/* ============================================================
   Story of US - header, brand, navigation, mobile paper layer
   ============================================================ */

.header-sentinel {
  position: absolute;
  top: 24px;
  left: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  transition:
    background-color var(--dur-state) var(--ease-out),
    box-shadow var(--dur-state) var(--ease-out);
}

.site-header.is-scrolled {
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--hairline);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--ink);
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.2em;
  color: var(--ink);
}

.brand-sub {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--red);
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
  padding: 0.35rem 0;
  transition: color var(--dur-state) var(--ease-out);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--red);
}

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -6px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--red);
  transform: translateX(-50%);
}

.nav-cta {
  margin-left: 0.5rem;
  padding: 0.6rem 1.4rem;
  font-size: 0.92rem;
}

.menu-toggle {
  display: none;
  place-items: center;
  min-width: 44px;
  min-height: 44px;
  background: none;
  border: 0;
  padding: 0.55rem;
  cursor: pointer;
  z-index: calc(var(--z-menu) + 1);
  touch-action: manipulation;
}

.menu-toggle-bars {
  display: block;
  position: relative;
  width: 26px;
  height: 2px;
  background: var(--ink);
  transition: background-color var(--dur-state) var(--ease-out);
}

.menu-toggle-bars::before,
.menu-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 26px;
  height: 2px;
  background: var(--ink);
  transition: transform var(--dur-state) var(--ease-out);
}

.menu-toggle-bars::before {
  top: -8px;
}

.menu-toggle-bars::after {
  top: 8px;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bars {
  background: transparent;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bars::before {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bars::after {
  transform: translateY(-8px) rotate(-45deg);
}

.mobile-menu {
  display: flex;
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  height: 100dvh;
  max-height: 100dvh;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--paper);
  padding:
    calc(72px + env(safe-area-inset-top) + 1.4rem)
    var(--gutter)
    calc(2rem + env(safe-area-inset-bottom));
  flex-direction: column;
  gap: 0.25rem;
  visibility: hidden;
  pointer-events: none;
  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity var(--dur-state) var(--ease-out),
    transform var(--dur-state) var(--ease-out),
    visibility 0s linear var(--dur-state);
}

.mobile-menu.is-open {
  visibility: visible;
  pointer-events: auto;
  opacity: 1;
  transform: none;
  transition-delay: 0s;
}

.mobile-menu a {
  display: flex;
  align-items: center;
  min-height: 44px;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 7vw, 2.6rem);
  font-weight: 600;
  color: var(--ink);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--hairline);
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity var(--dur-state) var(--ease-out),
    transform var(--dur-state) var(--ease-out),
    color var(--dur-state) var(--ease-out);
}

.mobile-menu.is-open a {
  opacity: 1;
  transform: none;
}

.mobile-menu.is-open a:nth-child(2) { transition-delay: 30ms; }
.mobile-menu.is-open a:nth-child(3) { transition-delay: 60ms; }
.mobile-menu.is-open a:nth-child(4) { transition-delay: 90ms; }
.mobile-menu.is-open a:nth-child(5) { transition-delay: 120ms; }
.mobile-menu.is-open a:nth-child(6) { transition-delay: 150ms; }

.mobile-menu a[aria-current="page"] {
  color: var(--red);
}

.mobile-menu .mobile-menu-cta {
  min-height: 48px;
  margin-top: 1.35rem;
  padding-inline: 1.5rem;
  border-bottom: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  align-self: flex-start;
  background: var(--red);
  color: var(--on-red);
}

.noscript-menu {
  display: none;
}

html.menu-locked,
html.menu-locked body {
  overflow: hidden;
  overscroll-behavior: none;
}

main {
  padding-top: 72px;
}

main.main-flush {
  padding-top: 0;
}

@media (max-width: 900px) {
  .header-inner {
    gap: 0.5rem;
  }

  .brand {
    min-width: 0;
    gap: 0.55rem;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .brand-text {
    min-width: 0;
  }

  .brand-name,
  .brand-sub {
    white-space: nowrap;
  }

  .brand-name {
    font-size: 0.94rem;
    letter-spacing: 0.16em;
  }

  .brand-sub {
    font-size: 0.56rem;
    letter-spacing: 0.16em;
  }
  .site-header.is-scrolled {
    background: color-mix(in srgb, var(--paper) 97%, transparent);
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
  }

  .site-nav {
    display: none;
  }

  .menu-toggle {
    display: grid;
  }

  .no-js .menu-toggle {
    display: none;
  }

  .no-js .noscript-menu {
    display: block;
    margin-left: auto;
  }

  .noscript-menu summary {
    min-width: 44px;
    min-height: 44px;
    display: grid;
    place-items: center;
    color: var(--ink);
    font-weight: 700;
    cursor: pointer;
    list-style: none;
  }

  .noscript-menu summary::-webkit-details-marker {
    display: none;
  }

  .noscript-menu nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: var(--z-menu);
    max-height: calc(100dvh - 72px);
    overflow-y: auto;
    padding: 1.25rem var(--gutter) calc(2rem + env(safe-area-inset-bottom));
    background: var(--paper);
    border-top: 1px solid var(--hairline);
    box-shadow: var(--shadow-soft);
  }

  .noscript-menu nav a {
    min-height: 48px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--hairline);
    color: var(--ink);
    font-family: var(--font-display);
    font-size: 1.45rem;
  }
}

@media (min-width: 901px) {
  .mobile-menu {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-menu,
  .mobile-menu a,
  .menu-toggle-bars,
  .menu-toggle-bars::before,
  .menu-toggle-bars::after {
    transition: none;
  }
}