:root {
  --fg: #fff;
  --fg-dim: rgba(255, 255, 255, 0.55);
  --bg: #9a9ea6;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --gutter: clamp(16px, 2.6vw, 40px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { background: var(--bg); color: var(--fg); transition: background 0.8s; }

body {
  font: 400 11px/1.35 var(--mono);
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  text-shadow: 0 0 6px rgba(40, 44, 52, 0.35);
  overflow-x: hidden;
}
body.is-loading { overflow: hidden; }

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

#gl, #lines, #callouts {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
}
#gl { display: block; }
#lines, #callouts { pointer-events: none; }
#lines path { fill: none; stroke: rgba(255, 255, 255, 0.85); stroke-width: 1; }

.scroll-space { height: 1600vh; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- loader ---------- */
#loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: var(--bg);
  transition: opacity 0.5s var(--ease), visibility 0.5s, background 0.8s;
}
#loader.done { opacity: 0; visibility: hidden; }
.loader-bar {
  font: 500 11px/1 var(--mono);
  letter-spacing: 0.06em;
  white-space: pre;
  color: #fff;
}

/* HUD stays hidden while the wireframe intro plays */
body.is-intro .hud,
body.is-intro .scroll-hint.ch,
body.is-intro .sound,
body.is-intro .season { opacity: 0; }
.hud, .scroll-hint, .sound, .season { transition: opacity 0.8s var(--ease); }

/* ---------- HUD ---------- */
.hud, .scroll-hint, .sound, .season, .carousel { position: fixed; z-index: 10; }
.hud { inset: 0 0 auto 0; padding: var(--gutter); pointer-events: none; }
.hud a, .hud button { pointer-events: auto; }

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font: 200 clamp(18px, 1.9vw, 28px)/1 "Outfit", sans-serif;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.03em;
  text-shadow: 0 0 18px rgba(40, 44, 52, 0.25);
}
.logo b { font-weight: 800; }
.logo svg { width: 1.45em; height: 1.45em; filter: drop-shadow(0 0 10px rgba(40, 44, 52, 0.25)); }

[data-scramble] { white-space: pre-line; }

.meta { margin-top: 10px; display: grid; gap: 10px; }
.manifesto {
  position: absolute;
  top: var(--gutter);
  right: var(--gutter);
  width: 25ch;
  text-align: right;
}
.manifesto h2 { font: inherit; margin-bottom: 14px; }
.socials { list-style: none; margin-top: 18px; display: flex; justify-content: flex-end; gap: 10px; }
.socials a {
  display: inline-block;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  color: var(--fg);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.3s, color 0.3s;
}
.socials a:hover, .socials a:focus-visible { background: #fff; color: #1e242e; text-shadow: none; outline: none; }

.scroll-hint { left: var(--gutter); bottom: calc(var(--gutter) + 34px); }

.sound {
  left: var(--gutter);
  bottom: var(--gutter);
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 4px 0;
}
.sound b { font-weight: 400; }
.sound .wave { display: none; }
.sound[aria-pressed="true"] .wave { display: block; }
.sound[aria-pressed="true"] .mute { display: none; }
.season {
  left: calc(var(--gutter) + 118px);
  bottom: var(--gutter);
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 4px 0;
}
.season b { font-weight: 400; }

/* big season title that flashes up when the season changes */
#season-title {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  pointer-events: none;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 0.6s var(--ease), transform 1.6s var(--ease);
}
#season-title.show { opacity: 1; transform: scale(1); }
#season-title .big {
  font: 800 clamp(64px, 15vw, 220px)/0.9 "Outfit", sans-serif;
  letter-spacing: -0.05em;
  text-shadow: 0 6px 40px rgba(20, 24, 30, 0.35);
}
#season-title .small { font: 500 12px/1 var(--mono); letter-spacing: 0.3em; text-transform: uppercase; }
.season:hover svg { transform: rotate(90deg); }
.season svg { transition: transform 0.6s var(--ease); }
.sound:focus-visible, .season:focus-visible, .arrow:focus-visible, .carousel a:focus-visible { outline: 1px dashed #fff; outline-offset: 4px; }

/* chapter-bound elements fade with the active chapter */
.ch { opacity: 0; visibility: hidden; transition: opacity 0.6s var(--ease), visibility 0.6s; }
body[data-chapter="0"] .ch-0,
body[data-chapter="1"] .ch-1,
body[data-chapter="2"] .ch-2,
body[data-chapter="3"] .ch-3 { opacity: 1; visibility: visible; }

