:root {
  color-scheme: light dark;
  --bg: #f4f2ed;
  --paper: #fffdf8;
  --ink: #202326;
  --muted: #656b70;
  --line: #d7d2c8;
  --accent: #753332;
  --accent2: #315e64;
  --soft: #ebe7de;
  --shadow: 0 12px 35px rgba(25, 29, 31, .08);
  --max: 1120px;
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151817;
    --paper: #202422;
    --ink: #eeece7;
    --muted: #aeb4b0;
    --line: #414743;
    --accent: #e3a29a;
    --accent2: #91c5c7;
    --soft: #292e2b;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.55;
}
a { color: inherit; }
header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
}
.header-inner, main, footer {
  width: min(var(--max), calc(100% - 2rem));
  margin: auto;
}
.header-inner {
  padding: 3.5rem 0 2.5rem;
}
.kicker {
  font: 700 .75rem/1.2 var(--sans);
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--accent);
}
h1 {
  margin: .35rem 0 .7rem;
  max-width: 850px;
  font-size: clamp(2.5rem, 7vw, 5.8rem);
  line-height: .94;
  letter-spacing: -.05em;
}
.intro {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 1.15rem;
}
.controls {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: .75rem 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
}
.search {
  width: 100%;
  padding: .78rem .9rem;
  border: 1px solid var(--line);
  border-radius: .5rem;
  background: var(--paper);
  color: var(--ink);
  font: 500 1rem/1.2 var(--sans);
}
main { padding-bottom: 4rem; }
.summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1rem 0 .45rem;
  color: var(--muted);
  font-family: var(--sans);
}
.summary strong { color: var(--ink); }
.library {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.book {
  display: flex;
  flex-direction: column;
  min-height: 285px;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: .7rem;
  background: var(--paper);
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: transform .12s ease, border-color .12s ease;
}
.book:hover, .book:focus-visible {
  transform: translateY(-2px);
  border-color: var(--accent2);
  outline: none;
}
.book .status {
  align-self: flex-start;
  margin-bottom: 1rem;
  padding: .32rem .48rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent2);
  font: 700 .68rem/1 var(--sans);
  letter-spacing: .07em;
  text-transform: uppercase;
}
.book h2 {
  margin: 0 0 .2rem;
  font-size: 2rem;
  line-height: 1.05;
  letter-spacing: -.025em;
}
.book .subtitle {
  margin: 0 0 .65rem;
  color: var(--muted);
  font-style: italic;
}
.book .author, .book .period {
  font: 650 .82rem/1.35 var(--sans);
}
.book .period { color: var(--muted); }
.book .description {
  flex: 1;
  margin: 1rem 0;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: .38rem;
}
.tag {
  padding: .35rem .48rem;
  border-radius: .35rem;
  background: var(--soft);
  color: var(--muted);
  font: 700 .69rem/1 var(--sans);
}
.empty {
  display: none;
  padding: 2rem;
  border: 1px dashed var(--line);
  border-radius: .65rem;
  color: var(--muted);
  text-align: center;
  font-family: var(--sans);
}
footer {
  padding: 1.5rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 500 .78rem/1.5 var(--sans);
}
@media (max-width: 720px) {
  .header-inner { padding-top: 2.4rem; }
  .library { grid-template-columns: 1fr; }
  .book { min-height: 250px; }
}
@media print {
  .controls { display: none; }
  body { background: #fff; color: #000; }
  .book { box-shadow: none; break-inside: avoid; }
}