:root {
  --ground: #eef1f1;
  --surface: #ffffff;
  --ink: #10191a;
  --ink-2: #34474c;
  --muted: #63767b;
  --rule: #d3dbdd;
  --accent: #06686c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #0c1214;
    --surface: #141c1f;
    --ink: #e2eaeb;
    --ink-2: #b3c3c6;
    --muted: #8b9da1;
    --rule: #253336;
    --accent: #55cfca;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: 44rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 5rem;
}

header {
  border-bottom: 2px solid var(--ink);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}

h1 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 0.4rem;
}

h2 {
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 0.7rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}

h3 { font-size: 1.02rem; margin: 1.6rem 0 0.4rem; }

p, li { color: var(--ink-2); }
li { margin-bottom: 0.35rem; }

a { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.lede { font-size: 1.05rem; color: var(--ink-2); margin: 0; }

.meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.6rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 1.1rem 1.3rem;
  margin: 1.4rem 0;
}

.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card p:first-child { margin-top: 0; }

.tw { overflow-x: auto; }

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 28rem;
  font-size: 0.94rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

th, td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

th {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  white-space: nowrap;
}

tbody tr:last-child td { border-bottom: none; }

footer {
  margin-top: 3.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--muted);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
  background: var(--ground);
  border: 1px solid var(--rule);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.todo {
  background: #fff4e0;
  border: 1px solid #e0a45c;
  color: #6b3f00;
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  margin: 1.4rem 0;
  font-size: 0.94rem;
}

@media (prefers-color-scheme: dark) {
  .todo { background: #2e2314; border-color: #7a5a2a; color: #e8c690; }
}