:root {
  --color-bg: #f7f9fc;
  --color-surface: #ffffff;
  --color-accent: #2563eb;
  --color-accent-muted: #3b82f6;
  --color-text: #1f2933;
  --color-text-muted: #52606d;
  --color-border: rgba(15, 23, 42, 0.1);
  --shadow-soft: 0 14px 38px rgba(15, 23, 42, 0.08);
  --shadow-subtle: 0 6px 24px rgba(15, 23, 42, 0.05);
  --font-sans: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 220ms cubic-bezier(0.215, 0.61, 0.355, 1);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 1.5rem 0.5rem;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1320px;
  margin: 0 auto;
}

.nav__brand {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
}

.nav__links {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.nav__link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-text);
  background: rgba(37, 99, 235, 0.12);
  box-shadow: var(--shadow-subtle);
  outline: none;
}

.nav__link--active {
  color: var(--color-text);
  background: rgba(37, 99, 235, 0.12);
  box-shadow: var(--shadow-subtle);
}

.main {
  flex: 1;
  padding: 2.5rem 1.5rem 4rem;
  max-width: 1320px;
  width: 100%;
  margin: 0 auto;
}

.intro {
  background: var(--color-surface);
  border-radius: 20px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  padding: 2.75rem;
  display: grid;
  gap: 2rem;
}

.intro__layout {
  display: grid;
  grid-template-columns: minmax(220px, 260px) 1fr;
  gap: 2.5rem;
  align-items: start;
}

.intro__headshot {
  background: #f8fafc;
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.intro__headshot img {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 3 / 4;
  border-radius: 16px;
  object-fit: cover;
  background: linear-gradient(135deg, #e0e7ff 0%, #f1f5f9 100%);
}


.intro__text {
  display: grid;
  gap: 1.1rem;
}

.intro__title {
  margin: 0;
  font-size: clamp(1.9rem, 3vw, 2.4rem);
  line-height: 1.2;
}

.intro__bio {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.intro__list {
  margin: 0;
  padding-left: 1.35rem;
  color: var(--color-text-muted);
  font-size: 1.02rem;
  display: grid;
  gap: 0.75rem;
}

.intro__list li {
  line-height: 1.55;
}




.intro__education {
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  padding-top: 1.25rem;
  margin-top: 1.25rem;
}

.intro__education-title {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.intro__edu-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.intro__edu-list li {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding-left: 1rem;
  border-left: 2px solid rgba(37, 99, 235, 0.3);
}

.edu-degree {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text);
}

.edu-focus {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.edu-meta {
  font-size: 0.83rem;
  color: var(--color-accent);
  font-weight: 600;
}

.intro__projects {
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  padding-top: 1.5rem;
}

.intro__projects h3 {
  margin: 0 0 0.75rem;
  color: var(--color-text);
}

.intro__project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.intro__project-tag {
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--color-accent);
  padding: 0.55rem 1.2rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-block;
  text-decoration: none;
  transition: transform var(--transition), background var(--transition), border var(--transition);
}

.intro__project-tag:hover,
.intro__project-tag:focus-visible {
  transform: translateY(-2px);
  background: rgba(37, 99, 235, 0.2);
  border-color: var(--color-accent);
  outline: none;
}

.intro__project-tag[aria-pressed="true"] {
  background: rgba(37, 99, 235, 0.25);
  border-color: var(--color-accent);
  color: var(--color-text);
}

.pillars {
  margin-top: 3rem;
}

.pillars h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.pillars__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.pillar-card {
  background: var(--color-surface);
  border-radius: 20px;
  padding: 1.85rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-subtle);
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.pillar-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
}

.pillar-card p {
  color: var(--color-text-muted);
  margin: 0 0 1.1rem;
}

.pillar-card__action {
  font-weight: 600;
  color: var(--color-accent);
}

.pillar-card:hover,
.pillar-card:focus-visible {
  transform: translateY(-6px);
  border-color: var(--color-accent);
  box-shadow: 0 20px 36px rgba(37, 99, 235, 0.12);
  outline: none;
}

.pillar-card[aria-selected="true"] {
  border-color: var(--color-accent);
  box-shadow: 0 16px 30px rgba(37, 99, 235, 0.16);
}

.details {
  margin-top: 3rem;
  padding: 2.75rem;
  background: var(--color-surface);
  border-radius: 24px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.details__header h2 {
  margin: 0;
  font-size: 1.8rem;
}

