:root {
  --bg: #000000;
  --bg-elevated: #141413;
  --bg-inverse: #f6f5f2;
  --fg: #f6f5f2;
  --fg-inverse: #161615;
  --fg-muted: #a8a59d;
  --fg-faint: #8a877f;
  --line: rgba(246, 245, 242, 0.12);
  --line-strong: rgba(246, 245, 242, 0.28);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;
  --space-10: 64px;
  --space-12: 96px;
  --space-16: 128px;
  --space-20: 160px;
  --container: 100%;
  --narrow: 680px;
  --wide: 100%;
  --gutter: 20px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-pill: 999px;
  --header-h: 56px;
  --shadow-menu: 0 8px 24px rgba(0, 0, 0, 0.4);
  --canvas-background: #000000;
  --construction-line: rgba(255, 255, 255, 0.1);
  --construction-line-subtle: rgba(255, 255, 255, 0.055);
  --construction-node-border: rgba(255, 255, 255, 0.14);
  --construction-node-fill: var(--bg-elevated);
  --ruler-tick: rgba(255, 255, 255, 0.09);
  --font: "SF Pro Text", "SF Pro Display", "SF Pro", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --display: 2.5rem;
  --h1: 2rem;
  --h2: 1.6rem;
  --body-large: 1.0625rem;
  --section: var(--space-10);
  --frame-inset: var(--space-3);
  --frame-main: max(var(--gutter), calc((100% - var(--container)) / 2));
  --frame-wide: max(var(--gutter), calc((100% - var(--wide)) / 2));
}

@media (min-width: 768px) {
  :root {
    --gutter: 32px;
    --header-h: 64px;
    --display: 3.5rem;
    --h1: 2.5rem;
    --h2: 1.85rem;
    --body-large: 1.175rem;
    --section: var(--space-12);
  }
}

@media (min-width: 1024px) {
  :root {
    --gutter: 40px;
    --display: 4.75rem;
    --h1: 3.25rem;
    --h2: 2.25rem;
    --body-large: 1.25rem;
    --section: var(--space-16);
  }
}

@media (min-width: 1513px) {
  body {
    width: 1512px;
    zoom: calc(100vw / 1512px);
  }
}


*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-padding-top: calc(var(--header-h) + var(--space-3));
}

body {
  margin: 0;
  overflow-x: clip;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-weight: 400;
}

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

a {
  color: inherit;
}

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

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

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: 0;
  transform: translateY(-120%);
  background: var(--bg-inverse);
  color: var(--fg-inverse);
  padding: var(--space-3) var(--space-4);
  z-index: 20;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}

.skip-link:focus {
  transform: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--header-h);
  background: transparent;
}

.site-header.is-solid {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.header-inner,
.footer-inner,
.wide,
.main {
  width: min(100% - (var(--gutter) * 2), var(--wide));
  margin-inline: auto;
}

.main {
  width: min(100% - (var(--gutter) * 2), var(--container));
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.wordmark {
  font-size: 1.0625rem;
  letter-spacing: -0.03em;
  text-decoration: none;
  font-weight: 500;
}

.desktop-nav {
  display: none;
  flex: 1;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a,
.nav-trigger {
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-decoration: none;
  background: none;
  border: 0;
  color: var(--fg);
  padding: var(--space-2) 0;
  cursor: pointer;
}

.nav-list a[aria-current="page"],
.nav-trigger[aria-current="page"],
.mobile-link[aria-current="page"],
.mobile-disclosure[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: var(--space-1);
}

.nav-dropdown {
  position: relative;
}

.nav-panel {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 240px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-menu);
  padding: var(--space-2);
  display: grid;
}

.nav-panel[hidden] {
  display: none;
}

.nav-panel a {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  text-decoration: none;
}

.nav-panel a:hover {
  background: var(--bg);
}

.nav-desc {
  color: var(--fg-muted);
  font-weight: 400;
  font-size: 0.9375rem;
  line-height: 1.5;
  letter-spacing: 0;
}

/* Shared navigation behavior and hover treatment. */
@media (min-width: 1024px) {
  .nav-list { gap: var(--space-1); }

  .nav-list > li > a,
  .nav-list > li > .nav-trigger {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 var(--space-3);
    border-radius: var(--radius-pill);
    white-space: nowrap;
    transition: background-color 160ms ease, color 160ms ease;
  }

