:root {
  color: #20211d;
  background: #f7f8f3;
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --ink: #20211d;
  --muted: #858780;
  --canvas: #f7f8f3;
  --paper: #ffffff;
  --surface: #f2f1ed;
  --line: #e7e8e2;
  --line-strong: #d8d9d2;
  --gold: #f5b700;
  --gold-ink: #755900;
  --gold-soft: #fff7d8;
  --coral: #d94e38;
  --blue: #2f7ee6;
  --green: #147a50;
  --danger: #b93724;
  --page-width: 1302px;
  --rail-width: 220px;
  --content-width: 645px;
  --grid-gap: 106px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--canvas);
  font-size: 16px;
  line-height: 1.5;
}

a {
  color: inherit;
  text-underline-offset: 0.18em;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
select {
  font: inherit;
}

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

h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(2.25rem, 3.2vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(1.45rem, 2.2vw, 1.65rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.28;
}

h3 {
  margin-bottom: 8px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.4;
}

code,
pre,
.formula-block {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.marketing-page {
  min-height: 100vh;
}

.marketing-nav,
.marketing-main,
.marketing-footer,
.site-header,
body.marketing-page > main,
.site-footer {
  width: min(var(--page-width), calc(100% - 48px));
  margin-inline: auto;
}

.marketing-nav,
.site-header {
  display: flex;
  min-height: 52px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid transparent;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  text-decoration: none;
}

.brand img {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  object-fit: cover;
}

.nav-links,
.footer-links,
.site-footer nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-links a,
.footer-links a,
.text-link,
.site-footer a {
  color: #55574f;
  font-size: 0.78rem;
  text-decoration: none;
}

.nav-links a:hover,
.footer-links a:hover,
.text-link:hover,
.site-footer a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
}

.nav-cta,
.button-primary,
.button-secondary,
.primary-button {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  justify-content: center;
  padding: 0.48rem 0.82rem;
  border: 1px solid var(--ink);
  border-radius: 3px;
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition:
    color 150ms ease,
    background 150ms ease,
    border-color 150ms ease;
}

.nav-cta,
.button-primary,
.primary-button {
  color: #fff;
  background: var(--ink);
}

.button-secondary {
  color: var(--ink);
  border-color: var(--line-strong);
  background: transparent;
}

.nav-cta:hover,
.button-primary:hover,
.primary-button:hover {
  background: #393a34;
}

.button-secondary:hover {
  border-color: var(--ink);
  background: var(--paper);
}

.marketing-main {
  padding: 0 0 104px;
}

.hero,
.marketing-hero {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, var(--content-width)) 1fr;
  column-gap: var(--grid-gap);
  align-items: start;
  padding: 104px 0 72px;
}

.hero > .eyebrow,
.marketing-hero > .eyebrow {
  grid-column: 1;
  grid-row: 1;
  padding-top: 4px;
}

.hero > :not(.eyebrow),
.marketing-hero > :not(.eyebrow) {
  grid-column: 2;
}

.hero-copy {
  max-width: var(--content-width);
}

.hero h1,
.marketing-hero h1 {
  max-width: var(--content-width);
  margin-bottom: 22px;
  font-size: clamp(2.25rem, 3.2vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.eyebrow,
.tool-eyebrow {
  margin: 0 0 16px;
  color: #595b54;
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
}

.hero-copy > p:not(.eyebrow),
.section-heading > p:not(.eyebrow),
.lead,
.lede,
.tool-lede {
  max-width: var(--content-width);
  color: #55574f;
  font-size: 1rem;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.hero-visual {
  overflow: hidden;
  min-height: 320px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--surface);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}

.formula {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  width: 100%;
  max-width: var(--content-width);
  align-items: center;
  gap: 12px;
  margin: 32px 0 0;
  padding: 20px 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.formula-item {
  display: grid;
  gap: 4px;
}

.formula-item span,
.formula-item small {
  color: var(--muted);
  font-size: 0.72rem;
}

.formula-item strong {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.32;
}

.formula-item.cost strong {
  color: var(--coral);
}

.formula-item.result strong {
  color: var(--blue);
}

.formula-operator {
  color: #9b9d96;
  font-size: 1rem;
}

.section {
  padding: 68px 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, var(--content-width)) 1fr;
  column-gap: var(--grid-gap);
  max-width: none;
  margin-bottom: 22px;
}

.section-heading > .eyebrow {
  grid-column: 1;
  padding-top: 4px;
}

.section-heading > :not(.eyebrow) {
  grid-column: 2;
}

.feature-grid {
  display: grid;
  grid-template-columns: minmax(0, var(--content-width));
  gap: 0;
  margin-left: calc(var(--rail-width) + var(--grid-gap));
}

.feature-card,
.article-card,
.tool-link {
  min-width: 0;
  padding: 20px 0 22px;
  border: 0;
  border-top: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

a.feature-card,
a.article-card,
a.tool-link {
  text-decoration: none;
}

.feature-card p,
.step p,
.callout p,
.marketing-card p,
.marketing-card li {
  margin-bottom: 0;
  color: #55574f;
}

