:root {
  --ink: #111210;
  --acid: #e9ff4f;
  --paper: #f4f3ed;
  --muted: #73746f;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(17, 18, 16, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 18, 16, 0.045) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--ink);
  font-family: "DM Mono", monospace;
}

body::after {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 72% 42%, rgba(233, 255, 79, 0.4), transparent 27%);
  content: "";
}

main {
  display: flex;
  min-height: 100vh;
  min-height: 100svh;
  flex-direction: column;
  padding: 28px 36px 24px;
}

header,
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mark {
  color: var(--ink);
  font-family: Inter, sans-serif;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.08em;
  text-decoration: none;
}

.mark span {
  margin-left: 7px;
  color: var(--muted);
  font-family: "DM Mono", monospace;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0;
  vertical-align: top;
}

.system {
  margin: 0;
  font-size: 10px;
  letter-spacing: 0.12em;
}

.system i {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 0 4px rgba(233, 255, 79, 0.25);
}

.hero {
  width: 100%;
  max-width: 1200px;
  margin: auto 0;
  padding: 8vh 0;
}

.eyebrow {
  margin: 0 0 24px 5px;
  font-size: 11px;
  letter-spacing: 0.2em;
}

h1 {
  margin: 0;
  font-family: Inter, sans-serif;
  font-size: clamp(72px, 16.2vw, 244px);
  font-weight: 900;
  letter-spacing: -0.085em;
  line-height: 0.73;
}

h1 span {
  color: var(--acid);
  text-shadow: 2px 2px 0 var(--ink);
}

.rule {
  width: min(100%, 760px);
  height: 5px;
  margin: clamp(38px, 6vw, 72px) 0 20px 5px;
  background: var(--ink);
}

.subhead {
  margin: 0 0 0 5px;
  color: var(--muted);
  font-size: clamp(11px, 1.3vw, 15px);
  letter-spacing: 0.08em;
}

footer {
  padding-top: 16px;
  border-top: 1px solid rgba(17, 18, 16, 0.22);
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.1em;
}

footer p {
  margin: 0;
}

footer strong {
  color: var(--ink);
  font-weight: 500;
}

@media (max-width: 640px) {
  main {
    padding: 22px 20px 18px;
  }

  .hero {
    padding: 10vh 0;
  }

  h1 {
    font-size: clamp(64px, 24vw, 110px);
    line-height: 0.78;
  }

  .rule {
    height: 4px;
  }

  footer p:nth-child(2) {
    display: none;
  }
}