:root {
  color-scheme: light;
  --bg: #f7f4ee;
  --surface: #fffdf9;
  --surface-soft: #f0eadf;
  --ink: #171511;
  --muted: #625b50;
  --line: #d8cebd;
  --focus: #4f46e5;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 10;
  transform: translateY(-160%);
  border-radius: 6px;
  background: var(--ink);
  color: #fff;
  padding: 8px 12px;
  text-decoration: none;
}

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

.wrap {
  width: min(1040px, calc(100vw - 40px));
  margin-inline: auto;
}

.narrow {
  max-width: 780px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 249, 0.94);
  backdrop-filter: blur(12px);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
}

.brand-mark {
  width: 48px;
  height: 32px;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  background: var(--ink);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-title,
.brand-subtitle {
  display: block;
}

.brand-title {
  font-weight: 800;
  line-height: 1.2;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.9rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

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

.site-nav a:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.section {
  padding-block: clamp(44px, 7vw, 88px);
}

.section-ruled {
  border-block: 1px solid var(--line);
  background: rgba(255, 253, 249, 0.56);
}

.hero {
  padding-block: clamp(72px, 12vw, 136px);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1,
h2 {
  max-width: 13ch;
  font-weight: 820;
  letter-spacing: 0;
  line-height: 1.04;
}

h1 {
  margin-bottom: 20px;
  font-size: clamp(2.4rem, 7vw, 5rem);
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(1.75rem, 4vw, 3rem);
}

h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.lead {
  max-width: 66ch;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 40px;
  align-items: start;
}

.copy-block {
  max-width: 68ch;
}

.plain-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.comparison,
.principles {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--line);
}

.comparison {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-block: 20px;
}

.comparison > div,
.principles > article,
.steps > li {
  background: var(--surface);
  padding: 18px;
}

.callout,
.quote {
  color: var(--ink);
  font-weight: 700;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--line);
}

.steps li {
  display: grid;
  align-content: start;
  gap: 8px;
  min-height: 150px;
}

.steps strong {
  font-size: 1.05rem;
  line-height: 1.25;
}

.steps span,
.principles p {
  color: var(--muted);
}

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

.section-final {
  border-top: 1px solid var(--line);
  background: var(--surface-soft);
}

.quote {
  max-width: 760px;
  font-size: clamp(1.35rem, 3vw, 2.4rem);
  line-height: 1.15;
}

@media (max-width: 840px) {
  .header-row,
  .split {
    display: grid;
    align-items: flex-start;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .split,
  .comparison,
  .steps,
  .principles {
    grid-template-columns: 1fr;
  }

  .steps li {
    min-height: auto;
  }
}

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