:root {
  --paper: #FFFFFF;
  --ink: #0F0F0F;
  --muted: #5F625F;
  --rule: #E6E6E3;
  --coral: #FF4F12;
  --blue: #2140E8;
  --mint: #2FC48D;
  --gold: #F2B705;
  --pink: #E0559A;
  --sans: "Outfit", "Segoe UI", system-ui, sans-serif;
  --serif: "EB Garamond", Georgia, serif;
  --lh: 0.86em;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.125rem;
  line-height: 1.55;
}

a { color: inherit; text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 3px; }

.wrap { width: 100%; max-width: 62rem; margin: 0 auto; padding: 0 1.5rem; }

/* Corner navigation */
.corner {
  position: fixed;
  z-index: 20;
  font-weight: 700;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
  line-height: 1;
}
.corner:hover { color: var(--coral); }
.corner.tl { top: 1.3rem; left: 1.6rem; }
.corner.tr { top: 1.3rem; right: 1.6rem; }
.corner.bl { bottom: 1.3rem; left: 1.6rem; }
.corner.br { bottom: 1.3rem; right: 1.6rem; }
.logo span { display: inline-block; }
.logo .q { width: 0.3em; height: 0.3em; margin-left: 0.06em; background: var(--coral); }

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.stage {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: min(100%, 72rem);
  transform: translateX(-50%);
  pointer-events: none;
}
.card { position: absolute; display: block; opacity: 0; transform: scale(0.92); }
.card svg { width: 100%; height: 100%; display: block; }
.card.show { opacity: 1; transform: none; transition: opacity 260ms ease-out, transform 420ms cubic-bezier(.2, 1.4, .4, 1); }
.card.gray    { background: #ECECEA; left: 3%; top: 44%; width: 40%; height: 40%; z-index: 1; }
.card.pyth    { left: 7%;  top: 13%; width: 26%; aspect-ratio: 3 / 4; z-index: 2; }
.card.penrose { left: 17%; top: 60%; width: 14%; aspect-ratio: 10 / 9; z-index: 3; }
.card.orange  { left: 53%; top: 6%;  width: 36%; aspect-ratio: 4 / 3; z-index: 1; }
.card.euler   { left: 70%; top: 21%; width: 23%; aspect-ratio: 1; z-index: 2; }
.card.sheet   { left: 62%; top: 50%; width: 25%; aspect-ratio: 3 / 4; z-index: 2; }

.headline {
  position: relative;
  z-index: 5;
  margin: 0;
  text-align: center;
  font-weight: 600;
  font-size: clamp(3.3rem, 10vw, 7.8rem);
  letter-spacing: -0.035em;
  line-height: var(--lh);
  visibility: hidden;
}
.headline.on { visibility: visible; }
.line { display: block; height: var(--lh); white-space: nowrap; position: relative; }
.line.paren { height: 0; transition: height 480ms cubic-bezier(.65, 0, .25, 1); }
.line.paren.open { height: var(--lh); }

.slot {
  position: relative;
  display: inline-block;
  vertical-align: top;
  height: var(--lh);
  line-height: var(--lh);
  text-align: center;
  white-space: nowrap;
}
.slot .g { display: inline-block; }
.slot .tail { position: absolute; left: 88%; bottom: 0.04em; font-size: 0.5em; line-height: 1; color: #A0A0A0; }
.slot .o { position: absolute; left: 50%; top: 50%; display: block; }
.slot .o svg { width: 100%; height: 100%; display: block; overflow: visible; }
.slot .tiny {
  position: absolute; left: 30%; top: 0.62em;
  font-size: 0.12em; letter-spacing: 0.05em; font-weight: 700; line-height: 1;
  transform: rotate(-78deg); transform-origin: left top;
}
.qedbox { display: inline-block; width: 0.3em; height: 0.3em; margin-left: 0.02em; vertical-align: 0.01em; }
.shade { background: linear-gradient(180deg, #EDEDED 10%, #7A7A7A 90%); -webkit-background-clip: text; background-clip: text; color: transparent !important; }

