:root {
  color-scheme: dark;
  --black: #000;
  --white: #fff;
  --line: #2a2a2a;
  --muted: #a8a8a8;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--black);
  color: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

a { color: inherit; }

.site-header {
  min-height: 76px;
  padding: 0 4vw;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 2;
}

.brand {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-decoration: none;
}

nav { display: flex; gap: clamp(18px, 3vw, 44px); }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a:focus-visible { color: var(--white); }

.hero {
  min-height: calc(100vh - 76px);
  padding: clamp(60px, 8vw, 120px) 4vw;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .9fr);
  align-items: center;
  gap: 5vw;
  border-bottom: 1px solid var(--line);
}

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

h1 {
  margin-bottom: 16px;
  font-size: clamp(4.5rem, 12vw, 11rem);
  line-height: .82;
  letter-spacing: -.075em;
  font-weight: 900;
}

.hero-wordmark {
  width: min(100%, 760px);
  line-height: 0;
}

.hero-wordmark img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-line {
  margin-bottom: 40px;
  color: var(--muted);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
}

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

.button, .copy-button {
  min-height: 52px;
  border: 1px solid var(--white);
  border-radius: 0;
  padding: 14px 24px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease;
}

.button-light { background: var(--white); color: var(--black); }
.button-dark, .copy-button { background: var(--black); color: var(--white); }
.button:hover, .button:focus-visible, .copy-button:hover, .copy-button:focus-visible { background: #baff00; color: var(--black); }

.hero-mark { margin: 0; }
.hero-mark img { display: block; width: 100%; height: auto; }

.about, .buy, .links, footer {
  padding: clamp(72px, 10vw, 150px) 4vw;
  border-bottom: 1px solid var(--line);
}

.about {
  display: grid;
  grid-template-columns: minmax(180px, .6fr) minmax(0, 1.4fr);
  gap: 6vw;
}

h2 {
  margin-bottom: 24px;
  font-size: clamp(2.2rem, 5vw, 5rem);
  line-height: .95;
  letter-spacing: -.045em;
}

.about p {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(1.5rem, 3.2vw, 3.5rem);
  line-height: 1.12;
  letter-spacing: -.035em;
}

.contract {
  padding: 36px 4vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.contract h2 { margin-bottom: 6px; font-size: 1rem; letter-spacing: .12em; text-transform: uppercase; }
.contract p { margin-bottom: 0; color: var(--muted); overflow-wrap: anywhere; }

.buy ol {
  list-style: none;
  padding: 0;
  margin: 52px 0 0;
  border-top: 1px solid var(--line);
}

.buy li {
  min-height: 104px;
  display: grid;
  grid-template-columns: 90px 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.buy li span { color: var(--muted); }
.buy li p { margin: 0; font-size: clamp(1.2rem, 2.5vw, 2.25rem); }

.links { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; }
.links h2 { margin-bottom: 0; }
.links div { display: flex; flex-wrap: wrap; gap: 12px 32px; }
.links a { font-weight: 700; text-underline-offset: 6px; }

footer {
  padding-top: 38px;
  padding-bottom: 38px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: var(--muted);
}
footer span { color: var(--white); font-weight: 800; letter-spacing: .14em; }
footer p { margin: 0; }

@media (max-width: 760px) {
  .site-header { min-height: 64px; }
  nav { gap: 16px; }
  nav a:nth-child(2) { display: none; }
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-top: 64px;
    gap: 52px;
  }
  h1 { font-size: clamp(4.2rem, 25vw, 7rem); }
  .hero-wordmark { width: 100%; }
  .hero-mark { order: -1; width: min(82vw, 480px); margin-inline: auto; }
  .about { grid-template-columns: 1fr; }
  .about h2 { font-size: 1rem; letter-spacing: .12em; }
  .contract, .links, footer { align-items: flex-start; flex-direction: column; }
  .contract { padding-top: 30px; padding-bottom: 30px; }
  .copy-button { width: 100%; }
  .buy li { grid-template-columns: 56px 1fr; }
}

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