@layer layout {
  .container {
    width: 100%;
    max-width: calc(var(--container) + 2 * var(--gutter));
    margin-inline: auto;
    padding-inline: max(var(--gutter), env(safe-area-inset-left)) max(var(--gutter), env(safe-area-inset-right));
  }

  .container--wide {
    max-width: calc(92rem + 2 * var(--gutter));
  }

  .section {
    padding-top: var(--section);
  }

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

  .section--tight {
    padding-top: calc(var(--section) * 0.75);
  }

  .section-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem 1.25rem;
    margin-bottom: clamp(1.75rem, 4vw, 3.25rem);
    padding-top: 1.25rem;
    border-top: 1px solid var(--line);
  }

  .section-head__index {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--pink-text);
  }

  .section-head__title {
    flex: 1 1 auto;
    font-size: var(--step-4);
  }

  .section-head__more {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    min-height: 2.75rem;
    color: var(--muted);
    font-size: 0.95rem;
    text-decoration: none;
    transition: color 0.2s;

    &:hover {
      color: var(--text);
    }
  }

  /* Header. The header itself is never transformed, otherwise it would become
     the containing block for the fixed mobile menu inside it. */
  .site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 50;
    height: calc(var(--header-h) + env(safe-area-inset-top));
    padding-top: env(safe-area-inset-top);

    &::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgb(12 10 18 / 0.72);
      -webkit-backdrop-filter: blur(14px) saturate(140%);
      backdrop-filter: blur(14px) saturate(140%);
      border-bottom: 1px solid var(--line);
      opacity: 0;
      transition: opacity 0.3s, translate 0.45s var(--ease-out);
    }

    &.is-scrolled::before {
      opacity: 1;
    }

    &.is-hidden {
      pointer-events: none;

      &::before,
      .site-header__inner {
        translate: 0 -110%;
      }
    }
  }

  .site-header__inner {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    transition: translate 0.45s var(--ease-out);
  }

  .brand {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    min-height: 2.75rem;
    text-decoration: none;
  }

  .brand__mark {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    box-shadow: 0 0 0 1px var(--line-strong), 0 0 20px rgb(255 118 164 / 0.3);
    transition: rotate 0.4s var(--ease-out), scale 0.4s var(--ease-out);
  }

  .brand:hover .brand__mark {
    rotate: -8deg;
    scale: 1.06;
  }

  .brand__name {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1;
  }

  .menu-toggle {
    position: relative;
    z-index: 1;
    display: none;
    align-items: center;
    gap: 0.75rem;
    min-height: 2.75rem;
    padding: 0 0.25rem 0 0.9rem;
    border: 1px solid var(--line-strong);
    border-radius: 99px;
    background: rgb(12 10 18 / 0.5);
    font-size: 0.9rem;
  }

  .menu-toggle__icon {
    position: relative;
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;

    & span {
      position: absolute;
      width: 1rem;
      height: 1.5px;
      border-radius: 2px;
      background: currentColor;
      transition: translate 0.35s var(--ease-out), rotate 0.35s var(--ease-out);
    }

    & span:first-child {
      translate: 0 -3px;
    }

    & span:last-child {
      translate: 0 3px;
    }
  }

  .menu-open .menu-toggle__icon {
    & span:first-child {
      translate: none;
      rotate: 45deg;
    }

    & span:last-child {
      translate: none;
      rotate: -45deg;
    }
  }

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

  .site-nav__list {
    display: flex;
    gap: 1.75rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .site-nav__link {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
    color: var(--muted);
    font-size: 0.95rem;
    text-decoration: none;
    transition: color 0.2s;

    &::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0.55rem;
      height: 1px;
      background: var(--fluid);
      scale: 0 1;
      transform-origin: right;
      transition: scale 0.4s var(--ease-out);
    }

    &:hover,
    &[aria-current="page"] {
      color: var(--text);

      &::after {
        scale: 1 1;
        transform-origin: left;
      }
    }
  }

  .lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 2.5rem;
    padding-inline: 0.85rem;
    border: 1px solid var(--line-strong);
    border-radius: 99px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    text-decoration: none;
    transition: border-color 0.2s, background-color 0.2s;

    &:hover {
      border-color: var(--text);
      background: rgb(243 238 248 / 0.06);
    }
  }

  .lang-switch__current,
  .lang-switch__sep {
    color: var(--faint);
  }

  @media (max-width: 47.99em) {
    .menu-toggle {
      display: inline-flex;
    }

    .site-nav {
      position: fixed;
      inset: 0;
      z-index: -1;
      flex-direction: column;
      align-items: flex-start;
      justify-content: center;
      gap: 2.5rem;
      padding: calc(var(--header-h) + env(safe-area-inset-top) + 1rem) var(--gutter) calc(2.5rem + env(safe-area-inset-bottom));
      overflow-y: auto;
      background:
        radial-gradient(90% 60% at 100% 0%, rgb(192 17 215 / 0.28), transparent 70%),
        radial-gradient(80% 60% at 0% 100%, rgb(47 60 190 / 0.35), transparent 70%),
        var(--bg);
      clip-path: circle(0 at calc(100% - 2.75rem) 2.1rem);
      visibility: hidden;
      transition: clip-path 0.55s var(--ease-in-out), visibility 0s 0.55s;
    }