.caret { position: absolute; width: 0.04em; height: 0.6em; background: var(--ink); top: 0.16em; animation: blink 0.9s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.paren-row { display: inline-flex; align-items: center; justify-content: center; gap: 0.07em; height: var(--lh); }
.paren-row .p { display: inline-block; transform: scale(0); }
.paren.open .paren-row .p { transform: none; transition: transform 380ms cubic-bezier(.2, 1.5, .4, 1) 120ms; }
.thumb { display: inline-block; width: 1.06em; height: 0.64em; border-radius: 0.05em; overflow: hidden; transform: scale(0); margin-top: 0.05em; }
.thumb svg { width: 100%; height: 100%; display: block; }
.paren.open .thumb { transform: none; transition: transform 420ms cubic-bezier(.2, 1.5, .4, 1) 200ms; }

.hero-cta {
  position: absolute;
  z-index: 6;
  left: 50%;
  bottom: 4.6rem;
  transform: translate(-50%, 8px);
  text-align: center;
  width: min(90vw, 28rem);
  opacity: 0;
}
.hero-cta.show { opacity: 1; transform: translate(-50%, 0); transition: opacity 500ms ease, transform 500ms ease; }
.hero-cta p { display: inline-block; margin: 0 0 0.8rem; padding: 0.3rem 0.85rem; background: #fff; border-radius: 999px; color: var(--muted); font-size: 1.02rem; }

.button {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  font: inherit;
  font-weight: 600;
  font-size: 1.02rem;
  padding: 0.75rem 1.45rem;
  border-radius: 999px;
  text-decoration: none;
  border: 0;
  cursor: pointer;
}
.button:hover { background: var(--coral); }

/* Custom cursor (fine pointers only) */
.cursor {
  position: fixed; z-index: 50; left: 0; top: 0;
  width: 12px; height: 12px; margin: -6px 0 0 -6px;
  border-radius: 50%; background: var(--ink);
  pointer-events: none;
  transition: width 160ms ease, height 160ms ease, margin 160ms ease, background 160ms ease;
}
.cursor.big { width: 34px; height: 34px; margin: -17px 0 0 -17px; background: var(--coral); }
html.has-cursor, html.has-cursor a, html.has-cursor button { cursor: none; }

/* Bio paragraph with blur-in reveal */
.bio { padding: 7rem 0; }
.bio p {
  font-size: clamp(1.45rem, 2.9vw, 2.05rem);
  line-height: 1.38;
  letter-spacing: -0.012em;
  font-weight: 500;
  margin: 0;
  max-width: 50rem;
}
.bio em { font-family: var(--serif); font-weight: 700; font-style: italic; letter-spacing: 0; }
.bio .w { display: inline-block; filter: blur(8px); opacity: 0.12; transition: filter 600ms ease, opacity 600ms ease; }
.bio.in .w { filter: none; opacity: 1; }
.inline-thumb { display: inline-block; width: 1.5em; height: 0.92em; border-radius: 0.1em; overflow: hidden; vertical-align: -0.14em; margin: 0 0.04em; }
.inline-thumb svg { width: 100%; height: 100%; display: block; }

.todo { background: rgba(242, 183, 5, 0.28); border-radius: 0.15em; padding: 0 0.15em; }

/* Sections */
section.block { padding: 5rem 0; border-top: 1px solid var(--rule); }
.block .wrap { max-width: 56rem; }
h2 { font-size: 2rem; font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; margin: 0; }
.block p { margin: 0 0 1rem; }
.block p:last-child { margin-bottom: 0; }
.block .reveal { max-width: 46rem; }

/* Section headings: big, lowercase, scrambled in once, one letter swapped for a math object */
h2.sh {
  font-size: clamp(2.7rem, 7vw, 5rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: var(--lh);
  margin: 0 0 2.6rem;
  white-space: nowrap;
}
h2.sh .objslot { margin: 0 0.07em; }
h2.sh .objslot .o svg { transition: transform 700ms cubic-bezier(.2, 1.6, .4, 1); }
h2.sh:hover .objslot .o svg { transform: rotate(150deg); }

/* Content that rises in with a little bounce once its section is reached */
.reveal > * { opacity: 0; transform: translateY(16px); }
.block.in .reveal > * {
  opacity: 1; transform: none;
  transition: opacity 450ms ease, transform 650ms cubic-bezier(.2, 1.45, .4, 1);
  transition-delay: calc(var(--i, 0) * 70ms + 380ms);
}