.feature-card:hover,
.article-card:hover,
.tool-link:hover {
  border-color: var(--ink);
}

.steps {
  display: grid;
  width: var(--content-width);
  gap: 0;
  margin: 0 0 0 calc(var(--rail-width) + var(--grid-gap));
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.step,
.steps > li {
  position: relative;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 14px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
  counter-increment: steps;
}

.step::before,
.steps > li::before {
  grid-column: 1;
  grid-row: 1 / span 2;
}

.step > strong,
.steps > li > strong {
  grid-column: 2;
  grid-row: 1;
}

.step > span,
.steps > li > span {
  grid-column: 2;
  grid-row: 2;
  color: #55574f;
}

.step::before,
.steps > li::before {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--ink);
  content: counter(steps);
  font-size: 0.68rem;
}

.callout {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, var(--content-width)) 1fr;
  column-gap: var(--grid-gap);
  align-items: start;
  padding: 68px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.callout > .eyebrow {
  grid-column: 1;
  grid-row: 1;
  padding-top: 4px;
}

.callout > :not(.eyebrow) {
  grid-column: 2;
}

.marketing-footer,
.site-footer {
  display: flex;
  min-height: 88px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}

/* Integration detail pages */
.marketing-hero .lede {
  margin: 0 0 24px;
}

.marketing-hero > .primary-button {
  width: fit-content;
  justify-self: start;
}

.marketing-grid,
.marketing-section {
  width: var(--content-width);
  margin-left: calc(var(--rail-width) + var(--grid-gap));
}

.marketing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  padding: 0 0 56px;
}

.marketing-card {
  padding: 22px 0 26px;
  border-top: 1px solid var(--line-strong);
}

.marketing-card h2 {
  font-size: 1.5rem;
}

.marketing-card ul {
  margin: 16px 0 0;
  padding-left: 20px;
}

.marketing-card li + li {
  margin-top: 7px;
}

.marketing-section {
  padding: 56px 0;
  border-top: 1px solid var(--line);
}

.marketing-section .steps {
  width: 100%;
  margin-left: 0;
}

.marketing-section h2,
.marketing-section > p:not(.eyebrow) {
  max-width: var(--content-width);
}

.marketing-section > p:not(.eyebrow) {
  color: #55574f;
}

.related-links {
  display: grid;
  gap: 0;
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.related-links a {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.86rem;
  text-decoration: none;
}

/* Editorial articles */
.article-page .marketing-main {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, var(--content-width)) 1fr;
  column-gap: var(--grid-gap);
}

.article-page .breadcrumb {
  grid-column: 1;
  grid-row: 1;
  align-self: start;
  margin: 112px 0 0;
}

.article-page .marketing-main > article {
  min-width: 0;
  grid-column: 2;
  grid-row: 1;
}

.breadcrumb {
  display: grid;
  gap: 2px;
  color: #55574f;
  font-size: 0.9rem;
  line-height: 1.5;
}

.breadcrumb a {
  width: fit-content;
  text-decoration: none;
}

.breadcrumb span[aria-hidden="true"] {
  display: none;
}

.breadcrumb span[aria-current="page"] {
  color: #55574f;
}

.article-hero {
  max-width: var(--content-width);
  padding: 108px 0 50px;
}

.article-date,
.article-read-time {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.article-read-time {
  margin: 0;
}

.article-hero h1 {
  margin-bottom: 16px;
  font-size: clamp(2.25rem, 3.2vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.article-lead {
  max-width: var(--content-width);
  margin: 0 0 24px;
  color: #292a25;
  font-size: 1rem;
  line-height: 1.5;
}

.article-meta {
  display: none;
}

.article-layout {
  display: block;
}

.article-content,
.article-body {
  width: 100%;
  max-width: var(--content-width);
  color: #292a25;
  font-size: 1rem;
  line-height: 1.5;
}

.article-content > section,
.article-body > section {
  scroll-margin-top: 24px;
}

.article-content h2,
.article-body h2 {
  margin-top: 54px;
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.article-content h3,
.article-body h3 {
  margin-top: 34px;
}

.article-content p,
.article-content li,
.article-body p,
.article-body li {
  color: #292a25;
}

.article-content p,
.article-body p {
  margin-bottom: 22px;
}

.article-content li + li,
.article-body li + li {
  margin-top: 6px;
}

.article-content .callout,
.article-body .callout {
  display: block;
  margin-top: 54px;
  padding: 24px 0;
}

.article-content .callout > .eyebrow,
.article-body .callout > .eyebrow {
  margin-bottom: 14px;
  padding: 0;
}

.article-content .callout h2,
.article-body .callout h2 {
  margin-top: 0;
}

.article-aside {
  position: static;
  padding: 18px 0;
  border: 0;
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
}

.article-toc {
  display: grid;
  gap: 3px;
  margin: 0 0 48px;
  padding: 16px;
  border: 1px solid #eaeae5;
  border-radius: 3px;
  background: var(--surface);
}

.article-toc strong {
  color: #686a63;
  font-size: 0.86rem;
  font-weight: 400;
}

.article-toc a {
  width: fit-content;
  font-size: 0.86rem;
  line-height: 1.55;
  text-decoration: none;
}

