:root {
  --paper: oklch(98.2% 0.004 95);
  --paper-2: oklch(95.8% 0.006 95);
  --ink: oklch(22% 0.012 250);
  --ink-2: oklch(38% 0.014 250);
  --mute: oklch(58% 0.014 250);
  --hair: oklch(86% 0.008 250);
  --teal: oklch(52% 0.08 220);
  --amber: oklch(72% 0.11 75);
  --terra: oklch(58% 0.12 32);
  --green: oklch(54% 0.09 145);
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 16px clamp(18px, 4vw, 56px);
  background: color-mix(in oklab, var(--paper) 86%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--hair) 72%, transparent);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: 0.01em;
}

nav {
  display: flex;
  gap: 18px;
  margin-left: auto;
  color: var(--ink-2);
  font-size: 13px;
}

nav a {
  text-decoration: none;
}

nav a:hover {
  color: var(--ink);
}

.hero {
  min-height: 92vh;
  display: grid;
  align-items: center;
  padding: 96px clamp(22px, 5vw, 72px) 48px;
  background:
    linear-gradient(90deg, oklch(98.2% 0.004 95 / 0.98), oklch(98.2% 0.004 95 / 0.86) 54%, oklch(98.2% 0.004 95 / 0.54)),
    linear-gradient(var(--hair) 1px, transparent 1px),
    linear-gradient(90deg, var(--hair) 1px, transparent 1px);
  background-size: auto, 44px 44px, 44px 44px;
}

.hero-copy {
  width: min(760px, 100%);
}

.eyebrow {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--mute);
}

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

h1 {
  font-size: clamp(72px, 15vw, 186px);
  line-height: 0.88;
  letter-spacing: 0;
  font-weight: 760;
}

h2 {
  max-width: 780px;
  font-size: clamp(34px, 5vw, 68px);
  line-height: 1.02;
  letter-spacing: 0;
  font-weight: 700;
}

h3 {
  font-size: 20px;
  font-weight: 680;
}

.lede {
  max-width: 680px;
  margin-top: 28px;
  color: var(--ink-2);
  font-size: clamp(20px, 2.5vw, 28px);
  line-height: 1.28;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid var(--hair);
  text-decoration: none;
  font-weight: 650;
}

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

.button.secondary {
  background: color-mix(in oklab, var(--paper) 78%, transparent);
}

.band {
  padding: clamp(64px, 10vw, 132px) clamp(22px, 5vw, 72px);
  border-top: 1px solid var(--hair);
}

.band.quiet {
  background: var(--paper-2);
}

.section-head {
  display: grid;
  gap: 12px;
  margin-bottom: 34px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 480px);
  gap: clamp(24px, 6vw, 82px);
  align-items: start;
}

.split p,
.principles p {
  max-width: 720px;
  color: var(--ink-2);
  font-size: 20px;
}

.checks {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.checks li {
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-2);
  border-top: 1px solid var(--hair);
}

.checks li::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--teal);
  flex: none;
}

.checks li:nth-child(2)::before {
  background: var(--green);
}

.checks li:nth-child(3)::before {
  background: var(--amber);
}

.checks li:nth-child(4)::before {
  background: var(--terra);
}

.tiles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.tiles article {
  min-height: 210px;
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 22px;
  border: 1px solid var(--hair);
  border-radius: 8px;
  background: var(--paper);
}

.tiles p {
  color: var(--ink-2);
}

.number {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mute);
}

.principles {
  display: grid;
  gap: 18px;
}

.principles strong {
  color: var(--ink);
}

footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  padding: 24px clamp(22px, 5vw, 72px);
  border-top: 1px solid var(--hair);
  color: var(--mute);
  font-size: 13px;
}

@media (max-width: 840px) {
  nav {
    display: none;
  }

  .hero {
    min-height: 86vh;
    background-position: 58% center;
  }

  .split,
  .tiles {
    grid-template-columns: 1fr;
  }
}