:root {
  --bg: #faf7f2;
  --card: #ffffff;
  --ink: #2b2724;
  --muted: #8a8278;
  --line: #ece6dd;
  --accent: #1f7a5c;
  --wa: #25d366;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.05);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; }
body {
  font-family: "Heebo", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  background: var(--bg); color: var(--ink); line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 14px 20px; border-bottom: 1px solid var(--line);
  background: var(--card); position: sticky; top: 0; z-index: 5;
}
.brand-group { display: flex; align-items: center; gap: 12px; }
.brand { font-weight: 800; font-size: 1.2rem; }
.nav { display: flex; gap: 6px; flex-wrap: wrap; }
.link {
  border: none; background: none; font: inherit; color: var(--ink);
  cursor: pointer; padding: 7px 11px; border-radius: 9px; font-weight: 600;
}
.link:hover { background: var(--bg); }
.link.active { background: var(--accent); color: #fff; }
.link.ghost { color: var(--muted); font-weight: 500; }
.donate {
  text-decoration: none; background: #fff0d6; color: #9a6b00;
  border: 1px solid #f0dcae; font-weight: 700; padding: 7px 13px;
  border-radius: 9px; white-space: nowrap;
}
.donate:hover { filter: brightness(1.03); }

.view { max-width: 1040px; margin: 0 auto; padding: 22px 20px 40px; }
.view > h2 { margin: 4px 0 16px; }

.hero { text-align: center; padding: 40px 0 18px; }
.hero h1 { margin: 0; font-size: clamp(1.8rem, 6vw, 2.8rem); font-weight: 800; letter-spacing: -.02em; }
.tagline { margin: 10px auto 0; max-width: 40ch; color: var(--muted); font-size: 1.05rem; }

.stack { display: flex; flex-direction: column; gap: 12px; max-width: 440px; margin: 0 auto; }
input, .file {
  width: 100%; padding: 13px 16px; font: inherit; font-size: 1rem;
  border: 1px solid var(--line); border-radius: 12px; background: var(--card);
  box-shadow: var(--shadow); outline: none;
}
input:focus { border-color: var(--accent); }
.file { display: flex; align-items: center; gap: 8px; cursor: pointer; color: var(--muted); }
.file input { display: none; }

select { width: 100%; padding: 13px 16px; font: inherit; font-size: 1rem; border: 1px solid var(--line); border-radius: 12px; background: var(--card); box-shadow: var(--shadow); }
.pick-label { color: var(--muted); font-size: .9rem; margin: 4px 2px -4px; }
.genre-pick { display: flex; flex-wrap: wrap; gap: 6px; }
.gpick { font-size: .85rem; }

.btn {
  width: 100%; padding: 13px 16px; font: inherit; font-weight: 700; font-size: 1rem;
  border: none; border-radius: 12px; background: var(--accent); color: #fff; cursor: pointer;
}
.btn:hover { filter: brightness(1.07); }
.btn:disabled { opacity: .55; cursor: default; }
.hint { color: var(--muted); font-size: .88rem; text-align: center; margin: 2px 0 0; }

.intro { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; margin: 0 0 16px; color: var(--muted); font-size: .95rem; line-height: 1.5; }
.intro b { color: var(--ink); }
.controls { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 6px; }
.filters { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 12px 0 0; }
.filters select { padding: 8px 12px; font: inherit; border: 1px solid var(--line); border-radius: 9px; background: var(--card); }
.tagfilter { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { font: inherit; font-size: .85rem; border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 999px; padding: 6px 12px; cursor: pointer; }
.chip:hover { border-color: var(--accent); }
.chip.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.chip.near { font-weight: 600; }
.card .loc { color: var(--muted); font-size: .85rem; }
.card .tags { display: flex; gap: 5px; flex-wrap: wrap; margin-top: 4px; }
.tag-chip { font-size: .72rem; background: var(--bg); border: 1px solid var(--line); color: var(--muted); padding: 2px 8px; border-radius: 999px; }
#search, #add-search { flex: 1 1 280px; }
.count { color: var(--muted); font-size: .9rem; white-space: nowrap; }