.article-toc ul,
.source-list {
  margin: 8px 0 0;
  padding-left: 19px;
}

.article-toc li + li,
.source-list li + li {
  margin-top: 3px;
}

.formula-block {
  overflow-x: auto;
  margin: 26px 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--paper);
  font-size: 0.94rem;
  line-height: 1.55;
}

.formula-block p:last-child {
  margin-bottom: 0;
}

.data-table-wrap,
.article-content table,
.article-body table {
  overflow-x: auto;
  width: 100%;
  margin: 28px 0;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--paper);
}

.data-table,
.article-content table,
.article-body table {
  width: 100%;
  min-width: 620px;
  border-spacing: 0;
  border-collapse: collapse;
}

.data-table th,
.data-table td,
.article-content th,
.article-content td,
.article-body th,
.article-body td {
  padding: 12px 13px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th,
.article-content th,
.article-body th {
  color: #3f413c;
  background: var(--surface);
  font-size: 0.76rem;
  font-weight: 600;
}

.data-table td,
.article-content td,
.article-body td {
  font-size: 0.84rem;
}

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

.note,
.note-warning {
  margin: 26px 0;
  padding: 16px 18px;
  border-left: 2px solid var(--blue);
  color: #41433e;
  background: #edf5ff;
}

.note-warning {
  border-left-color: var(--coral);
  background: #fff0ed;
}

.author-card {
  display: grid;
  gap: 4px;
  margin-top: 50px;
  padding: 20px 0;
  border: 0;
  border-top: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
}

.author-card p {
  margin: 0;
}

.source-note,
.verified-note {
  padding: 16px 18px;
  border-left: 2px solid var(--gold);
  color: #55574f;
  background: var(--gold-soft);
}

/* Shared form and result primitives */
.tool-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  align-items: stretch;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: transparent;
}

.tool-card {
  padding: 24px 0;
}

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

.field {
  display: grid;
  gap: 7px;
}

.field label {
  color: #4e504a;
  font-size: 0.82rem;
  font-weight: 600;
}

.field input,
.field select {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  color: var(--ink);
  background: #fff;
}

.field input:focus,
.field select:focus {
  border-color: var(--gold-ink);
  outline: 2px solid rgb(245 183 0 / 18%);
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.tool-actions button {
  cursor: pointer;
}

.result-panel {
  min-height: 0;
  padding: 24px;
  border-top: 2px solid var(--gold);
  color: var(--ink);
  background: var(--surface);
}

.result-panel [data-result-value] {
  display: block;
  margin: 8px 0 14px;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1;
}

.result-panel [data-result-detail] {
  color: #55574f;
}

.result-panel[data-state="empty"] [data-result-value] {
  color: #92948d;
}

.result-panel[data-state="error"] {
  color: #7c2519;
  background: #fff0ed;
}

.tool-share-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

.tool-share {
  min-height: 38px;
  cursor: pointer;
}

.tool-share-status,
.fine-print {
  color: var(--muted);
  font-size: 0.78rem;
}

@media (max-width: 1120px) {
  :root {
    --rail-width: 170px;
    --grid-gap: 54px;
  }
}

@media (max-width: 900px) {
  .hero,
  .marketing-hero,
  .section-heading,
  .callout,
  .article-page .marketing-main {
    display: block;
    max-width: var(--content-width);
    margin-inline: auto;
  }

  .hero > .eyebrow,
  .marketing-hero > .eyebrow,
  .section-heading > .eyebrow,
  .callout > .eyebrow {
    margin-bottom: 16px;
    padding-top: 0;
  }

  .feature-grid,
  .marketing-grid,
  .marketing-section,
  .steps {
    width: 100%;
    max-width: var(--content-width);
    margin-inline: auto;
  }

  .article-page .breadcrumb {
    margin-top: 72px;
  }

  .article-hero {
    padding-top: 30px;
  }
}

@media (max-width: 760px) {
  .nav-links {
    display: none;
  }

  .hero,
  .marketing-hero {
    padding: 72px 0 58px;
  }

  .section,
  .callout,
  .marketing-section {
    padding-block: 54px;
  }

  .formula {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .formula-operator {
    display: none;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .marketing-nav,
  .marketing-main,
  .marketing-footer,
  .site-header,
  body.marketing-page > main,
  .site-footer {
    width: min(var(--page-width), calc(100% - 28px));
  }

  .marketing-nav,
  .site-header {
    min-height: 52px;
  }

  .brand {
    font-size: 0.78rem;
  }

  .brand img {
    width: 21px;
    height: 21px;
  }

  .nav-cta {
    min-height: 32px;
    padding-inline: 0.72rem;
    font-size: 0.74rem;
  }

  h1,
  .article-hero h1,
  .hero h1,
  .marketing-hero h1 {
    font-size: clamp(2.05rem, 10vw, 2.35rem);
    line-height: 1.17;
  }

  .article-page .breadcrumb {
    margin-top: 52px;
  }

  .article-hero {
    padding-top: 26px;
  }

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

  .marketing-footer,
  .site-footer {
    min-height: 84px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}