:root {
  --ink: #16303f;
  --muted: #3f5766;
  --navy: #0f3f5c;
  --blue: #0b6fa4;
  --sky: #87ceeb;
  --sky-light: #e8f6fd;
  --white: #ffffff;
  --line: #c5e3f2;
  --serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.125rem;
  line-height: 1.65;
}

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

h1, h2, h3 {
  font-family: var(--serif);
  color: var(--navy);
  line-height: 1.2;
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(2.3rem, 6vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 4vw, 2.3rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; }
a { color: var(--blue); text-underline-offset: 3px; }
a:hover { color: var(--navy); }

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

.wrap { width: min(1080px, 100% - 2.5rem); margin-inline: auto; }
.narrow { max-width: 720px; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--navy);
  color: var(--white);
}
.skip-link:focus { top: 1rem; color: var(--white); }

/* Header */
.site-header { background: var(--white); border-bottom: 1px solid var(--line); }
.header-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  padding-block: 0.8rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--navy);
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
}
.brand img { width: 52px; height: 52px; }
.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav a {
  display: block;
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}
.site-nav a:hover { background: var(--sky-light); }
.site-nav a[aria-current] { background: var(--blue); color: var(--white); }

/* Sections */
.section { padding-block: clamp(3rem, 7vw, 5rem); }
.section-alt { background: var(--sky-light); }
.page-head { background: var(--sky); padding-block: clamp(3rem, 7vw, 4.5rem); }
.page-head h1 { margin-bottom: 0.3em; }
.page-head p { color: var(--ink); font-size: 1.25rem; max-width: 640px; margin: 0; }

/* Home hero */
.hero { background: var(--sky); padding-block: clamp(3.5rem, 9vw, 6.5rem); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  align-items: center;
}
.hero p { color: var(--ink); font-size: 1.25rem; max-width: 34em; }
.hero-facts {
  margin: 0;
  padding: 1.5rem 1.75rem;
  border-left: 4px solid var(--white);
}
.hero-facts dt { color: var(--navy); font-family: var(--serif); font-size: 1.5rem; font-weight: 700; }
.hero-facts dd { margin: 0 0 1.1rem; color: var(--ink); }
.hero-facts dd:last-child { margin-bottom: 0; }

.actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.75rem; }
.btn {
  display: inline-block;
  padding: 0.75rem 1.4rem;
  border: 2px solid var(--blue);
  border-radius: 6px;
  background: var(--blue);
  color: var(--white);
  font-weight: 700;
  text-decoration: none;
}
.btn:hover { background: var(--navy); border-color: var(--navy); color: var(--white); }
.btn-ghost { background: var(--white); color: var(--navy); border-color: var(--white); }
.btn-ghost:hover { background: var(--navy); border-color: var(--navy); color: var(--white); }

/* Cards */
.grid { display: grid; gap: 1.5rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  padding: 1.5rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.card p:last-child { margin-bottom: 0; }

/* Timeline */
.timeline { margin: 0; padding: 0; list-style: none; border-left: 3px solid var(--sky); }
.timeline li { padding: 0 0 1.75rem 1.5rem; }
.timeline li:last-child { padding-bottom: 0; }
.timeline .year { display: block; color: var(--blue); font-family: var(--serif); font-size: 1.3rem; font-weight: 700; }
.timeline p { margin: 0; }

/* Programs */
.program {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 2.5rem;
  padding-block: 2.5rem;
  border-top: 1px solid var(--line);
}
.program:first-child { border-top: 0; padding-top: 0; }
.program:last-child { padding-bottom: 0; }
.age { color: var(--blue); font-weight: 700; margin: 0; }
.program ul { margin: 0 0 1em; padding-left: 1.2em; }
.program li { margin-bottom: 0.3em; }
.program p:last-child { margin-bottom: 0; }

/* Gallery */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-bottom: 3rem; }
.gallery:last-child { margin-bottom: 0; }
.gallery figure { margin: 0; }
.gallery img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 8px; }
.gallery figcaption { margin-top: 0.5rem; color: var(--muted); font-size: 1rem; }
.gallery img.photo-upper { object-position: 50% 25%; }
.video-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin-bottom: 3rem; }
.video-feature { margin: 0; }
.video-feature iframe { display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; border-radius: 8px; }
.video-link { display: block; overflow: hidden; border-radius: 8px; }
.video-link img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.video-meta { display: block; margin-top: 0.2rem; color: var(--ink); font-weight: 600; }
.video-fallback { margin: 0.5rem 0 0; font-size: 1rem; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.video-feature figcaption { margin-top: 0.5rem; color: var(--muted); font-size: 1rem; }
.photo-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 3;
  background: var(--sky-light);
  border: 2px dashed #6fa9c7;
  border-radius: 8px;
  color: var(--muted);
  font-size: 1rem;
}

/* Contact */
.contact-list h2 { font-size: 1.3rem; margin-bottom: 0.3em; }
address { font-style: normal; margin-bottom: 1em; }
.contact-list a { overflow-wrap: anywhere; }

/* Footer */
.site-footer { background: var(--sky-light); border-top: 4px solid var(--sky); color: var(--ink); padding-block: 2.5rem; font-size: 1rem; }
.site-footer p { margin: 0 0 0.4em; }
.site-footer a { color: var(--blue); }
.site-footer a:hover { color: var(--navy); }

@media (max-width: 800px) {
  .hero-grid, .program, .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .program { gap: 0.75rem; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .gallery { grid-template-columns: 1fr; }
}

/* Gallery year folders */
.year-folders { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1.5rem; }
.year-folder {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--sky-light);
  color: var(--ink);
  text-decoration: none;
}
.year-folder:hover { border-color: var(--blue); color: var(--ink); }
.year-folder img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; object-position: 50% 25%; }
.year-name { display: block; padding: 0.75rem 1rem 0; color: var(--navy); font-family: var(--serif); font-size: 1.5rem; font-weight: 700; }
.year-count { display: block; padding: 0 1rem 0.75rem; color: var(--muted); font-size: 1rem; }
.back-link { color: var(--navy); font-size: 1.125rem; font-weight: 600; }
.back-link:hover { color: var(--ink); }

/* Gallery thumbnails that expand when clicked */
.gallery-thumbs { grid-template-columns: repeat(2, minmax(0, 220px)); }
.thumb {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: none;
  cursor: zoom-in;
}
.thumb:hover img { opacity: 0.85; }
.lightbox {
  width: fit-content;
  max-width: 92vw;
  max-height: 92vh;
  margin: auto;
  padding: 1rem;
  border: 0;
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  text-align: right;
}
.lightbox::backdrop { background: rgb(15 63 92 / 0.85); }
.gallery .lightbox img {
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 72vh;
  margin: 0.75rem 0 0.5rem;
  aspect-ratio: auto;
  object-fit: contain;
}
.lightbox p { margin: 0; text-align: left; }
.lightbox .btn { font: inherit; font-weight: 700; padding: 0.4rem 1rem; cursor: pointer; }
.lightbox .btn + .btn { margin-left: 0.4rem; }

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