:root {
    --bg: #f5f5f5;
    --bg2: #ffffff;
    --bg3: #e8e8e8;
    --text: #1a1a1a;
    --text2: #666;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --border: #d1d5db;
    --error: #dc2626;
    --success: #16a34a;
    --warning: #ca8a04;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1a1a1a;
        --bg2: #252525;
        --bg3: #333;
        --text: #e5e5e5;
        --text2: #999;
        --accent: #3b82f6;
        --accent-hover: #60a5fa;
        --border: #444;
        --error: #ef4444;
        --success: #22c55e;
        --warning: #eab308;
        --shadow: 0 1px 3px rgba(0,0,0,0.3);
    }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.hidden { display: none !important; }

/* ─── Header ─────────────────────────────────────────────── */

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 18px;
    font-weight: 600;
}

.header-controls {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* ─── Buttons & Inputs ───────────────────────────────────── */

button {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg2);
    color: var(--text);
    cursor: pointer;
    font-size: 13px;
}

button:hover { background: var(--bg3); }

button#btn-send, button#btn-ingest, button#btn-save-config, button#modal-confirm {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

button#btn-send:hover, button#btn-ingest:hover, button#btn-save-config:hover, button#modal-confirm:hover {
    background: var(--accent-hover);
}

select, input[type="text"], input[type="password"] {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg2);
    color: var(--text);
    font-size: 13px;
}

textarea {
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg2);
    color: var(--text);
    font-size: 14px;
    resize: vertical;
    font-family: inherit;
}

/* ─── Support View ───────────────────────────────────────── */

#support-main {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 56px);
}

#chat-messages {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-msg {
    max-width: 90%;
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 14px;
    line-height: 1.7;
}

.chat-msg.user {
    align-self: flex-end;
    background: var(--accent);
    color: #fff;
    border-bottom-right-radius: 2px;
    white-space: pre-wrap;
}

.chat-msg.assistant {
    align-self: flex-start;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-bottom-left-radius: 2px;
    white-space: pre-wrap;
}

.chat-msg.status {
    align-self: center;
    background: var(--bg3);
    color: var(--text2);
    font-size: 12px;
    padding: 4px 12px;
}

.chat-sources {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

.chat-sources h4 {
    font-size: 12px;
    color: var(--text2);
    margin-bottom: 6px;
}

.source-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
    margin-bottom: 8px;
    cursor: pointer;
}

.source-card .source-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.source-card .source-name {
    font-weight: 500;
    font-size: 13px;
}

.source-card .source-section {
    font-size: 12px;
    color: var(--text2);
}

.source-card .source-score {
    font-size: 11px;
    color: var(--text2);
}

.source-card .source-body {
    display: none;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text2);
    white-space: pre-wrap;
    max-height: 200px;
    overflow-y: auto;
}

.source-card.expanded .source-body {
    display: block;
}

#input-area {
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

#question-input { flex: 1; }

#btn-new-chat {
    background: var(--bg2);
    color: var(--text2);
    font-size: 18px;
    font-weight: 700;
    width: 36px;
    padding: 6px;
    border: 1px solid var(--border);
}

#btn-new-chat:hover { background: var(--bg3); }

/* ─── Admin Tabs ─────────────────────────────────────────── */

#admin-tabs {
    display: flex;
    gap: 0;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 0 20px;
}

#admin-tabs .tab {
    padding: 10px 16px;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    font-size: 13px;
    color: var(--text2);
}

#admin-tabs .tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

#admin-tabs .tab:hover {
    color: var(--text);
    background: transparent;
}

.tab-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* ─── Dashboard ──────────────────────────────────────────── */

#dash-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px;
    text-align: center;
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
}

.stat-card .stat-label {
    font-size: 12px;
    color: var(--text2);
    margin-top: 2px;
}

#dash-chart {
    margin-bottom: 20px;
}

.chart-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
    font-size: 13px;
}

.chart-bar .bar-label {
    width: 90px;
    text-align: right;
    color: var(--text2);
}

