/* Oxbridge — prototype design system
   Ink + ivory editorial, bronze accent. */

:root {
  --ink: #0c0e0d;
  --ink-2: #141815;
  --ink-3: #1d231f;
  --paper: #f3efe7;
  --paper-2: #ece6da;
  --stone: #b4baae;       /* muted text on dark — lifted for contrast */
  --stone-dark: #4d5348;  /* muted text on paper — deepened for contrast */
  --bronze: #b3905e;
  --bronze-bright: #cfa96e;
  --line: rgba(243, 239, 231, 0.14);
  --line-dark: rgba(12, 14, 13, 0.14);
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", -apple-system, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1320px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--bronze); color: var(--ink); }

/* Grain overlay */
body::after {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none; z-index: 2000;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; cursor: pointer; }
img, video { display: block; max-width: 100%; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 5vw; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.4rem 4vw;
  background: linear-gradient(180deg, rgba(12,14,13,0.72), rgba(12,14,13,0));
  transition: background 0.45s var(--ease), padding 0.45s var(--ease), box-shadow 0.45s;
}
.site-header.scrolled {
  background: rgba(12, 14, 13, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 0.9rem 4vw;
  box-shadow: 0 1px 0 var(--line);
}
.brand {
  font-family: var(--serif); font-weight: 400;
  font-size: 1.35rem; letter-spacing: 0.04em;
}
.brand span { color: var(--bronze); }
.nav { display: flex; gap: 2.2rem; align-items: center; }
.nav a {
  font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(243, 239, 231, 0.92); position: relative; padding: 0.4rem 0;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.35);
  transition: color 0.3s;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--paper); }
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--bronze);
  transform: scaleX(0); transform-origin: right;
  transition: transform 0.45s var(--ease);
}
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.nav .cta-link {
  border: 1px solid var(--line); padding: 0.6rem 1.3rem;
  color: var(--paper); border-radius: 2rem;
  transition: border-color 0.3s, background 0.3s, color 0.3s;
}
.nav .cta-link:hover { border-color: var(--bronze); background: var(--bronze); color: var(--ink); }
.nav .cta-link::after { display: none; }

.menu-btn { display: none; background: none; border: 0; cursor: pointer; z-index: 120; }
.menu-btn svg { width: 28px; height: 28px; stroke: var(--paper); }

@media (max-width: 880px) {
  .menu-btn { display: block; }
  .nav {
    position: fixed; inset: 0; background: var(--ink);
    flex-direction: column; justify-content: center; gap: 2rem;
    transform: translateY(-102%); transition: transform 0.6s var(--ease);
  }
  .nav.open { transform: translateY(0); }
  .nav a { font-size: 1.05rem; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: flex-end;
  isolation: isolate; overflow: hidden;
}
.hero-media {
  position: absolute; inset: 0; z-index: -2;
}
.hero-media video, .hero-media img {
  width: 100%; height: 100%; object-fit: cover;
  animation: slowzoom 28s var(--ease) forwards;
}
@keyframes slowzoom { from { transform: scale(1.08); } to { transform: scale(1); } }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(90deg, rgba(12,14,13,0.55) 0%, rgba(12,14,13,0.15) 60%),
    linear-gradient(180deg, rgba(12,14,13,0.6) 0%, rgba(12,14,13,0.35) 45%, rgba(12,14,13,0.96) 100%);
}
.hero-inner { width: 100%; padding: 0 6vw 9vh; }
.eyebrow {
  font-size: 0.74rem; letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--bronze-bright); margin-bottom: 1.6rem; display: block;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5);
}
.hero h1 {
  font-family: var(--serif); font-weight: 320;
  font-size: clamp(2.8rem, 7.5vw, 6.4rem);
  line-height: 1.02; letter-spacing: -0.015em;
  max-width: 16ch;
  text-shadow: 0 2px 28px rgba(0, 0, 0, 0.45);
}
.hero .sub {
  margin-top: 1.8rem; max-width: 52ch;
  color: rgba(243, 239, 231, 0.9); font-size: clamp(1rem, 1.4vw, 1.2rem); font-weight: 300;
  text-shadow: 0 1px 14px rgba(0, 0, 0, 0.5);
}
.hero-ctas { margin-top: 2.6rem; display: flex; gap: 1.2rem; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.95rem 1.9rem; border-radius: 2.5rem;
  border: 1px solid var(--line); color: var(--paper);
  transition: background 0.35s, color 0.35s, border-color 0.35s, transform 0.35s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-solid { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn-solid:hover { background: var(--bronze-bright); border-color: var(--bronze-bright); }
.btn-ghost:hover { border-color: var(--bronze); color: var(--bronze-bright); }
.btn svg { width: 15px; height: 15px; }

