:root {
    --font-ui: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-pill: 999px;

    --transition: 0.15s ease;
}

[data-theme="dark"] {
    --bg-root: #0d0e10;
    --bg-surface: #131518;
    --bg-elevated: #1a1d21;
    --bg-hover: #1f2226;
    --bg-active: #25282d;
    --bg-paper: #0d0e10;

    --fg-primary: #e8e8ea;
    --fg-secondary: #a0a3a8;
    --fg-tertiary: #6a6d72;

    --border: #222428;
    --border-strong: #2c2f34;

    --accent: #ff5d3a;
    --accent-hover: #ff7558;
    --accent-soft: rgba(255, 93, 58, 0.14);

    --success: #3eca6b;
    --success-soft: rgba(62, 202, 107, 0.12);
    --success-line: rgba(62, 202, 107, 0.32);

    --warn: #f0a23a;
    --warn-soft: rgba(240, 162, 58, 0.14);

    --error: #ff6651;
    --error-soft: rgba(255, 102, 81, 0.14);
    --error-line: rgba(255, 102, 81, 0.32);

    --diff-add-soft: rgba(62, 202, 107, 0.08);
    --diff-add-bar: #3eca6b;
    --diff-del-soft: rgba(255, 93, 58, 0.08);
    --diff-del-bar: #ff5d3a;
    --diff-add-hl: rgba(62, 202, 107, 0.24);
    --diff-del-hl: rgba(255, 93, 58, 0.24);

    --selection: rgba(255, 93, 58, 0.28);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.55);
    --shadow-cta: 0 0 0 1px rgba(255, 93, 58, 0.6), 0 6px 18px rgba(255, 93, 58, 0.18);

    color-scheme: dark;
}

[data-theme="light"] {
    --bg-root: #fafaf7;
    --bg-surface: #ffffff;
    --bg-elevated: #f5f3ec;
    --bg-hover: #efece4;
    --bg-active: #e8e5db;
    --bg-paper: #fafaf6;

    --fg-primary: #1a1916;
    --fg-secondary: #5b574e;
    --fg-tertiary: #8a857a;

    --border: #e8e6df;
    --border-strong: #d8d5cc;

    --accent: #e36340;
    --accent-hover: #c64a2a;
    --accent-soft: #fbe8df;

    --success: #3d8b56;
    --success-soft: #e3f1e6;
    --success-line: rgba(61, 139, 86, 0.32);

    --warn: #c2701a;
    --warn-soft: #fbecd6;

    --error: #c4351a;
    --error-soft: #fceae3;
    --error-line: rgba(196, 53, 26, 0.32);

    --diff-add-soft: #e9f5ec;
    --diff-add-bar: #3d8b56;
    --diff-del-soft: #fceae3;
    --diff-del-bar: #d4654a;
    --diff-add-hl: rgba(61, 139, 86, 0.22);
    --diff-del-hl: rgba(212, 101, 74, 0.22);

    --selection: rgba(227, 99, 64, 0.18);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 6px 20px rgba(20, 18, 12, 0.08);
    --shadow-lg: 0 24px 60px -10px rgba(20, 18, 12, 0.18);
    --shadow-cta: 0 1px 2px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(227, 99, 64, 0.25);

    color-scheme: light;
}

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

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-ui);
    font-size: 14px;
    line-height: 1.5;
    background: var(--bg-root);
    color: var(--fg-primary);
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--selection);
}

button {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: none;
    border: none;
    cursor: pointer;
}

button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

input,
select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    min-height: 0;
}

.topbar,
.mobile-tabs,
.diagnostics-panel,
.mobile-actions {
    flex-shrink: 0;
}

/* topbar */
.topbar {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 16px;
    padding: 0 18px;
    height: 56px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.brand h1 {
    font-size: 13.5px;
    font-weight: 700;
    letter-spacing: -0.01em;
    white-space: nowrap;
    color: var(--fg-primary);
}

.brand-version {
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 600;
    color: var(--fg-tertiary);
    padding: 2px 7px;
    border-radius: var(--radius-xs);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    margin-left: 2px;
    line-height: 1.4;
}

