/* ---------- Prepare the Undergraduate — shared styles ---------- */
:root {
  --ink: #0E1A2B;
  --ink-2: #1B2A3E;
  --ink-soft: #2B3A4E;
  --paper: #F4EFE6;
  --paper-2: #FAF7F1;
  --paper-3: #EDE5D4;
  --rule: #0E1A2B14;
  --rule-strong: #0E1A2B2E;
  --gold: #B8914A;
  --gold-soft: #D9B877;
  --crimson: #7A1F1F;
  --muted: #0E1A2B99;
  --muted-2: #0E1A2B66;

  --serif: "Newsreader", "Source Serif 4", Georgia, serif;
  --sans: "Instrument Sans", "Söhne", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --max: 1320px;
  --gutter: clamp(20px, 4vw, 56px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
.nowrap { white-space: nowrap; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.55;
  font-feature-settings: "ss01", "ss02";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

.mono { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 500; }
.sans { font-family: var(--sans); }
.serif { font-family: var(--serif); }
.label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.caps { font-family: var(--sans); letter-spacing: 0.02em; }

/* container */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  box-shadow: 0 1px 0 var(--rule), 0 8px 24px -20px rgba(14, 26, 43, 0.18);
}
.topbar-inner {
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 14px 0;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--ink);
}
.brand-mark {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--ink); color: var(--paper-2);
  display: grid; place-items: center;
  font-family: var(--serif); font-weight: 600; font-size: 15px;
  letter-spacing: 0.02em;
}
.brand-name { font-family: var(--serif); font-weight: 500; font-size: 18px; letter-spacing: 0.01em; white-space: nowrap; }
.brand-sub { font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); margin-left: 2px; padding-left: 10px; border-left: 1px solid var(--rule-strong); }

.nav {
  display: flex; gap: 22px; align-items: center; justify-content: center;
  white-space: nowrap;
}
.nav a {
  font-family: var(--sans); font-size: 13px; text-decoration: none;
  color: var(--ink); letter-spacing: 0.01em; opacity: 0.78;
  transition: opacity .2s;
}
.nav a:hover { opacity: 1; }
.nav a.active {
  opacity: 1;
  color: var(--crimson);
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: 15.5px;
  letter-spacing: 0;
  padding: 2px 10px;
  border-radius: 2px;
  background: color-mix(in oklab, var(--crimson) 8%, transparent);
  box-shadow: inset 0 -1px 0 color-mix(in oklab, var(--crimson) 35%, transparent);
}
.nav a.active::before { content: none; }
.brand-spacer { display: block; }
.nav .nav-cta { display: none; }

.brand {
  display: inline-flex; align-items: center; gap: 14px;
  text-decoration: none; color: var(--ink);
  justify-self: start;
  padding: 4px 6px 4px 0;
  transition: opacity .2s;
}
.brand:hover { opacity: 0.85; }
.brand-logo {
  display: block;
  height: 56px;
  width: 56px;
  object-fit: cover;
  object-position: center;
  border-radius: 6px;
  background: var(--paper-2);
  transition: transform .25s cubic-bezier(.2,.8,.2,1);
}
.brand:hover .brand-logo { transform: translateY(-1px); }
.brand-wordmark {
  display: flex; flex-direction: column; gap: 2px;
  line-height: 1.1;
}
.brand-name {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: -0.005em;
  color: var(--ink);
  white-space: nowrap;
}
.brand-sub {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
@media (max-width: 760px) {
  .brand-wordmark { display: none; }
  .brand-logo { height: 44px; width: 44px; }
}

.cta {
  justify-self: end;
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--ink); color: var(--paper-2);
  padding: 10px 16px; border-radius: 999px;
  font-family: var(--sans); font-size: 13px; letter-spacing: 0.01em;
  text-decoration: none; border: 0; cursor: pointer;
  transition: transform .2s, background .2s;
}
.nav-toggle { display: none; }
.cta:hover {
  background: var(--crimson);
  transform: translateY(-1px);
  box-shadow: 0 14px 28px -18px var(--ink);
}
.cta:active { transform: translateY(0) scale(0.985); }
.cta .dot { display: none !important; }

.cta-ghost {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 16px; border-radius: 999px;
  font-family: var(--sans); font-size: 13px;
  text-decoration: none; border: 1px solid var(--ink); color: var(--ink);
  cursor: pointer; background: transparent;
  transition: all .2s;
}
.cta-ghost:hover {
  background: var(--ink);
  color: var(--paper-2);
  transform: translateY(-1px);
  box-shadow: 0 14px 28px -18px var(--ink);
}
.cta-ghost:active { transform: translateY(0) scale(0.985); }

