:root {
  --bg: #edf3f9;
  --bg-accent: #dbe7f3;
  --panel: rgba(248, 251, 255, 0.9);
  --panel-strong: #f8fbff;
  --text: #24374a;
  --muted: #6c7d8f;
  --line: rgba(103, 128, 156, 0.18);
  --primary: #5c8fc5;
  --primary-strong: #4a7caf;
  --success: #2c8c73;
  --danger: #c05d68;
  --shadow: 0 20px 60px rgba(74, 101, 134, 0.14);
  --bg-radial-primary: rgba(92, 143, 197, 0.2);
  --bg-radial-secondary: rgba(143, 166, 191, 0.16);
  --bg-end: #e5edf6;
  --control-bg: rgba(248, 251, 255, 0.92);
  --control-soft-bg: rgba(248, 251, 255, 0.78);
  --button-text: #f7fbff;
  --editor-bg: #1a2430;
  --editor-text: #e9f0f8;
  --editor-caret: #eef5fc;
  --selection-bg: rgba(143, 179, 221, 0.28);
  --token-key: #8fc0ff;
  --token-string: #b8e3d2;
  --token-number: #c7b7ff;
  --token-boolean: #ffd28f;
  --token-null: #ff9aa5;
  --token-comment: #7f94ab;
  --token-punctuation: #81c7ee;
  --tab-count-bg: rgba(36, 55, 74, 0.08);
  --tab-count-active-bg: rgba(247, 251, 255, 0.22);
  --timeline-selected-border: rgba(92, 143, 197, 0.38);
  --timeline-selected-shadow: rgba(92, 143, 197, 0.14);
  --line-diff-bg: #16202b;
  --line-diff-text: #e6eef7;
  --line-diff-header-bg: rgba(255, 255, 255, 0.07);
  --line-diff-header-text: rgba(230, 238, 247, 0.74);
  --line-diff-border: rgba(255, 255, 255, 0.05);
  --diff-added-bg: rgba(52, 156, 128, 0.18);
  --diff-removed-bg: rgba(192, 93, 104, 0.18);
  --diff-changed-bg: rgba(92, 143, 197, 0.2);
  --diff-context-bg: rgba(255, 255, 255, 0.05);
  --diff-context-text: rgba(230, 238, 247, 0.62);
  --diff-line-no: rgba(230, 238, 247, 0.46);
  --pill-get-bg: rgba(81, 135, 214, 0.14);
  --pill-get-color: #467eca;
  --pill-get-border: rgba(81, 135, 214, 0.24);
  --pill-post-bg: rgba(52, 156, 128, 0.14);
  --pill-post-color: #2d8d73;
  --pill-post-border: rgba(52, 156, 128, 0.24);
  --pill-delete-bg: rgba(192, 93, 104, 0.14);
  --pill-delete-color: #b45963;
  --pill-delete-border: rgba(192, 93, 104, 0.24);
  --pill-patch-bg: rgba(211, 171, 86, 0.16);
  --pill-patch-color: #9b7a24;
  --pill-patch-border: rgba(211, 171, 86, 0.24);
  --pill-neutral-bg: rgba(108, 125, 143, 0.12);
  --pill-neutral-color: #6c7d8f;
  --pill-neutral-border: rgba(108, 125, 143, 0.2);
  --workspace-panel-height: 1320px;
}