.logo {
    width: 22px;
    height: 22px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 1px 2px rgba(0, 0, 0, 0.12);
    flex-shrink: 0;
    display: inline-block;
}

.mode-tabs {
    display: inline-flex;
    gap: 2px;
    padding: 3px;
    background: var(--bg-elevated);
    border-radius: 9px;
    border: 1px solid var(--border);
    justify-self: center;
}

.mode-tabs button {
    padding: 5px 14px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--fg-secondary);
    border-radius: 7px;
    transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.mode-tabs button:hover:not(.active) {
    color: var(--fg-primary);
}

.mode-tabs button.active {
    background: var(--bg-surface);
    color: var(--fg-primary);
    box-shadow: var(--shadow-sm);
}

.actions {
    display: flex;
    align-items: center;
    gap: 4px;
    justify-self: end;
}

.actions-divider {
    width: 1px;
    height: 18px;
    background: var(--border);
    margin: 0 4px;
    flex-shrink: 0;
}

.icon-btn {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--fg-secondary);
    border-radius: 7px;
    transition: background var(--transition), color var(--transition);
}

.icon-btn:hover {
    background: var(--bg-hover);
    color: var(--fg-primary);
}

.icon-btn svg {
    flex-shrink: 0;
}

[data-theme="dark"] .theme-icon-light {
    display: none;
}

[data-theme="light"] .theme-icon-dark {
    display: none;
}

/* mobile tabs */
.mobile-tabs {
    display: none;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}

.mobile-tabs button {
    flex: 1;
    padding: 11px 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--fg-secondary);
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    position: relative;
}

.mobile-tabs button.active {
    color: var(--fg-primary);
    border-bottom-color: var(--accent);
}

.mobile-tabs .badge {
    background: var(--error-soft);
    color: var(--error);
    font-size: 10px;
    padding: 1px 6px;
}

/* workspace */
.workspace {
    --split: 50%;
    display: flex;
    flex: 1 1 0;
    background: var(--border);
    overflow: hidden;
    min-height: 0;
}

.panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-surface);
    overflow: hidden;
    min-height: 0;
    flex: 0 0 auto;
}

.panel[data-panel="source"] {
    flex-basis: var(--split);
    min-width: 200px;
}

.panel[data-panel="output"] {
    flex: 1 1 auto;
    min-width: 200px;
    transition: box-shadow 0.25s ease, background 0.25s ease;
    position: relative;
}

.panel[data-panel="output"][data-parity="match"] {
    background: var(--bg-surface);
    box-shadow: inset 0 0 0 1px var(--success-line);
}

.panel[data-panel="output"][data-parity="match"] .panel-head {
    background: var(--success-soft);
    border-bottom-color: var(--success-line);
}

.panel[data-panel="output"][data-parity="error"] {
    box-shadow: inset 0 0 0 1px var(--error-line);
}

.workspace-resizer {
    flex: 0 0 5px;
    background: var(--border);
    cursor: col-resize;
    position: relative;
    transition: background var(--transition);
    z-index: 5;
}

.workspace-resizer::before {
    content: "";
    position: absolute;
    inset: 0 -3px;
}

.workspace-resizer:hover,
.workspace-resizer.dragging {
    background: var(--accent);
}

body.resizing,
body.resizing * {
    cursor: col-resize !important;
    user-select: none !important;
}

.panel-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
    flex-wrap: wrap;
    height: 40px;
    min-height: 40px;
}

.panel-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--fg-primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-right: auto;
}

.editor {
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.diff-labels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--fg-secondary);
    background: var(--bg-paper);
    border-bottom: 1px solid var(--border);
    height: 28px;
}

.diff-labels span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0 16px;
}

.diff-labels span::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--diff-del-bar);
    flex-shrink: 0;
}

.diff-labels span:last-child {
    border-left: 1px solid var(--border);
}

.diff-labels span:last-child::before {
    background: var(--diff-add-bar);
}

/* chips */
.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 9px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--fg-secondary);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    line-height: 1.4;
    white-space: nowrap;
}

