@media (max-width: 980px) {
  .intro-grid {
    gap: 48px;
  }

  .pr-link {
    grid-template-columns: 64px minmax(0, 1fr) 78px;
    gap: 13px;
  }
}

@media (max-width: 840px) {
  .header-inner {
    gap: 14px;
  }

  .menu-toggle {
    display: block;
    margin-left: 0;
  }

  .header-mail {
    display: none;
  }

  .language-switch {
    margin-left: auto;
  }

  .site-nav {
    position: absolute;
    top: 66px;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 8px var(--gutter) 15px;
    border-bottom: 1px solid var(--line-strong);
    background: #f8f9f6;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    min-height: 44px;
    padding: 0 3px;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
  }

  .site-nav a::after {
    display: none;
  }

  .site-nav a[aria-current="page"] {
    color: var(--accent);
  }

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .identity {
    display: grid;
    gap: 0;
  }

  .identity-head {
    display: grid;
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 22px;
    align-items: center;
  }

  .identity-avatar {
    width: 112px;
    height: 112px;
  }

  .identity-name h1 {
    margin-top: 0;
  }

  .identity-role {
    margin-top: 9px;
  }

  .identity-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 17px 28px;
    margin-top: 24px;
    padding-top: 18px;
  }

  .intro-content {
    padding-top: 0;
  }

  .intro-lead {
    max-width: 25em;
  }

  .page-lede {
    max-width: 47em;
  }

  .learning-topic {
    grid-template-columns: minmax(135px, 0.68fr) minmax(0, 1.8fr);
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 18px;
  }

  .site-header,
  .header-inner {
    min-height: 60px;
  }

  .brand-name {
    font-size: 14px;
  }

  .site-nav {
    top: 60px;
  }

  .intro {
    padding-top: 36px;
    padding-bottom: 48px;
  }

  .identity-head {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 19px;
  }

  .identity-avatar {
    width: 92px;
    height: 92px;
  }

  .identity-name h1 {
    font-size: 2rem;
  }

  .identity-facts {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 21px;
  }

  .intro-lead {
    margin-bottom: 23px;
    font-size: 1.48rem;
    line-height: 1.52;
  }

  .intro-copy p {
    font-size: 15.2px;
    line-height: 1.83;
  }

  .contact-invitation {
    margin-top: 25px;
    padding-top: 20px;
  }

  .contact-invitation > p {
    font-size: 14.5px;
  }

  .contact-list {
    display: grid;
    gap: 9px;
    font-size: 13px;
  }

  .contact-list li {
    flex-wrap: wrap;
  }

  .contact-label {
    flex: 0 0 40px;
  }

  .page-hero {
    padding-top: 34px;
    padding-bottom: 32px;
  }

  .page-content {
    padding-top: 46px;
    padding-bottom: 54px;
  }

  .explore-grid {
    grid-template-columns: 1fr;
  }

  .explore-grid li:nth-child(odd) {
    border-right: 0;
  }

  .explore-card {
    padding-right: 0;
  }

  .explore-grid li:nth-child(even) .explore-card {
    padding-left: 0;
  }

  .record-summary {
    gap: 11px 22px;
    margin-bottom: 22px;
  }

  .record-summary > p {
    flex-basis: 100%;
  }

  .contribution-group summary {
    gap: 12px;
    padding: 18px 0 18px 14px;
  }

  .contribution-group summary::before {
    top: 15px;
    bottom: 15px;
  }

  .group-title {
    font-size: 15.5px;
  }

  .group-repos {
    font-size: 10.5px;
  }

  .group-meta {
    gap: 9px;
    font-size: 11px;
  }

  .disclosure {
    width: 21px;
    height: 21px;
  }

  .group-body {
    padding: 0 0 23px 14px;
  }

  .group-description {
    font-size: 14px;
  }

  .pr-link {
    grid-template-columns: 55px minmax(0, 1fr);
    gap: 5px 10px;
    padding: 10px 0 11px;
  }

  .pr-date {
    grid-column: 2;
    text-align: left;
    font-size: 11px;
  }

  .pr-title {
    font-size: 13.2px;
  }

  .project {
    padding-top: 24px;
    padding-bottom: 27px;
  }

  .project-head h3 {
    font-size: 1.24rem;
  }

  .project-description {
    font-size: 14px;
  }

  .project-preview {
    margin-top: 18px;
  }

  .learning-topic {
    grid-template-columns: 1fr;
    gap: 7px;
    padding: 17px 0 19px;
  }

  .learning-topic p {
    font-size: 13.5px;
  }

  .closing-contact {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-inner {
    display: grid;
  }
}

@media (max-width: 380px) {
  .brand-name {
    display: none;
  }

  .identity-head {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 15px;
  }

  .identity-avatar {
    width: 78px;
    height: 78px;
  }

  .identity-name h1 {
    font-size: 1.8rem;
  }

  .group-meta > span:first-child {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  .site-header,
  .skip-link,
  .copy-button,
  .closing-contact,
  .footer-links,
  .explore {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 11pt;
  }

  .intro,
  .page-hero,
  .page-content {
    padding: 24pt 0;
  }

  .intro-grid {
    display: block;
  }

  .page-content .container {
    width: 100%;
  }

  .contribution-group {
    break-inside: avoid;
  }

  a {
    color: inherit;
  }
}