.scroll-hint {
  position: absolute; right: 5vw; bottom: 6vh;
  width: 1px; height: 72px; background: var(--line); overflow: hidden;
}
.scroll-hint::after {
  content: ""; position: absolute; left: 0; top: -50%;
  width: 100%; height: 50%; background: var(--bronze);
  animation: drip 2.2s var(--ease) infinite;
}
@keyframes drip { to { top: 110%; } }

/* ---------- Sections ---------- */
section { padding: clamp(3.5rem, 8vh, 6.5rem) 0; position: relative; }
.section-label {
  font-size: 0.72rem; letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--bronze); display: flex; align-items: center; gap: 1rem; margin-bottom: 2.4rem;
}
.section-label::before { content: ""; width: 38px; height: 1px; background: var(--bronze); }

h2 {
  font-family: var(--serif); font-weight: 340;
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  line-height: 1.08; letter-spacing: -0.01em; max-width: none;
}
.lede { color: var(--stone); font-weight: 300; font-size: clamp(1.12rem, 1.5vw, 1.3rem); max-width: none; margin-top: 1.4rem; }

/* Manifesto */
.manifesto p {
  font-family: var(--serif); font-weight: 320;
  font-size: clamp(1.45rem, 3.3vw, 2.7rem);
  line-height: 1.32; max-width: none; letter-spacing: -0.005em;
}
.manifesto p + p { margin-top: 1.8rem; }
.manifesto em { font-style: normal; color: var(--bronze-bright); }

/* Paper (light) sections */
.paper-section { background: var(--paper); color: var(--ink); }
.paper-section .section-label { color: var(--stone-dark); }
.paper-section .section-label::before { background: var(--bronze); }
.paper-section .lede { color: var(--stone-dark); }
.paper-section ::selection { background: var(--ink); color: var(--paper); }

/* Holdings list */
.holdings { border-top: 1px solid var(--line-dark); margin-top: 3rem; }
.holding-row {
  display: grid; grid-template-columns: 1fr auto; align-items: baseline;
  padding: 1.6rem 0; border-bottom: 1px solid var(--line-dark); gap: 0.4rem 1rem;
}
.holding-row h3 { font-family: var(--serif); font-weight: 380; font-size: clamp(1.4rem, 2.6vw, 2rem); }
.holding-row span { font-size: 0.78rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--stone-dark); }
.holding-row p { grid-column: 1 / -1; color: var(--stone-dark); font-weight: 300; font-size: 1rem; }

/* Regions index */
.regions-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 3rem; }
.region-card {
  background: var(--ink-2); padding: 2.4rem 1.8rem; min-height: 280px;
  display: flex; flex-direction: column; justify-content: space-between;
  position: relative; overflow: hidden; transition: background 0.45s;
}
.region-card::before {
  content: ""; position: absolute; inset: 0; opacity: 0;
  background: var(--img) center/cover; transition: opacity 0.6s var(--ease), transform 0.8s var(--ease);
  transform: scale(1.06);
}
.region-card::after {
  content: ""; position: absolute; inset: 0; opacity: 0;
  background: linear-gradient(180deg, rgba(12,14,13,0.25), rgba(12,14,13,0.85));
  transition: opacity 0.6s;
}
.region-card:hover::before { opacity: 1; transform: scale(1); }
.region-card:hover::after { opacity: 1; }
.region-card > * { position: relative; z-index: 1; }
.region-card h3 { font-family: var(--serif); font-weight: 360; font-size: 1.6rem; }
.region-card p { color: var(--stone); font-size: 0.88rem; margin-top: 0.7rem; }
.region-card .go {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.74rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bronze-bright);
}
.region-card .go svg { width: 14px; height: 14px; transition: transform 0.35s var(--ease); }
.region-card:hover .go svg { transform: translateX(5px); }

/* Triad */
.triad { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 3rem; margin-top: 3.4rem; }
.triad h3 {
  font-family: var(--serif); font-weight: 360; font-size: 1.7rem; margin-bottom: 0.9rem;
  display: flex; align-items: baseline; gap: 0.9rem;
}
.triad h3 i { font-style: normal; font-family: var(--sans); font-size: 0.7rem; color: var(--bronze); letter-spacing: 0.2em; }
.triad p { color: var(--stone); font-weight: 300; font-size: 0.98rem; }

