@font-face {
  font-family: "Inter Tight";
  src: url("assets/inter-tight-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
}

:root {
  color-scheme: light;
  --paper: #dce7f4;
  --ink: #101b34;
  --blue: #163fbd;
  --muted: #455571;
  --rule: #3c4c66;
  --side: clamp(1.125rem, 4vw, 4rem);
  font-family: "Inter Tight", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

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

body { margin: 0; }
h1, h2, p, figure { margin: 0; }

a {
  color: var(--blue);
  text-decoration-thickness: .08em;
  text-underline-offset: .18em;
}

a:hover { color: var(--ink); }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
[tabindex="-1"]:focus { outline: none; }

img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: #bdcbdc;
}

.shell {
  width: min(calc(100% - 2 * var(--side)), 88.5rem);
  margin-inline: auto;
}

.skip {
  position: absolute;
  z-index: 2;
  top: .5rem;
  left: var(--side);
  padding: .7rem 1rem;
  background: var(--paper);
  transform: translateY(-160%);
}

.skip:focus { transform: translateY(0); }

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 4.35rem;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  color: var(--ink);
  font-size: clamp(1.9rem, 3.15vw, 2.9rem);
  line-height: 1;
  font-weight: 820;
  letter-spacing: -.05em;
  text-decoration: none;
}

.masthead nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(1.05rem, 2.65vw, 2.6rem);
  font-size: clamp(1rem, 1.48vw, 1.35rem);
  font-weight: 700;
}

.masthead nav a { color: var(--ink); text-decoration: none; }
.masthead nav a:hover { color: var(--blue); text-decoration: underline; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, .57fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(1.1rem, 2vw, 2rem);
  padding-block: clamp(1.3rem, 1.95vw, 1.9rem) clamp(1.25rem, 1.6vw, 1.55rem);
}

.hero-copy { padding-bottom: clamp(1.3rem, 4.75vw, 4.55rem); }

.hero h1 {
  font-size: clamp(3rem, 6.42vw, 6.2rem);
  line-height: .96;
  font-weight: 820;
  letter-spacing: -.045em;
  word-spacing: .035em;
}

.hero h1 span { display: block; }

.hero p {
  max-width: 29ch;
  margin-top: clamp(1.05rem, 1.8vw, 1.7rem);
  font-size: clamp(1.18rem, 2.17vw, 2.05rem);
  line-height: 1.2;
  letter-spacing: -.025em;
}

.hero-link {
  display: inline-block;
  margin-top: clamp(1.15rem, 1.85vw, 1.8rem);
  font-size: clamp(1.15rem, 1.89vw, 1.77rem);
  font-weight: 750;
  letter-spacing: -.02em;
}

.feature-photo img { aspect-ratio: 1.69; object-position: 50% 52%; }

figcaption {
  margin-top: .35rem;
  text-align: right;
  font-size: clamp(.78rem, 1.1vw, 1.02rem);
}

.study-index {
  border-top: 1px solid var(--rule);
  padding-block: .85rem clamp(2.8rem, 6.3vw, 5.7rem);
}

.study-index h2, .note h2, .about h2 {
  font-size: clamp(2rem, 3.1vw, 2.9rem);
  font-weight: 820;
  line-height: 1.05;
  letter-spacing: -.038em;
}

.study-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.1rem, 2vw, 1.9rem);
  margin: 1.15rem 0 0;
  padding: 0;
  list-style: none;
}

.study-list a {
  display: block;
  font-size: clamp(1.12rem, 1.47vw, 1.4rem);
  font-weight: 760;
  line-height: 1.2;
  letter-spacing: -.015em;
}

.study-list img { aspect-ratio: 2.11; margin-bottom: .5rem; }

.note, .about {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
  gap: clamp(1.2rem, 5vw, 5rem);
  align-items: start;
  border-top: 1px solid var(--rule);
  padding-block: clamp(1.6rem, 4.8vw, 4.2rem);
}

.note-no {
  margin-bottom: .55rem;
  color: var(--muted);
  font-size: .95rem;
  font-weight: 700;
}

.note-body, .about > div {
  max-width: 64ch;
  font-size: clamp(1.08rem, 1.38vw, 1.3rem);
  line-height: 1.56;
}

.note-body p + p, .about p + p { margin-top: .9em; }
.image-note { color: var(--muted); font-size: .92em; }

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid var(--rule);
  padding-block: 1.25rem 2.1rem;
}

.footer .wordmark { font-size: 1.7rem; }
.footer > a:last-child { font-weight: 700; }

@media (max-width: 54rem) {
  .hero { grid-template-columns: 1fr; align-items: start; gap: 1.4rem; }
  .hero-copy { padding-bottom: 0; }
  .hero h1 { font-size: clamp(3.35rem, 10vw, 5.75rem); }
  .hero p { margin-top: .85rem; }
  .hero-link { margin-top: .85rem; }
  .hero p, .hero-link { font-size: clamp(1.1rem, 3.1vw, 1.6rem); }
}

@media (max-width: 38rem) {
  .study-list { grid-template-columns: 1fr; gap: 1.35rem; }
  .study-list img { aspect-ratio: 1.9; }
  .note, .about { grid-template-columns: 1fr; gap: .75rem; }
}

@media (max-width: 29rem) {
  .masthead { flex-direction: column; align-items: flex-start; gap: .72rem; padding-block: .9rem; }
  .hero h1 { font-size: clamp(2.7rem, 12vw, 3.7rem); }
  .feature-photo img { aspect-ratio: 1.48; }
}