.details__subtitle {
  color: var(--color-text-muted);
  margin: 0.35rem 0 2rem;
}

.details__content {
  display: grid;
  gap: 1.25rem;
  /* keep stacked strips: subprojects (top), summary (middle), visual (bottom) */
  grid-template-columns: 1fr;
}

.details__summary,
.details__visual {
  background: rgba(248, 250, 255, 0.7);
  border-radius: 18px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  padding: 1.75rem;
  box-shadow: var(--shadow-subtle);
}

.details__summary h3,
.details__visual h3 {
  margin: 0;
}

.details__metrics {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 0;
}

.details__subproject {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: 14px;
  background: rgba(37, 99, 235, 0.08);
}

.details__subproject-title {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.details__subproject-summary {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.96rem;
}

.details__metrics dt {
  font-weight: 600;
  color: var(--color-accent);
}

.details__metrics dd {
  margin: 0;
  color: var(--color-text-muted);
}

.workflow {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  min-height: 150px;
}

.workflow__step {
  position: relative;
  padding: 1.15rem 1rem;
  border-radius: 14px;
  border: 1px solid rgba(37, 99, 235, 0.2);
  background: rgba(37, 99, 235, 0.1);
  flex: 1 1 180px;
  min-width: 160px;
  text-align: center;
  transition: transform var(--transition), background var(--transition);
}

.workflow__step::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -0.65rem;
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: translateY(-50%) rotate(-45deg);
  opacity: 0.65;
}

.workflow__step:last-child::after {
  display: none;
}

.workflow__step strong {
  display: block;
  margin-bottom: 0.25rem;
}

.workflow__step span {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.workflow__step:hover {
  transform: translateY(-3px);
  background: rgba(37, 99, 235, 0.18);
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.visual-item {
  background: var(--color-surface);
  border-radius: 18px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  padding: 1.25rem;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.visual-item figcaption {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.92rem;
  text-align: center;
}

.visual-item--text {
  align-items: flex-start;
  gap: 0.65rem;
}

.visual-item--text figcaption {
  text-align: left;
}

.visual-step {
  font-weight: 700;
  color: var(--color-accent);
}

.visual-media {
  width: 100%;
  border-radius: 16px;
  object-fit: cover;
}

.visual-placeholder {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* visually-hidden utility */
.visually-hidden {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
  border: 0; padding: 0; margin: -1px;
}

/* visual grid cross-fade */
.visual-grid {
  position: relative;
  min-height: 80px;
  transition: opacity 280ms var(--transition), transform 280ms var(--transition);
  opacity: 0;
}
.visual-grid.is-visible {
  opacity: 1;
}
.visual-grid .visual-item {
  transition: opacity 320ms var(--transition), transform 320ms var(--transition);
}

/* Certifications section */
.certifications {
  margin-top: 3rem;
  padding: 2.25rem 1.5rem 2.5rem;
  background: var(--color-surface);
  border-radius: 16px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-subtle);
}

.certifications--standalone {
  margin-top: 0;
  border-radius: 0;
  border-left: none;
  border-right: none;
  border-top: none;
  box-shadow: none;
  min-height: calc(100vh - 80px);
}
.certifications__inner {
  max-width: 1100px;
  margin: 0 auto;
}
.certifications h2 {
  margin: 0 0 0.5rem;
  color: var(--color-text);
}
.certifications__intro {
  margin: 0 0 1.25rem;
  color: var(--color-text-muted);
}
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.cert-card {
  background: var(--color-surface);
  border: 1px solid rgba(15,23,42,0.06);
  border-radius: 12px;
  padding: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: stretch;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}
.cert-card:focus,
.cert-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-subtle); outline: none; }
.cert-thumb { width: 100%; height: 140px; object-fit: cover; border-radius: 8px; }
.cert-caption { font-size: 0.95rem; color: var(--color-text-muted); margin: 0.25rem 0 0; }

