:root,
[data-theme="dark"] {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d27;
    --bg-panel: #1e2130;
    --bg-input: #252838;
    --border-color: #2d3148;
    --text-primary: #e4e6f0;
    --text-secondary: #9498b3;
    --text-muted: #6b6f8a;
    --accent: #6c63ff;
    --accent-hover: #5a52d9;
    --accent-glow: rgba(108, 99, 255, 0.15);
    --accent-subtle: rgba(108, 99, 255, 0.08);
    --success: #4ade80;
    --warning: #fbbf24;
    --error: #f87171;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
    --sidebar-width: 300px;
    --navbar-height: 48px;
    --statusbar-height: 28px;
    --radius: 8px;
    --radius-sm: 4px;
    --radius-lg: 12px;
}

[data-theme="light"] {
    --bg-primary: #f5f6f8;
    --bg-secondary: #ffffff;
    --bg-panel: #ffffff;
    --bg-input: #f0f1f4;
    --border-color: #d8dae3;
    --text-primary: #1a1d2b;
    --text-secondary: #5f6478;
    --text-muted: #9498ab;
    --accent: #5b52e0;
    --accent-hover: #4a42c4;
    --accent-glow: rgba(91, 82, 224, 0.12);
    --accent-subtle: rgba(91, 82, 224, 0.05);
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.5;
    transition: background 0.25s ease, color 0.25s ease;
}

.icon {
    width: 18px;
    height: 18px;
    stroke-width: 2;
    vertical-align: middle;
    flex-shrink: 0;
}
.icon-sm { width: 14px; height: 14px; }
.icon-xs { width: 13px; height: 13px; }
.icon-label { margin-right: 4px; opacity: 0.7; }

.navbar {
    height: var(--navbar-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar-brand { display: flex; align-items: center; gap: 10px; }

.logo {
    font-family: 'Georgia', serif;
    font-size: 18px;
    font-weight: bold;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.brand-name { font-weight: 600; font-size: 16px; letter-spacing: -0.3px; }

.navbar-controls { display: flex; align-items: center; gap: 6px; }

.navbar-divider {
    width: 1px;
    height: 20px;
    background: var(--border-color);
    margin: 0 4px;
}

.btn {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
}
.btn:hover { background: var(--border-color); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn:active:not(:disabled) { transform: scale(0.97); }
.btn-icon { padding: 4px 8px; font-size: 16px; min-width: 32px; text-align: center; justify-content: center; }
.btn-sm { padding: 3px 8px; font-size: 12px; }
.btn-xs { padding: 2px 6px; font-size: 13px; min-width: 24px; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; font-weight: 600; }
.btn-danger:hover { background: var(--danger-hover); }

select {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 5px 8px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
}

.app-layout {
    display: flex;
    height: calc(100vh - var(--navbar-height) - var(--statusbar-height));
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: margin-left 0.25s ease, margin-right 0.25s ease;
    flex-shrink: 0;
    overflow: hidden;
}
.sidebar-right { border-right: none; border-left: 1px solid var(--border-color); }
.sidebar.collapsed { margin-left: calc(-1 * var(--sidebar-width)); }
.sidebar-right.collapsed { margin-left: 0; margin-right: calc(-1 * var(--sidebar-width)); }

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}
.sidebar-header h3 { font-size: 14px; font-weight: 600; display: flex; align-items: center; }

.sidebar-content { padding: 16px; overflow-y: auto; flex: 1; }

.sidebar-divider {
    height: 1px;
    background: var(--border-color);
    margin: 16px 0;
}

.sidebar-section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 12px;
}

.api-keys-hint {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.4;
}

.api-keys-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.api-key-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.api-key-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.api-key-input-wrapper {
    display: flex;
    align-items: center;
    gap: 4px;
}

.api-key-input {
    flex: 1;
    min-width: 0;
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 5px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-family: 'JetBrains Mono', monospace;
    transition: border-color 0.15s;
}

.api-key-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.api-key-input::placeholder {
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
}

.api-key-toggle {
    flex-shrink: 0;
    opacity: 0.5;
}

.api-key-toggle:hover {
    opacity: 1;
}

.api-key-status {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.api-key-valid {
    color: var(--success);
}

.api-key-invalid {
    color: var(--error);
}

.api-key-save {
    flex-shrink: 0;
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    font-weight: 500;
}

