:root {
  color-scheme: dark;
  --bg: oklch(0.14 0.025 250);
  --bg-deep: oklch(0.105 0.025 250);
  --surface: oklch(0.175 0.03 250);
  --surface-raised: oklch(0.205 0.035 250);
  --surface-muted: oklch(0.155 0.02 250);
  --ink: oklch(0.95 0.012 240);
  --ink-strong: oklch(0.985 0.006 240);
  --muted: oklch(0.72 0.025 245);
  --muted-strong: oklch(0.81 0.02 245);
  --border: oklch(0.31 0.035 247);
  --border-strong: oklch(0.43 0.055 245);
  --primary: oklch(0.78 0.15 158);
  --primary-hover: oklch(0.84 0.14 158);
  --primary-ink: oklch(0.16 0.045 158);
  --secondary: oklch(0.72 0.12 262);
  --info: oklch(0.72 0.13 247);
  --success: oklch(0.78 0.15 158);
  --warning: oklch(0.79 0.16 79);
  --danger: oklch(0.7 0.18 27);
  --focus: oklch(0.78 0.15 158);
  --radius-sm: 6px;
  --radius-md: 9px;
  --radius-lg: 12px;
  --header-height: 64px;
  --rail-width: 116px;
  --z-sticky: 20;
  --z-toast: 50;
  font-family:
    Inter, Aptos, "Segoe UI Variable", "Segoe UI", "PingFang SC", "Microsoft YaHei",
    ui-sans-serif, system-ui, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg-deep);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  color: inherit;
}

a {
  color: var(--info);
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: var(--z-toast);
  padding: 0.65rem 0.9rem;
  transform: translateY(-160%);
  background: var(--primary);
  border-radius: var(--radius-sm);
  color: var(--primary-ink);
  font-weight: 750;
}

.skip-link:focus {
  transform: translateY(0);
}

.app-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  padding: 0 1.5rem;
  background: color-mix(in oklch, var(--bg-deep) 96%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--ink-strong);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: transparent;
}

.brand-mark::before {
  width: 34px;
  height: 34px;
  background: var(--primary);
  content: "";
  -webkit-mask: url("./assets/icons/shield-lock.svg") center / contain no-repeat;
  mask: url("./assets/icons/shield-lock.svg") center / contain no-repeat;
}

.brand > span:last-child {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand strong {
  color: var(--ink-strong);
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.brand > span:last-child > span {
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.76rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.local-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted-strong);
  font-size: 0.8rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px color-mix(in oklch, var(--success) 55%, transparent);
}

.language-switch {
  display: flex;
  padding: 3px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.language-switch button {
  min-width: 50px;
  min-height: 34px;
  padding: 0.35rem 0.65rem;
  background: transparent;
  border: 0;
  border-radius: 4px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 700;
}

.language-switch button:hover {
  color: var(--ink);
}

.language-switch button[aria-pressed="true"] {
  background: color-mix(in oklch, var(--primary) 12%, var(--surface-raised));
  color: var(--primary);
  box-shadow: inset 0 0 0 1px color-mix(in oklch, var(--primary) 70%, transparent);
}

main {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  width: 100%;
  min-height: calc(100vh - var(--header-height));
}

.tool-tabs {
  position: sticky;
  top: var(--header-height);
  grid-column: 1;
  grid-row: 1 / span 6;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-height: calc(100vh - var(--header-height));
  padding: 1.2rem 0.65rem;
  background: var(--bg-deep);
  border-right: 1px solid var(--border);
}

.tool-tabs button {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  min-height: 92px;
  padding: 0.8rem 0.45rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--muted);
  cursor: pointer;
  text-align: center;
}

.tool-tabs button::before {
  width: 25px;
  height: 25px;
  margin-bottom: 0.25rem;
  background: currentColor;
  content: "";
}