.chip b,
.chip strong {
    color: var(--fg-primary);
    font-weight: 600;
}

.chip.muted {
    color: var(--fg-tertiary);
}

.chip.speedup {
    border-radius: var(--radius-pill);
    font-family: var(--font-ui);
    font-size: 11px;
    font-weight: 600;
    padding: 3px 10px;
    gap: 6px;
    border-color: transparent;
    background: var(--bg-elevated);
    color: var(--fg-secondary);
    letter-spacing: 0.01em;
}

.chip.speedup .speedup-label {
    text-transform: lowercase;
}

.chip.speedup b {
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: inherit;
    opacity: 0.85;
}

.chip.speedup[data-state="much-slower"],
.chip.speedup[data-state="slower"] {
    color: var(--error);
    background: var(--error-soft);
}

.chip.speedup[data-state="slower"]::before {
    content: "▼";
    font-size: 9px;
}

.chip.speedup[data-state="much-slower"]::before {
    content: "💀";
    font-size: 11px;
}

.chip.speedup[data-state="barely"] {
    color: var(--fg-secondary);
    background: var(--bg-elevated);
}

.chip.speedup[data-state="faster"] {
    color: var(--success);
    background: var(--success-soft);
    box-shadow: inset 0 0 0 1px var(--success-line);
}

.chip.speedup[data-state="faster"]::before {
    content: "✓";
    font-size: 11px;
}

.chip.speedup[data-state="strong"] {
    color: var(--success);
    background: var(--success-soft);
    box-shadow: inset 0 0 0 1px var(--success-line), 0 0 0 1px var(--success-soft);
}

.chip.speedup[data-state="strong"]::before {
    content: "⚡";
    font-size: 12px;
}

.chip.speedup[data-state="blazing"] {
    color: #fff;
    background: linear-gradient(135deg, var(--success), var(--accent));
    box-shadow: 0 4px 14px -4px var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    animation: speedup-pulse 2s ease-in-out infinite;
}

.chip.speedup[data-state="blazing"]::before {
    content: "🔥";
    font-size: 12px;
}

.chip.speedup[data-state="ludicrous"] {
    color: #fff;
    background: linear-gradient(110deg, #ff0080, var(--accent), #ffd400, var(--success));
    background-size: 300% 100%;
    box-shadow: 0 6px 22px -4px var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    animation: speedup-rainbow 3s linear infinite, speedup-pulse 1.4s ease-in-out infinite;
}

.chip.speedup[data-state="ludicrous"]::before {
    content: "🚀";
    font-size: 13px;
}

@keyframes speedup-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.03); }
}

@keyframes speedup-rainbow {
    0% { background-position: 0% 50%; }
    100% { background-position: 300% 50%; }
}

.spinner {
    display: inline-block;
    width: 10px;
    height: 10px;
    border: 1.5px solid var(--border-strong);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 4px;
    vertical-align: -1px;
}

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

/* diagnostics panel */
.diagnostics-panel {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    max-height: 38vh;
    min-height: 0;
    transition: max-height 0.2s ease;
}

.diagnostics-panel[data-collapsed="true"] {
    max-height: 40px;
}

.diag-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 16px;
    height: 40px;
    flex-shrink: 0;
    background: var(--bg-paper);
    border-bottom: 1px solid var(--border);
}

.diagnostics-panel[data-collapsed="true"] .diag-head {
    border-bottom-color: transparent;
}

.diag-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 4px 4px 0;
    color: var(--fg-primary);
    transition: color var(--transition);
}

.diag-toggle:hover {
    color: var(--accent);
}

.diag-toggle-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.diag-counts {
    display: flex;
    gap: 6px;
}

.diag-divider {
    width: 1px;
    height: 18px;
    background: var(--border);
    margin: 0 2px;
}

.diag-filters {
    display: flex;
    gap: 4px;
    margin-right: auto;
}

.diag-filter {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 9px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    background: transparent;
    color: var(--fg-tertiary);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.diag-filter:hover:not(.active) {
    color: var(--fg-secondary);
    background: var(--bg-hover);
}

