:root {
  --bg: #1b1a19;
  --fg: #e8e5df;
  --muted: #aaa59e;
  --border: #302e2b;
  --rule: rgba(170, 165, 158, 0.3);
  color-scheme: dark;
}

.light {
  --bg: #f6f4ef;
  --fg: #1b1a19;
  --muted: #6e6a63;
  --border: #dfdbd2;
  --rule: rgba(110, 106, 99, 0.35);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia,
    "Times New Roman", serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: color-mix(in srgb, var(--fg) 18%, transparent);
}

a.link,
button.link {
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: var(--rule);
  text-underline-offset: 3px;
  transition: color 0.2s, text-decoration-color 0.2s;
}

a.link:hover,
button.link:hover {
  color: var(--fg);
  text-decoration-color: var(--muted);
}

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

/* Layout */

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.page {
  display: grid;
  gap: 2.5rem;
}

article {
  max-width: 580px;
}

aside {
  display: none;
}

h1 {
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  margin: 0;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin: 0 0 1rem;
}

section {
  margin-top: 3.5rem;
}

p {
  margin: 0;
}

.prose > p + p {
  margin-top: 1.25rem;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 0.875rem;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.stack li + li {
  margin-top: 0.75rem;
}

/* Bio toggle */

.bio-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 2.5rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.bio-head .modes {
  display: flex;
  gap: 1rem;
}

.bio-head button {
  color: var(--muted);
  text-transform: capitalize;
  transition: color 0.2s;
}

.bio-head button:hover,
.bio-head button[aria-pressed="true"] {
  color: var(--fg);
}

.prose {
  margin-top: 1.25rem;
  animation: fade 0.35s ease-out both;
}

@keyframes fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Right-hand panel */

.panel canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
}

.life canvas {
  cursor: pointer;
  image-rendering: pixelated;
}

.panel-caption {
  margin-top: 0.75rem;
  min-height: 2.6em;
  line-height: 1.5;
}

.panel-caption .gen {
  float: right;
  font-variant-numeric: tabular-nums;
}

.fg {
  color: var(--fg);
}

footer {
  margin-top: 5rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.875rem;
  color: var(--muted);
}

@media (min-width: 640px) {
  main {
    padding: 3.5rem 2rem;
  }
  h1 {
    font-size: 2.65rem;
  }
}

@media (min-width: 1024px) {
  main {
    padding: 3.5rem 2.5rem;
  }
  .page {
    grid-template-columns: minmax(0, 1fr) 400px;
    gap: 5rem;
  }
  aside {
    display: block;
  }
  /* A viewport-tall sticky box keeps the panel vertically centered while
     the text scrolls past it. The negative margins swallow main's vertical
     padding so a short page is exactly one viewport tall, not taller. */
  aside > div {
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    margin: -3.5rem 0;
  }
  aside > div > * {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .prose {
    animation: none;
  }
}