  .nav-list > li > a:hover,
  .nav-list > li > .nav-trigger:hover,
  .nav-list > li > .nav-trigger[aria-expanded="true"] {
    background: var(--bg-elevated);
    color: var(--fg);
  }

  .nav-panel {
    top: calc(100% + var(--space-2));
    width: 300px;
    border-radius: var(--radius-md);
    padding: var(--space-3);
  }

  .nav-panel--mega {
    position: fixed;
    top: calc(var(--header-h) + var(--space-2));
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    width: min(calc(100vw - var(--gutter) * 2), 800px);
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-3);
    padding: var(--space-5);
    border-color: var(--line-strong);
  }

  .nav-panel-group { display: grid; align-content: start; gap: var(--space-1); }
  .nav-panel-group + .nav-panel-group { border-left: 1px solid var(--line); padding-left: var(--space-5); }
  .nav-panel-heading { margin: 0; padding: 0 var(--space-3) var(--space-2); font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; color: var(--fg-faint); }
  .nav-panel a { border-radius: var(--radius-md); transition: background-color 160ms ease, color 160ms ease; }
  .nav-panel a:hover, .nav-panel a:focus-visible { background: color-mix(in srgb, var(--fg) 8%, var(--bg-elevated)); }
  .nav-list > .nav-dropdown:last-child > .nav-panel { left: auto; right: 0; }
  .header-actions .button { border-radius: var(--radius-pill); transition: background-color 160ms ease, box-shadow 160ms ease; }
  .header-actions .button:hover { box-shadow: 0 0 0 1px var(--line-strong); }
}

.pill { transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease; }
.pill:hover:not(:disabled):not([aria-selected="true"]):not([aria-pressed="true"]) {
  background: var(--bg-elevated);
  border-color: var(--line-strong);
}
.pill[aria-selected="true"]:hover, .pill[aria-pressed="true"]:hover { filter: brightness(.9); }

@media (prefers-reduced-motion: reduce) {
  .nav-list > li > a, .nav-list > li > .nav-trigger, .nav-panel a, .header-actions .button, .pill { transition: none; }
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-actions .button {
  display: none;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}

.button-primary {
  background: var(--bg-inverse);
  color: var(--fg-inverse);
}

.button-primary:hover {
  background: color-mix(in srgb, var(--bg-inverse) 86%, var(--bg));
}

.button-quiet {
  background: transparent;
  color: var(--fg);
  border-color: var(--line);
}

.button-quiet:hover {
  border-color: var(--line-strong);
}

.button-on-inverse {
  background: var(--bg-inverse);
  color: var(--fg-inverse);
}

.button-on-inverse:hover {
  background: color-mix(in srgb, var(--fg-inverse) 86%, var(--fg));
}

.button-small {
  min-height: 36px;
  padding: 0 var(--space-3);
}

.button-arrow {
  margin-left: 0.3em;
  font-size: 0.95em;
  line-height: 1;
}

.button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.menu-button {
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  cursor: pointer;
  display: grid;
  place-items: center;
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--fg);
  position: relative;
}

.menu-icon::before,
.menu-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-icon::before {
  top: -6px;
}

.menu-icon::after {
  top: 6px;
}

.close-icon {
  width: 16px;
  height: 16px;
  position: relative;
}

.close-icon::before,
.close-icon::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  width: 1px;
  height: 16px;
  background: var(--fg);
}

.close-icon::before {
  transform: rotate(45deg);
}

.close-icon::after {
  transform: rotate(-45deg);
}

.mobile-panel {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 30;
  display: flex;
  flex-direction: column;
  padding: 0 var(--gutter) var(--space-6);
  overflow: auto;
}

.mobile-panel[hidden] {
  display: none;
}

.mobile-panel-bar {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-6);
  flex: 1;
}

.mobile-link,
.mobile-disclosure {
  font-family: var(--font);
  font-size: 1.35rem;
  line-height: 1.3;
  font-weight: 500;
  letter-spacing: -0.015em;
  text-align: left;
  background: none;
  border: 0;
  padding: var(--space-3) 0;
  text-decoration: none;
  color: var(--fg);
  cursor: pointer;
  border-bottom: 1px solid var(--line);
}

