@font-face {
  font-family: "Saira";
  src: url("assets/fonts/saira-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --red: #ed1b2f;
  --ink: #002452;
  --soft: #5c6778;
  --rule: #e3e6eb;
  --line-strong: #cfd5de;
  --font: "Saira", "Helvetica Neue", Arial, sans-serif;
  --strip: clamp(5.5rem, 9vw, 9rem);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: var(--font);
  font-size: 1.125rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, p, ul { margin: 0; padding: 0; }
h1, h2 { font-weight: inherit; }
ul { list-style: none; }

a { color: var(--red); text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }

.skip {
  position: absolute;
  left: 7rem;
  top: -4rem;
  z-index: 4;
  padding: 0.5rem 1rem;
  background: #fff;
  color: var(--ink);
}
.skip:focus { top: 1rem; }

/* Holds the scroll cue, which stays put while the page moves. */
.stage {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.moving .stage { display: block; }

/* The logo sits inside the side panel, so it scrolls exactly with the headline. */
.piece {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  overflow: visible;
  pointer-events: none;
  will-change: transform;
}
.moving .piece { display: block; }

/* An outline of the whole logo, which scrolling traces over and then fills. */
.ghost { fill: none; stroke-width: 0.5; }
.ghost-a { stroke: var(--ink); opacity: 0.3; }
.ghost-l { stroke: var(--red); opacity: 0.35; }
.trace {
  fill: none;
  stroke-width: 0.5;
  stroke-linejoin: miter;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}
.trace-a { stroke: var(--ink); }
.trace-l { stroke: var(--red); }
.fill-a, .slot .piece-a { fill: var(--ink); }
.fill-l, .slot .piece-l { fill: var(--red); }

.cue {
  position: absolute;
  bottom: 1.75rem;
  left: calc((100% + var(--strip)) / 2);
  translate: -50% 0;
  color: var(--soft);
  font-size: 0.875rem;
}

/* Two shards, McGill red and Queen's blue, split by the logo's diagonal cut.
   script.js moves the cut up the strip as the page scrolls, so blue takes over. */
.strip {
  --split: 72%;
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 2;
  width: var(--strip);
  background: linear-gradient(210deg, var(--red) 0 var(--split), #fff var(--split) calc(var(--split) + 1.5%), var(--ink) calc(var(--split) + 1.5%));
  clip-path: polygon(0 0, 62% 0, 100% 100%, 0 100%);
}


.mark {
  position: fixed;
  top: 1.75rem;
  left: 1rem;
  z-index: 3;
  width: 2.25rem;
}
.mark svg { display: block; fill: #fff; }

/* One side stays pinned while the other scrolls. */
.page {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 42fr) minmax(0, 58fr);
}

.side {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 2rem 2rem 2rem calc(var(--strip) + clamp(1.25rem, 2.5vw, 2.5rem));
}

.column {
  position: relative;
  z-index: 1;
  max-width: 54rem;
  padding: 3rem clamp(2rem, 5vw, 5rem) 0 clamp(1rem, 2vw, 2rem);
}
.moving .column { padding-top: calc(var(--pin) + 42vh); }

/* Small type */
.top, h2, .pubs span, footer {
  font-size: 0.875rem;
  line-height: 1.5;
}

.top a { color: var(--ink); text-decoration: none; }
.top a:hover { color: var(--red); }
.name { font-weight: 500; }
.top ul { display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; margin-top: 0.5rem; }
.top li a { color: var(--soft); }

/* Opening */
.opening { position: relative; margin-block: auto; }
.slot { display: block; width: clamp(8rem, 24vh, 15rem); overflow: visible; }
.moving .slot { visibility: hidden; }

h1 {
  margin-top: clamp(1.25rem, 3.5vh, 2.5rem);
  font-size: clamp(2.25rem, 3.5vw, 4.5rem);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.015em;
}
h1 span, h1 em { display: block; }

/* The headline starts as an outline and fills from left to right. */
.moving h1 span, .moving h1 em {
  --fill: 0%;
  width: fit-content;
  /* Keeps the fill from cutting off the descenders. */
  padding-bottom: 0.2em;
  margin-bottom: -0.2em;
  color: transparent;
  -webkit-text-stroke: 0.6px var(--line);
  background: linear-gradient(90deg, var(--line) var(--fill), transparent var(--fill));
  -webkit-background-clip: text;
  background-clip: text;
}
.moving h1 span { --line: var(--ink); }
.moving h1 em { --line: var(--red); }
h1 em { color: var(--red); font-style: normal; }

/* Team size as counts only: the site names no one but the director.
   Columns size themselves, so a category can be added when it applies. */
.team { max-width: 26rem; margin-top: clamp(1.25rem, 3.5vh, 2.5rem); }
.team dl {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  margin: 0;
  border-top: 1px solid var(--line-strong);
}
.team dl > div {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  padding: 0.6rem 0.5rem 0 0;
}
.team dd {
  margin: 0;
  font-size: clamp(1.5rem, 2.2vw, 2rem);
  font-weight: 300;
  line-height: 1.1;
}
.team dl > div:nth-child(odd) dd { color: var(--red); }
.team dt { margin-top: 0.2rem; color: var(--soft); font-size: 0.75rem; line-height: 1.25; }
.team p { margin-top: 0.75rem; color: var(--soft); font-size: 0.75rem; }

