.shell {
  width: min(var(--shell), 100% - var(--gut) * 2);
  margin-inline: auto;
}

/* ---------- header ---------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s;
}

.masthead.is-stuck {
  background: rgba(4, 6, 11, .82);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--line);
}

.masthead__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-right: auto;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.03em;
}

/* One flex item, or the gap above would split the wordmark into "dec 0 ded". */
.brand__word {
  display: inline-block;
  white-space: nowrap;
}

.brand__word i {
  color: var(--blue-hi);
  font-style: normal;
}

.brand__tag {
  display: none;
  padding-left: 12px;
  margin-left: 2px;
  border-left: 1px solid var(--line-strong);
  color: var(--ink-3);
  font: 500 10px/1.4 var(--font-mono);
  font-style: normal;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  gap: 4px;
}

.nav a {
  padding: 8px 12px;
  color: var(--ink-2);
  font: 500 12.5px/1 var(--font-mono);
  letter-spacing: .01em;
  border: 1px solid transparent;
  transition: color .2s, border-color .2s, background .2s;
}

.nav a:hover,
.nav a.is-active {
  color: var(--ink);
  border-color: var(--line);
  background: var(--bg-raise);
}

.masthead__side {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-link {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  color: var(--ink-2);
  transition: .2s var(--ease);
}

.icon-link:hover {
  color: var(--blue-hi);
  border-color: var(--line-strong);
  transform: translateY(-1px);
}

.icon-link svg { width: 16px; height: 16px; }

.xlink {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  width: auto;
  padding: 0 13px;
}

.xlink__handle {
  font: 500 12.5px/1 var(--font-mono);
  letter-spacing: .01em;
}

@media (max-width: 1180px) {
  .xlink__handle { display: none; }
  .xlink { width: 36px; padding: 0; }
}

.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  color: var(--ink);
}

.nav-toggle i {
  display: block;
  width: 15px;
  height: 1.5px;
  margin: 3px auto;
  background: currentColor;
  transition: .25s var(--ease);
}

/* ---------- section rhythm ---------- */

.band {
  position: relative;
  padding: clamp(64px, 9vw, 122px) 0;
}

.band + .band { border-top: 1px solid var(--line-soft); }

.band--inset { background: linear-gradient(180deg, rgba(9, 13, 22, .7), rgba(4, 6, 11, 0)); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 20px;
  color: var(--blue-hi);
  font: 500 var(--step--1) / 1 var(--font-mono);
  letter-spacing: .16em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue));
}

.band__head {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: clamp(20px, 4vw, 56px);
  align-items: end;
  margin-bottom: clamp(32px, 4vw, 56px);
}

.band__head p {
  color: var(--ink-2);
  font-size: var(--step-0);
  max-width: 52ch;
}

.lede {
  color: var(--ink-2);
  font-size: var(--step-1);
  line-height: 1.62;
  max-width: 64ch;
}

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(4, 6, 11, 0), rgba(9, 13, 22, .85));
  padding: 56px 0 34px;
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 1fr));
  gap: 40px;
}

.footer__grid h4 {
  margin-bottom: 14px;
  font: 500 10px/1 var(--font-mono);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-4);
}

.footer__links {
  display: grid;
  gap: 9px;
  font-size: 13.5px;
  color: var(--ink-2);
}

.footer__links a { transition: color .2s; }
.footer__links a:hover { color: var(--blue-hi); }

.footer__note {
  max-width: 44ch;
  color: var(--ink-3);
  font-size: 13px;
  line-height: 1.7;
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  justify-content: space-between;
  margin-top: 46px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  color: var(--ink-4);
  font: 400 11.5px/1.5 var(--font-mono);
}

/* ---------- reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }
.reveal[data-delay="4"] { transition-delay: .32s; }

@media (max-width: 1080px) {
  .brand__tag { display: none; }
  .nav {
    position: fixed;
    inset: 74px 0 auto;
    display: grid;
    gap: 2px;
    padding: 14px var(--gut) 22px;
    background: rgba(4, 6, 11, .97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: .25s var(--ease);
  }
  .nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }
  .nav a {
    padding: 13px 12px;
    font-size: 14px;
    border-bottom: 1px solid var(--line-soft);
  }
  .nav-toggle { display: block; }
  .nav-toggle.is-open i:first-child { transform: translateY(4.5px) rotate(45deg); }
  .nav-toggle.is-open i:nth-child(2) { opacity: 0; }
  .nav-toggle.is-open i:last-child { transform: translateY(-4.5px) rotate(-45deg); }
}

@media (min-width: 1300px) {
  .brand__tag { display: block; }
}

@media (max-width: 860px) {
  .band__head {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__grid > :first-child { grid-column: 1 / -1; }
}