.mobile-sub {
  display: grid;
  padding-bottom: var(--space-3);
}

.mobile-sub[hidden] {
  display: none;
}

.mobile-sub a {
  display: grid;
  gap: var(--space-1);
  text-decoration: none;
  padding: var(--space-3) 0;
  font-size: 1.0625rem;
  line-height: 1.6;
}

.mobile-sub span {
  color: var(--fg-muted);
  font-size: 0.875rem;
}

.mobile-cta {
  width: 100%;
}

.hero {
  position: relative;
  padding: var(--space-10) 0;
}

.page-hero {
  padding: var(--space-10) 0 0;
}

.page-hero h1 {
  font-size: var(--h1);
  line-height: 1.05;
  font-weight: 400;
  letter-spacing: -0.028em;
}

.page-hero .lede,
.hero-inner .lede {
  max-width: var(--narrow);
}

.narrow {
  width: min(100% - (var(--gutter) * 2), var(--narrow));
  margin-inline: auto;
}

.reading {
  padding: var(--space-10) 0 var(--section);
}

.reading h1 {
  font-size: var(--h1);
  line-height: 1.05;
  font-weight: 400;
  letter-spacing: -0.028em;
}

.meta {
  margin: 0 0 var(--space-4);
  font-size: 0.75rem;
  line-height: 1.35;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.notice {
  margin: var(--space-8) 0 0;
  padding-top: var(--space-5);
  border-top: 1px solid var(--line);
  color: var(--fg);
}

.index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.index-list li {
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--line);
}

.index-list a {
  text-decoration: none;
}

.index-list h2,
.index-list h3 {
  font-size: 1.35rem;
  line-height: 1.3;
  font-weight: 500;
  letter-spacing: -0.015em;
}

.index-entry p {
  margin: var(--space-3) 0 0;
  color: var(--fg-muted);
  font-size: 0.9375rem;
}

.rule-link {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: baseline;
  padding: var(--space-5) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.rule-link span {
  color: var(--fg-muted);
  font-weight: 400;
}

.faq {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-trigger {
  width: 100%;
  min-height: 44px;
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4) 0;
  background: none;
  border: 0;
  color: var(--fg);
  font-family: var(--font);
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  line-height: inherit;
  text-align: left;
  cursor: pointer;
}

.faq-trigger::after {
  content: "+";
  font-weight: 400;
  color: var(--fg-muted);
}

.faq-trigger[aria-expanded="true"]::after {
  content: "–";
}

.faq-panel {
  padding: 0 0 var(--space-5);
  max-width: var(--narrow);
  color: var(--fg-muted);
}

.faq-panel p {
  margin: 0;
}

.form {
  display: grid;
  gap: var(--space-4);
  max-width: var(--narrow);
}

.field {
  display: grid;
  gap: var(--space-2);
}

.field label {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 44px;
  padding: var(--space-3);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--fg);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.5;
}

.field textarea {
  min-height: 160px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--fg);
  outline-offset: 2px;
  border-color: var(--fg);
}

.field-error,
.form-error {
  margin: 0;
  color: var(--fg);
  font-size: 0.9375rem;
}

.form-error {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--line);
}

.form-note {
  margin: var(--space-8) 0 0;
  max-width: var(--narrow);
  color: var(--fg-muted);
}

.stack-links {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.stack-links a {
  font-size: 0.875rem;
  font-weight: 500;
}

.hero-inner {
  width: min(100% - (var(--gutter) * 2), var(--container));
  margin-inline: auto;
  text-align: start;
}

h1 {
  margin: 0;
  font-size: var(--display);
  line-height: 0.98;
  font-weight: 400;
  letter-spacing: -0.03em;
}

h2 {
  margin: 0;
  font-size: var(--h2);
  line-height: 1.12;
  font-weight: 400;
  letter-spacing: -0.02em;
}

h3 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.3;
  font-weight: 500;
  letter-spacing: -0.015em;
}

.lede {
  margin: var(--space-4) 0 0;
  font-size: var(--body-large);
  line-height: 1.5;
  font-weight: 400;
  color: var(--fg);
}

.cta-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.cta-row .button {
  width: 100%;
}

