:root {
  --ink: #172033;
  --ink-soft: #586174;
  --navy: #132238;
  --navy-light: #1e3554;
  --teal: #0f766e;
  --teal-dark: #0b5d57;
  --amber: #f59e0b;
  --paper: #ffffff;
  --canvas: #f4f6fa;
  --panel: #f8fafc;
  --line: #dce1ea;
  --line-strong: #bdc5d2;
  --success: #0f766e;
  --warning: #a65d00;
  --danger: #b23a24;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius: 14px;
  --radius-sm: 9px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
}

[hidden] {
  display: none !important;
}

a {
  color: var(--teal-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

button,
select {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(245, 158, 11, 0.55);
  outline-offset: 2px;
}

.wrap {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  color: #fff;
  background: var(--navy);
  border-radius: 7px;
  transform: translateY(-140%);
}

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
  font-size: 20px;
  font-weight: 850;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.logo > span:last-child > span {
  color: var(--teal);
}

.logo-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: #fff;
  background: var(--navy);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 12px;
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-main a {
  padding: 10px 13px;
  color: var(--ink-soft);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.nav-main a:hover {
  color: var(--navy);
  background: var(--canvas);
}

.site-main {
  padding-block: 38px 80px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  color: var(--ink-soft);
  font-size: 13px;
}

.breadcrumbs a {
  color: inherit;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
  gap: 36px;
  align-items: end;
  padding: 42px 0 34px;
}

.eyebrow {
  display: block;
  margin-bottom: 10px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--navy);
  letter-spacing: -0.035em;
  line-height: 1.12;
}

h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
}

h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
}

h3 {
  margin: 24px 0 8px;
  font-size: 21px;
}

.lead {
  max-width: 800px;
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-size: clamp(17px, 2vw, 21px);
}

.privacy-note {
  padding: 18px;
  color: #fff;
  background: var(--navy);
  border-radius: var(--radius);
}

.privacy-note strong,
.privacy-note span {
  display: block;
}

.privacy-note span {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.page-intro {
  margin-bottom: 28px;
}

.page-intro h1 {
  font-size: clamp(38px, 6vw, 62px);
}

.workbench,
.content-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.workbench {
  padding: 22px;
  border-top: 5px solid var(--teal);
}

.flagship-workbench {
  margin-bottom: 26px;
}

.workbench-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
  margin-bottom: 16px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 750;
}

input,
select,
textarea {
  width: 100%;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

input,
select {
  min-height: 45px;
  padding: 9px 12px;
}

textarea {
  min-height: 180px;
  padding: 15px;
  resize: vertical;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.55;
  tab-size: 2;
}

textarea[readonly] {
  background: #f7fafb;
}

input:disabled,
select:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.workbench-toolbar > label {
  min-width: 170px;
  flex: 1 1 180px;
}

.workbench-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.editor-panel {
  min-width: 0;
  display: grid;
  gap: 10px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-head label {
  color: var(--navy);
  font-size: 14px;
}

.panel-head span {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11px;
}

.editor-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  color: var(--navy);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}

.button:hover {
  border-color: var(--navy);
}

.button.primary {
  color: #fff;
  background: var(--teal);
  border-color: var(--teal);
}

.button.primary:hover {
  background: var(--teal-dark);
}

.button.subtle {
  color: var(--ink-soft);
  background: var(--canvas);
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
  margin-top: 16px;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.check {
  min-height: 45px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 11px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.check input {
  width: 18px;
  min-height: 18px;
  margin: 0;
}

.tool-status {
  min-height: 24px;
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 13px;
}

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

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

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

.clipboard-fallback {
  position: fixed;
  opacity: 0;
  pointer-events: none;
}

.result-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 16px 0 12px;
  padding: 5px;
  background: var(--canvas);
  border-radius: 9px;
}

.result-tabs button {
  min-height: 40px;
  flex: 1 1 130px;
  padding: 8px 10px;
  color: var(--ink-soft);
  background: transparent;
  border: 0;
  border-radius: 7px;
  font-size: 12px;
  font-weight: 800;
}

.result-tabs button[aria-selected="true"] {
  color: #fff;
  background: var(--navy);
}

.result-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 9px;
  margin-top: 16px;
}

.result-metrics > div {
  padding: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.result-metrics span,
.result-metrics strong {
  display: block;
}

.result-metrics span {
  color: var(--ink-soft);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.result-metrics strong {
  margin-top: 4px;
  color: var(--navy);
  font-family: var(--mono);
  font-size: 20px;
}

.column-picker {
  margin: 16px 0 0;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.column-picker legend {
  padding-inline: 7px;
  color: var(--navy);
  font-size: 13px;
  font-weight: 800;
}

.column-picker > div {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.example-row {
  margin: -4px 0 14px;
}