.chart-bar .bar-fill {
    height: 20px;
    background: var(--accent);
    border-radius: 3px;
    min-width: 2px;
}

.chart-bar .bar-count {
    color: var(--text2);
    font-size: 12px;
}

#btn-ingest { margin-bottom: 12px; }

#ingest-progress {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    max-height: 300px;
    overflow-y: auto;
    font-size: 12px;
    font-family: monospace;
}

.ingest-line { padding: 2px 0; }
.ingest-line.success { color: var(--success); }
.ingest-line.skipped { color: var(--text2); }
.ingest-line.failed { color: var(--error); }

/* ─── Documents ──────────────────────────────────────────── */

#doc-filters {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.doc-item {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    margin-bottom: 8px;
}

.doc-item .doc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.doc-item .doc-name {
    font-weight: 500;
    font-size: 14px;
}

.doc-item .doc-meta {
    font-size: 12px;
    color: var(--text2);
    margin-top: 2px;
}

.doc-item .doc-actions {
    display: flex;
    gap: 6px;
}

.doc-item .doc-actions button {
    font-size: 11px;
    padding: 3px 8px;
}

.doc-item.failed { border-left: 3px solid var(--error); }
.doc-type-select {
    font-size: 12px;
    padding: 1px 4px;
    border-radius: 3px;
}

.doc-item .doc-error {
    color: var(--error);
    font-size: 12px;
    margin-top: 4px;
}

.chunks-panel {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
    max-height: 400px;
    overflow-y: auto;
}

.chunk-item {
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
    font-size: 12px;
    cursor: pointer;
}

.chunk-item:last-child { border-bottom: none; }

.chunk-item .chunk-title {
    font-weight: 500;
    color: var(--text);
}

.chunk-item .chunk-preview {
    color: var(--text2);
    margin-top: 2px;
}

.chunk-item .chunk-body {
    display: none;
    margin-top: 6px;
    white-space: pre-wrap;
    color: var(--text2);
    max-height: 200px;
    overflow-y: auto;
}

.chunk-item.expanded .chunk-body {
    display: block;
}

.chunk-item.expanded .chunk-preview {
    display: none;
}

/* ─── Settings ───────────────────────────────────────────── */

.settings-section {
    margin-bottom: 24px;
}

.settings-section h3 {
    font-size: 14px;
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}

.settings-section label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 4px;
    margin-top: 10px;
}

.settings-section input[type="text"],
.settings-section select {
    width: 100%;
    padding: 8px 10px;
}

.key-row {
    display: flex;
    gap: 8px;
}

.key-row input { flex: 1; }

.hint {
    font-size: 11px;
    color: var(--text2);
    margin-top: 3px;
}

.type-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    margin: 3px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 12px;
}

.type-tag button {
    background: none;
    border: none;
    color: var(--text2);
    cursor: pointer;
    font-size: 14px;
    padding: 0 2px;
    line-height: 1;
}

.type-tag button:hover { color: var(--error); }

.add-type-row {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}

.add-type-row input { flex: 1; }

.doc-types-btn {
    font-size: 11px;
    padding: 2px 6px;
    cursor: pointer;
}

.type-checkbox-list {
    position: absolute;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 50;
    max-height: 200px;
    overflow-y: auto;
}

.type-checkbox-list label {
    display: block;
    font-size: 12px;
    padding: 2px 0;
    cursor: pointer;
}

.type-checkbox-list label input {
    margin-right: 6px;
}

.type-checkbox-list .type-cb-actions {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--border);
    text-align: right;
}

.toggle-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.toggle-row input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.error { color: var(--error); font-size: 12px; }

#config-status {
    margin-top: 10px;
    font-size: 13px;
}

/* ─── Modal ──────────────────────────────────────────────── */

#modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    min-width: 340px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.modal h3 { margin-bottom: 12px; font-size: 16px; }

.modal input {
    width: 100%;
    padding: 8px 10px;
    margin-bottom: 12px;
}

.modal-buttons {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}