:root {
  color-scheme: light;
  --navy: #14324a;
  --teal: #087c88;
  --ink: #20262e;
  --muted: #586573;
  --line: #d4e0e5;
  --wash: #f3f8fa;
  --white: #ffffff;
  --link: #0759b8;
  --shadow: 0 12px 32px rgba(20, 50, 74, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: linear-gradient(180deg, #edf6f8 0, #ffffff 28rem);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a { color: var(--link); }
a:focus-visible { outline: 3px solid #f0a400; outline-offset: 4px; border-radius: 2px; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: .75rem 1rem;
  background: var(--navy);
  color: white;
}
.skip-link:focus { top: 1rem; }

.site-shell, .site-footer {
  width: min(72rem, calc(100% - 2rem));
  margin-inline: auto;
}

.hero {
  padding: clamp(4rem, 10vw, 8rem) 0 4rem;
  max-width: 58rem;
}

.eyebrow, .card-date, .credential-issuer, .timeline-date {
  color: var(--teal);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}

h1, h2, h3 { color: var(--navy); line-height: 1.18; }
h1 { margin: .2rem 0 .5rem; font-size: clamp(2.7rem, 8vw, 5.5rem); letter-spacing: -.04em; }
h2 { margin: .15rem 0 1.5rem; font-size: clamp(1.8rem, 4vw, 2.7rem); }
h3 { margin: .15rem 0 .55rem; font-size: 1.08rem; }

.headline { margin: 0; color: var(--teal); font-size: clamp(1.15rem, 3vw, 1.6rem); font-weight: 750; }
.summary { max-width: 52rem; margin: 1.5rem 0 .75rem; font-size: 1.12rem; }
.location { color: var(--muted); }

.profile-links { display: flex; flex-wrap: wrap; gap: .75rem 1.25rem; margin-top: 1.5rem; }
.external-link { font-weight: 750; text-underline-offset: .2em; }
.external-link::after { content: " ↗"; text-decoration: none; }

section { padding: 3.5rem 0; border-top: 1px solid var(--line); }
.section-heading { max-width: 50rem; }

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

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

.card {
  min-width: 0;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(255,255,255,.94);
  box-shadow: var(--shadow);
}
.card--primary { border-top: .3rem solid var(--teal); }
.card p:last-of-type { margin-bottom: .65rem; }
.evidence-link { display: inline-block; margin-top: .3rem; }

.timeline { border-left: 2px solid var(--line); }
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 1.4rem;
  padding: 0 0 2.2rem 1.5rem;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -.45rem;
  top: .3rem;
  width: .75rem;
  height: .75rem;
  border: 2px solid var(--white);
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 1px var(--teal);
}
.timeline-date { margin: .1rem 0 0; }
.timeline-item h3, .timeline-item p { margin-top: 0; }

.education-row {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.5rem;
  border-radius: 1rem;
  background: var(--wash);
}
.education-row p { margin: .2rem 0; }

.site-footer {
  padding: 2.5rem 0 4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
}

@media (max-width: 52rem) {
  .card-grid, .impact-grid, .credential-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: .2rem; }
  .education-row { flex-direction: column; gap: .25rem; }
}

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