:root {
  --bg: #f6f1e7;
  --card: #fffdf8;
  --ink: #2b2420;
  --muted: #7a6e63;
  --line: #e4dac8;
  --accent: #8a5a2b;
  --accent-ink: #fff;
  --gold: #c9a227;
  --ok: #2f7d4f;
  --warn: #a46a00;
  --err: #b23b3b;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.06), 0 4px 14px rgba(60,40,20,.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1815; --card: #24201c; --ink: #f1e9dd; --muted: #a99b8c;
    --line: #3a332c; --accent: #d79a5a; --accent-ink: #1b1815;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
[hidden] { display: none !important; }
h2, h3 { margin: 0 0 .6rem; font-family: Georgia, "Times New Roman", serif; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.error { color: var(--err); }
.warning { color: var(--warn); background: color-mix(in srgb, var(--gold) 15%, transparent); padding: .5rem .75rem; border-radius: 8px; margin: .5rem 0 0; }
code { background: var(--line); padding: 0 .3rem; border-radius: 4px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1rem; }
.brand { font-family: Georgia, serif; font-weight: 700; font-size: 1.15rem; white-space: nowrap; }
.brand.big { font-size: 1.5rem; margin-bottom: .25rem; }

/* Buttons & inputs */
.btn { border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 8px; padding: .55rem 1rem; font: inherit; cursor: pointer; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn.ghost { background: transparent; }
.btn.small { padding: .3rem .65rem; font-size: .85rem; }
.btn.danger { color: var(--err); }
.btn.wide { width: 100%; }
input, select, textarea {
  width: 100%; font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: .5rem .6rem;
}
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 50%, transparent); border-color: var(--accent); }
label { display: flex; flex-direction: column; gap: .25rem; font-size: .85rem; color: var(--muted); }
label.check { flex-direction: row; align-items: center; gap: .5rem; font-size: .95rem; color: var(--ink); }
label.check input { width: auto; }

/* Login */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 380px; display: flex; flex-direction: column; gap: .8rem; border-top: 3px solid var(--gold); }

/* Topbar */
.topbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: .7rem 16px; background: var(--card); border-bottom: 2px solid var(--gold); }
.tabs { display: flex; gap: .25rem; flex: 1; flex-wrap: wrap; }
.tab { border: 0; background: transparent; color: var(--muted); font: inherit; padding: .45rem .8rem; border-radius: 8px; cursor: pointer; }
.tab.active { background: var(--bg); color: var(--ink); font-weight: 600; }
.user { display: flex; align-items: center; gap: .5rem; }

.tab-panel { max-width: 1200px; margin: 0 auto; padding: 16px; display: flex; flex-direction: column; gap: 16px; }

/* Scannen */
.scan-label { font-size: 1rem; color: var(--ink); font-weight: 600; }
.scan-row { display: flex; gap: .5rem; margin-top: .4rem; }
.isbn-input { font-size: 1.4rem; letter-spacing: .05em; padding: .6rem .8rem; }

.form-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.form-grid { display: grid; grid-template-columns: 200px 1fr; gap: 1.25rem; }
.cover-box { aspect-ratio: 2/3; border: 1px dashed var(--line); border-radius: 8px; display: grid; place-items: center; overflow: hidden; background: var(--bg); color: var(--muted); }
.cover-box img { width: 100%; height: 100%; object-fit: cover; }
fieldset { border: 1px solid var(--line); border-radius: 10px; padding: .75rem; margin: 0 0 .9rem; }
legend { padding: 0 .4rem; font-weight: 600; }
.row { display: flex; gap: .6rem; flex-wrap: wrap; margin-bottom: .55rem; }
.row > label { flex: 1 1 160px; }
.row > label.grow { flex: 3 1 240px; }
.row > label.xs { flex: 0 1 100px; }
.with-btn { display: flex; gap: .3rem; }
.actions { display: flex; gap: .5rem; flex-wrap: wrap; }

/* Verzameling */
.toolbar { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.toolbar > .grow { flex: 2 1 240px; }
.toolbar select { flex: 1 1 150px; width: auto; }
.export { display: flex; gap: .3rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px; }
.book { display: grid; grid-template-columns: 70px 1fr; gap: .8rem; }
.book .thumb { width: 70px; aspect-ratio: 2/3; border-radius: 6px; background: var(--bg); border: 1px solid var(--line); object-fit: cover; display: grid; place-items: center; font-size: 1.6rem; }
.book h3 { font-size: 1rem; margin: 0; }
.book .meta { margin: .15rem 0 .4rem; }
.badges { display: flex; flex-wrap: wrap; gap: .3rem; margin-bottom: .4rem; }
.badge { font-size: .75rem; padding: .1rem .5rem; border-radius: 99px; border: 1px solid var(--line); background: var(--bg); }
.badge.s-uitstekend { border-color: var(--ok); color: var(--ok); }
.badge.s-goed { border-color: var(--warn); color: var(--warn); }
.badge.s-slecht { border-color: var(--err); color: var(--err); }
.badge.gold { border-color: var(--gold); color: var(--gold); }
.prices { font-size: .9rem; }
.prices strong { font-size: 1rem; }
.book .btns { display: flex; gap: .3rem; margin-top: .5rem; }

/* Statistieken */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; }
.kpi { border-top: 3px solid var(--gold); }
.kpi .val { font-size: 1.6rem; font-weight: 700; font-family: Georgia, serif; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 12px; }
.bars { display: flex; flex-direction: column; gap: .45rem; }
.bar-row { display: grid; grid-template-columns: minmax(90px, 40%) 1fr auto; gap: .5rem; align-items: center; font-size: .85rem; }
.bar-row .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { background: var(--bg); border-radius: 99px; height: 10px; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--gold)); border-radius: 99px; }
.bar-row .num { white-space: nowrap; color: var(--muted); }

/* Toast */
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--bg);
  padding: .6rem 1rem; border-radius: 8px; box-shadow: var(--shadow); z-index: 50; max-width: calc(100% - 32px); }
.toast.err { background: var(--err); color: #fff; }

@media (max-width: 720px) {
  .form-grid { grid-template-columns: 1fr; }
  .cover-col { max-width: 160px; }
  .user .small { display: none; }
  .grid { grid-template-columns: 1fr; }
}