.black-home, .black-bio {
  --ink: #f6f2ea;
  --muted: #c5bfba;
  background: #090909;
}
.black-home .topbar, .black-bio .topbar {
  border: 0;
  background: transparent;
  backdrop-filter: none;
}
.black-home .topbar-inner, .black-bio .topbar-inner {
  width: min(100% - 2.3rem, 76rem);
  min-height: clamp(4.4rem, 11vw, 6rem);
}
.black-home .menu summary, .black-bio .menu summary { color: var(--ink); }
.black-home .brand img, .black-bio .brand img { width: clamp(3.25rem, 8vw, 4.55rem); height: auto; }
.black-home :focus-visible, .black-bio :focus-visible {
  outline: 2px solid #fff3d9;
  outline-offset: 4px;
}
.black-main { overflow: clip; }
.black-title {
  text-align: center;
  padding: clamp(1.55rem, 5vw, 3rem) .5rem 0;
}
.black-title h1 {
  font-size: clamp(3.4rem, 16.4vw, 7.9rem);
  line-height: .88;
  letter-spacing: -.046em;
  text-transform: uppercase;
}
.black-title em {
  display: block;
  margin: -.07em auto 0;
  font: 400 1.31em/.91 var(--script);
  letter-spacing: -.048em;
  text-transform: none;
}
.black-title p {
  margin: .55rem 0 0;
  font: 400 clamp(.86rem, 3.5vw, 1.35rem)/1.25 var(--serif);
  letter-spacing: .13em;
}
.roulette {
  width: min(100%, 55rem);
  margin: clamp(1.6rem, 6vw, 3rem) auto 0;
  padding-bottom: clamp(1rem, 7vw, 3.3rem);
}
.roulette-stage {
  --card: clamp(7.8rem, 36.7vw, 17rem);
  --step: clamp(2.8rem, 17vw, 9.5rem);
  position: relative;
  display: flex;
  justify-content: center;
  gap: .4rem;
  padding-inline: .9rem;
  isolation: isolate;
}
.roulette-stage::before {
  content: "";
  position: absolute;
  inset: -30% -18% -40%;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(ellipse at 50% 48%, #bcb4a438, #79747012 37%, transparent 63%);
}
.course-card {
  display: grid;
  align-content: end;
  flex: 1;
  border-radius: clamp(.75rem, 3.5vw, 1.6rem);
  border-color: #d2d0ca67;
  color: var(--ink);
  text-align: center;
  text-decoration: none;
  background:
    radial-gradient(ellipse at 8% 3%, #ffffff2b, transparent 38%),
    linear-gradient(126deg, #5b5958d9, #222222f2 55%, #414040ed);
  box-shadow: inset 0 1px 1px #d8d7d49e, inset 0 0 8px #f8f6f020, 0 14px 32px #0008;
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}
.course-card > span {
  display: grid;
  place-content: center;
  min-height: 3.15rem;
  padding: .25rem;
  border-top: 1px solid #e0dbd741;
  font: 400 clamp(.66rem, 2.65vw, 1.35rem)/1.08 var(--serif);
  background: linear-gradient(120deg, #cccccc19, #13131306 60%, #ffffff10);
}
.roulette[data-ready] .roulette-stage {
  --card: clamp(10rem, 65vw, 17rem);
  --gutter: calc((100% - var(--card)) / 2);
  justify-content: flex-start;
  align-items: center;
  gap: clamp(.65rem, 3vw, 1.35rem);
  overflow-x: auto;
  padding: .65rem 0 1rem;
  scroll-snap-type: none;
  scrollbar-width: none;
  overscroll-behavior-x: contain;
  touch-action: pan-x pan-y pinch-zoom;
  user-select: none;
  cursor: grab;
}
.roulette[data-ready] .roulette-stage::before,
.roulette[data-ready] .roulette-stage::after {
  content: "";
  position: static;
  flex: 0 0 max(0px, calc(var(--gutter) - clamp(.65rem, 3vw, 1.35rem)));
  background: none;
}
.roulette-stage::-webkit-scrollbar { display: none; }
.roulette[data-dragging] .roulette-stage { scroll-snap-type: none; }
.roulette[data-dragging] .roulette-stage, .roulette[data-dragging] .course-card { cursor: grabbing; }
.roulette[data-ready] .course-card {
  flex: 0 0 var(--card);
  aspect-ratio: 1 / 1.35;
  overflow: hidden;
  transform: translateX(var(--card-shift, 0%)) scale(var(--card-scale, .5));
  opacity: .8;
  transition: opacity 150ms ease;
  -webkit-tap-highlight-color: transparent;
}
.roulette[data-ready] .course-card.is-centered { opacity: 1; }
.roulette[data-ready] .course-card > span { font-size: clamp(1.05rem, 4.3vw, 1.55rem); }
.roulette-dots {
  display: flex;
  justify-content: center;
  margin: clamp(.6rem, 4.3vw, 1.6rem) 0 clamp(.75rem, 3.8vw, 1.4rem);
}
.roulette-dots[hidden] { display: none; }
.roulette-dots button {
  display: grid;
  place-items: center;
  width: 23px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: .5rem;
  background: transparent;
  cursor: pointer;
}
.roulette-dots button::after {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #a8a5a1;
  transition: transform 180ms, background 180ms;
}
.roulette-dots button[aria-pressed="true"]::after {
  background: var(--ink);
  transform: scale(1.45);
}
.black-actions { display: grid; justify-items: center; gap: .65rem; padding-inline: 1rem; }
.black-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .8rem;
  padding: .75rem clamp(.9rem, 4vw, 2.5rem);
  min-height: 48px;
  border-radius: 99px;
  color: var(--ink);
  font: 400 clamp(.92rem, 3.56vw, 1.4rem)/1.22 var(--serif);
  text-align: center;
  text-decoration: none;
}
.black-button.glass { border-color: #eeeeeb86; box-shadow: inset 0 0 10px #f5f0e324; }