.cta-arrow {
  display: inline-block; vertical-align: middle;
  flex-shrink: 0;
  transition: transform 0.2s ease-out;
}
.cta-arrow-r { margin-left: 2px; }
.cta-arrow-l { margin-right: 2px; }
.cta-ghost:hover .cta-arrow-r,
.cta:hover .cta-arrow-r { transform: translateX(3px); }
.cta-ghost:hover .cta-arrow-l,
.cta:hover .cta-arrow-l { transform: translateX(-3px); }

/* ---------- Section scaffolding ---------- */
.section {
  padding: clamp(72px, 10vw, 140px) 0;
  border-top: 1px solid var(--rule);
  position: relative;
  scroll-margin-top: 88px;
}
.section-head {
  display: grid; grid-template-columns: 180px 1fr; gap: 40px;
  margin-bottom: 60px;
  align-items: start;
}
.section-head .eyebrow { padding-top: 10px; }
.section-head h2 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(36px, 4.8vw, 64px);
  line-height: 1.05; letter-spacing: -0.015em;
  margin: 0; text-wrap: balance;
}
.section-head h2 em { font-style: italic; color: var(--crimson); font-weight: 400; }
.booking-note {
  grid-column: 2; margin: 16px 0 0;
  font-family: var(--sans); font-size: 15px; color: var(--muted);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--ink); color: var(--paper-2);
  padding: 80px 0 40px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 48px;
  padding-bottom: 60px; border-bottom: 1px solid #ffffff18;
}
.footer h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: #ffffff66; font-weight: 500; margin: 0 0 18px; }
.footer a { display: block; text-decoration: none; color: var(--paper-2); opacity: 0.82; font-family: var(--sans); font-size: 14px; padding: 6px 0; }
.footer a:hover { opacity: 1; color: var(--gold-soft); }
.footer-bot {
  display: flex; justify-content: space-between; padding-top: 30px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: #ffffff55;
}

/* ---------- Entrance animations ---------- */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* Topbar appears immediately to avoid layout shift on load */
.topbar { animation: fadeIn 0.3s ease-out forwards; }

/* Sub-page heroes — short rise, no perceptible delay */
.page-hero { opacity: 0; animation: fadeUp 0.4s cubic-bezier(.2,.8,.2,1) forwards; }

/* Sections below hero fade + rise as they enter viewport */
.section {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s cubic-bezier(.2,.8,.2,1), transform 0.5s cubic-bezier(.2,.8,.2,1);
  will-change: transform, opacity;
}
.section.in-view { opacity: 1; transform: none; }

/* Staggered children — auto-delays by source order via nth-child */
.fade-stagger > * {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s cubic-bezier(.2,.8,.2,1), transform 0.4s cubic-bezier(.2,.8,.2,1);
}
.fade-stagger > *:nth-child(1) { transition-delay: 40ms; }
.fade-stagger > *:nth-child(2) { transition-delay: 80ms; }
.fade-stagger > *:nth-child(3) { transition-delay: 120ms; }
.fade-stagger > *:nth-child(4) { transition-delay: 160ms; }
.fade-stagger > *:nth-child(5) { transition-delay: 200ms; }
.fade-stagger > *:nth-child(6) { transition-delay: 240ms; }
.section.in-view .fade-stagger > * { opacity: 1; transform: none; }

/* Hero watermark — floating logo behind the assembly */
@keyframes floatY { 0%, 100% { transform: translate(-50%, -50%); } 50% { transform: translate(-50%, calc(-50% - 10px)); } }
.hero-watermark {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: clamp(420px, 60%, 620px);
  height: auto;
  opacity: 0.18;
  pointer-events: none;
  animation: floatY 8s ease-in-out infinite;
  mix-blend-mode: multiply;
  z-index: 0;
}
.hero-visual { position: relative; }
.hero-visual .stack { position: relative; z-index: 1; }
@media (max-width: 880px) {
  .hero-watermark { opacity: 0.12; width: clamp(280px, 70%, 420px); }
}

/* Footer matches the section pattern */
.footer {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(.2,.8,.2,1);
}
.footer.in-view { opacity: 1; transform: none; }

/* scrollbar subtle */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--rule-strong); border-radius: 10px; }

/* reduce motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}