/* Lightbox */
.cert-lightbox {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  z-index: 1200; pointer-events: none;
}
.cert-lightbox__backdrop {
  position: absolute; inset: 0; background: rgba(2,6,23,0.6);
}
.cert-lightbox[hidden] { display: none; }
.cert-lightbox__panel {
  position: relative; background: var(--color-surface); border-radius: 12px; padding: 1rem; max-width: 1100px; width: calc(100% - 40px); box-shadow: 0 30px 80px rgba(2,6,23,0.5); display:flex; align-items:center; gap: 12px; pointer-events: auto;
}
.cert-lightbox__content { flex: 1 1 auto; text-align: center; }
.cert-lightbox__img { max-width: 100%; max-height: 70vh; border-radius: 8px; display:block; margin: 0 auto; }
.cert-lightbox__caption { margin-top: 0.5rem; color: var(--color-text-muted); }
.cert-lightbox__close { position: absolute; top: 8px; right: 8px; background: none; border: none; font-size: 1.25rem; cursor: pointer; }
.cert-lightbox__nav { background: none; border: none; font-size: 2.25rem; line-height:1; cursor:pointer; padding: 0 6px; color: var(--color-text); }
.cert-lightbox__prev { margin-left: 6px; }
.cert-lightbox__next { margin-right: 6px; }

@media (max-width: 720px) {
  .cert-lightbox__panel { flex-direction: column; max-height: 90vh; overflow: auto; }
  .cert-thumb { height: 160px; }
}

.details__subprojects {
  padding: 0.75rem 0.25rem 0;
}

.subproject-list {
  /* Grid of subproject cards laid out in columns that wrap responsively */
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 0.75rem;
  padding-bottom: 0.5rem;
}

.subproject-list .subproject-card {
  /* let the card size to the grid cell and stretch vertically */
  flex: none;
  width: 100%;
}

/* Subproject card compact layout with thumbnail */
.subproject-card {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.subproject-thumb {
  width: 140px;
  height: auto;
  aspect-ratio: 4 / 3;
  max-height: 110px;
  border-radius: 10px;
  object-fit: cover;
  flex-shrink: 0;
  background: linear-gradient(135deg, #eef2ff 0%, #f8fafc 100%);
  box-shadow: 0 6px 18px rgba(15,23,42,0.06);
}

.subproject-card__meta {
  display: -webkit-box;
  line-clamp: 3;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 520px) {
  .subproject-card {
    flex-direction: column;
    align-items: stretch;
  }
  .subproject-thumb {
    width: 100%;
    height: 160px;
    aspect-ratio: 16 / 9;
    max-height: none;
    border-radius: 12px;
  }
}

/* entrance animations */
.subproject-card {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 320ms var(--transition), transform 320ms var(--transition);
}
.subproject-card.appear {
  opacity: 1;
  transform: none;
}

/* details panels fade */
.details__summary,
.details__visual {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 280ms var(--transition), transform 280ms var(--transition);
}
.details__summary.is-visible,
.details__visual.is-visible {
  opacity: 1;
  transform: none;
}

.subproject-card {
  background: var(--color-surface);
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 14px;
  padding: 1.1rem 1.3rem;
  transition: transform var(--transition), border var(--transition), box-shadow var(--transition);
}

.subproject-card[aria-selected="true"] {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.subproject-card:hover,
.subproject-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-subtle);
  outline: none;
}

.subproject-card__title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.subproject-card__meta {
  margin: 0 0 0.75rem;
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

.subproject-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  font-size: 0.9rem;
}

.subproject-card__link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}

.subproject-card__link:hover,
.subproject-card__link:focus-visible {
  text-decoration: underline;
  outline: none;
}

.subproject-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.subproject-card__tag {
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.25);
  border-radius: 999px;
  padding: 0.2rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-accent);
}

.details__subproject-tags {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.details__subproject-tag {
  background: rgba(37, 99, 235, 0.18);
  border-radius: 999px;
  padding: 0.25rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
}

/* Code snippet inside project snapshot */
.details__subproject-code {
  margin-top: 0.85rem;
}
.details__subproject-code pre {
  background: rgba(12,17,28,0.04);
  padding: 0.8rem;
  border-radius: 8px;
  overflow: auto;
  max-height: 220px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, 'Roboto Mono', 'Courier New', monospace;
  font-size: 0.92rem;
  line-height: 1.35;
  margin: 0;
}

.workflow img.visual-media {
  max-width: 100%;
  border-radius: 16px;
  box-shadow: var(--shadow-subtle);
}

.subproject-empty {
  margin: 0;
  color: var(--color-text-muted);
  font-style: italic;
}

.publications {
  padding: 3.5rem 1.5rem 4rem;
  background: linear-gradient(180deg, rgba(247, 249, 252, 0) 0%, rgba(247, 249, 252, 1) 100%);
  border-top: 1px solid var(--color-border);
}