.diag-filter.active {
    background: var(--bg-elevated);
    color: var(--fg-primary);
    border-color: var(--border);
}

.diag-filter[data-count]::before,
.diag-filter > span[data-count] {
    color: var(--fg-tertiary);
    font-weight: 500;
}

.diag-filter.active > span[data-count] {
    color: var(--fg-secondary);
}

.diag-copy {
    height: 26px !important;
    padding: 0 10px !important;
    font-size: 11.5px !important;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 9px;
    font-family: var(--font-ui);
    font-size: 11px;
    font-weight: 700;
    border-radius: var(--radius-pill);
    line-height: 1.4;
}

.badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.85;
}

.badge.error {
    color: var(--error);
    background: var(--error-soft);
}

.badge.warn {
    color: var(--warn);
    background: var(--warn-soft);
}

.badge.muted {
    color: var(--success);
    background: var(--success-soft);
}

.caret {
    color: var(--fg-tertiary);
    transition: transform 0.2s ease;
    display: inline-flex;
}

.diagnostics-panel[data-collapsed="true"] .caret {
    transform: rotate(180deg);
}

.diag-body {
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 0;
    background: var(--bg-surface);
}

.diagnostics-panel[data-collapsed="true"] .diag-body {
    display: none;
}

.diag-list {
    padding: 0;
}

.diag-empty {
    padding: 22px;
    color: var(--fg-tertiary);
    font-size: 12px;
    text-align: center;
    font-family: var(--font-mono);
}

.diag-row {
    display: grid;
    grid-template-columns: auto auto 1fr auto auto;
    align-items: flex-start;
    gap: 12px;
    padding: 11px 16px;
    font-size: 12.5px;
    text-align: left;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    color: inherit;
    cursor: pointer;
    transition: background var(--transition);
    width: 100%;
    font-family: inherit;
}

.diag-row:hover {
    background: var(--bg-hover);
}

.diag-source {
    font-family: var(--font-mono);
    font-size: 9.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 3px 7px;
    border-radius: var(--radius-xs);
    min-width: 52px;
    text-align: center;
    margin-top: 2px;
}

.diag-row[data-source="rust"] .diag-source {
    background: var(--accent-soft);
    color: var(--accent);
}

.diag-row[data-source="svelte"] .diag-source {
    background: var(--warn-soft);
    color: var(--warn);
}

.diag-severity {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 7px;
}

.diag-severity[data-sev="error"] {
    background: var(--error);
}

.diag-severity[data-sev="warning"] {
    background: var(--warn);
}

.diag-severity[data-sev="info"] {
    background: var(--fg-tertiary);
}

.diag-body-text {
    min-width: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
    line-height: 1.45;
}

.diag-message {
    color: var(--fg-primary);
    word-break: break-word;
    flex: 1;
    min-width: 0;
    font-size: 13px;
    font-weight: 500;
}

.diag-code {
    font-family: var(--font-mono);
    font-size: 11.5px;
    font-weight: 600;
    color: var(--fg-secondary);
    flex-shrink: 0;
}

.diag-row[data-sev="error"] .diag-code {
    color: var(--error);
}

.diag-row[data-sev="warning"] .diag-code {
    color: var(--warn);
}

.diag-loc {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--fg-tertiary);
    margin-top: 3px;
    flex-shrink: 0;
}

.diag-jump {
    height: 24px;
    padding: 0 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--fg-secondary);
    font-family: var(--font-ui);
    font-size: 11px;
    font-weight: 600;
    margin-top: 1px;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    flex-shrink: 0;
}

.diag-row:hover .diag-jump {
    background: var(--bg-elevated);
    color: var(--fg-primary);
    border-color: var(--border-strong);
}

/* settings drawer */
.drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(3px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 50;
}

[data-theme="light"] .drawer-overlay {
    background: rgba(20, 18, 12, 0.25);
}

.app:has(.settings-drawer[data-open="true"]) .drawer-overlay {
    opacity: 1;
    pointer-events: auto;
}