.grid {
  margin-top: 18px; display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px;
}
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.card .cover { width: 100%; aspect-ratio: 3/4; background: #f0ebe3; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.card .cover img { width: 100%; height: 100%; object-fit: cover; }
.card .cover .ph { font-size: 2.6rem; opacity: .45; }
.card .body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 5px; flex: 1; }
.card .title { font-weight: 700; font-size: 1.05rem; line-height: 1.3; }
.card .author, .card .owner { color: var(--muted); font-size: .9rem; }
.card .spacer { flex: 1; }
.borrow {
  margin-top: 12px; display: inline-flex; justify-content: center; align-items: center; gap: 7px;
  text-decoration: none; background: var(--wa); color: #fff; font-weight: 700; font-size: .95rem;
  padding: 10px 14px; border-radius: 11px;
}
.borrow:hover { filter: brightness(1.05); }
.borrow.disabled { background: var(--line); color: var(--muted); pointer-events: none; }

.matches { display: flex; flex-direction: column; gap: 8px; max-width: 440px; margin: 12px auto 0; }
.match {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px;
}
.match small { color: var(--muted); }
.match button {
  border: none; background: var(--accent); color: #fff; font: inherit; font-weight: 600;
  padding: 7px 12px; border-radius: 9px; cursor: pointer; white-space: nowrap;
}
.divider { text-align: center; color: var(--muted); font-size: .9rem; margin: 22px auto 12px; max-width: 440px; }

.card-msg { max-width: 480px; margin: 60px auto; text-align: center; background: var(--card);
  border: 1px solid var(--line); border-radius: 16px; padding: 28px; box-shadow: var(--shadow); }
.mybooks { display: flex; flex-direction: column; gap: 8px; max-width: 620px; }
.myrow { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; }
.myrow .info .t { font-weight: 600; }
.myrow .info small { color: var(--muted); }
.myrow .acts { display: flex; gap: 6px; flex-shrink: 0; }
.mini { font: inherit; font-size: .85rem; border: 1px solid var(--line); background: var(--bg);
  border-radius: 8px; padding: 6px 10px; cursor: pointer; white-space: nowrap; }
.mini:hover { border-color: var(--accent); }
.mini.del:hover { border-color: var(--no); color: var(--no); }
.card.clickable { cursor: pointer; transition: transform .08s, box-shadow .12s; }
.card.clickable:hover { transform: translateY(-2px); box-shadow: 0 2px 4px rgba(0,0,0,.05), 0 14px 32px rgba(0,0,0,.09); }
.borrow.details { background: var(--accent); }
.adv-toggle { margin-top: 12px; }
.fl { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: .9rem; }
.fl select { width: auto; box-shadow: none; padding: 8px 12px; }

/* book page */
.chip.back { margin-bottom: 18px; }
.bookpage { display: flex; gap: 26px; flex-wrap: wrap; max-width: 780px; }
.bp-cover { width: 210px; aspect-ratio: 3/4; flex-shrink: 0; background: #f0ebe3; border-radius: 16px;
  display: flex; align-items: center; justify-content: center; overflow: hidden; box-shadow: var(--shadow); }
.bp-cover img { width: 100%; height: 100%; object-fit: cover; }
.bp-cover .ph { font-size: 3.2rem; opacity: .45; }
.bp-info { flex: 1; min-width: 270px; }
.bp-info h2 { margin: 0 0 6px; }
.bp-info h3 { margin: 22px 0 10px; font-size: 1.05rem; }
.lenders { display: flex; flex-direction: column; gap: 10px; }
.lender { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; }
.lender .borrow { margin-top: 0; }
.safety { text-align: right; margin-top: 20px; background: #fff7ed; border: 1px solid #f0dcae; border-radius: 10px; padding: 10px 14px; color: #8a6d3b; }
.empty { text-align: center; color: var(--muted); padding: 40px; }
footer { text-align: center; color: var(--muted); font-size: .85rem; padding: 30px 20px 50px; }