* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
img { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--link); text-underline-offset: .25em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
::selection { background: var(--accent); color: var(--on-accent); }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
h1 { font-size: var(--text-display); line-height: 1.05; font-weight: 750; letter-spacing: -.045em; }
h2 { font-size: var(--text-h2); line-height: 1.12; font-weight: 750; letter-spacing: -.035em; }
h3 { font-size: var(--text-h3); line-height: 1.2; font-weight: 700; letter-spacing: -.025em; }
p { max-width: 65ch; }
.container { width: min(100% - var(--page-gutter) * 2, var(--content-width)); margin-inline: auto; }
.section { padding-block: var(--section-space); border-top: 1px solid var(--line); }
.section-head { margin-bottom: var(--space-12); }
.section-head h2 { margin-top: var(--space-4); max-width: 18em; }
.eyebrow, .tagline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 650;
  color: var(--text-muted);
}
.eyebrow {
  font-size: var(--text-xs);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.tagline { font-size: var(--text-sm); letter-spacing: 0; text-transform: none; }
.eyebrow::before, .tagline::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--secondary);
  flex-shrink: 0;
}
.lead { font-size: var(--text-lead); line-height: 1.5; color: var(--text-muted); }
.muted { color: var(--text-muted); }
.small { font-size: var(--text-sm); }
.stack > * + * { margin-top: var(--space-6); }
.skip-link {
  position: absolute;
  top: -6rem;
  left: 1rem;
  padding: .75rem 1rem;
  background: var(--page);
  z-index: 20;
}
.skip-link:focus { top: 1rem; }

.site-header { border-bottom: 1px solid var(--line); background: var(--page); position: relative; z-index: 5; }
.header-inner, .footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-6);
}
.header-inner { padding-block: var(--space-6); }
.brand { display: inline-block; width: clamp(12rem, 22vw, 17rem); max-width: 100%; flex-shrink: 0; }
.brand img { width: 100%; height: auto; }
.brand-light { display: var(--logo-light-display); }
.brand-dark { display: var(--logo-dark-display); }
.nav-state {
  position: absolute;
  width: 1px;
  height: 1px;
  min-height: 0;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  background: transparent;
}
.nav-state:focus-visible + .nav-toggle { outline: 3px solid var(--focus); outline-offset: 4px; }
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 48px;
  padding: 0 1rem;
  border: 1px solid var(--control-border);
  border-radius: var(--radius-control);
  font-weight: 700;
  cursor: pointer;
}
.nav-close { display: none; }
.nav-state:checked + .nav-toggle .nav-open { display: none; }
.nav-state:checked + .nav-toggle .nav-close { display: inline; }
.nav-links { display: flex; align-items: center; gap: var(--space-6); margin-left: auto; }
.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 650;
  font-size: var(--text-sm);
  line-height: 1.4;
  padding-block: .35rem;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] { text-decoration: underline; text-underline-offset: .35em; }
.nav-links a[aria-current="page"] { text-decoration-thickness: 2px; }
.follow { margin-top: var(--space-6); }
.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;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: var(--space-16);
  align-items: center;
  padding-block: var(--section-space);
}
.hero h1 { max-width: 12em; }
.hero .lead { max-width: 42ch; }
.hero-photo {
  position: relative;
  margin: 0;
  border-left: 2px solid var(--secondary);
  aspect-ratio: 5 / 4;
  background: var(--surface);
}
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% 82%;
}
.note-number {
  position: absolute;
  top: 0;
  right: 0;
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 750;
  letter-spacing: .04em;
  background: var(--accent);
  color: var(--on-accent);
  padding: .5rem .75rem;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: .75rem;
  min-height: 48px;
  padding: .875rem 1.5rem;
  background: var(--accent);
  color: var(--on-accent);
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  text-decoration: none;
  font-size: var(--text-base);
  font-weight: 700;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-standard);
}
.button:hover { background: var(--accent-hover); text-decoration: none; color: var(--on-accent); }
.button-secondary { background: transparent; border-color: var(--control-border); color: var(--text); }
.button-secondary:hover { background: var(--surface-raised); color: var(--text); }
.actions { display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: center; }

.tools-label {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: 0 0 var(--space-8);
  font-size: var(--text-xs);
  font-weight: 650;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.tools-label::after { content: ""; height: 1px; background: var(--line); flex: 1; }
.tools {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6) var(--space-8);
  padding: 0;
  margin: 0;
}
.tool { display: flex; align-items: center; gap: var(--space-3); min-width: min(100%, 11rem); }
.tool-mark {
  display: grid;
  place-items: center;
  width: 4.25rem;
  height: 4.25rem;
  flex-shrink: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
}
.tool-mark img { width: 2.5rem; height: 2.5rem; }
.tool-name { font-weight: 700; font-size: 1.2rem; line-height: 1.3; }
.shapes {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6) var(--space-8);
  list-style: none;
  padding: 0;
  margin: var(--space-8) 0 0;
}
.shapes li {
  min-width: 9rem;
  border-top: 2px solid var(--secondary);
  padding-top: var(--space-3);
  font-weight: 700;
}

.split { display: grid; grid-template-columns: 1.15fr .85fr; gap: var(--space-12); }
.split > :nth-child(2) { border-left: 1px solid var(--line); padding-left: var(--space-12); }
.solution { display: grid; grid-template-columns: 2.75rem 1fr; gap: var(--space-6); }
.solution .number {
  color: var(--accent-label);
  font-weight: 750;
  border-top: 2px solid var(--accent);
  padding-top: .5rem;
}
.solution p { color: var(--text-muted); margin-top: var(--space-4); }
.closer { margin-top: var(--space-12); }

