:root {
  --paper: #fafafa;
  --surface: #f2f2f2;
  --ink: #222222;
  --muted: #666666;
  --accent: #222222;
  --line: #dddddd;
  --page-width: 832px;
  --gutter: clamp(24px, 4vw, 56px);
  --ease-out: cubic-bezier(.23, 1, .32, 1);
  --motion-fast: 140ms;
  --motion-ui: 200ms;
  --motion-enter: 240ms;
  color: var(--ink);
  background: var(--paper);
  color-scheme: light;
  -webkit-font-smoothing: antialiased;
  text-size-adjust: 100%;
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--paper); }
h1, h2, h3 { margin: 0; font-family: var(--font-mono); font-weight: 400; color: var(--ink); text-wrap: balance; }
h1 { margin-bottom: 24px; font-size: clamp(28px, 3vw, 38px); line-height: 1.3; letter-spacing: -.055em; }
h2 { margin-bottom: 20px; font-size: 24px; line-height: 1.4; letter-spacing: -.045em; }
h3 { margin-bottom: 16px; font-size: 18px; line-height: 1.5; letter-spacing: -.035em; }
p { margin: 0 0 20px; color: var(--muted); font-family: var(--font-mono); font-size: 15px; line-height: 1.85; text-wrap: pretty; }
a { color: var(--ink); text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, a, summary, input { -webkit-tap-highlight-color: transparent; }
button, a, summary { touch-action: manipulation; }
:focus-visible { outline: none; box-shadow: none; }
a:focus-visible, button:focus-visible, summary:focus-visible { background-color: #e8e8e8; color: var(--ink); }
canvas:focus-visible { filter: brightness(.96); }
[hidden] { display: none !important; }
.icon { display: inline-block; width: 16px; height: 16px; flex-shrink: 0; vertical-align: middle; pointer-events: none; stroke-width: 1.6; }
.site-header { width: min(100%, var(--page-width)); margin-inline: auto; padding: 32px var(--gutter); display: flex; flex-direction: column; align-items: flex-start; gap: 12px; font-size: 13px; }
.site-brand { display: inline-flex; align-items: center; color: var(--ink); font-size: 15px; line-height: 1.5; letter-spacing: -.045em; }
.header-context { display: inline-flex; align-items: center; gap: 8px; min-height: 36px; color: var(--muted); font-size: 12px; }
.section-index { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; font-size: 13px; }
.section-index a { display: inline-flex; align-items: center; min-height: 36px; color: var(--muted); transition: color 140ms ease; }
.section-index a[aria-current=location] { color: var(--accent); }
.button, .text-button, .quiet-link { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 42px; padding: 10px 18px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink); background: var(--paper); font-family: var(--font-mono); font-size: 13px; font-weight: 400; line-height: 1.5; text-decoration: none; cursor: pointer; transition: transform var(--motion-fast) var(--ease-out), background-color var(--motion-fast) ease, border-color var(--motion-fast) ease, color var(--motion-fast) ease; }
.button-primary { color: #fff; border-color: var(--accent); background: var(--accent); }
.page-link, .button-link, .quiet-link { display: inline-flex; align-items: center; gap: 10px; min-height: 40px; padding: 0; border: 0; border-radius: 0; background: transparent; color: var(--ink); font-family: var(--font-mono); font-size: 13px; font-weight: 400; line-height: 1.6; text-decoration: none; transition: opacity var(--motion-fast) ease; }
p a:not(.page-link):not(.button) { color: var(--ink); font-weight: 500; }
.button .icon, .quiet-link .icon { transition: transform var(--motion-ui) var(--ease-out), background-color var(--motion-fast) ease; }
.button:active:not(:focus-visible), .text-button:active:not(:focus-visible), .quiet-link:active:not(:focus-visible) { transform: scale(.97); }
button:disabled { opacity: .55; cursor: wait; }
.icon-button { width: 42px; height: 42px; padding: 12px; }
.icon-button .control-label, .visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.explore-page { padding-left: 0; }
.explore-page .site-header { position: fixed; z-index: 10; inset: max(20px, env(safe-area-inset-top)) auto auto max(20px, env(safe-area-inset-left)); width: auto; margin: 0; padding: 0; flex-direction: row; align-items: center; gap: 0; overflow: visible; background: transparent; }
.explore-page .site-header a { display: inline-flex; align-items: center; min-height: 28px; color: var(--ink); font-size: 12px; letter-spacing: normal; }
.study-details { background: transparent; }
.study-details > summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; list-style: none; padding: 18px 0; cursor: pointer; color: var(--ink); font-family: var(--font-mono); font-size: 13px; line-height: 1.6; }
.study-details > summary::-webkit-details-marker { display: none; }
.study-details > summary .disclosure-chevron { width: 28px; height: 28px; padding: 6px; border: 1px solid var(--line); border-radius: 4px; color: var(--accent); transition: transform var(--motion-ui) var(--ease-out); }
.study-details[open] > summary .disclosure-chevron { transform: rotate(180deg); }
.disclosure-body { padding: 8px 0 24px; }
.disclosure-body > :first-child { margin-top: 0 !important; }
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: page-out 140ms ease both; }
::view-transition-new(root) { animation: page-in 240ms var(--ease-out) both; }
@keyframes page-out { to { opacity: 0; } }
@keyframes page-in { from { opacity: 0; transform: translateY(5px); } }
@media (hover: hover) and (pointer: fine) {
  .section-index a:hover { color: var(--accent); }
  a:not(.button):hover { opacity: .7; }
  .button:hover, .text-button:hover { background: var(--surface); border-color: #aaaaaa; }
  .button-primary:hover { background: #444444; border-color: #444444; }
  .button-link:hover, .quiet-link:hover { background: transparent; color: var(--accent); }

  .study-details > summary:hover { color: var(--accent); }
}
@media (max-width: 600px) {
  h1 { font-size: 28px; } h2 { font-size: 22px; }
  .site-header { gap: 16px; padding-block: 24px 12px; }

  .study-details > summary { padding: 16px 0; }
  .disclosure-body { padding: 8px 0 20px; }
}
@media (prefers-reduced-motion: reduce) {
  @view-transition { navigation: none; }
  *, *::before, *::after { scroll-behavior: auto !important; }
  .button, .text-button, .quiet-link, .button .icon, .quiet-link .icon, .disclosure-chevron, .section-index a { transition: none !important; }
  .button:active, .text-button:active, .quiet-link:active, .button-link:hover .icon:last-child { transform: none !important; }
}
html:has(.process-story) { scroll-behavior: smooth; }
:root[data-input=keyboard] { scroll-behavior: auto; }
:root[data-input=keyboard] :is(a, button, summary, .disclosure-chevron) { transition: none; }