:root {
  --bg: #f6f4ef;
  --surface: #ffffff;
  --ink: #16161a;
  --muted: #5b5b66;
  --line: #e3e0d8;
  --accent: #e8572a;
  --accent-ink: #ffffff;
  --radius: 14px;
  --max: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --surface: #1a1a1d;
    --ink: #f2f0ea;
    --muted: #a2a2ac;
    --line: #2a2a2f;
    --accent: #ff6a3d;
    --accent-ink: #111113;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

a:focus-visible,
.button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  font-size: 18px;
}

.logo svg {
  width: 26px;
  height: 26px;
}

.nav {
  display: flex;
  gap: 28px;
  font-size: 15px;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
}

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

/* Hero */

.hero {
  padding: 112px 0 96px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 20px;
}

.hero h1 {
  font-size: clamp(40px, 7vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0 0 28px;
  max-width: 14ch;
}

.hero h1 span {
  color: var(--accent);
}

.lead {
  font-size: clamp(18px, 2vw, 21px);
  color: var(--muted);
  max-width: 44ch;
  margin: 0 0 40px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  border: 1px solid var(--ink);
}

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

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

.button.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Sections */

.section {
  padding: 96px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 48px;
}

.section h2 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0;
  max-width: 20ch;
}

.section-head p {
  color: var(--muted);
  margin: 0;
  max-width: 56ch;
}

/* Products */

.products {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.tag {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

.status {
  font-size: 13px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  white-space: nowrap;
}

.status::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 7px;
  vertical-align: 1px;
}

.card h3 {
  font-size: 26px;
  letter-spacing: -0.02em;
  margin: 0;
}

.card p {
  color: var(--muted);
  margin: 0;
}

.card ul {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
  font-size: 15px;
}

.card li::before {
  content: "→";
  color: var(--accent);
  margin-right: 8px;
}

/* Principles */

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.principle .num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.principle h3 {
  font-size: 21px;
  letter-spacing: -0.015em;
  margin: 10px 0 8px;
}

.principle p {
  color: var(--muted);
  margin: 0;
}

/* Custom work */

.split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: start;
}

.split p {
  color: var(--muted);
  margin: 0 0 16px;
}

/* Contact */

.contact {
  padding: 120px 0;
  border-top: 1px solid var(--line);
}

.contact .mail {
  display: inline-block;
  font-size: clamp(24px, 7vw, 72px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  text-decoration: none;
  border-bottom: 3px solid var(--accent);
  overflow-wrap: anywhere;
}

.contact .mail:hover {
  color: var(--accent);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0 56px;
  font-size: 14px;
  color: var(--muted);
}

.site-footer .container {
  display: grid;
  gap: 16px;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

.legal {
  max-width: 80ch;
  margin: 0;
}

/* Document pages */

.doc {
  padding: 80px 0 96px;
}

.doc .container {
  max-width: 760px;
}

.doc h1 {
  font-size: clamp(36px, 5vw, 56px);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 12px;
}

.doc h2 {
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 48px 0 12px;
}

.doc p,
.doc li {
  color: var(--muted);
}

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

/* Responsive */

@media (max-width: 860px) {
  .products,
  .principles,
  .split {
    grid-template-columns: 1fr;
  }

  .principles {
    gap: 32px;
  }
}

@media (max-width: 560px) {
  .container {
    padding: 0 16px;
  }

  .nav {
    gap: 18px;
  }

  .nav .optional {
    display: none;
  }

  .hero {
    padding: 72px 0 64px;
  }

  .section {
    padding: 72px 0;
  }

  .card {
    padding: 24px;
  }
}