body[data-theme="warm"] {
  --bg: #f3efe6;
  --bg-accent: #e1d6c2;
  --panel: rgba(255, 252, 245, 0.9);
  --panel-strong: #fffaf0;
  --text: #1f1a14;
  --muted: #6f6355;
  --line: rgba(79, 62, 45, 0.15);
  --primary: #9f3d22;
  --primary-strong: #7f2c15;
  --success: #1f7a4d;
  --danger: #a02f2f;
  --shadow: 0 20px 60px rgba(75, 51, 28, 0.14);
  --bg-radial-primary: rgba(159, 61, 34, 0.18);
  --bg-radial-secondary: rgba(31, 122, 77, 0.14);
  --bg-end: #efe7d8;
  --control-bg: rgba(255, 255, 255, 0.85);
  --control-soft-bg: rgba(255, 255, 255, 0.7);
  --button-text: #fff7f0;
  --editor-bg: #201a16;
  --editor-text: #f6efe2;
  --editor-caret: #f6efe2;
  --selection-bg: rgba(255, 247, 240, 0.28);
  --token-key: #ffb454;
  --token-string: #c3e88d;
  --token-number: #82aaff;
  --token-boolean: #f78c6c;
  --token-null: #f07178;
  --token-comment: #7f8c98;
  --token-punctuation: #89ddff;
  --tab-count-bg: rgba(31, 26, 20, 0.08);
  --tab-count-active-bg: rgba(255, 247, 240, 0.2);
  --timeline-selected-border: rgba(159, 61, 34, 0.4);
  --timeline-selected-shadow: rgba(159, 61, 34, 0.15);
  --line-diff-bg: #181512;
  --line-diff-text: #f3eadc;
  --line-diff-header-bg: rgba(255, 255, 255, 0.08);
  --line-diff-header-text: rgba(243, 234, 220, 0.72);
  --line-diff-border: rgba(255, 255, 255, 0.04);
  --diff-added-bg: rgba(31, 122, 77, 0.18);
  --diff-removed-bg: rgba(160, 47, 47, 0.18);
  --diff-changed-bg: rgba(159, 61, 34, 0.18);
  --diff-context-bg: rgba(255, 255, 255, 0.05);
  --diff-context-text: rgba(243, 234, 220, 0.62);
  --diff-line-no: rgba(243, 234, 220, 0.48);
  --pill-get-bg: rgba(41, 121, 255, 0.14);
  --pill-get-color: #2f6fed;
  --pill-get-border: rgba(41, 121, 255, 0.24);
  --pill-post-bg: rgba(31, 122, 77, 0.14);
  --pill-post-color: #1f7a4d;
  --pill-post-border: rgba(31, 122, 77, 0.24);
  --pill-delete-bg: rgba(160, 47, 47, 0.14);
  --pill-delete-color: #b23a3a;
  --pill-delete-border: rgba(160, 47, 47, 0.24);
  --pill-patch-bg: rgba(201, 137, 16, 0.14);
  --pill-patch-color: #a56a00;
  --pill-patch-border: rgba(201, 137, 16, 0.24);
  --pill-neutral-bg: rgba(79, 62, 45, 0.1);
  --pill-neutral-color: #6f6355;
  --pill-neutral-border: rgba(79, 62, 45, 0.18);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, var(--bg-radial-primary), transparent 28%),
    radial-gradient(circle at right, var(--bg-radial-secondary), transparent 32%),
    linear-gradient(160deg, var(--bg), #f7faff 62%, var(--bg-end));
}

body.modal-open {
  overflow: hidden;
}

.app-shell {
  width: min(1400px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 40px;
}

.auth-shell {
  width: min(640px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  align-items: center;
  padding: 32px 0;
}

.auth-stage {
  display: grid;
}

.auth-panel {
  position: relative;
  backdrop-filter: blur(14px);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 28px;
  padding: 30px;
  overflow: hidden;
}

.auth-card {
  display: grid;
  align-content: start;
  gap: 18px;
}

.auth-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--primary) 16%, transparent), transparent 34%),
    radial-gradient(circle at left 18%, color-mix(in srgb, var(--primary) 10%, transparent), transparent 28%),
    linear-gradient(transparent 95%, color-mix(in srgb, var(--primary) 10%, transparent) 96%, transparent 100%),
    linear-gradient(90deg, transparent 95%, color-mix(in srgb, var(--primary) 10%, transparent) 96%, transparent 100%);
  background-size: auto, auto, 28px 28px, 28px 28px;
  opacity: 0.72;
  pointer-events: none;
}

.auth-card > * {
  position: relative;
  z-index: 1;
}

.auth-topbar {
  display: flex;
  justify-content: end;
}

.auth-brand,
.auth-form-copy {
  display: grid;
  gap: 8px;
}

.auth-brand {
  justify-items: center;
  text-align: center;
  padding: 4px 10px 6px;
}

.auth-logo {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 82px;
  height: 82px;
  border-radius: 24px;
  border: 1px solid color-mix(in srgb, var(--primary) 24%, var(--line));
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--primary) 14%, var(--panel-strong)), color-mix(in srgb, var(--panel-strong) 92%, transparent));
  color: var(--primary);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3);
  font: 700 28px/1 "IBM Plex Mono", monospace;
  letter-spacing: -0.08em;
}

