:root {
  --ink: #0a0a0a;
  --paper: #fafaf7;
  --sand: #d9d3c7;
  --clay: #b8875c;
  --green: #006c35;
  --muted: #a6a3a0;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --arabic: "Noto Naskh Arabic", serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; min-width: 320px; min-height: 100%; }
body {
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.page {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  isolation: isolate;
  padding: max(2rem, env(safe-area-inset-top)) clamp(1.5rem, 4vw, 5rem) max(2rem, env(safe-area-inset-bottom));
  background-size: cover;
  background-repeat: no-repeat;
}

.night-one .page {
  background-image: linear-gradient(90deg, rgba(5,7,9,.68) 0%, rgba(5,7,9,.36) 48%, rgba(5,7,9,.05) 100%), url("assets/night-moonlit.png");
  background-position: 60% center;
}
.night-two .page {
  background-image: linear-gradient(90deg, rgba(5,6,8,.72) 0%, rgba(5,6,8,.32) 53%, rgba(5,6,8,.04) 100%), url("assets/night-stars.png");
  background-position: 58% center;
}
.night-three .page {
  background-image: linear-gradient(90deg, rgba(5,7,10,.76) 0%, rgba(5,7,10,.42) 48%, rgba(5,7,10,.08) 100%), url("assets/night-afterglow.png");
  background-position: 60% center;
}

.page::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .055;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.45'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.topbar { display: flex; align-items: baseline; justify-content: space-between; gap: 2rem; }
.about-link { color: rgba(250,250,247,.7); font-size: .6rem; font-weight: 600; letter-spacing: .28em; text-decoration: none; text-transform: uppercase; transition: color 180ms ease; }
.about-link:hover, .about-link:focus-visible { color: var(--paper); }

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: .8rem;
  width: fit-content;
  color: var(--paper);
  text-decoration: none;
}
.wordmark__latin { font-family: var(--serif); font-size: 1rem; font-weight: 700; letter-spacing: .12em; }
.wordmark__slash { color: var(--clay); font-size: .85rem; }
.wordmark__arabic { font-family: var(--arabic); font-size: 1.1rem; font-weight: 700; color: var(--clay); line-height: 1; }

.hero { align-self: center; max-width: 57rem; padding-block: clamp(5rem, 14vh, 10rem); }
.eyebrow { margin: 0 0 clamp(1.5rem, 3vw, 2.75rem); font-size: .64rem; font-weight: 500; letter-spacing: .38em; text-transform: uppercase; color: var(--clay); }
h1 { max-width: 13ch; margin: 0; font-family: var(--serif); font-size: clamp(3.25rem, 7.4vw, 8.5rem); font-weight: 400; line-height: .92; letter-spacing: -.052em; text-wrap: balance; text-shadow: 0 2px 24px rgba(0,0,0,.28); }
h1 em { display: block; color: var(--sand); font-weight: 400; }
.intro { max-width: 29rem; margin: clamp(2rem, 4vw, 3.5rem) 0 0; padding-left: clamp(1.25rem, 2.5vw, 2.5rem); border-left: 1px solid var(--green); font-family: var(--serif); font-size: clamp(1rem, 1.4vw, 1.25rem); line-height: 1.6; color: rgba(250,250,247,.82); text-shadow: 0 1px 18px rgba(0,0,0,.35); }
.study-invite { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; max-width: 42rem; margin: clamp(1.75rem, 3vw, 2.6rem) 0 0 clamp(1.25rem, 2.5vw, 2.5rem); padding-top: clamp(1.25rem, 2vw, 1.75rem); border-top: 1px solid rgba(250,250,247,.2); }
.study-invite__copy { margin: 0; }
.study-invite__label { display: block; margin-bottom: .65rem; color: var(--clay); font-size: .55rem; font-weight: 600; letter-spacing: .28em; text-transform: uppercase; }
.study-invite__title { display: block; max-width: 35rem; font-family: var(--serif); font-size: clamp(.96rem, 1.25vw, 1.12rem); font-weight: 400; line-height: 1.5; color: rgba(250,250,247,.88); }
.study-invite__link { flex: 0 0 auto; padding-bottom: .35rem; border-bottom: 1px solid var(--green); color: var(--paper); font-size: .58rem; font-weight: 600; letter-spacing: .22em; text-decoration: none; text-transform: uppercase; white-space: nowrap; transition: color 180ms ease, border-color 180ms ease; }
.study-invite__link:hover, .study-invite__link:focus-visible { color: var(--sand); border-color: var(--sand); }
.footer { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; padding-top: 1.5rem; border-top: 1px solid rgba(250,250,247,.22); }
.tagline, .edition { margin: 0; font-size: .6rem; font-weight: 500; letter-spacing: .3em; text-transform: uppercase; }
.tagline { color: var(--paper); }
.edition { color: var(--muted); text-align: right; white-space: nowrap; }

.reveal { opacity: 0; transform: translateY(18px); animation: arrive 900ms cubic-bezier(.22,.8,.22,1) forwards; }
.reveal:nth-child(2) { animation-delay: 120ms; }
.reveal:nth-child(3) { animation-delay: 240ms; }
@keyframes arrive { to { opacity: 1; transform: translateY(0); } }

@media (max-width: 850px) {
  .night-one .page { background-image: linear-gradient(180deg, rgba(5,7,9,.58) 0%, rgba(5,7,9,.30) 58%, rgba(5,7,9,.46) 100%), url("assets/night-moonlit.png"); background-position: 62% center; }
  .night-two .page { background-image: linear-gradient(180deg, rgba(5,6,8,.60) 0%, rgba(5,6,8,.28) 58%, rgba(5,6,8,.44) 100%), url("assets/night-stars.png"); background-position: 60% center; }
  .night-three .page { background-image: linear-gradient(180deg, rgba(5,7,10,.64) 0%, rgba(5,7,10,.34) 58%, rgba(5,7,10,.46) 100%), url("assets/night-afterglow.png"); background-position: 61% center; }
  .hero { padding-block: clamp(4.5rem, 12vh, 7rem); }
  h1 { max-width: 11ch; }
}

@media (max-width: 520px) {
  .page { padding-inline: max(1.5rem, env(safe-area-inset-left)); }
  .footer { align-items: flex-start; }
  .edition { font-size: .54rem; letter-spacing: .24em; }
  .intro { max-width: 22rem; }
}

@media (max-width: 620px) {
  .hero { padding-block: clamp(3.4rem, 8vh, 5rem); }
  .study-invite { align-items: flex-start; flex-direction: column; gap: 1rem; margin-top: 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}