:root {
  color-scheme: light;
  --paper: #f7f6ef;
  --ink: #28483c;
  --muted: #5b6b60;
  --line: #dedfd4;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100svh;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 clamp(24px, 6vw, 88px);
}

::selection {
  color: var(--ink);
  background: #ffe58a;
}

a {
  color: inherit;
}

a:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 6px;
}

.site-header,
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.brand img {
  display: block;
  width: 164px;
  height: auto;
}

.domain,
.illustration-caption {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  letter-spacing: 0.06em;
}

main {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  align-items: center;
  gap: clamp(32px, 5vw, 80px);
  flex: 1;
  padding: 88px 0 104px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 28px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
}

h1 {
  margin: 0;
  font-size: clamp(36px, 4.4vw, 64px);
  font-weight: 750;
  line-height: 1.35;
  letter-spacing: -0.035em;
}

h1 span {
  text-decoration: underline;
  text-decoration-color: #f5c518;
  text-decoration-thickness: 0.11em;
  text-underline-offset: 0.14em;
}

.description {
  margin: 28px 0 32px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.95;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-height: 48px;
  padding: 12px 20px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition:
    color 140ms ease,
    background-color 140ms ease;
}

.channel-link:hover,
.channel-link:active {
  color: var(--paper);
  background: var(--ink);
}

.illustration {
  display: grid;
  justify-items: center;
  gap: 24px;
}

.mark-frame {
  display: grid;
  place-items: center;
  width: min(100%, 370px);
  aspect-ratio: 1;
  border: 1px solid var(--line);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 32px 32px;
}

.voxel-mark {
  display: block;
  width: 82%;
  height: auto;
}

.illustration-caption {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-align: center;
}

footer {
  padding: 24px 0 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

@media (max-width: 760px) {
  .site-header {
    padding: 20px 0;
  }

  .brand img {
    width: 140px;
  }

  main {
    grid-template-columns: 1fr;
    gap: 52px;
    padding: 52px 0;
  }

  .eyebrow {
    margin-bottom: 20px;
  }

  .description {
    font-size: 15px;
  }

  .desktop-break {
    display: none;
  }

  .illustration {
    gap: 16px;
  }

  .mark-frame {
    width: min(100%, 250px);
    background-size: 25px 25px;
  }

  footer {
    flex-wrap: wrap;
    gap: 4px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .channel-link {
    transition: none;
  }
}