.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--layer-header);
  padding: max(0.75rem, env(safe-area-inset-top)) var(--page-gutter) 0;
  pointer-events: none;
}

.header-shell {
  position: relative;
  width: min(100%, var(--content-max));
  min-height: var(--header-height);
  margin-inline: auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-3);
  padding: 0.35rem 0.6rem 0.35rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  pointer-events: auto;
  transition:
    background-color var(--duration-medium) var(--ease-standard),
    border-color var(--duration-medium) var(--ease-standard),
    box-shadow var(--duration-medium) var(--ease-standard),
    backdrop-filter var(--duration-medium) var(--ease-standard);
}

.site-header.is-scrolled .header-shell,
.site-header:focus-within .header-shell,
.nav-open .header-shell {
  border-color: var(--line-soft);
  background: rgba(7, 7, 11, 0.78);
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.26);
  backdrop-filter: blur(22px) saturate(135%);
  -webkit-backdrop-filter: blur(22px) saturate(135%);
}

.scroll-progress {
  position: absolute;
  right: 1.2rem;
  bottom: -1px;
  left: 1.2rem;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  background: var(--line-soft);
  transition: opacity var(--duration-medium) var(--ease-standard);
}

.site-header.is-scrolled .scroll-progress {
  opacity: 1;
}

.scroll-progress::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-brand);
  transform: scaleX(var(--page-progress, 0));
  transform-origin: left center;
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  gap: 0.7rem;
  color: var(--paper-100);
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 760;
  letter-spacing: 0.13em;
  line-height: 1;
  text-decoration: none;
}

.brand img {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  box-shadow: 0 0.35rem 1.4rem rgba(236, 61, 137, 0.2);
}

.primary-nav {
  justify-self: center;
}

.primary-nav ul,
.footer-links,
.social-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2.35rem);
}

.primary-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--text-secondary);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.015em;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

.primary-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -0.5rem;
  left: 0;
  height: 1px;
  background: var(--paper-100);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-medium) var(--ease-out);
}

.primary-nav a:hover,
.primary-nav a[aria-current="true"] {
  color: var(--paper-100);
}

.primary-nav a:hover::after,
.primary-nav a[aria-current="true"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.register-control {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  padding: 0.625rem 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-pill);
  background: var(--paper-100);
  color: var(--ink-950);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  line-height: 1;
  text-decoration: none;
  transition:
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-medium) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard);
}

.register-control::after {
  content: "↗";
  font-size: 0.9rem;
  transition: transform var(--duration-fast) var(--ease-out);
}

.register-control:hover {
  background: #ffffff;
  box-shadow: 0 0.9rem 2.4rem rgba(255, 93, 157, 0.22);
  transform: translateY(-2px);
}

.register-control:hover::after {
  transform: translate(2px, -2px);
}

.menu-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  width: 1.1rem;
  height: 1px;
  display: block;
  margin: 0.28rem auto;
  background: currentColor;
  transition:
    transform var(--duration-medium) var(--ease-out),
    opacity var(--duration-fast) linear;
}

.nav-open .menu-toggle span:first-child {
  transform: translateY(0.28rem) rotate(45deg);
}

.nav-open .menu-toggle span:last-child {
  transform: translateY(-0.28rem) rotate(-45deg);
}

main {
  position: relative;
  overflow: clip;
}

.scene {
  position: relative;
  isolation: isolate;
}

.scene-inner {
  position: relative;
  z-index: var(--layer-scene);
  width: min(calc(100% - (2 * var(--page-gutter))), var(--content-max));
  margin-inline: auto;
}

.scene-heading {
  font-size: var(--step-4);
}

.scene-copy {
  max-width: var(--measure);
  color: var(--text-secondary);
  font-size: var(--step-1);
  line-height: 1.55;
}

.scene-chapter {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: var(--space-4);
}

.scene-chapter::after {
  content: "";
  width: min(8rem, 16vw);
  height: 1px;
  background: var(--line-soft);
}

.site-footer {
  position: relative;
  z-index: 3;
  padding: var(--space-6) var(--page-gutter) max(2.2rem, env(safe-area-inset-bottom));
  border-top: 1px solid var(--line-soft);
  background: var(--ink-950);
}

.footer-shell {
  width: min(100%, var(--content-max));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(15rem, 1fr) minmax(18rem, 2fr);
  gap: var(--space-5);
  align-items: end;
}

.footer-brand {
  display: grid;
  gap: 0.85rem;
}

.footer-brand strong {
  font-family: var(--font-display);
  font-size: var(--step-2);
  letter-spacing: -0.025em;
}

.footer-brand p,
.footer-meta {
  color: var(--text-tertiary);
  font-size: var(--step--1);
}

.footer-navigation {
  display: grid;
  gap: var(--space-3);
  justify-items: end;
}

.footer-links,
.social-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.8rem clamp(1rem, 2vw, 1.8rem);
}

.footer-links a,
.social-links a {
  color: var(--text-secondary);
  font-size: var(--step--1);
  text-decoration-color: transparent;
  transition:
    color var(--duration-fast) var(--ease-standard),
    text-decoration-color var(--duration-fast) var(--ease-standard);
}

.footer-links a:hover,
.social-links a:hover {
  color: var(--paper-100);
  text-decoration-color: currentColor;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.6rem 1.2rem;
}