/* Semantic Memory Browser */

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    --border: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --gold: #f0c040;
    --green: #3fb950;
    --orange: #d29922;
    --red: #f85149;
    --radius: 6px;
    --radius-lg: 10px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; background: var(--bg-primary); color: var(--text-primary); font-family: var(--font); font-size: 14px; }

/* Layout: 3-column */
.sm-layout {
    display: grid;
    grid-template-columns: 220px 340px 1fr;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sm-sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 20px 16px;
    overflow-y: auto;
}

.sm-back {
    display: inline-block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 12px;
    margin-bottom: 12px;
    transition: color 0.2s;
}
.sm-back:hover { color: var(--accent); }

.sm-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
}

/* Stats */
.sm-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 20px;
}

.sm-stat {
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    padding: 10px;
    text-align: center;
}

.sm-stat-label {
    display: block;
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sm-stat-value {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 2px;
}

/* Sections */
.sm-section {
    margin-bottom: 16px;
}

.sm-label {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.sm-select {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: var(--radius);
    padding: 6px 8px;
    font-size: 13px;
    font-family: var(--font);
}

/* Layer buttons */
.sm-layer-btns {
    display: flex;
    gap: 4px;
}

.sm-layer-btn {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: var(--radius);
    padding: 6px 0;
    font-size: 12px;
    font-weight: 600;
    font-family: var(--mono);
    cursor: pointer;
    transition: all 0.15s;
}

.sm-layer-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.sm-layer-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.sm-layer-hint {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
    text-align: center;
}

/* List panel */
.sm-list-panel {
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sm-search-bar {
    display: flex;
    gap: 6px;
    padding: 12px;
    border-bottom: 1px solid var(--border);
}

.sm-search {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: var(--radius);
    padding: 7px 10px;
    font-size: 13px;
    font-family: var(--font);
    outline: none;
}
.sm-search:focus { border-color: var(--accent); }

.sm-search-btn {
    background: var(--accent);
    border: none;
    color: #fff;
    border-radius: var(--radius);
    padding: 7px 14px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
}
.sm-search-btn:hover { background: var(--accent-hover); }

/* Tabs */
.sm-tab-bar {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.sm-tab {
    flex: 1;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    padding: 8px 0;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
    transition: all 0.15s;
}

.sm-tab:hover { color: var(--text-primary); }
.sm-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Item list */
.sm-item-list {
    flex: 1;
    overflow-y: auto;
}

.sm-item {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.15s;
}

.sm-item:hover { background: var(--bg-hover); }
.sm-item.active { background: var(--bg-tertiary); border-left: 3px solid var(--accent); }

.sm-item-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sm-item-meta {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}

.sm-item-snippet {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sm-item-score {
    display: inline-block;
    background: var(--bg-tertiary);
    border-radius: 3px;
    padding: 1px 5px;
    font-size: 10px;
    font-family: var(--mono);
    color: var(--gold);
    margin-left: 6px;
}

.sm-empty {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

/* Detail panel */
.sm-detail-panel {
    overflow-y: auto;
    padding: 20px 24px;
}

.sm-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    font-size: 14px;
    text-align: center;
    padding: 40px;
}

.sm-detail-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.sm-detail-title {
    font-size: 16px;
    font-weight: 700;
    word-break: break-all;
}

.sm-detail-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Chunks */
.sm-chunk-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sm-chunk {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.sm-chunk-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    font-size: 11px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

.sm-chunk-idx {
    font-weight: 700;
    color: var(--accent);
    font-family: var(--mono);
}

.sm-chunk-lines {
    font-family: var(--mono);
}

.sm-chunk-layers {
    padding: 12px;
}

.sm-chunk-layer {
    margin-bottom: 10px;
}

.sm-chunk-layer:last-child { margin-bottom: 0; }

.sm-chunk-layer-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 3px;
    padding: 2px 6px;
    border-radius: 3px;
    display: inline-block;
}

.sm-chunk-layer-label.l1 { color: var(--green); background: rgba(63, 185, 80, 0.1); }
.sm-chunk-layer-label.l2 { color: var(--orange); background: rgba(210, 153, 34, 0.1); }
.sm-chunk-layer-label.l3 { color: var(--accent); background: rgba(88, 166, 255, 0.1); }

.sm-chunk-layer-text {
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
    font-family: var(--mono);
}

.sm-chunk-layer-empty {
    font-size: 12px;
    color: var(--text-muted);
    font-style: italic;
}

/* Responsive */
@media (max-width: 900px) {
    .sm-layout { grid-template-columns: 1fr; grid-template-rows: auto 1fr; height: auto; }
    .sm-sidebar { border-right: none; border-bottom: 1px solid var(--border); }
    .sm-list-panel { border-right: none; max-height: 40vh; }
    .sm-detail-panel { min-height: 50vh; }
}