.tool-tabs button[data-tab="builder"]::before {
  -webkit-mask: url("./assets/icons/link-plus.svg") center / contain no-repeat;
  mask: url("./assets/icons/link-plus.svg") center / contain no-repeat;
}

.tool-tabs button[data-tab="audit"]::before {
  -webkit-mask: url("./assets/icons/file-search.svg") center / contain no-repeat;
  mask: url("./assets/icons/file-search.svg") center / contain no-repeat;
}

.tool-tabs button[data-tab="batch"]::before {
  -webkit-mask: url("./assets/icons/layers-subtract.svg") center / contain no-repeat;
  mask: url("./assets/icons/layers-subtract.svg") center / contain no-repeat;
}

.tool-tabs button::after {
  position: absolute;
  top: 15%;
  bottom: 15%;
  left: -0.65rem;
  width: 3px;
  background: transparent;
  border-radius: 0 3px 3px 0;
  content: "";
}

.tool-tabs button:hover {
  background: var(--surface-muted);
  color: var(--ink);
}

.tool-tabs button[aria-selected="true"] {
  background: color-mix(in oklch, var(--primary) 8%, var(--surface));
  border-color: var(--border-strong);
  color: var(--primary);
}

.tool-tabs button[aria-selected="true"]::after {
  background: var(--primary);
}

.tool-tabs button > span {
  font-size: 0.84rem;
  font-weight: 760;
}

.tool-tabs small {
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 550;
}

.tool-panel {
  grid-column: 2;
  min-width: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.workspace-grid,
.audit-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 29%);
}

.tool-form,
.quality-panel,
.history-section,
.audit-details,
.batch-results,
.pro-hypothesis {
  padding: 1.65rem 1.8rem;
}

.tool-form {
  min-width: 0;
}

.quality-panel {
  min-width: 0;
  background: var(--bg-deep);
  border-left: 1px solid var(--border);
}

.monitor-kicker {
  margin: 0 0 0.75rem;
  color: var(--primary);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.66rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-heading,
.result-heading,
.quality-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.2rem;
}

.section-heading p,
.quality-header p,
.result-heading p {
  max-width: 66ch;
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.84rem;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--ink-strong);
  line-height: 1.22;
  text-wrap: balance;
}

h2 {
  margin-bottom: 0.25rem;
  font-size: 1.22rem;
  letter-spacing: -0.015em;
}

h3 {
  margin-bottom: 0.2rem;
  font-size: 0.92rem;
  letter-spacing: -0.005em;
}

.field-grid {
  display: grid;
  gap: 0.9rem;
}

.field-grid-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.field {
  min-width: 0;
  margin-bottom: 1.05rem;
}

.field label,
.policy-fields legend {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: 0.42rem;
  color: var(--muted-strong);
  font-size: 0.77rem;
  font-weight: 740;
  letter-spacing: 0.015em;
}

.field label span:first-child:not([data-i18n]),
.advanced-content .field label {
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

.required-mark {
  color: var(--danger);
}

input,
textarea,
select {
  width: 100%;
  background: var(--surface-muted);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--ink-strong);
  outline: none;
  transition:
    border-color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

input:hover,
textarea:hover,
select:hover {
  border-color: color-mix(in oklch, var(--secondary) 60%, var(--border));
}

input,
select {
  min-height: 44px;
  padding: 0.62rem 0.75rem;
}

textarea {
  min-height: 88px;
  padding: 0.75rem;
  line-height: 1.45;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: oklch(0.63 0.02 245);
  opacity: 1;
}

input:focus,
textarea:focus,
select:focus,
button:focus-visible,
summary:focus-visible,
a:focus-visible {
  border-color: var(--focus);
  outline: 2px solid color-mix(in oklch, var(--focus) 38%, transparent);
  outline-offset: 2px;
}

.field-hint {
  margin: 0.34rem 0 0;
  color: var(--muted);
  font-size: 0.7rem;
}

.advanced-fields {
  margin: 0.15rem 0 0;
  border-top: 1px solid var(--border);
}

