.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  height: var(--topbar-h);
  pointer-events: none;
}

.topbar::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, var(--bg) 0%, rgba(6, 8, 11, 0.82) 38%, rgba(6, 8, 11, 0) 100%);
  transition: opacity 0.6s ease;
}

.topbar-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--wrap), 100% - 2 * var(--gutter));
  height: 100%;
  margin-inline: auto;
  padding-bottom: 14px;
}

.topbar-inner > * {
  pointer-events: auto;
}

.mode-toggle {
  margin-left: auto;
}

main {
  position: relative;
  z-index: 1;
  overflow-x: clip;
}

/* invisible on the plain background, it only carves space when a star drifts behind a glyph */
main,
.site-footer {
  text-shadow: 0 0 3px var(--bg), 0 0 10px var(--bg);
}

.hero {
  position: relative;
  /* its own stacking context, so the orbit sits above this box but under the hero text */
  z-index: 0;
  display: flex;
  align-items: flex-end;
  width: min(var(--wrap), 100% - 2 * var(--gutter));
  min-height: 100vh;
  min-height: 100svh;
  margin-inline: auto;
  padding-block: var(--topbar-h) clamp(4.5rem, 13vh, 8.5rem);
}

.hero-inner {
  max-width: 44rem;
}

/* boxes hug their text so the satellite can be reached wherever no words cover it */
.hero-inner > * {
  width: fit-content;
  max-width: 100%;
}

.hero-kicker {
  font: 400 var(--mono-m) / 1.4 var(--font-mono);
  color: var(--muted);
  letter-spacing: 0.01em;
}

.hero-name {
  margin-top: 1.1rem;
  font-size: var(--name);
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: -0.035em;
}

.hero-lede {
  margin-top: 1.6rem;
  max-width: 40ch;
  font-size: var(--step-1);
  font-weight: 300;
  line-height: 1.5;
  color: var(--text);
  text-wrap: balance;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.6rem;
  margin-top: 2.2rem;
  font-size: var(--mono-m);
}

.linktree {
  display: none;
}

/* the narrow view's calm 2d sky, behind everything; it only exists on narrow screens */
.sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.sky.is-on {
  opacity: 1;
}

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

[data-intro] {
  animation: intro-up 0.9s var(--ease-out) both;
  animation-delay: calc(var(--i, 0) * 90ms + 80ms);
}

@keyframes intro-up {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
}

.section {
  display: grid;
  grid-template-columns: minmax(9rem, 13rem) minmax(0, 1fr);
  column-gap: clamp(2rem, 5vw, 4.5rem);
  width: min(var(--wrap), 100% - 2 * var(--gutter));
  margin-inline: auto;
  padding-block: var(--section-pad);
  border-top: 1px solid var(--line);
}

.rail {
  align-self: start;
  position: sticky;
  top: calc(var(--topbar-h) + 1rem);
  /* where a number key lands the label: its pinned place, clear of the top bar and any safe area */
  scroll-margin-top: calc(var(--topbar-h) + 1rem + env(safe-area-inset-top, 0px));
  padding-top: 0.3rem;
  font: 400 var(--mono-m) / 1.4 var(--font-mono);
  color: var(--muted);
}

.rail-n {
  color: var(--text);
}

.section-body {
  min-width: 0;
}

.prose {
  max-width: var(--measure);
}

.prose p + p {
  margin-top: 1.2em;
}

.prose p {
  color: var(--text);
  font-weight: 300;
  font-size: var(--step-1);
  line-height: 1.65;
}

.sub {
  font-size: var(--step-0);
  font-weight: 600;
  letter-spacing: -0.005em;
  margin-bottom: 1rem;
}

.sub ~ .sub {
  margin-top: 3.5rem;
}

.site-footer {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.75rem;
  width: min(var(--wrap), 100% - 2 * var(--gutter));
  margin-inline: auto;
  padding-block: 4.5rem 3.5rem;
  border-top: 1px solid var(--line);
}

.stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  /* exactly " · " in the mono font */
  column-gap: 3ch;
  font: 400 var(--mono-s) / 1.5 var(--font-mono);
  color: var(--muted);
  text-align: center;
}

.stats-data {
  position: relative;
}

/* the dot sits in the gap, so it never decides where the line wraps */
.stats-dot {
  position: absolute;
  right: 100%;
  width: 3ch;
  opacity: 0.6;
}

.stats.is-wrapped .stats-dot {
  display: none;
}

@media (max-width: 880px) {
  .section {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 1.75rem;
  }

  .rail {
    position: static;
  }
}

@media (max-width: 720px), (max-height: 500px) and (pointer: coarse) and (orientation: landscape) {
  .topbar,
  .section,
  .site-footer,
  .hero-lede,
  .hero-links {
    display: none;
  }

  .hero {
    align-items: center;
    justify-content: center;
    padding-block: 3.5rem;
  }

  .hero-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 26rem;
    text-align: center;
  }

  .hero-name {
    order: 0;
    margin-top: 0;
    font-size: clamp(2.25rem, 10vw, 2.75rem);
  }

  .hero-kicker {
    order: 1;
    margin-top: 0.9rem;
    font-size: var(--mono-s);
  }

  .linktree {
    order: 2;
    display: block;
    width: 100%;
    margin-top: 2.5rem;
  }

  /* the name and line paint at once so the first contentful paint is real; only the links stagger in */
  .hero-name,
  .hero-kicker {
    animation: none;
  }

  .linktree [style*='--i'] {
    animation: intro-up 0.7s var(--ease-out) both;
    animation-delay: calc((var(--i) - 2) * 55ms + 60ms);
  }
}

@media (prefers-reduced-motion: reduce) {
  [data-intro],
  .linktree [style*='--i'] {
    animation: none;
  }
}