.cv { display: grid; grid-template-columns: 9.5rem 1fr; margin: 0; }
.cv dt, .cv dd { margin: 0; padding: 0.85rem 0; border-top: 1px solid var(--rule); }
.cv dt { color: var(--muted); font-size: 0.98rem; padding-top: 0.95rem; }
.cv dt:first-of-type, .cv dt:first-of-type + dd { border-top: 0; padding-top: 0.2rem; }
@media (max-width: 30rem) {
  .cv { grid-template-columns: 1fr; }
  .cv dt { padding-bottom: 0; }
  .cv dd { border-top: 0; padding-top: 0.15rem; }
}

.steps { list-style: none; padding: 0; margin: 0; }
.steps li { display: grid; grid-template-columns: 2.9rem 1fr; margin-bottom: 1.2rem; align-items: start; }
.steps .num {
  display: inline-grid; place-items: center;
  width: 1.9rem; height: 1.9rem;
  border-radius: 0.4rem;
  background: var(--c);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  margin-top: 0.05rem;
  transition: transform 300ms cubic-bezier(.2, 1.6, .4, 1);
}
.steps li:hover .num { transform: rotate(-8deg) scale(1.08); }
.steps li:nth-child(1) { --c: var(--blue); }
.steps li:nth-child(2) { --c: var(--mint); }
.steps li:nth-child(3) { --c: var(--gold); }
.steps li:nth-child(4) { --c: var(--coral); }
.steps strong { font-weight: 700; }

/* Booking */
.book-note { color: var(--muted); }
.cal-frame { margin-top: 1.75rem; min-height: 32rem; width: 100%; overflow: hidden; }
.cal-placeholder { border: 1.5px dashed var(--rule); border-radius: 12px; padding: 2rem 1.5rem; color: var(--muted); font-size: 1rem; }

/* Simple header (students page) */
.site-head { padding: 1.4rem 0; }
.wordmark { font-weight: 700; font-size: 1.4rem; letter-spacing: -0.02em; text-decoration: none; color: var(--ink); }

/* Tabs (students page) */
.page-intro { padding: 3rem 0 1rem; }
.page-intro h1 { font-size: clamp(2.6rem, 6vw, 4rem); font-weight: 700; letter-spacing: -0.04em; line-height: 1; margin: 0 0 1rem; }
.page-intro .lede { color: var(--muted); font-size: 1.15rem; margin: 0; max-width: 32rem; }
.wrap.narrow, .page-intro .wrap { max-width: 48rem; }
.tabs { display: flex; gap: 0.5rem; margin: 2rem 0 1.5rem; }
.tabs button { font: inherit; font-weight: 600; font-size: 1rem; background: none; border: 1.5px solid var(--rule); border-radius: 999px; padding: 0.5rem 1.1rem; color: var(--muted); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }
.tabs button:hover:not([aria-selected="true"]) { color: var(--ink); border-color: var(--ink); }
.panel[hidden] { display: none; }
.policy { font-size: 0.98rem; color: var(--muted); margin-top: 2.5rem; max-width: 36rem; }

/* Footer */
.site-foot { border-top: 1px solid var(--rule); padding: 2rem 0 5rem; font-size: 0.98rem; color: var(--muted); }
.site-foot .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

@media (max-width: 52rem) {
  section.block { padding: 3.5rem 0; }
  h2.sh { margin-bottom: 1.8rem; }
  .bio { padding: 4.5rem 0 5rem; }
  .card.gray    { left: -6%; top: 56%; width: 52%; height: 26%; }
  .card.pyth    { left: -4%; top: 10%; width: 34%; }
  .card.penrose { left: 8%;  top: 72%; width: 22%; }
  .card.orange  { left: 58%; top: 6%;  width: 50%; }
  .card.euler   { left: 72%; top: 15%; width: 32%; }
  .card.sheet   { left: 68%; top: 60%; width: 34%; }
}

@media (max-width: 30rem) {
  .wrap { padding: 0 1rem; }
  .corner { font-size: 1.25rem; }
  .corner.tl, .corner.tr { top: 1rem; }
  .corner.bl, .corner.br { bottom: 1rem; }
  .corner.tl, .corner.bl { left: 1rem; }
  .corner.tr, .corner.br { right: 1rem; }
  .hero-cta { bottom: 3.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bio .w { filter: none; opacity: 1; transition: none; }
  .card { opacity: 1; transform: none; }
  .hero-cta { opacity: 1; transform: translate(-50%, 0); }
  .caret { animation: none; }
  .reveal > *, .block.in .reveal > * { opacity: 1; transform: none; transition: none; }
}