.api-key-save:hover {
    background: var(--accent-hover);
}

.api-key-clear {
    flex-shrink: 0;
    opacity: 0.5;
    padding: 2px 4px;
}

.api-key-clear:hover {
    opacity: 1;
    color: var(--error);
}

.api-key-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.setting-group { margin-bottom: 16px; }
.setting-group label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.setting-group input[type="range"] { width: 100%; accent-color: var(--accent); }
.setting-group input[type="text"],
.setting-group select { width: 100%; }
.setting-group input[type="text"] {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-family: inherit;
}
.setting-group input[type="file"] {
    font-size: 12px;
    color: var(--text-secondary);
    width: 100%;
}
.setting-group input[type="file"]::file-selector-button {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
    margin-right: 8px;
}

.uploaded-files { margin-top: 8px; }
.uploaded-file {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 8px;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}
.uploaded-file .file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.uploaded-file .file-size { color: var(--text-muted); margin-left: 8px; font-size: 11px; }

.main-content { flex: 1; overflow: hidden; display: flex; flex-direction: column; }

.panel-grid {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 2px;
    overflow: hidden;
}

.panel-row { display: flex; gap: 2px; flex: 1; min-height: 0; }

.panel {
    background: var(--bg-panel);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

[data-theme="light"] .panel {
    border: 1px solid var(--border-color);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.panel-header h3 { font-size: 13px; font-weight: 600; color: var(--text-secondary); display: flex; align-items: center; }
.panel-header-right { display: flex; align-items: center; gap: 6px; }
.panel-actions { display: flex; gap: 4px; align-items: center; }

.panel-body { flex: 1; overflow-y: auto; padding: 12px; min-height: 0; }

textarea {
    width: 100%;
    height: 100%;
    background: transparent;
    color: var(--text-primary);
    border: none;
    resize: none;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.6;
    outline: none;
}
textarea::placeholder { color: var(--text-muted); }

.output-editor {
    min-height: 100%;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.6;
    outline: none;
    white-space: pre-wrap;
    word-wrap: break-word;
}
.output-editor:empty::before {
    content: "Final synthesized output will appear here. You can edit it directly.";
    color: var(--text-muted);
}

.agent-output {
    font-size: 14px;
    line-height: 1.7;
    white-space: pre-wrap;
    word-wrap: break-word;
}
.agent-output:empty::before {
    content: "Waiting for agent output...";
    color: var(--text-muted);
    font-style: italic;
}

.placeholder-text { color: var(--text-muted); font-style: italic; font-size: 13px; }

.panel-status { font-size: 11px; padding: 2px 8px; border-radius: 10px; font-weight: 500; }
.panel-status.running { background: rgba(108, 99, 255, 0.2); color: var(--accent); }
.panel-status.done { background: rgba(74, 222, 128, 0.15); color: var(--success); }
.panel-status.error { background: rgba(248, 113, 113, 0.15); color: var(--error); }

.btn-config { opacity: 0.5; transition: opacity 0.15s; }
.btn-config:hover { opacity: 1; }
.btn-config.has-overrides { opacity: 1; color: var(--accent); border-color: var(--accent); }

.clear-btn-wrapper {
    position: relative;
    display: inline-flex;
}

.clear-confirm-popover {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 12px 14px;
    box-shadow: var(--shadow-lg);
    z-index: 200;
    min-width: 200px;
    animation: popoverIn 0.15s ease;
}
.clear-confirm-popover::before {
    content: '';
    position: absolute;
    top: -6px;
    right: 16px;
    width: 10px;
    height: 10px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    transform: rotate(45deg);
}
.clear-confirm-popover.visible { display: block; }
.clear-confirm-popover p {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 10px;
    font-weight: 500;
}
.popover-actions {
    display: flex;
    gap: 6px;
    justify-content: flex-end;
}

@keyframes popoverIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 1000; display: flex; align-items: center; justify-content: center; }
.modal.hidden { display: none; }
.modal-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); backdrop-filter: blur(2px); }
.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 500px;
    max-width: 95vw;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h3 { font-size: 16px; }
.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
}

.modal-body .setting-group select,
.modal-body .setting-group input[type="text"] { width: 100%; }
.modal-body textarea {
    width: 100%;
    height: auto;
    min-height: 150px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px;
    font-size: 12px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    resize: vertical;
}

.advanced-settings {
    margin-top: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
}
.advanced-settings summary {
    cursor: pointer;
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 4px 0;
}
.advanced-settings .setting-group { margin-top: 12px; }