.advanced-fields summary {
  padding: 0.9rem 0;
  color: var(--ink);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 700;
}

.advanced-fields summary::marker {
  color: var(--primary);
}

.advanced-content {
  padding: 0.15rem 0 0.2rem;
}

.policy-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.25rem;
  margin: 0.1rem 0 0;
  padding: 0.95rem;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.policy-fields legend {
  padding: 0 0.3rem;
}

.check-control,
.select-control {
  display: inline-flex;
  align-items: center;
  gap: 0.52rem;
  color: var(--muted-strong);
  font-size: 0.78rem;
}

.check-control input {
  width: 18px;
  min-height: 18px;
  accent-color: var(--primary);
}

.select-control select {
  width: auto;
  min-height: 36px;
  padding-block: 0.32rem;
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
}

.result-block {
  grid-column: 1 / -1;
  padding: 0.75rem 1.8rem 0.85rem;
  background: color-mix(in oklch, var(--primary) 3%, var(--bg-deep));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid color-mix(in oklch, var(--primary) 45%, var(--border));
}

.result-heading {
  align-items: center;
  margin-bottom: 0.4rem;
}

.result-heading h3 {
  color: var(--primary);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.8rem;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

#generated-url {
  min-height: 54px;
  color: var(--primary);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.76rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.6rem;
}

.button-row.align-start {
  justify-content: flex-start;
}

.primary-button,
.secondary-button,
.text-button {
  min-height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.79rem;
  font-weight: 740;
  transition:
    background-color 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.56rem 0.9rem;
}

.primary-button {
  background: var(--primary);
  border: 1px solid var(--primary);
  color: var(--primary-ink);
}

.primary-button:hover:not(:disabled) {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
}

.secondary-button {
  background: var(--surface-muted);
  border: 1px solid var(--border-strong);
  color: var(--ink);
}

.secondary-button:hover:not(:disabled) {
  background: var(--surface-raised);
  border-color: var(--secondary);
}

.text-button {
  min-height: auto;
  padding: 0.35rem;
  background: transparent;
  border: 0;
  color: var(--info);
}

.text-button:hover:not(:disabled) {
  color: var(--primary);
}

#copy-url::before,
#copy-clean-url::before {
  width: 16px;
  height: 16px;
  background: currentColor;
  content: "";
  -webkit-mask: url("./assets/icons/copy.svg") center / contain no-repeat;
  mask: url("./assets/icons/copy.svg") center / contain no-repeat;
}

#save-history::before {
  width: 16px;
  height: 16px;
  background: currentColor;
  content: "";
  -webkit-mask: url("./assets/icons/bookmark.svg") center / contain no-repeat;
  mask: url("./assets/icons/bookmark.svg") center / contain no-repeat;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
  transform: none;
}

.inline-status {
  min-height: 1rem;
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.74rem;
}

.quality-header {
  align-items: flex-start;
}

.quality-badge {
  flex: 0 0 auto;
  padding: 0.28rem 0.52rem;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 760;
}

.quality-badge[data-state="pass"] {
  border-color: color-mix(in oklch, var(--success) 42%, var(--border));
  color: var(--success);
}

.quality-badge[data-state="warning"] {
  border-color: color-mix(in oklch, var(--warning) 45%, var(--border));
  color: var(--warning);
}

.quality-badge[data-state="error"] {
  border-color: color-mix(in oklch, var(--danger) 48%, var(--border));
  color: var(--danger);
}

.issue-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.issue-item {
  display: grid;
  grid-template-columns: 23px minmax(0, 1fr);
  gap: 0.65rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.78rem;
}

.issue-item:last-child {
  border-bottom: 0;
}

.issue-icon {
  width: 20px;
  height: 20px;
  background: currentColor;
  font-size: 0;
}