.section {
  position: relative;
  padding: var(--section) 0;
}

.section-tight {
  padding-top: 0;
}

.section-header {
  max-width: min(var(--narrow), calc(var(--container) * 7 / 12));
  margin-bottom: var(--space-8);
}

.section-header-measure {
  max-width: var(--narrow);
}

.eyebrow {
  margin: 0 0 var(--space-3);
  font-size: 0.75rem;
  line-height: 1.35;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.product-frame {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 1px 0 rgba(246, 245, 242, 0.06);
  overflow: hidden;
}

.frame-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  min-height: 48px;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--line);
}

.frame-label {
  font-size: 0.75rem;
  line-height: 1.35;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--fg-muted);
  padding-inline: var(--space-2);
}

.toolbar-end {
  margin-left: auto;
  display: flex;
  gap: var(--space-2);
}

.pill-tabs {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.pill {
  min-height: 44px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--fg);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
}

.pill[aria-selected="true"] {
  background: var(--bg-inverse);
  color: var(--fg-inverse);
  border-color: var(--bg-inverse);
}

.pill-inverse {
  border-color: rgba(246, 245, 242, 0.2);
  color: var(--fg-inverse);
  background: transparent;
}

.pill-inverse[aria-selected="true"] {
  background: var(--fg-inverse);
  color: var(--fg);
  border-color: var(--fg-inverse);
}

.canvas {
  padding: var(--space-4);
  min-height: 0;
}

.canvas-stage {
  padding: var(--space-3);
  background: var(--bg);
}

.canvas-stage .study {
  width: 100%;
  height: auto;
}

.canvas svg {
  width: 100%;
  height: auto;
}

[hidden] {
  display: none !important;
}

.study-grid path,
.study-measures path {
  fill: none;
  stroke: rgba(246, 245, 242, 0.28);
  stroke-width: 1;
}

.study-outline path {
  fill: none;
  stroke: #f6f5f2;
  stroke-width: 1.4;
  stroke-linejoin: round;
}

.study-nodes circle {
  fill: none;
  stroke: #f6f5f2;
  stroke-width: 1;
}

.study-measures text {
  fill: #a8a59d;
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.ink {
  fill: none;
  stroke: #f6f5f2;
  stroke-width: 1.25;
}

.wire {
  fill: none;
  stroke: #f6f5f2;
  stroke-width: 1.25;
  stroke-dasharray: 3 3;
}

.demo-figure {
  margin: 0;
}

.demo-figure figcaption,
.code-note {
  margin: var(--space-3) 0 0;
  font-size: 0.75rem;
  line-height: 1.35;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
}

.feature {
  display: grid;
  gap: var(--space-8);
  align-items: center;
  margin-top: var(--space-8);
}

.section-header + .feature {
  margin-top: 0;
}

.feature-copy p:not(.eyebrow) {
  color: var(--fg);
  margin: var(--space-4) 0 0;
}

.text-link {
  display: inline-block;
  margin-top: var(--space-5);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--fg);
}

.text-link:hover {
  text-decoration-thickness: 1px;
}

.technical {
  display: grid;
  gap: var(--space-8);
  align-items: start;
}

.code-block {
  background: var(--bg-inverse);
  color: var(--fg-inverse);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.code-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border-bottom: 1px solid rgba(246, 245, 242, 0.12);
}

.code-example-label {
  color: rgba(246, 245, 242, 0.72);
}

.code-block pre {
  margin: 0;
  padding: var(--space-5);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.55;
  font-weight: 400;
}

.code-block code {
  font-family: inherit;
}

.usecase-grid {
  display: grid;
  gap: var(--space-5);
}

.usecase {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: transparent;
}

.usecase p {
  margin: var(--space-4) 0 0;
  color: var(--fg-muted);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.prose-measure {
  max-width: var(--narrow);
}

.prose-measure p {
  margin: 0 0 0.85em;
}

.writing-empty {
  margin: 0;
  padding-top: var(--space-5);
  border-top: 1px solid var(--line);
}

.writing-empty .text-link {
  margin-top: 0;
}

.section-contrast {
  --canvas-background: #000000;
  --construction-line: rgba(255, 255, 255, 0.1);
  --construction-line-subtle: rgba(255, 255, 255, 0.055);
  --construction-node-border: rgba(255, 255, 255, 0.14);
  --construction-node-fill: var(--bg-elevated);
  --ruler-tick: rgba(255, 255, 255, 0.09);
}