/* ---------- callouts ---------- */
.callout {
  position: absolute;
  left: 0;
  top: 0;
  padding-bottom: 5px;
  white-space: pre;
  line-height: 1.3;
  text-transform: uppercase;
  will-change: transform, opacity;
  transition: opacity 0.35s;
  opacity: 0;
}
.callout.tag {
  font-size: 10px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  padding: 0 3px;
}

/* ---------- carousel ---------- */
.carousel { inset: 0; pointer-events: none; }
.carousel .arrow {
  position: absolute;
  top: 50%;
  width: 64px;
  height: 40px;
  transform: translateY(-50%);
  pointer-events: auto;
}
.carousel .prev { left: clamp(16px, 13vw, 200px); }
.carousel .next { right: clamp(16px, 13vw, 200px); }
.arrow i { position: absolute; left: 8px; right: 8px; top: 50%; height: 1px; background: #fff; transition: transform 0.4s var(--ease); }
.arrow i::before { content: ""; position: absolute; top: -4px; width: 8px; height: 8px; border: solid #fff; border-width: 1px 0 0 1px; }
.prev i::before { left: 0; transform: rotate(-45deg); }
.next i::before { right: 0; transform: rotate(135deg); }
.prev:hover i { transform: translateX(-6px); }
.next:hover i { transform: translateX(6px); }

.track {
  position: absolute;
  left: 50%;
  bottom: clamp(28px, 6vh, 56px);
  transform: translateX(-50%);
  display: flex;
  gap: 0;
  pointer-events: auto;
}
.track a {
  position: relative;
  width: 150px;
  padding: 14px 0;
  text-align: center;
  color: var(--fg-dim);
  text-decoration: none;
  transition: color 0.4s, opacity 0.4s;
}
.track a[hidden] { display: block; visibility: hidden; }
.track a.active { color: #fff; }
.track a.active::before,
.track a.active::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 12px;
  border: solid #fff;
}
.track a.active::before { left: 18px; border-width: 1px 0 1px 1px; }
.track a.active::after { right: 18px; border-width: 1px 1px 1px 0; }

@media (max-width: 720px) {
  .manifesto { width: 21ch; font-size: 10px; }
  .track a { width: 110px; }
  .carousel .prev { left: 8px; }
  .carousel .next { right: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .ch, .callout, #loader { transition-duration: 0.01s; }
}

body.is-grab { cursor: pointer; }

/* ---------- project overview cards (chapter 1) ---------- */
#project-cards { position: fixed; inset: 0; z-index: 9; pointer-events: none; }
.project-card {
  position: absolute;
  top: 50%;
  width: min(380px, 34vw);
  box-sizing: border-box;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(30, 36, 46, 0.32);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: #fff;
  opacity: 0;
  visibility: hidden;
  transform: translate(var(--dx, 0), -50%);
  transition: opacity 0.5s var(--ease), transform 0.7s var(--ease), visibility 0.5s;
}
.project-card.left { left: max(var(--gutter), 7vw); --dx: -40px; }
.project-card.right { right: max(var(--gutter), 7vw); --dx: 40px; }
.project-card.active { opacity: 1; visibility: visible; pointer-events: auto; --dx: 0px; }
.project-card .num { font: 500 11px/1 var(--mono); letter-spacing: 0.12em; color: rgba(255, 255, 255, 0.75); }
.project-card img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; display: block; }
.project-card h3 { font: 800 30px/1 "Outfit", sans-serif; letter-spacing: -0.03em; margin: 2px 0 0; }
.project-card p { font: 300 15px/1.4 "Outfit", sans-serif; margin: 0; text-shadow: none; }
.project-card .stack { font: 500 11px/1.4 var(--mono); color: rgba(255, 255, 255, 0.75); }
.project-card a {
  align-self: flex-start;
  margin-top: 4px;
  padding: 10px 14px;
  border: 1px solid #fff;
  color: #fff;
  text-decoration: none;
  font: 500 12px/1 var(--mono);
  transition: background 0.3s, color 0.3s;
}
.project-card a:hover, .project-card a:focus-visible { background: #fff; color: #1e242e; }

@media (max-width: 720px), (max-aspect-ratio: 11/10) {
  .project-card { top: auto; bottom: 64px; left: 16px; right: 16px; width: auto; transform: translateY(var(--dx, 0)); }
  .project-card.left, .project-card.right { left: 16px; right: 16px; --dx: 30px; }
  .project-card.active { --dx: 0px; }
  .project-card img { display: none; }
}