:root {
  color-scheme: light;
  font-family: system-ui, sans-serif;
  color: #24313a;
  background: #f4f7f6;
}

* { box-sizing: border-box; }

body { margin: 0; }

main { width: min(100% - 2rem, 48rem); margin: 0 auto; padding: 3rem 0; }

.page-header { margin-bottom: 2rem; }
.eyebrow { margin: 0 0 .5rem; color: #176b5b; font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
h1, h2 { color: #15232b; }
h1 { margin: 0; font-size: clamp(2rem, 6vw, 3.25rem); }
h2 { margin-top: 0; }
.page-header p:last-child { margin-bottom: 0; color: #52616a; }
.panel { margin-top: 1.25rem; padding: 1.5rem; background: #fff; border: 1px solid #d7e1de; border-radius: .75rem; box-shadow: 0 4px 18px rgb(28 55 48 / 6%); }
.form-fields { display: grid; gap: 1rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field { display: grid; gap: .4rem; }
label { font-weight: 650; }
input { width: 100%; padding: .7rem .8rem; border: 1px solid #9caaa7; border-radius: .4rem; font: inherit; }
button { margin-top: 1.25rem; padding: .7rem 1rem; border: 0; border-radius: .4rem; color: #fff; background: #176b5b; font: inherit; font-weight: 700; cursor: pointer; }
button:hover { background: #0f5145; }
button:focus-visible, input:focus-visible { outline: 3px solid #f2b84b; outline-offset: 2px; }
.error { margin: 0 0 1rem; padding: .75rem 1rem; border-left: 4px solid #b42318; color: #7a1b14; background: #fff0ee; }
.book-list { display: grid; gap: .75rem; margin: 0; padding-left: 1.5rem; }
.book-item { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .85rem .5rem .85rem .25rem; border-bottom: 1px solid #e4ecea; }
.book-item strong, .book-item span { display: block; }
.book-item span { margin-top: .2rem; color: #52616a; }
.book-item form { flex: 0 0 auto; }
.remove-button { margin: 0; color: #8a241c; background: transparent; border: 1px solid #dba19b; }
.remove-button:hover { color: #fff; background: #8a241c; }
.empty-state { margin: 0; color: #52616a; }

@media (max-width: 36rem) {
  main { padding: 2rem 0; }
  .panel { padding: 1.1rem; }
  .form-fields { grid-template-columns: 1fr; }
  .book-item { align-items: flex-start; flex-direction: column; }
}