/* ==========================================================================
   layout.css — container, grid, header, mobile menu, section scaffolding, footer
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.section + .section {
  border-top: var(--hair) solid var(--c-line);
}

/* ---------- Section head: huge index numeral + label + title ---------- */
.sec-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  margin-block-end: clamp(3rem, 2rem + 4vw, 6rem);
}

.sec-head__index {
  position: relative;
  font-family: var(--f-display);
  font-size: var(--fs-index);
  line-height: 0.8;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px var(--c-line-strong);
  user-select: none;
}

.sec-head__index sup {
  position: absolute;
  inset-block-start: 0.4em;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--c-accent);
  -webkit-text-stroke: 0;
  margin-inline-start: var(--s-3);
}

.sec-head__text {
  display: grid;
  gap: var(--s-4);
  align-content: end;
}

.sec-head__label {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.sec-head__label::before {
  content: "";
  inline-size: 2.5rem;
  block-size: var(--hair);
  background: var(--c-accent);
}

.sec-head__title {
  font-family: var(--f-display);
  font-size: var(--fs-2xl);
  line-height: 1.02;
  letter-spacing: -0.015em;
  max-inline-size: 18ch;
}

.sec-head__title em {
  color: var(--c-accent);
}

@media (min-width: 900px) {
  .sec-head {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--s-6);
    align-items: end;
  }
}

/* Small measurement ruler used under section heads and in the footer */
.ruler {
  block-size: 10px;
  background:
    repeating-linear-gradient(90deg, var(--c-line-strong) 0 1px, transparent 1px 50px) bottom / 100% 10px no-repeat,
    repeating-linear-gradient(90deg, var(--c-line) 0 1px, transparent 1px 10px) bottom / 100% 5px no-repeat;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 50;
  block-size: var(--header-h);
  transition: transform var(--dur) var(--ease-out), background-color var(--dur-fast) var(--ease-soft);
}

.site-header::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0;
  block-size: var(--hair);
  background: var(--c-line);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}

.site-header.is-scrolled {
  background: color-mix(in srgb, var(--c-bg) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-header.is-scrolled::after {
  transform: scaleX(1);
}

.site-header.is-hidden {
  transform: translateY(-100%);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  block-size: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
}

.brand__mark {
  inline-size: 2rem;
  block-size: 2rem;
  color: var(--c-ink);
  transition: color var(--dur-fast) var(--ease-soft);
}

.brand:hover .brand__mark {
  color: var(--c-accent);
}

.brand__name {
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.brand__meta {
  display: none;
  padding-inline-start: var(--s-3);
  border-inline-start: var(--hair) solid var(--c-line);
}

.site-nav {
  display: none;
}

.site-nav__list {
  display: flex;
  gap: clamp(1rem, 0.2rem + 1.6vw, 2.25rem);
}

.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: var(--s-1);
  font-size: var(--fs-sm);
  padding-block: var(--s-2);
}

.site-nav__num {
  font-size: var(--fs-2xs);
  color: var(--c-muted);
}

.site-nav__link[aria-current="true"] .site-nav__num {
  color: var(--c-accent);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.site-header__cv {
  display: none;
}

@media (min-width: 640px) {
  .brand__meta {
    display: inline;
  }

  .site-header__cv {
    display: inline-flex;
  }
}

@media (min-width: 1024px) {
  .site-nav {
    display: block;
  }

  .menu-toggle {
    display: none;
  }
}

/* Lock page scroll behind overlays (Lenis handles this itself when active) */
html.menu-open,
html.modal-open {
  overflow: hidden;
}

/* ---------- Mobile menu ---------- */
.menu-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  block-size: 2.75rem;
  padding-inline: var(--s-3);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: var(--hair) solid var(--c-line-strong);
  border-radius: var(--radius);
}

.menu-toggle__bars {
  position: relative;
  inline-size: 1.125rem;
  block-size: 0.5rem;
}

.menu-toggle__bars::before,
.menu-toggle__bars::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  block-size: 1.5px;
  background: currentColor;
  transition: transform var(--dur-fast) var(--ease-out);
}

.menu-toggle__bars::before {
  inset-block-start: 0;
}

.menu-toggle__bars::after {
  inset-block-end: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bars::before {
  transform: translateY(3.25px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bars::after {
  transform: translateY(-3.25px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 45;
  display: grid;
  grid-template-rows: 1fr auto;
  padding: calc(var(--header-h) + var(--s-6)) var(--gutter) var(--s-6);
  background: var(--c-bg);
  clip-path: inset(0 0 100% 0);
  visibility: hidden;
  transition: clip-path 0.7s var(--ease-in-out), visibility 0s linear 0.7s;
}

.mobile-menu.is-open {
  clip-path: inset(0 0 0 0);
  visibility: visible;
  transition: clip-path 0.7s var(--ease-in-out), visibility 0s linear 0s;
}

.mobile-menu__list {
  display: grid;
  align-content: center;
  gap: var(--s-2);
}

.mobile-menu__link {
  display: flex;
  align-items: baseline;
  gap: var(--s-4);
  padding-block: var(--s-2);
  font-family: var(--f-display);
  font-size: clamp(2.5rem, 1.5rem + 7vw, 4.5rem);
  line-height: 1;
  border-bottom: var(--hair) solid var(--c-line);
  overflow: hidden;
}

.mobile-menu__link span {
  display: inline-block;
  transform: translateY(110%);
  transition: transform 0.8s var(--ease-out);
  transition-delay: calc(0.18s + var(--i, 0) * 0.06s);
}

.mobile-menu__link .label {
  align-self: center;
}

.mobile-menu.is-open .mobile-menu__link span {
  transform: translateY(0);
}

.mobile-menu__foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--s-3);
  font-size: var(--fs-sm);
  color: var(--c-muted);
}

@media (min-width: 1024px) {
  .mobile-menu {
    display: none;
  }
}

/* ---------- Footer ---------- */
.site-footer {
  padding-block: var(--s-7) var(--s-6);
  border-top: var(--hair) solid var(--c-line);
}

.site-footer__inner {
  display: grid;
  gap: var(--s-5);
}

.site-footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
}

.site-footer__copy {
  font-size: var(--fs-sm);
  color: var(--c-muted);
}

/* Row of tiny square pads, like a pin header on a board */
.pin-header {
  display: flex;
  gap: 6px;
}

.pin-header i {
  inline-size: 8px;
  block-size: 8px;
  border: var(--hair) solid var(--c-line-strong);
}

.pin-header i:first-child {
  background: var(--c-accent-fill);
  border-color: var(--c-accent-fill);
}