.auth-logo::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 16px;
  border: 1px solid color-mix(in srgb, var(--primary) 16%, transparent);
  opacity: 0.9;
}

.auth-brand h1 {
  max-width: none;
}

.auth-brand .intro,
.auth-form-copy p {
  color: var(--muted);
  max-width: 42ch;
}

.auth-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.auth-form {
  display: grid;
  gap: 14px;
}

.auth-field {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

input:not([type="checkbox"]):not([type="file"]) {
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--control-bg);
  color: var(--text);
  padding: 14px 16px;
  font: inherit;
  outline: none;
}

input:not([type="checkbox"]):not([type="file"]):focus {
  border-color: color-mix(in srgb, var(--primary) 48%, var(--line));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 12%, transparent);
}

.auth-status {
  min-height: 42px;
  display: flex;
  align-items: center;
  white-space: normal;
}

.hero,
.panel {
  backdrop-filter: blur(14px);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  border-radius: 28px;
  padding: 18px 22px;
  margin-bottom: 18px;
}

.hero-copy {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.eyebrow {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
}

h1, h2, h3, p {
  margin: 0;
}

h1 {
  font-size: clamp(1.4rem, 2.3vw, 2.4rem);
  line-height: 1;
  max-width: 18ch;
  letter-spacing: -0.03em;
}

.intro {
  margin-top: 0;
  max-width: 54ch;
  color: var(--muted);
  font-size: 0.96rem;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: nowrap;
  justify-content: end;
  align-items: center;
  flex-shrink: 0;
}

.hero-side {
  display: grid;
  gap: 10px;
  justify-items: end;
}

.session-bar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: end;
}

.session-pill {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--control-soft-bg);
  color: var(--muted);
  font: 500 13px/1 "IBM Plex Mono", monospace;
}

.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
  user-select: none;
}

.theme-label {
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.switch-track {
  position: relative;
  width: 54px;
  height: 30px;
}

.switch-track input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  margin: 0;
  z-index: 2;
}

.switch-track::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: var(--control-soft-bg);
  border: 1px solid var(--line);
}

.switch-thumb {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 20px;
  height: 20px;
  border-radius: 999px;
  background: var(--primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
  transition: transform 0.2s ease, background 0.2s ease;
}

.switch-track input:checked + .switch-thumb {
  transform: translateX(24px);
}

.editor-controls {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: end;
}

.select-wrap {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
}

select {
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--control-bg);
  color: var(--text);
  padding: 10px 14px;
  font: inherit;
}

.file-meta {
  color: var(--muted);
  font-size: 14px;
}

button {
  border: none;
  border-radius: 999px;
  padding: 12px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  background: var(--primary);
  color: var(--button-text);
  transition: transform 0.18s ease, background 0.18s ease;
  white-space: nowrap;
}

button:hover {
  transform: translateY(-1px);
  background: var(--primary-strong);
}

button.secondary,
button.ghost {
  color: var(--text);
  background: var(--control-soft-bg);
  border: 1px solid var(--line);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
  gap: 24px;
  align-items: start;
  grid-template-areas:
    "editor preview"
    "evolution evolution";
}

.panel {
  border-radius: 24px;
  padding: 22px;
}

.evolution-panel {
  grid-area: evolution;
}

.editor-panel {
  grid-area: editor;
  display: flex;
  flex-direction: column;
  height: var(--workspace-panel-height);
  min-height: var(--workspace-panel-height);
}

.preview-panel {
  grid-area: preview;
  align-self: start;
  display: flex;
  flex-direction: column;
  height: var(--workspace-panel-height);
  min-height: var(--workspace-panel-height);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 18px;
}

.panel-header p {
  color: var(--muted);
  margin-top: 6px;
}

.status {
  white-space: nowrap;
  padding: 9px 12px;
  border-radius: 999px;
  background: var(--control-soft-bg);
  border: 1px solid var(--line);
  font-size: 14px;
}

.status.ok {
  color: var(--success);
}

.status.error {
  color: var(--danger);
}

.status.warn {
  color: #9b7a24;
}

.editor-surface {
  position: relative;
  flex: 1;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--editor-bg);
  overflow: hidden;
}