.issue-item[data-level="error"] .issue-icon {
  color: var(--danger);
  -webkit-mask: url("./assets/icons/info-circle.svg") center / contain no-repeat;
  mask: url("./assets/icons/info-circle.svg") center / contain no-repeat;
}

.issue-item[data-level="warning"] .issue-icon {
  color: var(--warning);
  -webkit-mask: url("./assets/icons/alert-triangle.svg") center / contain no-repeat;
  mask: url("./assets/icons/alert-triangle.svg") center / contain no-repeat;
}

.issue-item[data-level="pass"] .issue-icon {
  color: var(--success);
  -webkit-mask: url("./assets/icons/circle-check.svg") center / contain no-repeat;
  mask: url("./assets/icons/circle-check.svg") center / contain no-repeat;
}

.issue-item strong {
  display: block;
  margin-bottom: 0.15rem;
  color: var(--ink);
  line-height: 1.35;
}

.issue-item p,
.empty-issue {
  margin: 0;
  color: var(--muted);
}

.empty-issue {
  padding: 0.8rem 0;
  font-size: 0.78rem;
}

.policy-note {
  margin-top: 1rem;
  padding: 0.9rem;
  background: color-mix(in oklch, var(--info) 8%, var(--surface-muted));
  border: 1px solid color-mix(in oklch, var(--info) 38%, var(--border));
  border-radius: var(--radius-md);
  color: var(--info);
}

.policy-note strong {
  font-size: 0.78rem;
}

.policy-note p {
  margin: 0.3rem 0 0;
  color: color-mix(in oklch, var(--info) 74%, var(--muted));
  font-size: 0.75rem;
}

.trust-list {
  display: flex;
  flex-direction: column;
  gap: 0.58rem;
  margin: 0;
  padding: 0;
  color: var(--muted-strong);
  font-size: 0.76rem;
  list-style: none;
}

.monitor-trust {
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.trust-list li {
  display: flex;
  align-items: center;
  gap: 0.48rem;
}

.trust-list li::before {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  background: var(--success);
  content: "";
  -webkit-mask: url("./assets/icons/circle-check.svg") center / contain no-repeat;
  mask: url("./assets/icons/circle-check.svg") center / contain no-repeat;
}

.history-section,
.audit-details,
.batch-results,
.pro-hypothesis {
  border-top: 1px solid var(--border);
}

.history-section {
  background: var(--bg-deep);
  padding-block: 0.9rem;
}

.history-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}

.history-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
}

.history-row:last-child {
  border-bottom: 0;
}

.history-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.3rem;
  color: var(--muted);
  font-size: 0.7rem;
}

.history-url {
  display: block;
  overflow: hidden;
  color: var(--muted-strong);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-state {
  margin: 0;
  padding: 0.55rem 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.audit-results {
  min-height: 360px;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.76rem;
}

th,
td {
  padding: 0.68rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-muted);
  color: var(--muted);
  font-weight: 700;
}

tr:last-child td {
  border-bottom: 0;
}

td code,
.batch-format code {
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

.batch-format {
  margin-bottom: 1rem;
  padding: 0.68rem 0.75rem;
  overflow-x: auto;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--primary);
  font-size: 0.72rem;
  white-space: nowrap;
}

.batch-table {
  min-width: 820px;
}

.batch-url-cell {
  max-width: 440px;
  word-break: break-all;
}

.row-status {
  display: inline-flex;
  padding: 0.18rem 0.42rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 0.66rem;
  font-weight: 750;
}

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

.row-status.warning {
  color: var(--warning);
}

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

.pro-hypothesis {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background: color-mix(in oklch, var(--secondary) 6%, var(--surface-muted));
}

.pro-hypothesis > div {
  max-width: 720px;
}

.product-note {
  margin: 0 0 0.35rem;
  color: var(--secondary);
  font-size: 0.7rem;
  font-weight: 720;
}

.pro-hypothesis p:not(.product-note) {
  margin: 0;
  color: var(--muted);
}

.method-section {
  grid-column: 2;
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.6fr);
  gap: 3rem;
  padding: 2.5rem 2rem;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
}

