:root {
  --bg: #e9e4db;
  --text: #2a2723;
  --heading: #151310;
  --muted: #6f685e;
  --link: #9a4a1c;
  --link-hover: #c4632b;
  --glass: rgba(250, 247, 241, 0.76);
  --glass-border: rgba(40, 32, 22, 0.10);
  --glass-strong: rgba(253, 251, 247, 0.94);
  --glass-border-strong: rgba(40, 32, 22, 0.2);
  --chip: rgba(250, 247, 241, 0.62);
  --chip-active: #1b1814;
  --chip-active-text: #f6f2ea;
  --shadow: 0 24px 60px -24px rgba(40, 28, 12, 0.35);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d0c0b;
    --text: #d9d3c9;
    --heading: #f4efe7;
    --muted: #958c80;
    --link: #f0a56b;
    --link-hover: #ffc796;
    --glass: rgba(18, 16, 14, 0.70);
    --glass-border: rgba(255, 240, 220, 0.09);
    --glass-strong: rgba(30, 27, 24, 0.9);
    --glass-border-strong: rgba(255, 240, 220, 0.2);
    --chip: rgba(20, 18, 16, 0.55);
    --chip-active: #f4efe7;
    --chip-active-text: #151310;
    --shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.7);
  }
}

:root[data-theme="dark"] {
  --bg: #0d0c0b;
  --text: #d9d3c9;
  --heading: #f4efe7;
  --muted: #958c80;
  --link: #f0a56b;
  --link-hover: #ffc796;
  --glass: rgba(18, 16, 14, 0.70);
  --glass-border: rgba(255, 240, 220, 0.09);
  --glass-strong: rgba(30, 27, 24, 0.9);
  --glass-border-strong: rgba(255, 240, 220, 0.2);
  --chip: rgba(20, 18, 16, 0.55);
  --chip-active: #f4efe7;
  --chip-active-text: #151310;
  --shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.7);
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.8s var(--ease), color 0.8s var(--ease);
}

.js body { overflow: hidden; }

a { color: var(--link); text-decoration: none; transition: color 0.2s ease; }
a:hover, a:focus-visible { color: var(--link-hover); }
b, strong { font-weight: 600; color: var(--heading); }
code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.85em;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--glass-border);
  color: var(--heading);
}
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--link); outline-offset: 3px; }

/* ---------- Scene ---------- */

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
}
#scene.dragging { cursor: grabbing; }
#scene.pointing { cursor: pointer; }

/* ---------- Loader ---------- */

#loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-content: center;
  gap: 18px;
  background: var(--bg);
  transition: opacity 1.4s var(--ease), visibility 1.4s;
}
#loader p {
  margin: 0;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: center;
}
#loader .bar {
  width: 160px;
  height: 1px;
  background: var(--glass-border);
  overflow: hidden;
}
#loader .bar span {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--heading);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.4s var(--ease);
}
.loaded #loader { opacity: 0; visibility: hidden; }

/* ---------- Chrome ---------- */

.brand, .actions, .dock, .hint {
  position: fixed;
  z-index: 10;
  transition: opacity 1s var(--ease), transform 1s var(--ease);
}
.js:not(.loaded) .brand,
.js:not(.loaded) .actions,
.js:not(.loaded) .dock,
.js:not(.loaded) .hint { opacity: 0; transform: translateY(8px); }

.brand {
  top: max(28px, env(safe-area-inset-top));
  left: 32px;
  pointer-events: none;
  transition-delay: 0.5s;
}
.brand h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--heading);
  line-height: 1.2;
}
.brand p {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text);
  opacity: 0.8;
}
.brand h1, .brand p { text-shadow: 0 0 18px var(--bg), 0 0 6px var(--bg); }

.actions {
  top: max(26px, env(safe-area-inset-top));
  right: 28px;
  display: flex;
  gap: 10px;
  transition-delay: 0.6s;
}
.icon-btn {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--chip);
  color: var(--heading);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  cursor: pointer;
  transition: transform 0.4s var(--ease), background 0.4s ease;
}
.icon-btn:hover { transform: translateY(-1px) scale(1.05); color: var(--heading); }
.icon-sun { display: none; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

.dock {
  left: 50%;
  bottom: max(28px, env(safe-area-inset-bottom));
  translate: -50% 0;
  display: flex;
  gap: 4px;
  padding: 5px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--chip);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  transition-delay: 0.7s;
}
.dock button {
  border: 0;
  background: transparent;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.5s var(--ease), color 0.5s var(--ease);
}
.dock button span {
  margin-right: 7px;
  font-size: 11px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  transition: color 0.5s var(--ease);
}
.dock button:hover { background: var(--glass-border); }
.dock button.active { background: var(--chip-active); color: var(--chip-active-text); }
.dock button.active span { color: inherit; opacity: 0.6; }

.hint {
  right: 32px;
  bottom: max(34px, env(safe-area-inset-bottom));
  margin: 0;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--chip);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  font-size: 12px;
  color: var(--text);
  pointer-events: none;
  transition-delay: 1.1s;
}
.hint.gone { opacity: 0; transition-delay: 0s; }

