/* ── Composer Page Layout ── */

.composer-layout {
    display: grid;
    grid-template-columns: 240px 1fr 280px;
    grid-template-rows: auto 1fr;
    grid-template-areas:
        "toolbar toolbar toolbar"
        "left    viewport right";
    height: 100vh;
    overflow: hidden;
}

/* ── Toolbar ── */

.composer-toolbar {
    grid-area: toolbar;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    height: 48px;
}

.composer-toolbar .toolbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.composer-toolbar .toolbar-center {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    margin-right: auto;
}

.composer-toolbar .toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.toolbar-group {
    display: flex;
    gap: 2px;
    background: var(--bg-primary);
    border-radius: var(--radius);
    padding: 2px;
}

.toolbar-group .btn-tool {
    padding: 6px 14px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
}

.toolbar-group .btn-tool:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.toolbar-group .btn-tool.active {
    background: var(--accent);
    color: #fff;
}

.toolbar-separator {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 4px;
}

.back-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.back-link:hover {
    color: var(--text-primary);
}

/* ── Left Panel ── */

.composer-left {
    grid-area: left;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    padding: 12px 16px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

.object-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.object-list-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    transition: background 0.1s;
}

.object-list-item:hover {
    background: var(--bg-tertiary);
}

.object-list-item.selected {
    background: var(--accent-dim, rgba(99, 102, 241, 0.15));
    color: var(--text-primary);
}

.object-list-item .object-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.object-list-item .object-delete {
    opacity: 0;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 16px;
    padding: 0 4px;
    line-height: 1;
    transition: opacity 0.1s, color 0.1s;
}

.object-list-item:hover .object-delete {
    opacity: 1;
}

.object-list-item .object-delete:hover {
    color: var(--danger);
}

.panel-actions {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-top: 1px solid var(--border);
}

.panel-actions .btn {
    width: 100%;
    text-align: center;
    font-size: 13px;
}

.empty-hint {
    color: var(--text-muted);
    font-size: 12px;
    text-align: center;
    padding: 24px 16px;
    line-height: 1.6;
}

/* ── Viewport ── */

.composer-viewport {
    grid-area: viewport;
    position: relative;
    overflow: hidden;
    background: #0a0a14;
}

.composer-viewport canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.viewport-hint {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-muted);
    font-size: 11px;
    pointer-events: none;
    opacity: 0.6;
}

/* ── Right Panel ── */

.composer-right {
    grid-area: right;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.properties-content {
    padding: 12px 16px;
}

.prop-section {
    margin-bottom: 16px;
}

.prop-section h4 {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.prop-row {
    display: grid;
    grid-template-columns: 20px 1fr 20px 1fr 20px 1fr;
    gap: 4px;
    align-items: center;
    margin-bottom: 6px;
}

.prop-row label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-align: center;
}

.prop-row input[type="number"] {
    width: 100%;
    padding: 4px 6px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 12px;
    font-family: monospace;
}

.prop-row input[type="number"]:focus {
    outline: none;
    border-color: var(--accent);
}

.properties-content .form-group {
    margin-bottom: 10px;
}

.properties-content .form-group label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.properties-content .form-group input[type="text"] {
    width: 100%;
    padding: 6px 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 13px;
}

/* ── Property Actions ── */

.prop-actions {
    display: flex;
    gap: 8px;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

/* ── Library Browser Modal ── */

.library-assets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
    padding: 8px 0;
    max-height: 400px;
    overflow-y: auto;
}

.library-asset-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    overflow: hidden;
    transition: border-color 0.15s, transform 0.1s;
}

.library-asset-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.library-card-thumb {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    overflow: hidden;
}

.library-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.library-card-thumb .placeholder {
    font-size: 32px;
    color: var(--text-muted);
}

.library-card-name {
    padding: 8px;
    font-size: 11px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ── Generate Part Modal ── */

.generate-part-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.generate-part-form textarea {
    width: 100%;
    min-height: 80px;
    padding: 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 14px;
    resize: vertical;
}

.generate-status {
    text-align: center;
    padding: 20px;
}

.generate-status p {
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 12px;
}

/* ── Export Modal ── */

.export-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ── User Info in Composer Header ── */

.composer-user {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}