.status-bar {
    height: var(--statusbar-height);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-size: 12px;
    color: var(--text-muted);
}

.katex-display { margin: 12px 0; overflow-x: auto; }
.katex { font-size: 1.1em; }

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
.streaming-cursor::after {
    content: "\25AE";
    animation: pulse 1s infinite;
    color: var(--accent);
    margin-left: 2px;
}

.modal-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 10px;
    line-height: 1.4;
}

.modal-divider {
    height: 1px;
    background: var(--border-color);
    margin: 16px 0;
}

.example-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.example-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 12px;
    text-align: left;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-input);
    cursor: pointer;
    transition: all 0.15s ease;
}
.example-card:hover {
    background: var(--border-color);
    border-color: var(--accent);
}

.example-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.example-category {
    font-size: 11px;
    color: var(--accent);
    opacity: 0.8;
}

.export-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.export-option-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    text-align: left;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-input);
    cursor: pointer;
    transition: all 0.15s ease;
}
.export-option-btn:hover {
    background: var(--border-color);
    border-color: var(--accent);
}

.export-icon-lucide {
    width: 22px;
    height: 22px;
    min-width: 22px;
    color: var(--text-secondary);
}

.export-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.export-desc {
    font-size: 11px;
    color: var(--text-muted);
    margin-left: auto;
}

.tool-toggles-section {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 12px;
    background: var(--bg-secondary);
}
.tool-toggles-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: block;
}
.tool-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 0;
}
.tool-toggle-row label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    cursor: pointer;
}
.tool-toggle-row input[type="checkbox"] {
    accent-color: var(--accent);
}
.tool-desc {
    font-size: 0.8em;
    color: var(--text-muted);
}

input[type="checkbox"] {
    accent-color: var(--accent);
}

.or-search-row {
    display: flex;
    gap: 6px;
}
.or-search-row input[type="text"] {
    flex: 1;
}

.or-search-results {
    margin-top: 10px;
    max-height: 300px;
    overflow-y: auto;
}

.or-hint {
    font-size: 12px;
    color: var(--text-muted);
    font-style: italic;
}
.or-error {
    color: var(--error);
    font-style: normal;
}

.or-model-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    margin-bottom: 4px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: border-color 0.15s;
}
.or-model-card:hover {
    border-color: var(--accent);
}

.or-model-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
    flex: 1;
}

.or-model-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.or-model-id {
    font-size: 10px;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.or-model-meta {
    font-size: 10px;
    color: var(--text-secondary);
}

.or-use-btn {
    flex-shrink: 0;
    margin-left: 8px;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

@media (max-width: 1024px) {
    .panel-row.row-2 {
        flex-wrap: wrap;
    }
    .panel-row.row-2 .panel {
        min-width: calc(50% - 2px);
    }
    .sidebar { --sidebar-width: 260px; }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0 10px;
        gap: 6px;
    }
    .navbar-controls { gap: 4px; }
    .navbar-divider { display: none; }
    .brand-name { display: none; }

    #model-select {
        max-width: 100px;
        font-size: 11px;
    }

    .app-layout { flex-direction: column; }

    .sidebar {
        --sidebar-width: 100%;
        width: 100%;
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        bottom: var(--statusbar-height);
        z-index: 50;
        border-right: none;
        border-left: none;
    }
    .sidebar.collapsed {
        margin-left: 0;
        display: none;
    }
    .sidebar-right.collapsed {
        margin-right: 0;
        display: none;
    }

    .panel-grid { padding: 4px; gap: 4px; overflow-y: auto; }

    .panel-row {
        flex-direction: column;
        flex: none;
    }
    .panel-row.row-1 { min-height: 300px; }
    .panel-row.row-2 { min-height: auto; }

    .panel {
        flex: none;
        min-height: 200px;
    }

    .panel-header h3 { font-size: 12px; }
    .btn-sm { padding: 3px 6px; font-size: 11px; }

    .example-grid { grid-template-columns: 1fr; }

    .modal-content {
        width: 95vw;
        max-height: 90vh;
        border-radius: var(--radius);
    }
}

@media (max-width: 480px) {
    .navbar { height: 42px; }
    .logo { font-size: 15px; padding: 1px 6px; }
    .btn-icon { min-width: 28px; padding: 3px 6px; }
    .btn-icon .icon { width: 16px; height: 16px; }

    .panel-actions .btn-sm span:not(.icon) {
        display: none;
    }
}