/* ---------- Object tags ---------- */

#tags { position: fixed; inset: 0; pointer-events: none; z-index: 5; transition: opacity 1s var(--ease) 0.9s; }
.js:not(.loaded) #tags { opacity: 0; }
.tag {
  position: absolute;
  left: 0;
  top: 0;
  padding: 5px 12px 5px 23px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--heading);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  white-space: nowrap;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  translate: -50% calc(-100% - 6px);
  scale: 0.94;
  transition: opacity 0.45s var(--ease), scale 0.45s var(--ease), background 0.6s var(--ease), border-color 0.6s var(--ease);
  will-change: transform;
}
.tag::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--link);
  transition: transform 0.6s var(--ease);
}
.tag.on { opacity: 1; scale: 1; pointer-events: auto; }
.tag.hot { background: var(--glass-strong); border-color: var(--glass-border-strong); }
.tag.hot::before { transform: scale(1.35); }

/* ---------- Panels ---------- */

#panels { position: relative; z-index: 20; }

.js .panel {
  position: fixed;
  top: 96px;
  bottom: 96px;
  left: 32px;
  width: min(440px, calc(100vw - 64px));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 30px 32px 28px;
  border-radius: 20px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(22px) saturate(1.2);
  backdrop-filter: blur(22px) saturate(1.2);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-18px);
  transition: opacity 0.6s var(--ease), transform 0.8s var(--ease), visibility 0.8s;
  scrollbar-width: thin;
}
.js .panel.open {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition-delay: 0.25s;
}
.js .panel > * {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.7s var(--ease), transform 0.9s var(--ease);
}
.js .panel.open > * { opacity: 1; transform: none; }
.js .panel.open > :nth-child(2) { transition-delay: 0.30s; }
.js .panel.open > :nth-child(3) { transition-delay: 0.36s; }
.js .panel.open > :nth-child(4) { transition-delay: 0.42s; }
.js .panel.open > :nth-child(5) { transition-delay: 0.48s; }
.js .panel.open > :nth-child(6) { transition-delay: 0.54s; }
.js .panel.open > :nth-child(n+7) { transition-delay: 0.60s; }

.panel .close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}
.panel .close:hover { background: var(--glass-border); color: var(--heading); }

.panel .kicker {
  margin: 0 0 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.panel h2 {
  margin: 0 0 16px;
  font-size: 24px;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--heading);
}
.panel h3 {
  margin: 22px 0 6px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--heading);
}
.panel h3 a { color: inherit; }
.panel h3 a:hover { color: var(--link); }
.panel p { margin: 0 0 12px; }
.panel .muted { color: var(--muted); }

.who { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; }
.who img { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; }
.who h2 { margin: 0; }

.links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 16px !important; }
.links a { font-weight: 500; font-size: 14px; }
.links a::after { content: ' ↗'; font-size: 0.8em; opacity: 0.55; }
.links a[href^="mailto"]::after { content: ''; }

.paper {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--glass-border);
}
.paper h3 { margin-top: 4px; }
.paper .venue {
  margin: 0;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--link);
}
.paper .authors { font-size: 13px; color: var(--muted); }
.paper .authors a { color: var(--text); }
.paper .authors a:hover { color: var(--link); }

.interests { margin: 0; }
.interests dt {
  margin-top: 16px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--link);
}
.interests dd { margin: 2px 0 0; }

/* ---------- Small screens: bottom sheet ---------- */

@media (max-width: 720px) {
  .brand { left: 20px; top: max(20px, env(safe-area-inset-top)); }
  .brand h1 { font-size: 19px; }
  .actions { right: 16px; top: max(18px, env(safe-area-inset-top)); }
  .hint { display: none; }
  .dock { bottom: max(16px, env(safe-area-inset-bottom)); max-width: calc(100vw - 24px); }
  .dock button { padding: 8px 11px; }
  .dock button span { display: none; }
  .js .panel {
    top: auto;
    left: 8px;
    right: 8px;
    bottom: 8px;
    width: auto;
    max-height: 56vh;
    padding: 26px 22px 22px;
    transform: translateY(24px);
  }
  .panel h2 { font-size: 21px; }
}

/* ---------- Without WebGL or JS: a plain readable page ---------- */

.no-js #scene, .no-webgl #scene,
.no-js #loader, .no-webgl #loader,
.no-js .dock, .no-webgl .dock,
.no-js .hint, .no-webgl .hint,
.no-js #tags, .no-webgl #tags { display: none; }

.no-js body, .no-webgl body { overflow: auto; }
.no-js .brand, .no-webgl .brand,
.no-js .actions, .no-webgl .actions { position: absolute; opacity: 1; transform: none; }
.no-js #panels, .no-webgl #panels {
  max-width: 640px;
  margin: 0 auto;
  padding: 120px 20px 60px;
}
.no-js .panel, .no-webgl .panel {
  position: static;
  width: auto;
  margin-bottom: 20px;
  opacity: 1;
  visibility: visible;
  transform: none;
  overflow: visible;
}
.no-js .panel > *, .no-webgl .panel > * { opacity: 1; transform: none; }
.no-js .panel .close, .no-webgl .panel .close { display: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; transition-delay: 0s !important; }
}