:root {
  --ink: #18212f;
  --muted: #596579;
  --line: #dfe5ed;
  --paper: #ffffff;
  --soft: #f5f8fb;
  --soft-blue: #e8f4f7;
  --teal: #117f8b;
  --teal-dark: #0c5d68;
  --gold: #d9a441;
  --navy: #243a5a;
  --shadow: 0 18px 45px rgba(24, 33, 47, 0.1);
  --radius: 8px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

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

a {
  color: var(--teal-dark);
}

a:hover {
  color: var(--teal);
}

:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  color: var(--paper);
  background: var(--ink);
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0;
}

.brand img {
  width: 248px;
  height: auto;
  margin-top: -2.45rem;
  margin-bottom: -2.45rem;
}

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  content: "";
}

.nav-toggle-label span::before {
  transform: translateY(-7px);
}

.nav-toggle-label span::after {
  transform: translateY(5px);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  padding: 0.6rem 0.75rem;
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--teal-dark);
  background: var(--soft-blue);
}

.button,
button.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.78rem 1.1rem;
  color: var(--paper);
  background: var(--teal-dark);
  border: 0;
  border-radius: var(--radius);
  font: inherit;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 10px 22px rgba(12, 93, 104, 0.18);
}

.button:hover {
  color: var(--paper);
  background: var(--teal);
}

.button.secondary {
  color: var(--teal-dark);
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: none;
}

.button.secondary:hover {
  color: var(--ink);
  background: var(--soft);
}

.button.gold {
  color: var(--ink);
  background: var(--gold);
  box-shadow: 0 10px 22px rgba(217, 164, 65, 0.24);
}

.hero {
  background:
    linear-gradient(110deg, rgba(24, 33, 47, 0.92), rgba(36, 58, 90, 0.82)),
    url("../img/project-stem-series.png") center/cover;
  color: var(--paper);
}

.hero-inner,
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.hero-inner {
  min-height: 640px;
  padding-top: 7rem;
  padding-bottom: 6rem;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.65fr);
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #8fe3e8;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 1.2rem;
  font-size: clamp(2.35rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.55rem;
  font-size: 1.25rem;
  line-height: 1.25;
}

.lead {
  max-width: 720px;
  color: #dfeaf2;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.55;
}

.page-hero {
  background: var(--navy);
  color: var(--paper);
}

.page-hero .container {
  padding-top: 5rem;
  padding-bottom: 4.5rem;
}

.page-hero h1 {
  max-width: 100%;
}

.page-hero p {
  max-width: 760px;
  color: #dfeaf2;
  font-size: 1.2rem;
}

.hero-card {
  padding: 1.5rem;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card img {
  width: 100%;
  margin-bottom: 1.2rem;
  border-radius: var(--radius);
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.8rem;
}

.section {
  padding: 5rem 0;
}

.section.soft {
  background: var(--soft);
}

.section.tint {
  background: var(--soft-blue);
}

.section-header {
  max-width: 760px;
  margin-bottom: 2.2rem;
}

.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.muted {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 1.25rem;
}

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

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

.card {
  height: 100%;
  padding: 1.35rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 26px rgba(24, 33, 47, 0.06);
}

.card img,
.feature img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin-bottom: 1rem;
  border-radius: var(--radius);
  background: var(--soft);
}

.feature {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 2.25rem;
  align-items: center;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.stat {
  padding: 1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
}

.stat strong {
  display: block;
  color: var(--paper);
  font-size: 1.45rem;
  line-height: 1.1;
}

.stat span {
  color: #dfeaf2;
  font-size: 0.92rem;
}

.person-card {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 1.4rem;
  align-items: start;
  padding: 1.25rem;
}

.person-card img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: var(--radius);
}

.event-empty {
  padding: 2rem;
  background: var(--paper);
  border: 1px dashed var(--teal);
  border-radius: var(--radius);
}

.event-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 0.85rem;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.donation-panel {
  padding: 2rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.paypal-note {
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  color: #dfeaf2;
  background: var(--ink);
}

.footer-grid {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3rem 1.25rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 2rem;
}

.site-footer a {
  color: #dfeaf2;
}

.footer-logo {
  width: 76px;
  margin-bottom: 1rem;
}

.site-footer h2 {
  margin-bottom: 0.8rem;
  font-size: 1rem;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-links {
  display: grid;
  gap: 0.45rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-bottom .container {
  padding-top: 1rem;
  padding-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: #b9c5d5;
  font-size: 0.92rem;
}

@media (max-width: 860px) {
  body {
    font-size: 16px;
  }

  .nav-toggle-label {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    padding: 0.75rem 1.25rem 1rem;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .site-nav a {
    display: block;
    width: 100%;
  }

  .nav-toggle:checked ~ .site-nav {
    display: grid;
  }

  .hero-inner,
  .feature,
  .grid.two,
  .grid.three,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    min-height: auto;
    padding-top: 4.5rem;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }

  .person-card {
    grid-template-columns: 1fr;
  }

  .person-card img {
    max-width: 360px;
  }

  .footer-bottom .container {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .brand img {
    width: 186px;
    margin-top: -1.65rem;
    margin-bottom: -1.65rem;
  }

  .section,
  .page-hero .container {
    padding-top: 3.25rem;
    padding-bottom: 3.25rem;
  }
}