/* Shared responsive system for the portfolio */
:root {
  --site-gutter: clamp(18px, 3.5vw, 56px);
  --section-space: clamp(72px, 8vw, 112px);
  --content-max: 1240px;
  --reading-max: 760px;
  --tap-size: 44px;
}

html {
  overflow-x: clip;
  scroll-padding-top: 92px;
}

body {
  overflow-x: clip;
}

img,
svg,
video {
  max-width: 100%;
}

:where(.shell, .reading-shell) {
  width: min(calc(100% - (2 * var(--site-gutter))), var(--content-max));
  margin-inline: auto;
}

.reading-shell {
  max-width: var(--reading-max);
}

:where(h1, h2, h3, p, ul, ol, blockquote) {
  overflow-wrap: break-word;
}

:where(a, button, input, select, textarea):focus-visible {
  outline: 3px solid var(--green, var(--accent, #294541));
  outline-offset: 4px;
}

:where(nav a, .button, .back-link, .work-section-cta a, .insight-row > a, .credential-profile-link) {
  min-height: var(--tap-size);
}

:where(nav a, .button, .back-link, .work-section-cta a, .insight-row > a) {
  display: inline-flex;
  align-items: center;
}

.nav {
  min-height: clamp(64px, 5vw, 78px);
  flex-wrap: wrap;
}

.nav nav {
  align-items: center;
}

.nav nav a[aria-current="page"] {
  color: var(--ink, var(--accent, #1e2a2b));
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 5px;
}

main section {
  padding-block: var(--section-space);
}

.hero {
  min-height: min(760px, calc(100svh - 83px));
}

.hero-grid,
.section-grid,
.intro-strip,
.contact-strip,
.work-grid {
  min-width: 0;
}

.hero-grid > *,
.section-grid > *,
.intro-strip > *,
.contact-strip > *,
.work-grid > * {
  min-width: 0;
}

.hero-visual {
  width: 100%;
  min-height: clamp(320px, 35vw, 480px);
  overflow: clip;
}

.signal-card {
  max-width: calc(100% - 16px);
}

.work-card {
  min-height: auto;
}

.work-card .diagram,
.work-card .people-visual {
  min-height: 180px;
  height: auto;
}

.proof-item,
.insight-row,
.capability,
.personal-card,
.principle,
.evidence {
  min-width: 0;
}

.insight-row h3,
.work-card h3,
.capability h3,
.personal-card h3 {
  overflow-wrap: anywhere;
}

.footer-note {
  max-width: 760px;
}

@media (max-width: 1020px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(280px, .8fr);
    gap: clamp(36px, 5vw, 60px);
  }

  .work-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .work-card:nth-child(3) {
    grid-column: 1 / -1;
  }

  .section-head {
    gap: 28px;
  }

  .section-grid {
    grid-template-columns: minmax(150px, .45fr) minmax(0, 1.55fr);
    gap: clamp(32px, 5vw, 58px);
  }

  .evidence-grid,
  .personal-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 840px) {
  :root {
    --section-space: clamp(64px, 9vw, 84px);
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .intro-strip,
  .contact-strip,
  .section-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 36px;
  }

  .hero-aside {
    margin-top: 0;
  }

  .hero-visual {
    min-height: 380px;
    margin-top: 2px;
  }

  .section-grid > .section-label {
    padding-top: 0;
    margin-bottom: -10px;
  }

  .proof-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .proof-item:nth-child(2) {
    border-right: 0;
  }

  .proof-item:nth-child(3),
  .proof-item:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .proof-item:nth-child(3) {
    padding-left: 0;
  }

  .section-head {
    display: block;
    margin-bottom: 34px;
  }

  .section-head > p {
    margin-top: 16px;
  }

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

  .work-card:nth-child(3) {
    grid-column: auto;
  }

  .insight-row {
    grid-template-columns: minmax(94px, 116px) minmax(0, 1fr);
    gap: 16px;
  }

  .insight-row > a {
    grid-column: 2;
  }

  .capability {
    grid-template-columns: 45px minmax(0, 1fr);
  }

  .capability-tag {
    grid-column: 2;
    text-align: left;
  }

  .career-note {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .article-hero {
    padding-block: clamp(56px, 8vw, 72px);
  }

  .article-body {
    padding-block: clamp(54px, 8vw, 78px);
  }

  .article-footer-inner {
    align-items: flex-start;
  }
}

@media (max-width: 680px) {
  .nav {
    display: flex;
    align-items: center;
    padding-block: 14px;
    gap: 10px 18px;
  }

  .brand {
    flex: 1 1 100%;
  }

  .nav nav {
    width: 100%;
    justify-content: flex-start;
    gap: 4px 16px;
  }

  h1 {
    font-size: clamp(3rem, 13vw, 4.4rem);
    line-height: .92;
  }

  h2 {
    font-size: clamp(2.35rem, 10vw, 4rem);
  }

  .hero-copy,
  .lead,
  .site-note {
    font-size: 1rem;
  }

  .evidence-grid,
  .personal-grid {
    grid-template-columns: 1fr;
  }

  .personal-card {
    min-height: auto;
  }

  .personal-card h3 {
    margin-top: 34px;
  }

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

  .credential-profile-link {
    width: 100%;
  }

  .article-footer-inner {
    display: block;
  }

  .article-footer .button {
    margin-top: 24px;
  }

  .site-footer-row,
  .footer-row {
    display: block;
  }

  .site-footer-row span + span,
  .footer-row span + span {
    display: block;
    margin-top: 8px;
  }

  .footer-note {
    font-size: .76rem;
  }
}

@media (max-width: 600px) {
  .hero-visual {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    min-height: auto;
    margin-top: 0;
    overflow: visible;
  }

  .hero-visual::before,
  .signal-line {
    display: none;
  }

  .signal-card,
  .signal-card.one,
  .signal-card.two,
  .signal-card.three {
    position: relative;
    inset: auto;
    width: auto;
    max-width: none;
    min-height: 132px;
    transform: none;
  }

  .signal-card.three {
    grid-column: 1 / -1;
  }

  .signal-card strong {
    max-width: none;
    font-size: 1.25rem;
  }

  .signal-card.three strong {
    font-size: 1.45rem;
  }

  .insight-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .insight-row > a {
    grid-column: auto;
  }

  .button {
    width: 100%;
    justify-content: center;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .article-meta {
    gap: 6px 12px;
  }

  .article-body p,
  .article-body li {
    font-size: 1rem;
  }
}

@media (max-width: 420px) {
  :root {
    --site-gutter: 18px;
  }

  .proof-strip {
    grid-template-columns: 1fr;
  }

  .proof-item,
  .proof-item + .proof-item {
    padding: 16px 0;
    border-right: 0;
    border-top: 1px solid var(--line);
  }

  .proof-item:first-child {
    border-top: 0;
  }

  .proof-item span {
    max-width: none;
  }

  .signal-card {
    padding: 16px;
  }

  .article-hero h1 {
    font-size: 2.45rem;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }

  .button:hover,
  .credential-profile-link:hover {
    transform: none;
  }
}