/* =========================================================
   Layout — container, header, navigation, footer
   ========================================================= */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: var(--section-pad);
}

/* ---------- Logo ---------- */
.logo {
  font-family: var(--f-display);
  font-stretch: 100%;
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1;
  white-space: nowrap;
}
.logo__accent { font-weight: 600; color: var(--c-violet-hi); }
.logo__muted  { font-weight: 300; color: var(--c-text-2); }
.logo--sm   { font-size: 1.1rem; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-header);
  padding-block: var(--s-5);
  transition:
    padding var(--dur-base) var(--ease-out),
    background-color var(--dur-base) var(--ease-out),
    backdrop-filter var(--dur-base) var(--ease-out);
}
.site-header.is-scrolled {
  padding-block: var(--s-3);
  background: rgb(6 5 10 / 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
}

.site-nav__list {
  display: flex;
  gap: clamp(1.5rem, 1rem + 2vw, 3.25rem);
}
.site-nav__link {
  position: relative;
  font-size: var(--fs-sm);
  color: var(--c-text-2);
  padding-block: var(--s-2);
  transition: color var(--dur-fast) linear;
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--c-green);
  box-shadow: var(--glow-green);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur-base) var(--ease-out);
}
.site-nav__link:hover,
.site-nav__link[aria-current="true"] { color: var(--c-text); }
.site-nav__link:hover::after,
.site-nav__link[aria-current="true"]::after { transform: scaleX(1); transform-origin: left; }

.menu-toggle {
  display: none;
  width: 44px; height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border-radius: 50%;
  border: 1px solid var(--c-line-strong);
}
.menu-toggle__bar {
  width: 18px; height: 1.5px;
  background: currentColor;
  transition: transform var(--dur-base) var(--ease-out);
}
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:first-of-type { transform: translateY(4.25px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:last-of-type  { transform: translateY(-4.25px) rotate(-45deg); }

@media (max-width: 767px) {
  .menu-toggle { display: inline-flex; position: relative; z-index: 2; }

  .site-nav {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    background: rgb(6 5 10 / 0.96);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur-base) var(--ease-out), visibility var(--dur-base);
  }
  .site-nav.is-open { opacity: 1; visibility: visible; }
  .site-nav__list { flex-direction: column; align-items: center; gap: var(--s-6); }
  .site-nav__link {
    font-family: var(--f-display);
    font-stretch: 112%;
    font-size: 2rem;
    text-transform: uppercase;
    color: var(--c-text);
  }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--c-line);
  padding-block: var(--s-7);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: var(--s-6);
}
.site-footer__tagline { color: var(--c-text-3); font-size: var(--fs-sm); }
.site-footer__nav { display: flex; gap: var(--s-5); }
.site-footer__nav a {
  font-size: var(--fs-sm);
  color: var(--c-text-2);
  transition: color var(--dur-fast) linear;
}
.site-footer__nav a:hover { color: var(--c-green); }
.site-footer__copy { font-size: var(--fs-xs); color: var(--c-text-3); }

@media (max-width: 900px) {
  .site-footer__inner { grid-template-columns: 1fr; justify-items: start; gap: var(--s-4); }
}