="checkbox"] {
    cursor: pointer;
}

/* Model List */
.model-list {
    flex: 1;
    overflow-y: auto;
}

.model-item {
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.model-item:hover {
    background: #f1f3f5;
    border-color: #adb5bd;
}

.model-item.active {
    background: #e7f5ff;
    border-color: #2196f3;
    box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.1);
}

.model-info {
    flex: 1;
}

.model-name {
    font-weight: 600;
    color: #333;
    margin-bottom: 4px;
    font-size: 13px;
}

.model-transform {
    font-size: 11px;
    color: #666;
    font-family: monospace;
}

.model-controls {
    display: flex;
    gap: 4px;
}

/* Status Panel */
.status-panel {
    background: #e7f5ff;
    border: 1px solid #91caff;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 15px;
    font-size: 13px;
    color: #0958d9;
    min-height: 40px;
}

/* Info Panel */
.info-panel {
    background: #f6ffed;
    border: 1px solid #b7eb8f;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 15px;
    font-size: 13px;
    color: #389e0d;
}

.info-panel h3 {
    margin: 0 0 8px 0;
    font-size: 14px;
    color: #389e0d;
}

/* Export Section */
.export-section {
    background: #fff;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 15px;
}

.export-section h3 {
    margin: 0 0 12px 0;
    font-size: 14px;
    color: #333;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.export-section label {
    display: block;
    margin-bottom: 10px;
}

.export-section label span {
    display: block;
    font-size: 12px;
    color: #666;
    margin-bottom: 4px;
}

.export-section input[type="text"] {
    width: 100%;
    padding: 8px;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    font-size: 13px;
}

.export-section input[type="text"]:focus {
    outline: none;
    border-color: #2196f3;
}

/* Circles Panel */
.circles-panel h3 {
    margin: 0 0 10px 0;
    font-size: 14px;
    color: #666;
}

.circle-item {
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    padding: 10px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.circle-info {
    flex: 1;
    font-size: 12px;
    line-height: 1.6;
    color: #495057;
}

.circle-info strong {
    color: #333;
    font-size: 13px;
}

/* Home Button */
.home-button {
    position: absolute;
    top: 20px;
    left: 20px;
    padding: 10px 15px;
    background-color: #52c41a;
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: bold;
    font-size: 14px;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    border: 2px solid #73d13d;
    display: flex;
    align-items: center;
    gap: 6px;
}

.home-button:hover {
    background-color: #73d13d;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Empty States */
.model-list:empty::after {
    content: "No models loaded";
    display: block;
    text-align: center;
    padding: 40px 20px;
    color: #adb5bd;
    font-size: 14px;
}

.circles-panel p {
    text-align: center;
    color: #adb5bd;
    padding: 20px;
    font-size: 13px;
}

/* Responsive */
@media (max-width: 1200px) {
    .left-sidebar,
    .right-sidebar {
        width: 240px;
    }
}

@media (max-width: 900px) {
    .container {
        flex-direction: column;
    }

    .left-sidebar,
    .right-sidebar {
        width: 100%;
        max-height: 200px;
    }

    #viewer {
        flex: 1;
        min-height: 400px;
    }
}