.method-section > div > p {
  max-width: 54ch;
  margin: 0;
  color: var(--muted);
}

.method-section dl {
  margin: 0;
}

.method-section dl > div {
  display: grid;
  grid-template-columns: minmax(130px, 0.45fr) minmax(0, 1fr);
  gap: 1rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--border);
}

.method-section dl > div:last-child {
  border-bottom: 1px solid var(--border);
}

.method-section dt {
  color: var(--ink);
  font-weight: 720;
}

.method-section dd {
  margin: 0;
  color: var(--muted);
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem 1rem calc(var(--rail-width) + 1.5rem);
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.7rem;
}

footer p {
  margin: 0;
}

.toast {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: var(--z-toast);
  max-width: min(360px, calc(100vw - 2rem));
  padding: 0.72rem 0.9rem;
  background: var(--primary);
  border-radius: var(--radius-sm);
  color: var(--primary-ink);
  font-size: 0.8rem;
  font-weight: 720;
}

@media (max-width: 1060px) {
  :root {
    --rail-width: 96px;
  }

  .workspace-grid,
  .audit-layout {
    grid-template-columns: minmax(0, 1fr) minmax(290px, 34%);
  }

  .tool-form,
  .quality-panel,
  .history-section,
  .audit-details,
  .batch-results,
  .pro-hypothesis {
    padding-inline: 1.25rem;
  }

  .result-block {
    padding-inline: 1.25rem;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 60px;
  }

  .app-header {
    padding-inline: 1rem;
  }

  main {
    display: block;
  }

  .tool-tabs {
    position: sticky;
    top: var(--header-height);
    z-index: calc(var(--z-sticky) - 1);
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    min-height: auto;
    padding: 0.45rem 0.7rem;
    background: color-mix(in oklch, var(--bg-deep) 96%, transparent);
    border-right: 0;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
  }

  .tool-tabs button {
    flex-direction: row;
    min-height: 46px;
    padding: 0.5rem 0.65rem;
  }

  .tool-tabs button::before {
    width: 19px;
    height: 19px;
    margin: 0;
  }

  .tool-tabs button::after {
    top: auto;
    right: 16%;
    bottom: -0.45rem;
    left: 16%;
    width: auto;
    height: 3px;
    border-radius: 3px 3px 0 0;
  }

  .workspace-grid,
  .audit-layout {
    grid-template-columns: 1fr;
  }

  .quality-panel {
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .method-section {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  footer {
    padding-left: 1rem;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 14px;
  }

  .brand > span:last-child > span,
  .local-status > span:last-child {
    display: none;
  }

  .header-actions {
    gap: 0.65rem;
  }

  .language-switch button {
    min-width: 42px;
  }

  .tool-tabs small {
    display: none;
  }

  .tool-tabs button {
    gap: 0.35rem;
    padding-inline: 0.35rem;
  }

  .tool-form,
  .quality-panel,
  .history-section,
  .audit-details,
  .batch-results,
  .pro-hypothesis {
    padding: 1.15rem 1rem;
  }

  .field-grid-three {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .section-heading,
  .result-heading,
  .quality-header,
  .pro-hypothesis {
    align-items: flex-start;
    flex-direction: column;
  }

  .result-block {
    padding: 1rem;
  }

  .result-heading .button-row,
  .result-heading .primary-button,
  .result-heading .secondary-button {
    width: 100%;
  }

  .button-row {
    justify-content: stretch;
  }

  .button-row > button {
    flex: 1 1 auto;
  }

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

  .select-control {
    flex-wrap: wrap;
  }

  .select-control select {
    width: 100%;
  }

  .history-row {
    grid-template-columns: 1fr;
  }

  .history-row .secondary-button {
    justify-self: start;
  }

  .method-section {
    padding: 2rem 1rem;
  }

  .method-section dl > div {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}