.highlight-layer,
textarea {
  margin: 0;
  width: 100%;
  height: 100%;
  min-height: 100%;
  padding: 18px;
  font: 14px/1.6 "IBM Plex Mono", monospace;
  white-space: pre-wrap;
  word-break: break-word;
  tab-size: 2;
}

.highlight-layer {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
  color: var(--editor-text);
}

textarea {
  position: relative;
  z-index: 2;
  resize: none;
  border: 0;
  background: transparent;
  color: transparent;
  caret-color: var(--editor-caret);
  overflow: auto;
}

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

.token-key {
  color: var(--token-key);
}

.token-string {
  color: var(--token-string);
}

.token-number {
  color: var(--token-number);
}

.token-boolean {
  color: var(--token-boolean);
}

.token-null {
  color: var(--token-null);
}

.token-comment {
  color: var(--token-comment);
}

.token-punctuation,
.token-dash {
  color: var(--token-punctuation);
}

.token-plain {
  color: var(--editor-text);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.preview-panel .metrics {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.preview-panel h3 {
  margin-bottom: 10px;
}

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.tab-button {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-strong) 86%, transparent);
  color: var(--muted);
}

.tab-button.active {
  background: var(--primary);
  color: var(--button-text);
  border-color: transparent;
}

.tab-count {
  min-width: 28px;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--tab-count-bg);
  color: inherit;
  font-size: 13px;
  line-height: 1;
  text-align: center;
}

.tab-button.active .tab-count {
  background: var(--tab-count-active-bg);
}

.tab-panels {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.metric-card,
.item-card,
.timeline-item,
.diff-box {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-strong);
}

.metric-card {
  padding: 16px;
}

.preview-panel .metric-card {
  padding: 10px 12px;
  border-radius: 14px;
}

.metric-label {
  display: block;
  color: var(--muted);
  margin-bottom: 10px;
}

.preview-panel .metric-label {
  margin-bottom: 4px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.metric-value {
  font-size: 1.8rem;
}

.preview-panel .metric-value {
  font-size: 1.15rem;
  line-height: 1.1;
}

.preview-columns,
.timeline-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.card-list,
.timeline,
.diff-box,
.diff-stack {
  display: grid;
  gap: 12px;
}

.preview-panel .card-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding-right: 6px;
}

.item-card {
  display: grid;
  gap: 8px;
  padding: 14px;
}

.item-card-action {
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.item-card-action:hover,
.item-card-action:focus-visible {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--primary) 35%, var(--line));
  box-shadow: 0 10px 24px rgba(74, 101, 134, 0.08);
  outline: none;
}

.item-card code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  min-width: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.item-head {
  display: grid;
  gap: 8px;
}

.item-head-endpoint {
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
}

.item-head-model {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
}

.item-card p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.item-card-action-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 32px;
  padding: 0 10px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-strong) 88%, transparent);
  color: var(--primary);
  font: 700 12px/1 "IBM Plex Mono", monospace;
}

.item-card-action-button:hover {
  background: var(--control-soft-bg);
}

.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 8px;
  border-radius: 999px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  line-height: 1;
  border: 1px solid transparent;
}

.pill-get {
  background: var(--pill-get-bg);
  color: var(--pill-get-color);
  border-color: var(--pill-get-border);
}

.pill-post {
  background: var(--pill-post-bg);
  color: var(--pill-post-color);
  border-color: var(--pill-post-border);
}

.pill-delete {
  background: var(--pill-delete-bg);
  color: var(--pill-delete-color);
  border-color: var(--pill-delete-border);
}

.pill-patch,
.pill-put {
  background: var(--pill-patch-bg);
  color: var(--pill-patch-color);
  border-color: var(--pill-patch-border);
}

.pill-options,
.pill-head {
  background: var(--pill-neutral-bg);
  color: var(--pill-neutral-color);
  border-color: var(--pill-neutral-border);
}

.timeline-item {
  padding: 14px;
}

.timeline-item.selected {
  border-color: var(--timeline-selected-border);
  box-shadow: inset 0 0 0 1px var(--timeline-selected-shadow);
}

