/* ===================================================================
   ADG 3D Engine — Sidebar & Inspector
   Apple-style frosted panels with refined controls
   =================================================================== */

/* ── Base Panel ── */
.app-sidebar,
.app-inspector {
    background: var(--glass-bg-thick);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-color: var(--separator-light);
}

/* ── Headers ── */
.sidebar-header,
.inspector-header {
    padding: 14px 16px;
    border-bottom: 1px solid var(--separator-light);
    background: rgba(0, 0, 0, 0.15);
}

.sidebar-header h3,
.inspector-header h3 {
    margin: 0 0 10px 0;
    font: var(--text-overline);
    text-transform: uppercase;
    color: var(--text-tertiary);
    letter-spacing: 0.8px;
}

/* ── Search Input ── */
.search-input {
    width: 100%;
    background: var(--fill-quaternary);
    border: 1px solid var(--separator-light);
    border-radius: var(--radius-sm);
    padding: 7px 10px 7px 28px;
    color: var(--text-primary);
    font: 400 13px/1 var(--font-sans);
    outline: none;
    transition: all var(--duration-fast) var(--ease-default);
}

.search-input:focus {
    border-color: var(--accent);
    background: rgba(10, 132, 255, 0.06);
    box-shadow: var(--accent-glow);
}

.search-input::placeholder {
    color: var(--text-tertiary);
}

/* ── Category Tabs ── */
.category-tabs {
    display: flex;
    padding: 6px 16px;
    gap: 2px;
    border-bottom: 1px solid var(--separator-light);
    overflow-x: auto;
    background: var(--fill-quaternary);
    margin: 0 12px;
    border-radius: var(--radius-sm);
}

.tab {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font: 500 11px/1 var(--font-sans);
    padding: 5px 10px;
    cursor: pointer;
    border-radius: calc(var(--radius-sm) - 2px);
    border-bottom: none;
    transition: all var(--duration-fast) var(--ease-default);
    white-space: nowrap;
}

.tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.tab.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
    border-bottom: none;
}

/* ── Asset Grid ── */
.asset-grid {
    padding: 12px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    overflow-y: auto;
}

.asset-item {
    background: var(--fill-quaternary);
    border: 1px solid var(--separator-light);
    border-radius: var(--radius-md);
    padding: 8px;
    cursor: grab;
    transition: all var(--duration-fast) var(--ease-default);
    text-align: center;
}

.asset-item:hover {
    border-color: var(--separator);
    background: var(--fill-tertiary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.asset-item:active {
    transform: scale(0.97);
}

.thumb-placeholder {
    width: 100%;
    aspect-ratio: 1;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-quaternary);
    font-size: 24px;
}

.asset-item .name {
    font: var(--text-caption);
    color: var(--text-secondary);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===================================================================
   Mobile & iPad Responsive (max-width: 1024px)
   =================================================================== */
@media screen and (max-width: 1024px) {

    .app-sidebar,
    .app-inspector {
        width: 100% !important;
        max-width: 100% !important;
        border-right: none;
        border-left: none;
    }

    .asset-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        padding: 8px;
    }

    .category-tabs {
        margin: 0 8px;
        padding: 6px 8px;
    }
}