.process {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-10, 2.5rem) var(--space-8);
}
.process li {
  grid-column: span 2;
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  border-top: 1px solid var(--line);
  padding-top: var(--space-6);
}
.process li:nth-child(n+4) { grid-column: span 3; }
.process .number {
  color: var(--accent-label);
  font-size: 1.75rem;
  line-height: 1.1;
  font-weight: 700;
  flex-shrink: 0;
}
.process h3 { font-size: 1.125rem; line-height: 1.35; letter-spacing: -.015em; }
.process p { color: var(--text-muted); margin-top: var(--space-2); }

.page-intro {
  padding-top: var(--section-space);
  padding-bottom: calc(var(--section-space) / 2);
}
.page-intro > * + * { margin-top: var(--space-6); }
.page-intro + .section { padding-top: calc(var(--section-space) / 2); }
.page-intro h1 { max-width: 16em; }
.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .5rem;
  align-items: center;
  margin: 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
}
.crumbs a { color: inherit; }
.byline { margin: 0; font-size: var(--text-sm); color: var(--text-muted); }
.stack.prose > h2 { margin-top: var(--space-12); }
.prose ul,
.prose ol { max-width: 65ch; margin: 0; padding-left: 1.25rem; }
.prose li + li { margin-top: var(--space-3); }
.note-list { list-style: none; padding: 0; margin: 0; }
.note-list > li { padding-block: var(--space-8); border-top: 1px solid var(--line); }
.note-list h2 { font-size: var(--text-h3); }
.note-list h2 a { color: var(--text); text-decoration: none; }
.note-list h2 a:hover { text-decoration: underline; }
.note-list p { margin-top: var(--space-3); color: var(--text-muted); }

.entries { list-style: none; padding: 0; margin: var(--space-8) 0 0; counter-reset: entry; }
.entries > li {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: var(--space-4);
  padding-block: var(--space-8);
  border-top: 1px solid var(--line);
}
.entries > li::before {
  counter-increment: entry;
  content: counter(entry, decimal-leading-zero);
  color: var(--accent-label);
  font-weight: 750;
  border-top: 2px solid var(--accent);
  padding-top: .5rem;
}
.entries h3 { font-size: 1.35rem; }
.entries p { margin-top: var(--space-3); color: var(--text-muted); }
.entries .for { color: var(--text); font-weight: 650; }

.points { list-style: none; padding: 0; margin: var(--space-8) 0 0; }
.points li { padding-block: var(--space-6); border-top: 1px solid var(--line); }
.points h3 { font-size: 1.25rem; }
.points p { margin-top: var(--space-3); color: var(--text-muted); }
.spec-table { width: 100%; border-collapse: collapse; margin-top: var(--space-8); }
.spec-table th, .spec-table td {
  text-align: left;
  vertical-align: top;
  padding: .85rem 0;
  border-bottom: 1px solid var(--line);
}
.spec-table th { width: 11rem; padding-right: var(--space-6); font-weight: 650; }

.field { display: grid; gap: var(--space-2); }
.field label { font-weight: 650; }
.form { display: grid; gap: var(--space-6); max-width: 36rem; }
.form .button { justify-self: start; }
input, textarea, select {
  min-height: 44px;
  border: 1px solid var(--control-border);
  border-radius: var(--radius-control);
  padding: .625rem .875rem;
  background: var(--surface);
  color: var(--text);
  max-width: 100%;
}
textarea { min-height: 8rem; resize: vertical; width: 100%; }
input { width: 100%; }
[aria-invalid="true"] { border-width: 2px; border-color: var(--text); }
.theme-control { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-3); font-size: var(--text-sm); }
.theme-control select { width: auto; min-width: 8rem; }

.site-footer { padding-block: var(--space-12); border-top: 1px solid var(--line); }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-6); }
.footer-meta { margin: 0; }
.footer-meta a { overflow-wrap: anywhere; }

@media (min-width: 64rem) {
  .nav-state { display: none; }
}

@media (max-width: 56rem) {
  .process { grid-template-columns: 1fr; }
  .process li, .process li:nth-child(n+4) { grid-column: auto; }
}

@media (max-width: 63.99rem) {
  .hero { grid-template-columns: 1fr; gap: var(--space-12); }
  .hero h1 { max-width: 12em; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .nav-links { display: none; margin-left: 0; flex-basis: 100%; }
  .nav-state:checked ~ .nav-links {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding-top: var(--space-2);
  }
  .nav-links a { padding: .7rem 0; }
}

@media (max-width: 23.99rem) {
  .brand { width: clamp(8.75rem, 54%, 12rem); }
}

@media (max-width: 47.99rem) {
  .split { grid-template-columns: 1fr; gap: var(--space-8); }
  .split > :nth-child(2) { padding-left: 0; padding-top: var(--space-8); border-left: 0; border-top: 1px solid var(--line); }
  .process { grid-template-columns: 1fr; }
  .process li, .process li:nth-child(n+4) { grid-column: auto; }
  .section-head { margin-bottom: var(--space-8); }
  .solution { gap: var(--space-4); }
  .spec-table th, .spec-table td { display: block; width: auto; }
  .spec-table th { padding-bottom: 0; border-bottom: 0; }
  .spec-table td { padding-top: .15rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}