.settings-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(380px, 92vw);
    background: var(--bg-surface);
    border-left: 1px solid var(--border-strong);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform 0.25s ease;
    display: flex;
    flex-direction: column;
    z-index: 51;
}

.settings-drawer[data-open="true"] {
    transform: translateX(0);
}

.drawer-head {
    display: flex;
    flex-direction: column;
    padding: 16px 20px 14px;
    border-bottom: 1px solid var(--border);
    gap: 4px;
}

.drawer-head-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.drawer-head h2 {
    font-size: 15px;
    font-weight: 700;
    color: var(--fg-primary);
}

.drawer-subtitle {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--fg-tertiary);
}

.preset-bar {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px 20px 14px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-paper);
}

.preset-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--fg-tertiary);
}

.preset-chips {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.preset-chip {
    padding: 6px 11px;
    border-radius: 7px;
    border: 1px solid var(--border);
    background: var(--bg-surface);
    color: var(--fg-primary);
    font-family: var(--font-ui);
    font-weight: 600;
    font-size: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.preset-chip:hover:not([data-active]):not([aria-disabled="true"]) {
    background: var(--bg-hover);
}

.preset-chip[data-active] {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
}

.preset-check {
    display: none;
    flex-shrink: 0;
}

.preset-chip[data-active] .preset-check {
    display: inline-block;
}

.preset-chip[aria-disabled="true"] {
    cursor: default;
    opacity: 0.55;
    pointer-events: none;
}

.preset-chip[aria-disabled="true"][data-active] {
    opacity: 1;
}

.drawer-body {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.drawer-body fieldset {
    border: none;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    padding: 16px 20px 18px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.drawer-body legend {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--fg-primary);
    padding: 0;
    margin-bottom: 6px;
    width: 100%;
}

.legend-count {
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 0;
    text-transform: none;
    color: var(--fg-tertiary);
}

.legend-mod {
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 1px 6px;
    border-radius: 3px;
    margin-left: auto;
}

.toggle,
.select,
.text {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12.5px;
    font-weight: 600;
    font-family: var(--font-mono);
    padding: 8px 0;
    cursor: pointer;
    color: var(--fg-primary);
}

.toggle {
    position: relative;
}

.toggle span {
    flex: 1;
}

.toggle::after {
    content: "ON";
    font-family: var(--font-ui);
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: 0.06em;
    padding: 2px 6px;
    border-radius: 3px;
    background: var(--accent-soft);
    color: var(--accent);
    opacity: 0;
    transition: opacity var(--transition);
    flex-shrink: 0;
}

.toggle:has(input:checked)::after {
    opacity: 1;
}

.toggle input[type="checkbox"] {
    appearance: none;
    width: 32px;
    height: 18px;
    background: var(--bg-active);
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    position: relative;
    cursor: pointer;
    transition: background var(--transition);
    flex-shrink: 0;
}

.toggle input[type="checkbox"]::before {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 12px;
    height: 12px;
    background: #ffffff;
    border-radius: 50%;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition);
}

[data-theme="dark"] .toggle input[type="checkbox"]::before {
    background: var(--fg-secondary);
}

.toggle input[type="checkbox"]:checked {
    background: var(--accent);
}

.toggle input[type="checkbox"]:checked::before {
    transform: translateX(14px);
    background: #ffffff;
}

.select select,
.text input {
    flex: 1;
    height: 32px;
    padding: 0 12px;
    background: var(--bg-paper);
    border: 1px solid var(--border);
    border-radius: 7px;
    transition: border-color var(--transition);
    font-family: var(--font-mono);
    font-size: 12.5px;
}

.select select:focus,
.text input:focus {
    outline: none;
    border-color: var(--accent);
}

.select span,
.text span {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    color: var(--fg-primary);
    min-width: 92px;
}

.segmented {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    font-family: var(--font-mono);
    font-size: 12.5px;
    font-weight: 600;
    color: var(--fg-primary);
}