.construction-grid {
  --frame: max(var(--gutter), calc((100% - var(--container)) / 2));
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: visible;
  pointer-events: none;
}

.construction-grid.is-wide {
  --frame: max(var(--gutter), calc((100% - var(--wide)) / 2));
}

.construction-line {
  position: absolute;
  background: var(--construction-line);
  pointer-events: none;
}

.construction-line.is-minor {
  background: var(--construction-line-subtle);
}

.construction-line--vertical {
  top: 0;
  bottom: 0;
  width: 1px;
}

.construction-line--horizontal {
  left: 0;
  right: 0;
  height: 1px;
}

.construction-node {
  position: absolute;
  box-sizing: border-box;
  width: 10px;
  height: 10px;
  background: var(--construction-node-fill);
  border: 1px solid var(--construction-node-border);
  border-radius: 1px;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

/* Corner nodes on every framed container. */
.product,
.product-frame,
.usecase,
.plan-grid,
.main,
.wide,
.hero-inner {
  position: relative;
}

.product,
.product-frame,
.usecase,
.nav-panel,
.main,
.wide,
.hero-inner {
  padding: var(--frame-inset);
}

.plan-grid {
  padding: 0;
}

.study-board .product {
  position: relative;
  padding: 0;
}

.main::before,
.wide::before,
.hero-inner::before,
.product::after,
.product-frame::after,
.usecase::after,
.nav-panel::after,
.main::after,
.wide::after,
.hero-inner::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.main::before,
.wide::before,
.hero-inner::before {
  z-index: 2;
  inset: calc(var(--frame-inset) * -1);
  background:
    linear-gradient(var(--construction-line), var(--construction-line)) left 0 top 0 / 1px 100% no-repeat,
    linear-gradient(var(--construction-line), var(--construction-line)) right 0 top 0 / 1px 100% no-repeat,
    linear-gradient(var(--construction-line), var(--construction-line)) left 0 top 0 / 100% 1px no-repeat,
    linear-gradient(var(--construction-line), var(--construction-line)) left 0 bottom 0 / 100% 1px no-repeat;
}

.main::after,
.wide::after,
.hero-inner::after {
  inset: calc(var(--frame-inset) * -1 - 5px);
}

.product::after,
.product-frame::after,
.usecase::after,
.nav-panel::after {
  inset: -6px;
}

.product::after,
.product-frame::after,
.usecase::after,
.nav-panel::after,
.main::after,
.wide::after,
.hero-inner::after {
  z-index: 3;
  background:
    linear-gradient(var(--construction-node-fill), var(--construction-node-fill)) left 1px top 1px / 8px 8px no-repeat,
    linear-gradient(var(--construction-node-fill), var(--construction-node-fill)) right 1px top 1px / 8px 8px no-repeat,
    linear-gradient(var(--construction-node-fill), var(--construction-node-fill)) left 1px bottom 1px / 8px 8px no-repeat,
    linear-gradient(var(--construction-node-fill), var(--construction-node-fill)) right 1px bottom 1px / 8px 8px no-repeat,
    linear-gradient(var(--construction-node-border), var(--construction-node-border)) left top / 10px 10px no-repeat,
    linear-gradient(var(--construction-node-border), var(--construction-node-border)) right top / 10px 10px no-repeat,
    linear-gradient(var(--construction-node-border), var(--construction-node-border)) left bottom / 10px 10px no-repeat,
    linear-gradient(var(--construction-node-border), var(--construction-node-border)) right bottom / 10px 10px no-repeat;
}

.study-board .product::after,
.plan-grid::before,
.plan-grid::after {
  content: none;
}


.construction-ruler {
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 0;
  width: 28px;
  pointer-events: none;
  background-repeat: repeat-y;
  background-image:
    repeating-linear-gradient(
      to bottom,
      var(--ruler-tick) 0 1px,
      transparent 1px 110px
    ),
    repeating-linear-gradient(
      to bottom,
      var(--ruler-tick) 0 1px,
      transparent 1px 22px
    );
}

.construction-ruler--left {
  left: 0;
  background-size: 14px 110px, 7px 22px;
  background-position: left top, left top;
}

