/* Layout: a single library shelf-list. Index letters sit in a left gutter, titles in the middle, buy buttons on the right. */
:root {
  --paper: #f6f7fb;
  --card: #ffffff;
  --ink: #171c33;
  --soft: #58607c;
  --rule: #dcdfeb;
  --accent: #a3215e;
  --accent-ink: #ffffff;
  --head: #171c33;
  --head-ink: #f3f1f7;
  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --body: "Figtree", "Segoe UI", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #10142a; --card: #181d38; --ink: #eceaf4; --soft: #a3a9c4; --rule: #2b3156;
    --accent: #f08bb8; --accent-ink: #1a0a12; --head: #0a0d1f; --head-ink: #f3f1f7;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.55 var(--body); }
.wrap { max-width: 60rem; margin-inline: auto; padding-inline: 1.25rem; }

.top { background: var(--head); color: var(--head-ink); padding-block: 3rem 3.25rem; }
.mark { font: italic 400 1.5rem/1 var(--display); margin: 0 0 2rem; letter-spacing: .01em; }
.mark::after { content: ""; display: block; width: 2.5rem; height: 3px; background: #f08bb8; margin-top: .75rem; }
h1 { font: 600 clamp(1.9rem, 5vw, 3.1rem)/1.1 var(--display); margin: 0 0 1.25rem; max-width: 18ch; text-wrap: balance; }
.lede { margin: 0; max-width: 62ch; color: #c5c8dc; }

main { padding-block: 2rem 4rem; }
.storebar { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem .9rem; padding: .9rem 1rem; background: var(--card); border: 1px solid var(--rule); border-radius: 6px; }
.storebar label { font-weight: 600; }
.storebar select, .storebar button { font: inherit; color: var(--ink); background: var(--paper); border: 1px solid var(--rule); border-radius: 4px; padding: .4rem .6rem; max-width: 100%; }
.storebar select:focus-visible, .btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.count { font: 500 .8rem/1 var(--body); letter-spacing: .12em; text-transform: uppercase; color: var(--soft); margin: 2.25rem 0 .5rem; }

.shelf { list-style: none; margin: 0; padding: 0; }
.book { display: grid; grid-template-columns: 3rem minmax(0, 1fr) auto; gap: .5rem 1.25rem; align-items: center; padding-block: 1.1rem; border-top: 1px solid var(--rule); }
.book.first { border-top: 2px solid var(--ink); }
.letter { font: 600 2rem/1 var(--display); color: var(--accent); align-self: start; padding-top: .1rem; }
h3 { font: 600 1.3rem/1.25 var(--display); margin: 0; text-wrap: balance; }
.by { margin: .2rem 0 0; }
.meta { margin: .15rem 0 0; font-size: .875rem; color: var(--soft); }
.buy { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: flex-end; }
.btn { display: inline-block; padding: .55rem 1rem; border-radius: 4px; background: var(--accent); color: var(--accent-ink); font-weight: 600; font-size: .95rem; text-decoration: none; white-space: nowrap; }
.btn:hover { filter: brightness(1.12); }
.btn::after { content: " \2197"; font-weight: 400; }

.foot { border-top: 1px solid var(--rule); padding-block: 2rem 3rem; color: var(--soft); font-size: .9rem; }
.foot p { margin: 0 0 .5rem; max-width: 65ch; }

@media (max-width: 40rem) {
  .book { grid-template-columns: 2rem minmax(0, 1fr); }
  .letter { font-size: 1.5rem; }
  .buy { grid-column: 2; justify-content: flex-start; }
}