:root {
  --ink: #1a1a1a;
  --bg: #fffefa;
  --max: 760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

html:has(#theme-toggle:checked) {
  --ink: #fffefa;
  --bg: #1a1a1a;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s ease, color 0.2s ease;
}

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

.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 140px 24px 100px;
}

.masthead {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin: 0 0 24px;
}

h1 {
  font-size: 42px;
  font-weight: 400;
  line-height: 1;
  margin: 0;
}

.icons {
  display: flex;
  align-items: center;
  gap: 11px;
  padding-top: 10px;
  list-style: none;
  margin: 0;
  padding-left: 0;
}

.icons .icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  line-height: 0;
  cursor: pointer;
}

.icons img {
  display: block;
}

html:has(#theme-toggle:checked) .icons img {
  filter: invert(1);
}

.icon-sun, .icon-moon {
  width: 18px;
  height: 18px;
}

.icon-moon { display: none; }

html:has(#theme-toggle:checked) .icon-sun { display: none; }
html:has(#theme-toggle:checked) .icon-moon { display: block; }

.theme-switch input {
  margin: 0;
}

.one-liner {
  font-size: 14px;
  line-height: 24px;
  margin: 0 0 56px;
}

.view {
  min-height: 404px;
}

#agent-view {
  display: none;
}

.page:has(#agent-toggle:checked) #agent-view {
  display: block;
}

.page:has(#agent-toggle:checked) #human-view {
  display: none;
}

#agent-view h2 {
  font-size: 14px;
  font-weight: 500;
  margin: 0 0 12px;
  color: var(--ink);
}

#agent-view ul {
  margin: 0 0 32px;
  padding: 0 0 0 20px;
}

#agent-view li {
  margin: 0 0 10px;
  padding-left: 4px;
}

#agent-view li::marker {
  color: var(--ink);
  opacity: 0.55;
}

#human-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 24px 0 40px;
}

#origami {
  width: 336px;
  height: 309px;
  max-width: 100%;
  aspect-ratio: 336 / 309;
  display: flex;
  align-items: center;
  justify-content: center;
}

#origami img {
  width: 236px;
  height: auto;
  max-width: 82%;
}

html:has(#theme-toggle:checked) #origami img {
  filter: invert(1);
}

.hint {
  font-size: 14px;
  color: var(--ink);
  opacity: 0.6;
  margin: 0;
  text-align: center;
}

.toggle-row {
  display: flex;
  justify-content: flex-end;
}

.view-switch input {
  margin: 0;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--ink);
  border-radius: 150px;
  padding: 6px 14px;
  cursor: pointer;
  user-select: none;
}

.view-switch:has(input:focus-visible) .pill {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.pill .opt {
  font-size: 12px;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid var(--ink);
  background: transparent;
}

.dot-human {
  background: var(--ink);
}

.page:has(#agent-toggle:checked) .dot-human {
  background: transparent;
}

.page:has(#agent-toggle:checked) .dot-agent {
  background: var(--ink);
}

@media (max-width: 600px) {
  .page {
    padding: 72px 20px 64px;
  }

  h1 {
    font-size: 32px;
  }

  .one-liner {
    max-width: none;
  }

  .one-liner .force-break {
    display: none;
  }

  #origami {
    width: 78vw;
    height: auto;
  }

  .view {
    min-height: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  body { transition: none; }
}