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

.wrap--narrow { max-width: var(--wrap-narrow); }

.section {
  position: relative;
  padding-block: var(--section-y);
  background: var(--paper);
}

.section--wide { padding-block: var(--section-y-wide); }

.section--tint  { background: var(--paper-2); }
.section--ruled { border-top: 1px solid var(--line); }

.head { margin-bottom: clamp(2rem, 1.2rem + 2.6vw, 3.5rem); }

.head h2 { max-width: 20ch; }

.head p {
  margin-top: var(--s-4);
  max-width: 52ch;
  color: var(--ink-2);
  font-size: var(--step-1);
  line-height: 1.55;
}

.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background var(--t-med) var(--ease),
              border-color var(--t-med) var(--ease);
}

.header.is-stuck {
  background: #f5f3ef;
  border-bottom-color: var(--line);
}

.header__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--logo-h) * 0.2);
  text-decoration: none;
  font-size: calc(var(--logo-h) * 0.646);
  letter-spacing: -0.025em;
  line-height: 1;
  color: var(--ink);
  flex: none;
}

.logo:hover { color: var(--ink); }

.logo__mark { width: var(--logo-h); height: var(--logo-h); flex: none; }

.logo__text { font-weight: 600; }
.logo__text span { font-weight: 400; color: var(--ink-3); }

.nav { display: none; }

@media (min-width: 900px) {
  .nav { display: flex; align-items: center; gap: 1.5rem; margin-left: auto; }
}

.nav__link {
  position: relative;
  padding-block: 0.3rem;
  font-size: 0.95rem;
  color: var(--ink-2);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-med) var(--ease);
}

.nav__link:hover { color: var(--ink); }
.nav__link:hover::after { transform: scaleX(1); }

.nav__link[aria-current="true"] { color: var(--ink); }
.nav__link[aria-current="true"]::after { transform: scaleX(1); background: var(--accent); }

.header__actions { display: flex; align-items: center; gap: 0.75rem; flex: none; }

.burger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-right: -10px;
  cursor: pointer;
  color: var(--ink);
}

@media (min-width: 900px) { .burger { display: none; } }

.burger__box { display: block; width: 20px; height: 11px; position: relative; }

.burger__box span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--t-med) var(--ease);
}

.burger__box span:nth-child(1) { top: 0; }
.burger__box span:nth-child(2) { bottom: 0; }

.burger[aria-expanded="true"] .burger__box span:nth-child(1) { transform: translateY(4.75px) rotate(45deg); }
.burger[aria-expanded="true"] .burger__box span:nth-child(2) { transform: translateY(-4.75px) rotate(-45deg); }

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--s-6);
  padding: calc(var(--header-h) + var(--s-5)) var(--gutter) var(--s-7);
  background: var(--paper);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-med) var(--ease), visibility var(--t-med);
}

.mobile-nav.is-open { opacity: 1; visibility: visible; }

@media (min-width: 900px) { .mobile-nav { display: none; } }

.mobile-nav__list { list-style: none; padding: 0; margin: 0; }
.mobile-nav__list li + li { border-top: 1px solid var(--line); }

.mobile-nav__link {
  display: block;
  padding: 1.05rem 0;
  font-size: var(--step-3);
  font-weight: 500;
  letter-spacing: var(--tracking-tight);
  text-decoration: none;
  color: var(--ink);
}

.mobile-nav__foot { display: grid; gap: var(--s-4); }

.mobile-nav__meta {
  display: grid;
  gap: 0.35rem;
  font-size: var(--step--1);
  color: var(--ink-3);
}

.mobile-nav__meta a { color: var(--ink-2); }

body.is-locked { overflow: hidden; }

.footer {
  background: var(--dark-field);
  color: var(--ink-inv);
  padding-block: clamp(3rem, 2rem + 4vw, 4.5rem) var(--s-6);
}

.footer__grid {
  display: grid;
  gap: var(--s-6);
  padding-bottom: var(--s-6);
  border-bottom: 1px solid var(--line-inv);
}

@media (min-width: 700px) {
  .footer__grid { grid-template-columns: 1.9fr 1fr 1.1fr; column-gap: var(--s-7); }
}

.footer__brand { display: grid; gap: var(--s-4); align-content: start; max-width: 36ch; }
.footer__brand .logo { color: var(--ink-inv); --logo-h: var(--logo-h-footer); }
.footer__brand .logo__text span { color: var(--ink-inv-2); }

.footer__tagline { color: var(--ink-inv-2); font-size: var(--step--1); line-height: 1.65; }

.footer__title {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-inv-3);
  margin-bottom: var(--s-4);
}

.footer__list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.55rem; }

.footer__list a {
  color: var(--ink-inv-2);
  font-size: var(--step--1);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

.footer__list a:hover { color: var(--ink-inv); }
.footer__list a:focus-visible { outline-color: #8fb7ff; }

.footer__legal-info {
  padding-top: var(--s-5);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--ink-inv-3);
}


.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3) var(--s-5);
  align-items: center;
  justify-content: space-between;
  padding-top: var(--s-4);
  margin-top: var(--s-4);
  border-top: 1px solid var(--line-inv);
  font-size: 0.82rem;
  color: var(--ink-inv-3);
}

.footer__legal { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5); }
.footer__legal a { color: var(--ink-inv-3); text-decoration: none; }
.footer__legal a:hover { color: var(--ink-inv); }
.footer__legal a:focus-visible { outline-color: #8fb7ff; }