.black-button:hover { background-color: #ffffff12; }
.roulette-caption {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .65rem;
  margin: 0 1rem 1.15rem;
  color: var(--muted);
  font: 400 clamp(.9rem, 3.6vw, 1.2rem)/1.3 var(--serif);
}
.educator-link { min-width: min(100%, 17rem); }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
}
.black-bio {
  background: radial-gradient(ellipse 36rem 31rem at 70% 13%, #302d2e, transparent), #08090d;
}
.bio-main { width: min(100% - 2.5rem, 64rem); }
.bio-back { display: inline-flex; align-items: center; gap: .65rem; min-height: 44px; color: var(--muted); font-size: .82rem; text-decoration: none; }
.bio-back:hover { text-decoration: underline; }
.bio-intro { display: grid; align-items: center; gap: 1.1rem; padding: 1.15rem 0 1.5rem; }
.bio-kicker { color: #d3cbc2; font-size: .69rem; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }
.bio-heading h1 { font-size: clamp(3.75rem, 14vw, 7rem); letter-spacing: -.052em; }
.bio-heading h1 em { font-weight: 400; }
.bio-heading > p:last-child { margin-bottom: 0; color: var(--muted); }
.bio-portrait {
  position: relative;
  display: grid;
  place-items: end center;
  isolation: isolate;
  height: clamp(18rem, 65vw, 29rem);
  margin: 0;
}
.bio-portrait::before {
  content: "";
  position: absolute;
  inset: 19% 2% 0;
  z-index: -1;
  border-radius: 1.65rem;
  border: 1px solid #dedad34a;
  background: linear-gradient(140deg, #5c5350a1, #211f25 64%);
  box-shadow: inset 0 1px 1px #d9d0c850, 0 15px 35px #000a;
}
.bio-portrait img {
  height: 100%;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  mask-image: linear-gradient(90deg, transparent, black 13%, black 87%, transparent),
    linear-gradient(0deg, transparent, black 18%, black 91%, transparent);
  mask-composite: intersect;
  filter: drop-shadow(0 14px 15px #0008);
}
.bio-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.bio-metrics li {
  display: grid;
  place-content: center;
  min-height: 5rem;
  padding: .47rem .15rem;
  border-radius: .9rem;
  color: var(--muted);
  font-size: clamp(.69rem, 2.65vw, .95rem);
  text-align: center;
}
.bio-metrics strong { color: var(--ink); font: 400 clamp(1rem, 4vw, 1.6rem)/1.2 var(--serif); }
.bio-belief, .bio-alumni, .bio-close { margin-block: clamp(3.25rem, 9vw, 6.5rem); }
.bio-main h2 {
  margin: 0;
  font: 400 clamp(1.75rem, 7vw, 3.5rem)/1.12 var(--serif);
  letter-spacing: -.035em;
  text-wrap: balance;
}
.bio-belief { text-align: center; }
.bio-belief p { max-width: 34rem; margin-inline: auto; }
.bio-main h2 + p, .bio-stories p { color: var(--muted); }
.bio-school {
  display: grid;
  grid-template-columns: 32% 1fr;
  align-items: center;
  overflow: hidden;
  border-radius: 1.25rem;
}
.bio-school img { width: 100%; height: 100%; min-height: 11rem; object-fit: cover; object-position: 48% 48%; }
.bio-school div { padding: .9rem clamp(.85rem, 4vw, 2rem); }
.bio-school h2 { font-size: clamp(1.4rem, 5.2vw, 2.65rem); }
.bio-school p { margin-bottom: 0; font-size: .9rem; }
.bio-alumni > p { margin: .5rem 0 1.25rem; }
.bio-stories { display: grid; gap: .65rem; align-items: start; }
.bio-stories details { border-radius: 1.1rem; }
.bio-stories summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .7rem;
  padding: .85rem 1rem;
  min-height: 72px;
  cursor: pointer;
  list-style: none;
}
.bio-stories summary::-webkit-details-marker { display: none; }
.bio-stories summary::after { content: "+" / ""; color: var(--muted); font: 400 1.3rem/1 var(--sans); }
.bio-stories details[open] summary::after { content: "−" / ""; }
.bio-stories strong, .bio-stories small { display: block; }
.bio-stories strong { font-weight: 600; }
.bio-stories small { color: var(--muted); margin-top: .22rem; }
.bio-stories p { margin: 0 1rem 1rem; padding-top: .8rem; border-top: 1px solid #ffffff2b; font-size: .92rem; }
.bio-close { text-align: center; }
.bio-close .black-button { margin-top: 1.3rem; }
@media (min-width: 680px) {
  .bio-intro { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .bio-stories { grid-template-columns: repeat(2, 1fr); }
  .bio-school img { max-height: 15rem; }
}
@media (prefers-reduced-motion: reduce) {
  .roulette[data-ready] .course-card, .roulette-dots button::after { transition: none; }
}

.course-card-photo {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}
.course-card-photo > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: -2;
  pointer-events: none;
}
.course-card-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, #0001 48%, #0007 75%, #000c);
  box-shadow: inset 0 1px 1px #ffffff8c;
  pointer-events: none;
}
.course-card-photo > span {
  background: #121212a6;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.course-card-photo[href="/podal-russo/"] > img { object-position: 40% center; }
.course-card-photo[href="/native-geometry/"] > img { object-position: 45% center; }