/* Sections: a quiet label above the content, divided by a hairline */
.row {
  display: grid;
  gap: 1.75rem;
  padding-block: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--rule);
  scroll-margin-top: 0;
}
.row:first-child { border-top: 0; padding-top: 0; }
h2 { color: var(--soft); }

/* Research */
.areas {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
}
/* Boxes with one corner cut at the logo's 60 degree angle. The box itself draws
   the border, ::before the white inside, and ::after the navy hover fill. */
.areas > div {
  --cut: polygon(0 0, calc(100% - 1.25rem) 0, 100% 2.165rem, 100% 100%, 0 100%);
  position: relative;
  padding: 1.5rem 1.75rem 1.6rem 1.5rem;
  background: var(--line-strong);
  clip-path: var(--cut);
}
.areas > div::before, .areas > div::after {
  content: "";
  position: absolute;
  clip-path: var(--cut);
}
.areas > div::before { inset: 1px; background: #fff; }
.areas > div::after {
  inset: 0;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
/* An odd box out takes the full width, so the grid has no gap. */
.areas > div:last-child:nth-child(odd) { grid-column: 1 / -1; }
.areas dt, .areas dd { position: relative; z-index: 1; transition: color 0.25s ease; }
.areas dt { font-size: 1.3125rem; font-weight: 400; line-height: 1.25; }
.areas dt::before {
  content: "";
  display: block;
  width: 1.75rem;
  height: 3px;
  margin-bottom: 1rem;
  background: var(--red);
}
.areas > div:nth-child(even) dt::before { background: var(--ink); }
.areas dd { margin: 0.6rem 0 0; color: var(--soft); font-size: 1rem; line-height: 1.5; }

@media (hover: hover) {
  .areas > div:hover::after { transform: scaleX(1); }
  .areas > div:hover dt { color: #fff; }
  .areas > div:hover dd { color: #d6dde8; }
  .areas > div:nth-child(even):hover dt::before { background: #fff; }
}

/* Publications */
.pubs li + li { margin-top: 1.75rem; }
.pubs cite {
  display: block;
  max-width: 44rem;
  font-style: normal;
  font-size: 1.25rem;
  line-height: 1.3;
}
.pubs span { display: block; margin-top: 0.3rem; color: var(--soft); }
.more { margin-top: 2rem; font-size: 0.875rem; }
.pubs cite a { color: inherit; text-decoration: none; }
.pubs cite a:hover { color: var(--red); text-decoration: underline; }
.all { margin-top: 2rem; }
.all summary {
  width: fit-content;
  color: var(--red);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
}
.all[open] summary { margin-bottom: 1.75rem; }
.moving .all .pubs li { opacity: 1; translate: none; transition: none; }

footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 2.5rem;
  padding-block: 2rem 3rem;
  border-top: 1px solid var(--rule);
  color: var(--soft);
}

/* Research and papers arrive as they scroll into view. */
.moving .row h2, .moving .areas > div, .moving .pubs li {
  opacity: 0;
  translate: 0 2rem;
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), translate 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.moving .seen { opacity: 1 !important; translate: 0 0 !important; }

/* Not-found page */
.lost {
  padding: 22vh 2rem 0 calc(var(--strip) + clamp(2rem, 5vw, 5rem));
}
.lost h1 { font-size: clamp(3rem, 7vw, 6rem); margin-top: 0; }
.lost p { max-width: 31rem; margin-top: 2rem; font-size: 1.375rem; font-weight: 300; }

@media (max-width: 56rem) {
  /* The strip becomes a wedge across the top of the page. */
  .strip {
    position: absolute;
    inset: 0 0 auto 0;
    width: auto;
    height: 5.25rem;
    background: linear-gradient(120deg, var(--red) 0 70%, #fff 70% 71%, var(--ink) 71%);
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 100%);
  }
  .mark { position: absolute; top: 1rem; left: 1.5rem; }
  .cue { left: 50%; }

  /* No room for two columns: the opening holds still, then the page scrolls normally. */
  .page { display: block; }
  .moving .rail { height: calc(100vh + var(--pin)); }
  .side { position: static; height: auto; padding: 6.25rem 1.5rem 3rem; }
  .moving .side { position: sticky; height: 100vh; padding-bottom: 1.5rem; }
  h1 { font-size: clamp(2.75rem, 13.4vw, 6.5rem); }
  .slot { width: min(42vw, 12rem); }
  .areas { grid-template-columns: minmax(0, 1fr); }
  .areas > div { padding: 1.25rem 1.5rem 1.35rem 1.25rem; }
  .column, .moving .column { padding: 0 1.5rem; }
  .row:first-child { padding-top: 1rem; }
  .lost { padding: 8rem 1.5rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .areas > div::after, .areas dt, .areas dd { transition: none; }
}