.segmented-label {
    flex: 1;
}

.segmented-buttons {
    display: inline-flex;
    gap: 2px;
    padding: 3px;
    background: var(--bg-elevated);
    border-radius: 9px;
    border: 1px solid var(--border);
}

.segmented-buttons button {
    padding: 4px 10px;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--fg-secondary);
    border-radius: 6px;
    transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.segmented-buttons button:hover:not([data-active]) {
    color: var(--fg-primary);
}

.segmented-buttons button[data-active] {
    background: var(--bg-surface);
    color: var(--fg-primary);
    box-shadow: var(--shadow-sm);
}

.drawer-foot {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-surface);
}

.drawer-foot-meta {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--fg-tertiary);
}

.btn-primary {
    height: 32px;
    padding: 0 14px;
    background: var(--accent);
    color: white;
    font-weight: 600;
    font-size: 12.5px;
    font-family: var(--font-ui);
    border-radius: 7px;
    transition: background var(--transition);
    box-shadow: var(--shadow-cta);
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-ghost {
    height: 32px;
    padding: 0 12px;
    background: transparent;
    color: var(--fg-secondary);
    font-weight: 600;
    font-size: 12.5px;
    font-family: var(--font-ui);
    border: 1px solid var(--border);
    border-radius: 7px;
    transition: background var(--transition), color var(--transition);
}

.btn-ghost:hover {
    background: var(--bg-hover);
    color: var(--fg-primary);
}

/* mobile bottom action bar */
.mobile-actions {
    display: none;
    gap: 10px;
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--border);
    background: var(--bg-surface);
}

.mobile-action {
    height: 44px;
    border-radius: 10px;
    background: var(--bg-elevated);
    color: var(--fg-secondary);
    border: 1px solid var(--border);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-ui);
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
    width: 44px;
}

.mobile-action-primary {
    flex: 1;
    width: auto;
    background: var(--accent);
    color: #ffffff;
    border-color: transparent;
    box-shadow: var(--shadow-cta);
}

.mobile-action-primary[data-state="error"] {
    background: var(--bg-elevated);
    color: var(--error);
    box-shadow: none;
    border-color: var(--error-line);
}

.mobile-action-primary:active {
    transform: translateY(1px);
}

.mobile-action[data-state="copied"] {
    color: var(--success);
    border-color: var(--success-line);
    background: var(--success-soft);
}

.mobile-action[data-state="error"] {
    color: var(--error);
    border-color: var(--error-line);
    background: var(--error-soft);
}

/* mobile */
@media (max-width: 768px) {
    .topbar {
        padding: 0 12px;
        height: 52px;
        grid-template-columns: auto 1fr auto;
    }

    .brand h1 {
        display: none;
    }

    .brand::after {
        display: none;
    }

    .mode-tabs {
        width: 100%;
    }

    .mode-tabs button {
        flex: 1;
    }

    .mobile-tabs {
        display: flex;
    }

    .workspace {
        flex-direction: column;
    }

    .panel[data-panel="source"],
    .panel[data-panel="output"] {
        flex: 1 1 auto;
        min-width: 0;
    }

    .workspace-resizer {
        display: none;
    }

    .panel {
        display: none;
    }

    .app[data-mobile-tab="source"] [data-panel="source"],
    .app[data-mobile-tab="output"] [data-panel="output"] {
        display: flex;
    }

    .app[data-mobile-tab="diagnostics"] .diagnostics-panel {
        max-height: none;
        flex: 1 1 0;
        min-height: 0;
        overflow: hidden;
    }

    .app[data-mobile-tab="diagnostics"] .diagnostics-panel[data-collapsed="true"] .diag-body {
        display: block;
    }

    .app[data-mobile-tab="diagnostics"] .workspace {
        display: none;
    }

    .diff-labels {
        display: none;
    }

    .diagnostics-panel[data-collapsed="true"] {
        max-height: 0;
        border-top: none;
    }

    .diag-head {
        display: none;
    }

    .app[data-mobile-tab="diagnostics"] .diag-head {
        display: flex;
        flex-wrap: wrap;
        height: auto;
        padding: 10px 12px;
        gap: 6px;
        align-items: center;
    }

