/* ============================================================================
   AVINYAI — SHELL, NAVIGATION, FOOTER, REVEAL
   ========================================================================= */

/* ---- Shell ------------------------------------------------------------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.band { padding: var(--band) 0; position: relative; }
.band--tight { padding: 92px 0; }
.band--alt { background: var(--bg-2); }
.band--deep { background: #030610; }

.rule { height: 1px; background: var(--line); border: 0; }

/* Editorial section header */
.head { max-width: 720px; }
.head .eyebrow { margin-bottom: 22px; }
.head h2 + .lede { margin-top: 22px; }
.head--center { margin: 0 auto; text-align: center; }
.head--center .eyebrow { justify-content: center; }
.head--center .lede { margin-left: auto; margin-right: auto; }

.head--split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: 64px;
  align-items: end;
  max-width: none;
}

/* ---- Ambient background ----------------------------------------------- */
.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(80% 55% at 18% -8%, rgba(47, 107, 255, 0.10), transparent 68%),
    radial-gradient(60% 45% at 92% 4%, rgba(34, 211, 238, 0.055), transparent 70%);
}

.ambient::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(126, 158, 205, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(126, 158, 205, 0.05) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(115% 70% at 50% 0%, #000 12%, transparent 74%);
  mask-image: radial-gradient(115% 70% at 50% 0%, #000 12%, transparent 74%);
}

main, header, footer { position: relative; z-index: 1; }

/* ---- Navigation -------------------------------------------------------- */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 68px;
  display: flex;
  align-items: center;
  background: rgba(5, 9, 20, 0.42);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  border-bottom: 1px solid transparent;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease), height var(--t) var(--ease);
}

.nav.is-scrolled {
  height: 60px;
  background: rgba(5, 9, 20, 0.88);
  border-bottom-color: var(--line);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 40px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.brand { display: flex; align-items: center; gap: 9px; flex: none; }
.brand__mark { height: 26px; width: auto; }
.brand__word { height: 17px; width: auto; }
.brand__fallback {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: 0.09em;
  color: #E8E6E2;
}

.nav__links { display: flex; align-items: center; gap: 4px; margin-right: auto; }

.nav__links a {
  display: block;
  padding: 8px 13px;
  font-size: 0.875rem;
  letter-spacing: -0.006em;
  color: var(--ink-2);
  border-radius: var(--radius);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.nav__links a:hover { color: var(--ink); background: rgba(126, 158, 205, 0.07); }

.nav__right { display: flex; align-items: center; gap: 8px; flex: none; }

.nav__text-link {
  padding: 8px 12px;
  font-size: 0.875rem;
  color: var(--ink-2);
  transition: color var(--t-fast) var(--ease);
}
.nav__text-link:hover { color: var(--ink); }

/* ---- Mobile menu ------------------------------------------------------- */
.burger {
  display: none;
  width: 40px;
  height: 40px;
  place-items: center;
  flex: none;
  border-radius: var(--radius);
}
.burger span {
  display: block;
  width: 19px;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--t) var(--ease), opacity var(--t-fast) var(--ease);
}
.burger span + span { margin-top: 5px; }
.burger.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.sheet {
  position: fixed;
  inset: 68px 0 auto;
  z-index: 99;
  background: rgba(5, 9, 20, 0.98);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  padding: 12px var(--gutter) 32px;
  display: grid;
  gap: 2px;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t) var(--ease), transform var(--t) var(--ease), visibility var(--t);
  max-height: calc(100vh - 68px);
  overflow-y: auto;
}

.sheet.is-open { opacity: 1; transform: none; visibility: visible; }

.sheet a:not(.btn) {
  padding: 15px 2px;
  font-family: var(--display);
  font-size: 1.375rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--line);
}

.sheet .btn { margin-top: 20px; justify-content: center; }

/* ---- Footer ------------------------------------------------------------ */
.foot {
  border-top: 1px solid var(--line);
  background: var(--bg-2);
  padding: 84px 0 34px;
}

.foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(4, minmax(0, 1fr));
  gap: 56px 40px;
}

.foot__brand p {
  margin-top: 20px;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--ink-3);
  max-width: 27ch;
}

.foot__col h4 {
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 18px;
}

.foot__col a {
  display: block;
  font-size: 0.8438rem;
  color: var(--ink-2);
  padding: 5px 0;
  transition: color var(--t-fast) var(--ease);
}
.foot__col a:hover { color: var(--ink); }

.foot__bottom {
  margin-top: 76px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--ink-3);
}

.foot__legal { display: flex; gap: 26px; flex-wrap: wrap; }
.foot__legal a { transition: color var(--t-fast) var(--ease); }
.foot__legal a:hover { color: var(--ink-2); }

.foot__social { display: flex; gap: 8px; }
.foot__social a {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink-3);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.foot__social a:hover { color: var(--ink); border-color: var(--line-3); background: rgba(126, 158, 205, 0.06); }

/* ---- Reveal on scroll -------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out);
}
[data-reveal].is-in { opacity: 1; transform: none; }

[data-reveal-group] > * {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 480ms var(--ease-out), transform 480ms var(--ease-out);
}
[data-reveal-group].is-in > * { opacity: 1; transform: none; }
[data-reveal-group].is-in > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-group].is-in > *:nth-child(2) { transition-delay: 70ms; }
[data-reveal-group].is-in > *:nth-child(3) { transition-delay: 140ms; }
[data-reveal-group].is-in > *:nth-child(4) { transition-delay: 210ms; }
[data-reveal-group].is-in > *:nth-child(5) { transition-delay: 280ms; }
[data-reveal-group].is-in > *:nth-child(6) { transition-delay: 350ms; }
[data-reveal-group].is-in > *:nth-child(7) { transition-delay: 420ms; }

.skip {
  position: absolute;
  left: 16px; top: -60px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  transition: top var(--t-fast) var(--ease);
}
.skip:focus { top: 14px; }