/* ========== STRUCTURE AND RESET ========== */

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 24px;
}

body {
  margin: 0;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

button,
input,
select {
  font: inherit;
}

a {
  text-underline-offset: 5px;
}

[hidden] {
  display: none !important;
}

.shell {
  width: min(1240px, calc(100% - 96px));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 20;
  padding: 14px 20px;
}

.skip-link:focus {
  top: 12px;
}

/* ========== MASTHEAD ========== */

.masthead {
  display: flex;
  min-height: 128px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand img {
  width: 80px;
  height: 80px;
}

.brand strong,
.brand small {
  display: block;
}

.masthead nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.masthead nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 16px;
  text-decoration: none;
}

.menu-button {
  display: none;
  min-height: 44px;
  padding: 8px 16px;
}

/* ========== PUBLIC PAGE LAYOUT ========== */

.hero {
  display: grid;
  grid-template-columns: 1.12fr 1fr;
  align-items: center;
  gap: 64px;
  padding-block: 72px 80px;
}

.hero h1 {
  margin: 20px 0 28px;
}

.hero .lead {
  max-width: 49ch;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 26px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 13px 22px;
  text-decoration: none;
}

.text-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 14px;
}

.brand-art {
  margin: 0;
}

.brand-art img {
  width: 100%;
}

.brand-art figcaption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding-top: 18px;
}

.principles-strip .shell {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px 32px;
  padding-block: 20px;
}

.section {
  padding-block: 80px;
}

.purpose-grid,
.editorial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  margin-bottom: 40px;
}

.section-heading h2 {
  margin-bottom: 0;
}

.three-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px;
}

.work-columns article {
  padding-top: 24px;
}

.work-columns h3 {
  margin-block: 24px 18px;
}

.correspondence {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 72px;
  margin-bottom: 88px;
  padding: 48px;
}

.correspondence p {
  max-width: 49ch;
}

.workspace-door {
  padding-left: 48px;
}

.access-note {
  display: block;
  margin-top: 12px;
}

.page-intro {
  padding-block: 64px 56px;
}

.page-intro h1 {
  max-width: 20ch;
  margin-block: 20px 24px;
}

.page-intro .lead {
  max-width: 62ch;
}

.reading-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(220px, 1fr);
  align-items: start;
  gap: 100px;
  padding-block: 48px 88px;
}

.prose {
  max-width: 70ch;
}

.prose h2 {
  margin-top: 44px;
}

.prose > h2:first-child {
  margin-top: 0;
}

.reading-aside {
  padding-top: 20px;
}

.editor-note {
  margin-top: 48px;
  padding-top: 4px;
}

summary {
  min-height: 44px;
  padding-block: 12px;
  cursor: pointer;
}

.contact-block {
  padding: 28px;
}

.email-link {
  overflow-wrap: anywhere;
}

.error-actions {
  padding-bottom: 80px;
}

/* ========== FOOTER ========== */

.site-footer {
  padding-top: 56px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-grid a {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 12px;
  width: fit-content;
}

.footer-bottom,
.footer-bottom > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.footer-bottom {
  padding-block: 16px;
}

.footer-bottom a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

/* ========== RESPONSIVE LAYOUT ========== */

@media (max-width: 1150px) {
  .shell {
    width: calc(100% - 64px);
  }

  .masthead nav {
    gap: 14px;
  }

  .brand {
    gap: 8px;
  }

  .hero {
    gap: 36px;
  }

  .purpose-grid,
  .editorial-grid,
  .reading-layout {
    gap: 48px;
  }
}

@media (max-width: 960px) {
  .masthead {
    flex-wrap: wrap;
    min-height: 112px;
    gap: 0 16px;
    padding-block: 12px;
  }

  .masthead nav {
    flex-basis: 100%;
    flex-wrap: wrap;
    gap: 12px 24px;
    padding-block: 12px;
  }

  .has-js .menu-button {
    display: block;
  }

  .has-js .masthead nav:not(.is-open) {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-block: 48px;
  }

  .brand-art {
    max-width: 600px;
  }

  .purpose-grid,
  .editorial-grid,
  .reading-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .three-columns {
    gap: 24px;
  }

  .correspondence {
    gap: 28px;
    padding: 32px;
  }

  .workspace-door {
    padding-left: 28px;
  }

  .reading-aside {
    margin-top: 24px;
  }
}

@media (max-width: 640px) {
  .shell {
    width: calc(100% - 40px);
  }

  .brand img {
    width: 80px;
    height: 80px;
  }

  .brand {
    gap: 4px;
  }

  .masthead {
    gap: 0 8px;
  }

  .menu-button {
    padding-inline: 10px;
  }

  .masthead nav {
    align-items: stretch;
    flex-direction: column;
    gap: 0;
  }

  .hero,
  .section,
  .page-intro {
    padding-block: 40px;
  }

  .hero {
    gap: 36px;
  }

  .principles-strip .shell {
    flex-direction: column;
    gap: 8px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
  }

  .three-columns,
  .correspondence,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .work-columns article {
    padding-top: 20px;
  }

  .correspondence {
    padding: 24px;
    margin-bottom: 48px;
  }

  .workspace-door {
    padding: 28px 0 0;
  }

  .footer-grid {
    gap: 24px;
  }

  .reading-layout {
    padding-block: 32px 48px;
  }
}