:root {
  --bg: #0e0f13;
  --text: #c6c7cd;
  --bright: #eceef2;
  --muted: #7c7f8a;
  --rule: #24262e;
  --accent: #7aa2f7;
  --chip: #171a21;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Source Serif 4", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  max-width: 44rem;
  margin: 0 auto;
  padding: 5rem 1.5rem 6rem;
  background: var(--bg);
  color: var(--text);
  background-image: radial-gradient(60rem 30rem at 50% -12rem, #1a1f2e 0%, transparent 70%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  animation: fade .5s ease both;
}

@keyframes fade { from { opacity: 0; transform: translateY(6px); } }

::selection { background: var(--accent); color: #0e0f13; }

h1 {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 7vw, 3.2rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--bright);
  margin: 0 0 .75rem;
}

/* section labels: small mono caps with a hairline running to the right edge */
h2, h3, #content h1 {
  display: flex;
  align-items: center;
  gap: .9rem;
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .16em;
  color: var(--muted);
  margin: 3rem 0 1rem;
}
h2::after, h3::after, #content h1::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

p { margin: 0 0 1rem; }

blockquote {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--muted);
  margin: 0 0 2.5rem;
  padding: 0;
  border: 0;
}

a {
  color: var(--bright);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  transition: color .15s, border-color .15s;
}
a:hover { color: var(--accent); border-bottom-color: var(--accent); }

code, .chip {
  font-family: var(--mono);
  font-size: .8rem;
  background: var(--chip);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: .2rem .5rem;
  color: var(--text);
}

.chips { display: flex; flex-wrap: wrap; gap: .5rem; }

ul { list-style: none; margin: 0; padding: 0; }
li { margin-bottom: .45rem; }
li::before {
  content: "—";
  color: var(--rule);
  margin-right: .6rem;
}

/* "* [x] ..." in media.md = already seen; stays on the list, just marked */
#content input[type="checkbox"] { display: none; }
li:has(input:checked)::before { content: "✓"; color: var(--accent); }
li:has(input:checked) strong { color: var(--muted); font-weight: 500; }

strong { color: var(--bright); font-weight: 600; }
em { color: var(--muted); font-style: normal; }

.back {
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .05em;
  border: 0;
  color: var(--muted);
}
.back:hover { border: 0; }

/* trailing reading-list links */
.lists {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.lists a::after { content: " \2192"; }