.timeline-item button {
  margin-top: 12px;
  padding: 10px 14px;
}

.diff-box {
  min-height: 140px;
  padding: 16px;
}

.diff-box ul {
  margin: 0;
  padding-left: 20px;
}

.line-diff {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--line-diff-bg);
  color: var(--line-diff-text);
  overflow: hidden;
}

.line-diff-header,
.diff-row {
  display: grid;
  grid-template-columns: 56px 1fr 56px 1fr;
}

.line-diff-header {
  background: var(--line-diff-header-bg);
  color: var(--line-diff-header-text);
  font: 12px/1.4 "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.line-diff-header span,
.diff-row span,
.diff-row code {
  padding: 8px 12px;
}

.line-diff-body {
  max-height: 420px;
  overflow: auto;
}

.diff-row {
  font: 13px/1.5 "IBM Plex Mono", monospace;
  border-top: 1px solid var(--line-diff-border);
}

.diff-row code {
  white-space: pre-wrap;
  word-break: break-word;
}

.diff-row.same {
  background: transparent;
}

.diff-row.added {
  background: var(--diff-added-bg);
}

.diff-row.removed {
  background: var(--diff-removed-bg);
}

.diff-row.changed {
  background: var(--diff-changed-bg);
}

.diff-row.context {
  background: var(--diff-context-bg);
  color: var(--diff-context-text);
}

.diff-row .line-no {
  color: var(--diff-line-no);
  text-align: right;
}

.diff-legend {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px 16px 0;
  color: var(--muted);
  font-size: 13px;
}

.legend-chip {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.legend-chip::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

.legend-chip.same::before {
  background: rgba(255, 255, 255, 0.35);
}

.legend-chip.added::before {
  background: rgba(52, 156, 128, 0.7);
}

.legend-chip.removed::before {
  background: rgba(192, 93, 104, 0.7);
}

.legend-chip.changed::before {
  background: rgba(92, 143, 197, 0.72);
}

.empty {
  color: var(--muted);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 24px;
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(18, 29, 41, 0.42);
  backdrop-filter: blur(10px);
}

.modal-dialog {
  position: relative;
  z-index: 1;
  width: min(920px, 100%);
  max-height: min(82vh, 900px);
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 16px;
  padding: 22px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 16px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.dto-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.dto-lang-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.dto-lang-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-strong) 88%, transparent);
  color: var(--muted);
  font: 700 12px/1 "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.dto-lang-button.active {
  background: var(--primary);
  color: var(--button-text);
  border-color: transparent;
}

.dto-code {
  margin: 0;
  overflow: auto;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--editor-bg);
  color: var(--editor-text);
  font: 14px/1.65 "IBM Plex Mono", monospace;
  white-space: pre;
}

@media (max-width: 960px) {
  .workspace,
  .preview-columns,
  .timeline-layout,
  .metrics {
    grid-template-columns: 1fr;
  }

  .workspace {
    grid-template-areas:
      "editor"
      "preview"
      "evolution";
  }

  .preview-panel .metrics {
    grid-template-columns: 1fr;
  }

  .preview-panel .card-list {
    max-height: 38vh;
  }

  .hero {
    align-items: start;
    flex-direction: column;
  }

  .hero-side {
    width: 100%;
    justify-items: start;
  }

  .session-bar,
  .hero-actions {
    justify-content: start;
    flex-wrap: wrap;
  }

  .modal-dialog,
  .modal-header {
    grid-template-rows: auto;
  }

  .modal-header,
  .modal-actions,
  .dto-toolbar,
  .dto-lang-list {
    flex-direction: column;
    align-items: stretch;
  }

  .editor-panel {
    height: auto;
    min-height: auto;
  }

  .preview-panel {
    height: auto;
    min-height: auto;
    align-self: auto;
  }

  .editor-controls {
    justify-content: start;
  }

  .line-diff-header,
  .diff-row {
    grid-template-columns: 40px 1fr 40px 1fr;
  }

  textarea {
    min-height: 520px;
    height: 520px;
    resize: none;
  }

  .editor-surface,
  .highlight-layer {
    flex: none;
    height: 520px;
    min-height: 520px;
  }

  .tab-panels,
  .tab-panel.active,
  .preview-panel .card-list {
    flex: none;
    min-height: 0;
  }
}