.construction-ruler--right {
  right: 0;
  background-size: 14px 110px, 7px 22px;
  background-position: right top, right top;
}

.construction-fine-grid {
  position: absolute;
  left: var(--frame);
  bottom: var(--section);
  width: 108px;
  height: 72px;
  pointer-events: none;
  opacity: 0.45;
  background-image:
    linear-gradient(to right, var(--construction-line-subtle) 1px, transparent 1px),
    linear-gradient(to bottom, var(--construction-line-subtle) 1px, transparent 1px);
  background-size: 12px 12px;
}

.z-content {
  position: relative;
  z-index: 1;
}

@media (max-width: 1023px) {
  .construction-line.is-minor,
  .construction-node.is-minor,
  .construction-fine-grid {
    display: none;
  }
}

@media (max-width: 767px) {
  .construction-ruler,
  .construction-line.is-optional,
  .construction-node.is-optional {
    display: none;
  }
}

.section-contrast {
  background: var(--bg-elevated);
  color: var(--fg);
}

.cta-band {
  max-width: var(--narrow);
}

.cta-band p {
  margin: var(--space-4) 0 var(--space-8);
  color: var(--fg-muted);
  font-size: var(--body-large);
  line-height: 1.5;
  font-weight: 400;
}

.site-footer {
  padding: var(--section) 0 var(--space-8);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  gap: var(--space-8);
}

.footer-brand p,
.site-footer a,
.site-footer li {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--fg-muted);
}

.footer-brand p {
  margin: var(--space-4) 0 0;
  max-width: 68ch;
}

.site-footer h2 {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: var(--space-4);
  color: var(--fg);
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.site-footer a {
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--fg);
}

.copyright {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  grid-column: 1 / -1;
  padding-top: var(--space-6);
  border-top: 1px solid var(--line);
}

@media (min-width: 768px) {
  .cta-row {
    flex-direction: row;
    justify-content: flex-start;
  }

  .cta-row .button {
    width: auto;
  }

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

  .usecase-grid .usecase:last-child {
    grid-column: auto;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }

  .hero {
    --pad-top: var(--space-12);
    --pad-bottom: var(--space-12);
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }

  .page-hero,
  .reading {
    padding-top: var(--space-12);
  }
}

@media (min-width: 1024px) {
  .header-actions .button {
    display: inline-flex;
  }

  .desktop-nav {
    display: block;
  }

  .menu-button {
    display: none;
  }

  .feature,
  .technical {
    grid-template-columns: minmax(0, calc(min(100%, var(--container)) * 5 / 12)) minmax(0, 1fr);
    gap: var(--space-6);
    padding-left: max(0px, calc((100% - min(100%, var(--container))) / 2));
  }

  .feature.visual-start {
    grid-template-columns: minmax(0, 1fr) minmax(0, calc(min(100%, var(--container)) * 5 / 12));
    padding-left: 0;
    padding-right: max(0px, calc((100% - min(100%, var(--container))) / 2));
  }

  .wide .section-header {
    margin-left: max(0px, calc((100% - min(100%, var(--container))) / 2));
  }

  .feature.visual-start .feature-copy {
    order: 2;
  }

  .usecase-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-6);
  }

  .usecase-grid .usecase:last-child {
    grid-column: auto;
  }

  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
  }

  .hero {
    --pad-top: var(--space-16);
    --pad-bottom: var(--space-20);
    padding-top: var(--space-16);
    padding-bottom: var(--space-20);
  }

  .page-hero,
  .reading {
    padding-top: var(--space-16);
  }
}

.plan-board {
  position: relative;
  padding: var(--space-10) 0 var(--section);
}

.plan-grid {
  --construction-node-fill: var(--bg-elevated);
  --split: 344px;
  position: relative;
  display: grid;
  border: 0;
  background: var(--bg-elevated);
}

.plan-grid .construction-grid {
  --frame: 0px;
}

.plan-grid .construction-line.is-col,
.plan-grid .construction-node.is-col,
.plan-grid .construction-line.is-split {
  display: none;
}

.plan-intro,
.plan-note,
.plan-cell {
  padding: var(--space-6) var(--space-5);
  border-bottom: 1px solid var(--line);
}