.publications--standalone {
  border-top: none;
}

/* Selected publications highlight section */
.selected-pubs {
  padding: 3rem 1.5rem 2.5rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.selected-pubs__inner {
  max-width: 1100px;
  margin: 0 auto;
}

.selected-pubs__inner h2 {
  color: var(--color-text);
  font-size: 2rem;
  margin: 0 0 1.75rem;
}

.selected-pubs__grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sel-pub-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
  display: flex;
  flex-direction: row;
  transition: transform var(--transition), box-shadow var(--transition);
}

.sel-pub-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.sel-pub-card__visual {
  margin: 0;
  width: 260px;
  flex-shrink: 0;
  background: #f0f4f8;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.sel-pub-card__visual img {
  width: 100%;
  height: 210px;
  object-fit: contain;
  display: block;
}

.sel-pub-card__body {
  padding: 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
  border-left: 1px solid var(--color-border);
}

.sel-pub-card__venue {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.sel-pub-card__title {
  margin: 0.1rem 0 0;
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--color-text);
}

.sel-pub-card__desc {
  margin: 0.35rem 0 0;
  font-size: 0.93rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.sel-pub-card__findings {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.3rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  flex: 1;
}

.sel-pub-card__links {
  margin-top: 1rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.sel-pub-card__link {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}

.sel-pub-card__link:hover,
.sel-pub-card__link:focus-visible {
  text-decoration: underline;
  outline: none;
}

@media (max-width: 720px) {
  .sel-pub-card {
    flex-direction: column;
  }
  .sel-pub-card__visual {
    width: 100%;
    padding: 1rem;
  }
  .sel-pub-card__visual img {
    height: 180px;
  }
  .sel-pub-card__body {
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding: 1.25rem 1.4rem;
  }
}

.publications__content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  color: var(--color-text-muted);
}

.publications__content h2 {
  color: var(--color-text);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.publications__scholar {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.25rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

.publications__scholar:hover,
.publications__scholar:focus-visible {
  color: var(--color-accent-muted);
  outline: none;
}

.publications__group {
  margin-top: 2.5rem;
  text-align: left;
}

.publications__group:first-of-type {
  margin-top: 1.75rem;
}

.publications__group h3 {
  margin: 0 0 1rem;
  color: var(--color-text);
  font-size: 1.3rem;
}

.pub-year {
  margin-top: 1.75rem;
}

.pub-year:first-of-type {
  margin-top: 0.75rem;
}

.pub-year h4 {
  margin: 0 0 0.6rem;
  font-size: 1.1rem;
  color: var(--color-text);
}

.pub-list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 1rem;
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.55;
}

.pub-list li strong {
  color: var(--color-text);
}

.pub-list li em {
  font-style: italic;
}


.footer {
  text-align: center;
  padding: 2rem 1rem 2.5rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

@media (min-width: 900px) {
  .details__content {
    /* keep stacked strips on wider screens as requested */
    grid-template-columns: 1fr;
    align-items: start;
  }
  /* Force two columns for subprojects on wider screens so they appear side-by-side */
  .subproject-list {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }
}

/* Make subprojects appear in two columns earlier so many desktops and tablets show them side-by-side */
@media (min-width: 720px) {
  .subproject-list {
    grid-template-columns: repeat(2, minmax(240px, 1fr));
  }
}

@media (max-width: 900px) {
  .intro__layout {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .intro__headshot {
    max-width: 320px;
    margin: 0 auto;
  }

  /* Contact links under headshot */
  .intro__contact { margin-top: 0.6rem; }
  .contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    align-items: center;
  }
  .contact-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
  }
  .contact-link:hover,
  .contact-link:focus {
    text-decoration: underline;
  }

  @media (min-width: 720px) {
    .contact-links { flex-direction: row; gap: 0.9rem; }
  }
}

@media (max-width: 720px) {
  .visual-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 1.25rem 1rem 0.5rem;
  }

  .nav {
    flex-direction: column;
    gap: 1rem;
  }

  .main {
    padding: 2rem 1rem 3rem;
  }

  .intro {
    padding: 2.25rem 1.5rem;
  }

  .details {
    padding: 2.25rem 1.5rem;
  }

  .workflow {
    flex-direction: column;
  }

  .workflow__step {
    width: 100%;
  }

  .workflow__step::after {
    left: 50%;
    right: auto;
    top: auto;
    bottom: -0.7rem;
    transform: translateX(-50%) rotate(45deg);
  }

  .intro__project-tags {
    flex-direction: column;
    align-items: stretch;
  }
}