.example-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 12px;
}

.example-loader {
  align-self: end;
}

.field-help {
  margin: 0;
  color: var(--ink-soft);
  font-size: 12px;
}

.merge-document-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.merge-document {
  min-width: 0;
  padding: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.merge-document textarea {
  margin-top: 8px;
}

.merge-output,
.filter-output-panel {
  margin-top: 16px;
}

.chunk-result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.chunk-card {
  min-width: 0;
  padding: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.chunk-card textarea {
  margin-block: 8px;
}

.format-version-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  padding: 12px 14px;
  color: #fff;
  background: var(--navy);
  border-radius: var(--radius-sm);
}

.format-version-note span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
}

.diagnostic-panel:not(:empty) {
  margin-top: 14px;
  padding: 14px;
  color: var(--danger);
  background: #fff4f1;
  border: 1px solid #efc1b7;
  border-radius: var(--radius-sm);
}

.diagnostic-panel p {
  margin: 6px 0;
}

.diagnostic-panel pre {
  margin: 8px 0 0;
  padding: 10px;
  overflow: auto;
  color: var(--ink);
  background: #fff;
  border-radius: 6px;
  font-family: var(--mono);
}

.related-inline {
  margin-top: 12px;
  font-size: 13px;
}

.workbench details {
  margin-top: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.workbench details summary {
  padding: 12px 14px;
  cursor: pointer;
  color: var(--navy);
  font-weight: 800;
}

.workbench details textarea {
  width: calc(100% - 28px);
  margin: 0 14px 14px;
}

.table-wrap {
  max-width: 100%;
  margin-top: 18px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.table-wrap:empty {
  display: none;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 13px;
}

caption {
  padding: 10px 12px;
  color: var(--ink-soft);
  background: var(--panel);
  text-align: left;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: #fff;
  background: var(--navy);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

td code {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin: 58px 0 16px;
}

.section-head h2 {
  margin: 0;
}

.section-head p {
  max-width: 540px;
  margin: 0;
  color: var(--ink-soft);
}

.tool-directory-section + .tool-directory-section {
  margin-top: 58px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

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

.compact-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tool-card {
  min-height: 185px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.15s, transform 0.15s;
}

.tool-card:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
}

.tool-card > span {
  color: var(--teal);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.tool-card strong {
  color: var(--navy);
  font-size: 19px;
}

.tool-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.content-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.55fr) minmax(0, 1.45fr);
  gap: 28px;
  align-items: start;
  margin-top: 64px;
}

.content-card {
  padding: 24px;
}

.prose-card p:first-child {
  margin-top: 0;
}

.prose-card p:last-child {
  margin-bottom: 0;
}

.prose-card li + li {
  margin-top: 6px;
}

.faq-section {
  max-width: 900px;
  margin-top: 64px;
}

.faq-section details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 9px;
}

.faq-section details + details {
  margin-top: 9px;
}

.faq-section summary {
  padding: 16px 18px;
  cursor: pointer;
  color: var(--navy);
  font-weight: 800;
}

.faq-section details p {
  margin: 0;
  padding: 0 18px 18px;
  color: var(--ink-soft);
}

.ad-slot {
  min-height: 90px;
  margin-block: 26px;
}

.not-found {
  min-height: 55vh;
  display: grid;
  align-content: center;
  justify-items: start;
}

.not-found p {
  color: var(--ink-soft);
}

.site-footer {
  color: rgba(255, 255, 255, 0.72);
  background: var(--navy);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding-block: 44px 32px;
}

.footer-grid p {
  max-width: 420px;
  color: rgba(255, 255, 255, 0.62);
}

.footer-logo {
  color: #fff;
}

.footer-logo .logo-mark {
  color: var(--navy);
  background: #fff;
}

.footer-grid nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 20px;
  align-content: start;
}

.footer-grid nav a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
}

.footer-grid nav a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-block: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
}

@media (max-width: 900px) {
  .hero,
  .content-section {
    grid-template-columns: 1fr;
  }

  .privacy-note {
    max-width: 520px;
  }

  .tool-grid,
  .directory-grid,
  .compact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .merge-document-list,
  .chunk-result-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .wrap {
    width: min(100% - 24px, 1180px);
  }

  .header-inner {
    min-height: 62px;
  }

  .nav-main a:first-child,
  .nav-main a:last-child {
    display: none;
  }

  .site-main {
    padding-block: 24px 56px;
  }

  .hero {
    padding-top: 18px;
  }

  h1 {
    font-size: 44px;
  }

  .workbench {
    padding: 14px;
  }

  .workbench-grid,
  .tool-grid,
  .directory-grid,
  .compact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .workbench-toolbar {
    display: grid;
    grid-template-columns: 1fr;
  }

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

  .section-head,
  .footer-bottom,
  .format-version-note {
    align-items: flex-start;
    flex-direction: column;
  }

  .tool-card {
    min-height: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}