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:root {
  color-scheme: light dark;
  --bg: #F4F2EE;
  --paper: #FFFFFF;
  --ink: #141414;
  --muted: #6B6B66;
  --line: #E4E1DA;
  --yellow: #F5B400;
  --yellow-soft: #FFF3CC;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0B0B;
    --paper: #161616;
    --ink: #F4F2EE;
    --muted: #9A9A94;
    --line: #2A2A2A;
    --yellow: #FFC61A;
    --yellow-soft: #2A2410;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: inherit; text-decoration-color: var(--yellow); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { background: var(--yellow-soft); }

header.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  max-width: 760px; margin: 0 auto; padding: 20px 20px 0;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 700; }
.brand .mark {
  width: 36px; height: 36px; border-radius: 9px; background: var(--yellow); flex: none;
}
.brand .mark svg { width: 100%; height: 100%; display: block; }
.brand small { display: block; font-weight: 400; color: var(--muted); font-size: 13px; line-height: 1.2; }
nav a { margin-left: 16px; font-size: 15px; }

main { max-width: 760px; margin: 0 auto; padding: 24px 20px 64px; }
article {
  background: var(--paper); border: 1px solid var(--line); border-radius: 18px;
  padding: 32px 28px;
}
@media (max-width: 480px) { article { padding: 24px 18px; border-radius: 14px; } nav a { margin-left: 10px; } }

h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.01em; }
h2 { font-size: 21px; margin: 36px 0 10px; letter-spacing: -0.01em; }
h3 { font-size: 17px; margin: 24px 0 6px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; }
.meta { color: var(--muted); font-size: 15px; margin-bottom: 20px; }
.summary {
  background: var(--yellow-soft); border-left: 4px solid var(--yellow);
  border-radius: 10px; padding: 14px 16px; margin: 20px 0 8px; font-weight: 500;
}
table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0 20px; }
th, td { text-align: left; vertical-align: top; padding: 10px 8px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }
.table-wrap { overflow-x: auto; }
code { font: 14px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--bg); padding: 1px 6px; border-radius: 6px; }
.todo { background: #FFE9A8; color: #3A2E00; padding: 0 6px; border-radius: 6px; font-weight: 600; }
@media (prefers-color-scheme: dark) { .todo { background: #4A3B00; color: #FFE9A8; } }

.cards { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; margin-top: 20px; }
@media (max-width: 560px) { .cards { grid-template-columns: 1fr; } }
.card {
  display: block; text-decoration: none; background: var(--paper); border: 1px solid var(--line);
  border-radius: 16px; padding: 20px;
}
.card:hover { border-color: var(--yellow); background: var(--paper); }
.card strong { display: block; font-size: 18px; margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 15px; }
.hero { padding: 24px 0 8px; }
.hero h1 { font-size: 38px; }
.hero p { font-size: 19px; color: var(--muted); max-width: 560px; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; padding: 0; list-style: none; }
.pills li { background: var(--paper); border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px; font-size: 14px; margin: 0; }

footer { max-width: 760px; margin: 0 auto; padding: 0 20px 40px; color: var(--muted); font-size: 14px; }
footer a { margin-right: 14px; }