    .menu-open .site-nav {
      clip-path: circle(150% at calc(100% - 2.75rem) 2.1rem);
      visibility: visible;
      transition: clip-path 0.7s var(--ease-out), visibility 0s;
    }

    .menu-open .site-header::before {
      opacity: 0;
    }

    .site-nav__list {
      flex-direction: column;
      gap: 0.25rem;
    }

    .site-nav__link {
      font-family: var(--font-display);
      font-size: clamp(2.25rem, 11vw, 3.25rem);
      font-weight: 600;
      letter-spacing: -0.03em;
      color: var(--text);
      opacity: 0;
      translate: 0 1rem;
      transition: opacity 0.4s, translate 0.5s var(--ease-out);

      &::after {
        bottom: 0.4rem;
      }
    }

    .menu-open .site-nav__link {
      opacity: 1;
      translate: none;
    }

    .menu-open .site-nav__item:nth-child(1) .site-nav__link { transition-delay: 0.12s; }
    .menu-open .site-nav__item:nth-child(2) .site-nav__link { transition-delay: 0.18s; }
    .menu-open .site-nav__item:nth-child(3) .site-nav__link { transition-delay: 0.24s; }
    .menu-open .site-nav__item:nth-child(4) .site-nav__link { transition-delay: 0.3s; }
    .menu-open .site-nav__item:nth-child(5) .site-nav__link { transition-delay: 0.36s; }

    .lang-switch {
      min-height: 2.75rem;
      font-size: 0.85rem;
    }
  }

  /* Without JS the menu button can't do anything, so show the links inline */
  @media (max-width: 47.99em) and (scripting: none) {
    .site-header {
      position: absolute;
      height: auto;
    }

    .site-header__inner {
      flex-wrap: wrap;
      padding-block: 0.75rem;
    }

    .menu-toggle {
      display: none;
    }

    .site-nav {
      position: static;
      flex-direction: row;
      flex-wrap: wrap;
      gap: 0.5rem 1rem;
      padding: 0;
      background: none;
      clip-path: none;
      visibility: visible;
    }

    .site-nav__list {
      flex-direction: row;
      flex-wrap: wrap;
      gap: 0 1rem;
    }

    .site-nav__link {
      font-family: var(--font-body);
      font-size: 0.95rem;
      opacity: 1;
      translate: none;
    }
  }

  .menu-open,
  .lightbox-open {
    overflow: hidden;
  }

  /* Subpage heads */
  .page-head {
    position: relative;
    isolation: isolate;
    padding-block: calc(var(--header-h) + clamp(3rem, 9vw, 7.5rem)) clamp(2.5rem, 5vw, 4.5rem);
  }

  .page-head__glow {
    position: absolute;
    top: 0;
    right: 0;
    z-index: -1;
    width: min(62rem, 100%);
    height: min(36rem, 90%);
    background:
      radial-gradient(closest-side at 72% 32%, rgb(192 17 215 / 0.32), transparent),
      radial-gradient(closest-side at 92% 12%, rgb(255 118 164 / 0.28), transparent),
      radial-gradient(closest-side at 46% 4%, rgb(47 60 190 / 0.4), transparent);
    filter: blur(28px);
    pointer-events: none;
    animation: drift 20s ease-in-out infinite alternate;
  }

  .page-head__kicker {
    margin-bottom: 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--pink-text);
  }

  /* long German compounds don't fit on phones otherwise */
  .page-head__title,
  .project-head__title {
    hyphens: auto;
  }

  .page-head__title {
    max-width: 16ch;
    font-size: var(--step-5);
    letter-spacing: -0.045em;
    line-height: 0.98;
  }

  .page-head__lead {
    max-width: 56ch;
    margin-top: 1.25rem;
    font-size: var(--step-1);
    color: var(--muted);
  }

  /* Footer */
  .site-footer {
    padding-block: clamp(3rem, 6vw, 5rem) calc(2rem + env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
    background: linear-gradient(180deg, transparent, rgb(47 60 190 / 0.07));
    font-size: 0.95rem;

    & ul {
      display: grid;
      gap: 0.35rem;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    & a {
      display: inline-block;
      padding-block: 0.2rem;
      color: var(--muted);
      text-decoration: none;
      overflow-wrap: anywhere;
      transition: color 0.2s;

      &:hover {
        color: var(--text);
      }
    }
  }

  .site-footer__grid {
    display: grid;
    gap: 2.25rem;

    @media (min-width: 40em) {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    @media (min-width: 60em) {
      grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr);
    }
  }

  .site-footer__intro {
    @media (min-width: 40em) and (max-width: 59.99em) {
      grid-column: 1 / -1;
    }
  }

  .site-footer .brand {
    display: inline-flex;
    padding: 0;
    color: var(--text);
  }

  .site-footer__heading {
    margin-bottom: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--faint);
  }

  .site-footer__bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1.5rem;
    margin-top: clamp(2.5rem, 5vw, 4rem);
    padding-top: 1.5rem;
    border-top: 1px solid var(--line);
    font-size: 0.875rem;
    color: var(--faint);
  }
}