.plan-intro h1 {
  margin: 0;
  max-width: 16ch;
  font-size: var(--display);
  line-height: 0.95;
  font-weight: 400;
  letter-spacing: -0.035em;
}

.plan-intro h1 span {
  display: block;
  color: var(--fg-muted);
}

.plan-note h2 {
  margin: 0 0 var(--space-5);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.plan-note p {
  margin: 0 0 var(--space-4);
  max-width: 36em;
  color: var(--fg-muted);
  font-size: 0.9375rem;
}

.plan-note p:last-child {
  margin-bottom: 0;
}

.plan-note strong {
  color: var(--fg);
  font-weight: 500;
}

.plan-cell h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}

.plan-price {
  margin: var(--space-3) 0 var(--space-5);
  font-size: 1.75rem;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.plan-billing {
  display: flex;
  gap: var(--space-2);
  margin: 0 0 var(--space-5);
  padding: 0;
  border: 0;
}

.plan-billing label {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  cursor: pointer;
}

.plan-billing input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.plan-billing label:has(input:focus-visible) {
  outline: 2px solid var(--fg);
  outline-offset: 2px;
}

.plan-billing label:has(input:checked) {
  background: var(--bg-inverse);
  color: var(--fg-inverse);
  border-color: var(--bg-inverse);
}

.plan-tag {
  margin: 0 0 var(--space-6);
  color: var(--fg-muted);
  font-size: 0.9375rem;
}

.plan-cell ul {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
}

.plan-cell li {
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
}

.plan-cell a {
  text-decoration: none;
}

.plan-cell a:hover {
  text-decoration: underline;
}

@media (min-width: 900px) {
  .plan-grid .construction-line.is-col,
  .plan-grid .construction-node.is-col,
  .plan-grid .construction-line.is-split {
    display: block;
  }

  .plan-intro,
  .plan-note,
  .plan-cell {
    border-bottom: 0;
  }

  .plan-grid {
    grid-template-columns: 1.15fr 1fr 1fr;
  }

  .plan-intro {
    grid-column: 1 / 3;
    min-height: 280px;
    border-right: 0;
  }

  .plan-note {
    grid-column: 3;
    border-bottom: 0;
  }

  .plan-cell {
    border-bottom: 0;
    border-right: 0;
  }

  .plan-cell:last-child {
    border-right: 0;
  }

  .plan-grid .construction-line.is-minor,
  .plan-grid .construction-node.is-minor {
    display: none;
  }
}

@media (min-width: 1024px) {
  .plan-grid .construction-line.is-minor,
  .plan-grid .construction-node.is-minor {
    display: block;
  }
}

.plan-offers {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-4);
  padding: var(--space-4);
}

.offer {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: var(--space-4) var(--space-4) var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--fg);
}

.offer h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.offer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.offer-badge {
  margin: 0;
  padding: 0.2em 0.7em;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.offer-price {
  margin: var(--space-2) 0 var(--space-3);
  font-size: 1.75rem;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.offer-price span {
  margin-left: 0.15em;
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--fg-muted);
}

.offer-desc {
  margin: 0 0 var(--space-4);
  color: var(--fg-muted);
  font-size: 0.9375rem;
}

.offer ul {
  margin: 0 0 var(--space-4);
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
}

.offer li {
  position: relative;
  padding: 1px 0 1px 1.4em;
  line-height: 1.35;
}

.offer li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--fg-muted);
}

.offer .button {
  width: 100%;
  margin-top: auto;
  border-radius: var(--radius-pill);
}

.offer.is-featured {
  background: var(--bg-inverse);
  color: var(--fg-inverse);
  border-color: var(--bg-inverse);
}

.offer.is-featured .offer-price span,
.offer.is-featured .offer-desc,
.offer.is-featured li::before {
  color: color-mix(in srgb, var(--fg-inverse) 68%, transparent);
}

.offer.is-featured .offer-badge {
  border-color: color-mix(in srgb, var(--fg-inverse) 22%, transparent);
}

@media (min-width: 900px) {
  .plan-offers {
    grid-column: 1 / -1;
    grid-template-columns: repeat(4, 1fr);
    align-items: stretch;
  }
}

.section-contrast :focus-visible,
.skip-link:focus-visible,
.product-code :focus-visible {
  outline-color: var(--fg-inverse);
}

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