/* Commitments strip */
.commitments { display: flex; flex-wrap: wrap; gap: 0.8rem 2.6rem; margin-top: 2.8rem; align-items: baseline; }
.commitments a {
  font-family: var(--serif); font-weight: 340;
  font-size: clamp(1.3rem, 2.4vw, 1.9rem); color: #d9ddd3;
  transition: color 0.3s;
}
.commitments a:hover { color: var(--bronze-bright); }
.aside-note { color: var(--stone-dark); font-size: 0.95rem; margin-top: 1.6rem; font-style: italic; max-width: none; }
.dark .aside-note, section:not(.paper-section) .aside-note { color: var(--stone); }

/* ---------- Region page ---------- */
.page-hero { min-height: 72svh; }
.page-hero h1 { max-width: 22ch; font-size: clamp(2.4rem, 6vw, 5rem); }
.breadcrumbs { font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--stone); margin-bottom: 1.4rem; }
.breadcrumbs a:hover { color: var(--bronze-bright); }

.skews { margin-top: 3.4rem; display: grid; gap: 0; border-top: 1px solid var(--line-dark); }
.skew {
  display: grid; grid-template-columns: minmax(140px, 240px) 1fr;
  gap: 2rem; padding: 2.6rem 0; border-bottom: 1px solid var(--line-dark);
}
.skew h3 { font-family: var(--serif); font-weight: 380; font-size: 1.5rem; }
.skew p { color: var(--stone-dark); font-weight: 300; max-width: none; }
@media (max-width: 700px) { .skew { grid-template-columns: 1fr; gap: 0.7rem; } }

/* Image band */
.img-band { height: clamp(300px, 55vh, 560px); overflow: hidden; position: relative; }
.img-band img { width: 100%; height: 120%; object-fit: cover; will-change: transform; }

/* FAQ */
.faq { max-width: none; }
.faq details { border-bottom: 1px solid var(--line); }
.paper-section .faq details { border-color: var(--line-dark); }
.faq summary {
  cursor: pointer; list-style: none; padding: 1.6rem 0;
  display: flex; justify-content: space-between; align-items: center; gap: 2rem;
  font-family: var(--serif); font-size: 1.25rem; font-weight: 380;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary svg { width: 18px; height: 18px; flex: none; transition: transform 0.4s var(--ease); }
.faq details[open] summary svg { transform: rotate(45deg); }
.faq .a { padding: 0 0 1.8rem; color: var(--stone); font-weight: 300; max-width: none; }
.paper-section .faq .a { color: var(--stone-dark); }

/* Quote */
.bigquote {
  font-family: var(--serif); font-weight: 320;
  font-size: clamp(1.6rem, 3.7vw, 3rem); line-height: 1.28;
  max-width: none; letter-spacing: -0.005em;
}
.bigquote em { font-style: normal; color: var(--bronze-bright); }
.paper-section .bigquote em { color: var(--bronze); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; margin-top: 3rem; }
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }
.audiences { display: grid; gap: 1.4rem; align-content: start; }
.audiences div { border-left: 1px solid var(--bronze); padding-left: 1.4rem; color: var(--stone); font-weight: 300; }
.audiences strong { color: var(--paper); font-weight: 500; display: block; margin-bottom: 0.2rem; }

form { display: grid; gap: 1.5rem; }
.field { display: grid; gap: 0.5rem; }
.field label { font-size: 0.76rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--stone); }
.field input, .field select, .field textarea {
  background: transparent; border: 0; border-bottom: 1px solid var(--line);
  color: var(--paper); font: inherit; padding: 0.7rem 0; border-radius: 0;
  transition: border-color 0.3s;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--bronze); }
.field select option { background: var(--ink-2); }
.hp { position: absolute; left: -9999px; }
.form-note { font-size: 0.8rem; color: var(--stone); }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--line); padding: 4rem 0 2.5rem; }
.footer-grid { display: flex; justify-content: space-between; gap: 3rem; flex-wrap: wrap; }
.footer-grid nav { display: flex; gap: 1.8rem; flex-wrap: wrap; }
.footer-grid nav a { font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--stone); transition: color 0.3s; }
.footer-grid nav a:hover { color: var(--paper); }
.legal { margin-top: 2.6rem; color: #98a094; font-size: 0.8rem; max-width: none; }

/* ---------- Reveal animations ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 2px solid var(--bronze-bright); outline-offset: 3px;
}
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 300;
  background: var(--bronze); color: var(--ink); padding: 0.7rem 1.2rem;
}
.skip-link:focus { left: 0; }

/* Brand mark */
.brand{display:inline-flex;align-items:center;gap:.65rem}
.brand-mark{width:34px;height:34px;border-radius:8px;display:block}
footer .brand-mark{width:30px;height:30px}