    .app[data-mobile-tab="diagnostics"] .diag-toggle,
    .app[data-mobile-tab="diagnostics"] .diag-divider {
        display: none;
    }

    .app[data-mobile-tab="diagnostics"] .diag-counts {
        flex: 0 0 100%;
        order: -1;
        margin-bottom: 4px;
        flex-wrap: wrap;
    }

    .app[data-mobile-tab="source"] .diagnostics-panel,
    .app[data-mobile-tab="output"] .diagnostics-panel {
        display: none !important;
    }

    .app[data-mobile-tab="diagnostics"] .diag-filters {
        flex: 1 1 auto;
        margin-right: 0;
    }

    .app[data-mobile-tab="output"] .mobile-actions,
    .app[data-mobile-tab="diagnostics"] .mobile-actions {
        display: none;
    }

    .diag-row {
        grid-template-columns: auto auto 1fr auto auto;
        grid-template-rows: auto auto;
        column-gap: 8px;
        row-gap: 4px;
        padding: 12px 14px;
        align-items: center;
    }

    .diag-row .diag-source {
        grid-column: 1;
        grid-row: 1;
        margin-top: 0;
    }

    .diag-row .diag-severity {
        grid-column: 2;
        grid-row: 1;
        margin-top: 0;
    }

    .diag-row .diag-loc {
        grid-column: 4;
        grid-row: 1;
        margin-top: 0;
    }

    .diag-row .diag-jump {
        grid-column: 5;
        grid-row: 1;
        margin-top: 0;
    }

    .diag-row .diag-body-text {
        grid-column: 1 / -1;
        grid-row: 2;
        font-size: 13px;
    }

    .diag-row .diag-message {
        white-space: normal;
        word-break: break-word;
    }


    .panel-head {
        padding: 6px 12px;
        height: auto;
        min-height: 38px;
        gap: 6px;
        flex-wrap: wrap;
    }

    .chip {
        font-size: 10.5px;
        padding: 3px 8px;
    }

    .panel-head .panel-title {
        flex: 0 0 100%;
    }

    .settings-drawer {
        width: 100vw;
        top: auto;
        right: 0;
        left: 0;
        bottom: 0;
        max-height: 88vh;
        border-radius: 16px 16px 0 0;
        border-left: none;
        border-top: 1px solid var(--border);
        transform: translateY(100%);
    }

    .settings-drawer[data-open="true"] {
        transform: translateY(0);
    }

    .actions [data-action="benchmark"],
    .actions-divider {
        display: none;
    }

    .mobile-actions {
        display: flex;
    }
}

/* CodeMirror overrides */
.editor {
    position: relative;
}

.cm-editor {
    height: 100%;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--fg-primary);
    background: var(--bg-surface);
}

.cm-editor.cm-focused {
    outline: none;
}

.cm-scroller {
    font-family: inherit;
    line-height: 1.6;
    overflow: auto;
}

.cm-content {
    padding: 12px 0;
    caret-color: var(--accent);
    color: var(--fg-primary);
}

.cm-gutters {
    background: transparent !important;
    border: none !important;
    color: var(--fg-tertiary) !important;
    padding-right: 6px;
}

.cm-gutterElement {
    padding-left: 14px;
    font-variant-numeric: tabular-nums;
    opacity: 0.6;
    color: var(--fg-tertiary) !important;
}

.cm-activeLineGutter {
    background: transparent !important;
    color: var(--fg-secondary) !important;
}

.cm-activeLineGutter,
.cm-activeLine {
    background: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .cm-activeLineGutter,
[data-theme="light"] .cm-activeLine {
    background: rgba(20, 18, 12, 0.025);
}

.cm-cursor {
    border-left-width: 2px;
    border-left-color: var(--accent);
}

.cm-selectionBackground,
.cm-content ::selection {
    background: var(--selection) !important;
}

.cm-focused .cm-selectionBackground {
    background: var(--selection) !important;
}

