:root {
  --bg: #1b1916;
  --ink: #f4efe6;
  --muted: #b8aea0;
  --line: #3a342c;
  --sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", ui-sans-serif, system-ui, sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --mono: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --page: min(72rem, calc(100vw - 2.4rem));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font: 16px/1.7 var(--sans);
}
a { color: inherit; }
a:focus-visible { outline: 2px solid #e2a54a; outline-offset: 3px; }
.skip {
  position: absolute; left: 12px; top: 12px;
  padding: 8px 12px; background: #e2a54a; color: #1b1916;
  transform: translateY(-160%);
}
.skip:focus { transform: none; }
.top {
  width: var(--page);
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand {
  font: 700 18px/1 var(--mono);
  letter-spacing: 0.12em;
  text-decoration: none;
}
.top nav { display: flex; gap: 22px; font-size: 14px; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a:hover { color: var(--ink); }
main { width: var(--page); margin: 0 auto; padding: 3.5rem 0 4rem; }
.kicker {
  margin: 0 0 12px;
  color: #e2a54a;
  font: 700 11px/1.4 var(--mono);
  letter-spacing: 0.14em;
}
.hero h1 {
  margin: 0 0 18px;
  font: 700 clamp(36px, 6vw, 58px)/1.15 var(--serif);
  letter-spacing: -0.03em;
}
.lede { max-width: 40rem; color: var(--muted); font-size: 17px; line-height: 1.8; }
.shelf {
  margin-top: 3.2rem;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}
.book {
  min-height: 220px;
  padding: 18px 16px 20px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: 1px solid var(--line);
  background: #221f1b;
}
.book:hover { transform: translateY(-3px); }
.spine {
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.12em;
  opacity: 0.85;
}
.book b { font: 700 20px/1.3 var(--serif); }
.book em { margin-top: auto; font-style: normal; color: var(--muted); font-size: 13px; line-height: 1.55; }
.b-agent { border-top: 6px solid #e2a54a; }
.b-dl { border-top: 6px solid #7ea4d9; }
.b-kid { border-top: 6px solid #d08a62; }
.b-arch { border-top: 6px solid #6f8fbf; }
.b-infra { border-top: 6px solid #6fbf8a; }
.b-mig { border-top: 6px solid #c4a35a; }
.b-rag { border-top: 6px solid #b06060; }
.b-pm { border-top: 6px solid #c45c3e; }
.b-rel { border-top: 6px solid #7a8f7a; }
.b-work { border-top: 6px solid #e0c35a; }
.note { margin-top: 4rem; max-width: 38rem; }
.note h2 { font: 700 22px/1.3 var(--serif); }
.note ol { padding-left: 1.2rem; color: var(--muted); }
.note a { color: #e2a54a; }
.foot {
  width: var(--page);
  margin: 0 auto;
  padding: 24px 0 48px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
.foot a { color: #e2a54a; text-decoration: none; font: 700 11px/1 var(--mono); letter-spacing: 0.08em; }
@media (max-width: 960px) {
  .shelf { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .shelf { grid-template-columns: 1fr; }
  .top nav a:first-child { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .book:hover { transform: none; }
}