/* ==========================================================================
   Layout: stage, container, header, menu, sections, footer
   ========================================================================== */

/* ---------- Background stage and grain ---------- */

.stage {
  position: fixed;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  /* Shown as is when WebGL is missing; js/stage.js paints over it otherwise. */
  background:
    radial-gradient(ellipse 60% 45% at 50% 55%, var(--color-copper-glow), transparent 70%),
    radial-gradient(ellipse at center, transparent 40%, var(--color-bg-deep) 100%),
    var(--color-bg);
}

/* Film grain over everything, as on the banner's paper. */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 150;
  pointer-events: none;
  opacity: 0.09;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1.4 -0.2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 900ms steps(6) infinite;
}

@keyframes grain {
  0% { transform: translate(0, 0); }
  20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -4%); }
  60% { transform: translate(-4%, -1%); }
  80% { transform: translate(3%, 3%); }
  100% { transform: translate(0, 0); }
}

/* ---------- Container ---------- */

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

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  height: var(--header-height);
  padding-inline: var(--gutter);
  transition: background-color var(--duration) ease, backdrop-filter var(--duration) ease;
}

.site-header.is-scrolled {
  background: var(--color-header);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--color-line);
}

.brand {
  font-family: var(--font-display);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--color-text-bright);
  text-decoration: none;
}

.site-nav {
  display: none;
  margin-inline: auto;
}

.site-nav__list {
  display: flex;
  gap: clamp(0.9rem, 1.8vw, 2.25rem);
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.55em;
  padding-block: var(--space-sm);
  color: var(--color-text);
  text-decoration: none;
}

.site-nav__num {
  font-size: 0.85em;
  color: var(--color-copper);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  inset: auto 0 0.2rem;
  height: 1px;
  background: var(--color-copper);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration) var(--ease-out);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav__link[aria-current] {
  color: var(--color-text-bright);
}

.status {
  display: none;
  align-items: center;
  white-space: nowrap;
  gap: 0.6em;
  color: var(--color-text);
  text-decoration: none;
}

.status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-copper-bright);
  box-shadow: 0 0 0 0 var(--color-copper-glow);
  animation: pulse 2.4s ease-out infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 var(--color-copper-glow); }
  70%, 100% { box-shadow: 0 0 0 10px transparent; }
}

.menu-toggle {
  margin-left: auto;
  min-width: var(--tap-min);
  min-height: var(--tap-min);
  padding: 0 var(--space-md);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-pill);
  background: transparent;
}

.menu-toggle__close,
.menu-toggle[aria-expanded="true"] .menu-toggle__open {
  display: none;
}

.menu-toggle[aria-expanded="true"] .menu-toggle__close {
  display: inline;
}

/* Nine sections: on smaller laptops the numerals step aside so the links fit on one line. */
@media (min-width: 64em) and (max-width: 79.99em) {
  .site-nav__num {
    display: none;
  }
}

@media (min-width: 64em) {
  .site-nav,
  .status {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }
}

/* ---------- Full-screen menu (phones, tablets) ---------- */

.menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(var(--header-height) + var(--space-xl)) var(--gutter) var(--space-xl);
  background: var(--color-bg-deep); /* solid, so the page doesn't show through */
  opacity: 0;
  transition: opacity 450ms var(--ease-out);
}

/* display: flex above would override the hidden attribute and leave an invisible layer catching clicks. */
.menu[hidden] {
  display: none;
}

.menu.is-open {
  opacity: 1;
}

.menu__list li {
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
}

.menu__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  padding-block: 0.15em;
  font-family: var(--font-body);
  font-size: clamp(2rem, 8vw, 3.25rem);
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-text-bright);
  text-decoration: none;
  transform: translateY(100%);
  transition: transform 700ms var(--ease-out);
}

.menu.is-open .menu__link {
  transform: none;
}

.menu.is-open li:nth-child(2) .menu__link { transition-delay: 50ms; }
.menu.is-open li:nth-child(3) .menu__link { transition-delay: 100ms; }
.menu.is-open li:nth-child(4) .menu__link { transition-delay: 150ms; }
.menu.is-open li:nth-child(5) .menu__link { transition-delay: 200ms; }
.menu.is-open li:nth-child(6) .menu__link { transition-delay: 250ms; }
.menu.is-open li:nth-child(7) .menu__link { transition-delay: 300ms; }
.menu.is-open li:nth-child(8) .menu__link { transition-delay: 350ms; }

.menu__num {
  min-width: 2.5em;
  color: var(--color-copper);
}

.menu__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

/* ---------- Sections ---------- */

main:focus {
  outline: none;
}

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

/* "II ——— The artist" */
.section-head {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  font-family: var(--font-caps);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
}

.section-head__num {
  color: var(--color-copper);
}

.section-head__label {
  order: 2;
  color: var(--color-text-muted);
}

.section-head::before {
  content: "";
  order: 1;
  width: clamp(2rem, 8vw, 6rem);
  height: 1px;
  background: var(--color-copper-deep);
}

.section-head::after {
  content: "";
  order: 3;
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--color-line), transparent);
}

.display {
  font-size: var(--fs-h2);
  line-height: var(--lh-heading);
  letter-spacing: -0.01em;
}

/* Big heading on the left, a short note on the right. */
.split-head {
  display: grid;
  gap: var(--space-lg);
  align-items: end;
  margin-bottom: var(--space-xl);
}

.split-head__aside {
  max-width: 28rem;
  color: var(--color-text-muted);
}

.split-head__count {
  display: flex;
  align-items: baseline;
  gap: 0.5em;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
  font-size: var(--fs-md);
}

@media (min-width: 48em) {
  .split-head {
    grid-template-columns: 1fr auto;
  }
}

/* ---------- Footer ---------- */

.site-footer {
  position: relative;
  overflow: hidden;
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-line);
}

.site-footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md) var(--space-lg);
  padding-inline: var(--gutter);
  color: var(--color-text-muted);
}

.site-footer__row a {
  text-decoration: none;
}

.site-footer__name {
  max-width: none;
  margin-top: var(--space-md);
  padding-bottom: 0.08em;
  font-family: var(--font-display);
  font-size: clamp(7rem, 36vw, 38rem);
  line-height: 1.1;
  text-align: center;
  white-space: nowrap;
  color: var(--color-text-bright);
}