/* lint markers */
.cm-lintRange {
    background: none !important;
    text-decoration: underline wavy;
    text-decoration-skip-ink: none;
    text-underline-offset: 4px;
    text-decoration-thickness: 1.5px;
}

.cm-lintRange-error {
    text-decoration-color: var(--error);
}

.cm-lintRange-warning {
    text-decoration-color: var(--warn);
}

.cm-lintRange-info {
    text-decoration-color: var(--fg-tertiary);
}

.cm-lintPoint::after {
    border-bottom-color: var(--error);
}

.cm-lint-marker {
    width: 14px;
    height: 14px;
    margin-left: 2px;
}

.cm-lint-marker-error {
    color: var(--error);
}

.cm-lint-marker-warning {
    color: var(--warn);
}

.cm-tooltip {
    background: var(--bg-elevated) !important;
    border: 1px solid var(--border-strong) !important;
    border-radius: var(--radius-sm) !important;
    box-shadow: var(--shadow-md) !important;
    color: var(--fg-primary) !important;
    font-family: var(--font-ui) !important;
    font-size: 12px !important;
    padding: 0 !important;
}

.cm-tooltip-lint {
    padding: 8px 10px !important;
    max-width: 360px;
}

.cm-tooltip .cm-diagnostic,
.cm-diagnostic {
    border-left-width: 3px !important;
    padding: 4px 8px !important;
    background: transparent !important;
    color: var(--fg-primary) !important;
}

.cm-diagnostic-error {
    border-left-color: var(--error) !important;
}

.cm-diagnostic-warning {
    border-left-color: var(--warn) !important;
}

.cm-diagnostic-info {
    border-left-color: var(--fg-tertiary) !important;
}

.cm-diagnosticText {
    color: var(--fg-primary) !important;
}

.cm-diagnosticSource {
    color: var(--fg-tertiary) !important;
}

.cm-panels {
    background: var(--bg-elevated) !important;
    color: var(--fg-primary) !important;
    border-color: var(--border) !important;
}

/* merge view */
.cm-merge-revert {
    display: none;
}

#diff-editor {
    display: flex;
    min-height: 0;
}

#diff-editor > .cm-mergeView {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

.cm-mergeView,
.cm-mergeView > div,
.cm-mergeView .cm-mergeViewEditors {
    height: 100% !important;
}

.cm-mergeView .cm-mergeViewEditors {
    display: flex !important;
    flex-direction: row !important;
}

.cm-mergeView .cm-mergeViewEditor {
    flex: 1 1 0 !important;
    min-width: 0 !important;
    display: flex !important;
    flex-direction: column !important;
}

.cm-mergeView .cm-editor {
    height: 100% !important;
    flex: 1 1 auto !important;
    min-height: 0 !important;
}

.cm-mergeView .cm-scroller {
    overflow: auto;
}

.cm-changedLine {
    background-color: var(--diff-del-soft) !important;
    box-shadow: inset 2px 0 0 var(--diff-del-bar);
}

.cm-mergeView .cm-editor:last-of-type .cm-changedLine {
    background-color: var(--diff-add-soft) !important;
    box-shadow: inset 2px 0 0 var(--diff-add-bar);
}

.cm-changedText {
    background-color: var(--diff-del-hl) !important;
    border-radius: 2px;
}

.cm-mergeView .cm-editor:last-of-type .cm-changedText {
    background-color: var(--diff-add-hl) !important;
}

.cm-deletedChunk {
    background-color: var(--diff-del-soft) !important;
    box-shadow: inset 2px 0 0 var(--diff-del-bar);
}

.cm-deletedChunk .cm-deletedText {
    background-color: var(--diff-del-hl);
    border-radius: 2px;
}

.cm-insertedLine {
    background: var(--diff-add-soft);
    box-shadow: inset 2px 0 0 var(--diff-add-bar);
}

.cm-deletedLine {
    background: var(--diff-del-soft);
    box-shadow: inset 2px 0 0 var(--diff-del-bar);
}

[hidden] {
    display: none !important;
}