:root {
  --bg: #f6f7f9; --surface: #fff; --text: #1d2330; --muted: #667085; --border: #dfe3ea;
  --accent: #1f5fae; --accent-text: #fff; --ok: #1e7a46; --ok-bg: #e5f4ea; --bad: #b42318; --bad-bg: #fdecea;
  --warn: #8a5a00; --warn-bg: #fff4dc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c; --surface: #1d2128; --text: #e7eaf0; --muted: #98a2b3; --border: #2e343e;
    --accent: #5b9bea; --accent-text: #0d1117; --ok: #6fcf97; --ok-bg: #1c3326; --bad: #f28b82; --bad-bg: #3b1f1d;
    --warn: #f2c66d; --warn-bg: #3a2f17;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); }
h1 { font-size: 1.6rem; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 .75rem; }
main { max-width: 1200px; margin: 0 auto; padding: 1.5rem 16px 4rem; }
.topbar { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; padding: .75rem 16px; background: var(--surface); border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; text-decoration: none; color: var(--text); }
.topbar nav { display: flex; flex-wrap: wrap; gap: 1rem; flex: 1; }
.topbar nav a { text-decoration: none; }
.who { display: flex; gap: 1rem; align-items: center; }
.who form, .actions form { display: inline; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1.5rem; }
.narrow { max-width: 460px; margin: 2rem auto; }
.muted { color: var(--muted); }
.field { margin-bottom: 1rem; display: flex; flex-direction: column; gap: .25rem; }
.field.checkbox label { display: flex; gap: .5rem; align-items: center; }
input:not([type=checkbox]), select, textarea { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: .5rem .6rem; width: 100%; }
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.filters select { width: auto; }
button, .button { font: inherit; border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 6px; padding: .5rem 1rem; cursor: pointer; text-decoration: none; display: inline-block; }
.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.link { background: none; border: none; padding: 0; color: var(--accent); text-decoration: underline; }
small.help { color: var(--muted); }
small.help ul { margin: .25rem 0; padding-left: 1.2rem; }
small.error, .has-error label { color: var(--bad); }
.flash { padding: .75rem 1rem; border-radius: 6px; margin-bottom: 1rem; background: var(--ok-bg); color: var(--ok); }
.flash.error { background: var(--bad-bg); color: var(--bad); }
.flash.warning { background: var(--warn-bg); color: var(--warn); }
.table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; }
@media (max-width: 760px) { .table { display: block; overflow-x: auto; } }
.table th, .table td { text-align: left; padding: .55rem .75rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.table th { font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
.nowrap { white-space: nowrap; }
.actions { display: flex; gap: .75rem; white-space: nowrap; }
.tag { font-size: .8rem; padding: .1rem .5rem; border-radius: 999px; background: var(--warn-bg); color: var(--warn); }
.tag.created { background: var(--ok-bg); color: var(--ok); }
.tag.deleted { background: var(--bad-bg); color: var(--bad); }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.form-card { max-width: 640px; margin: 1rem auto; }
.field ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: .25rem; }
.field ul label { display: flex; gap: .5rem; align-items: center; }
.num { text-align: right !important; white-space: nowrap; }
.owed { color: var(--bad); font-weight: 600; }
tr.waived td { color: var(--muted); text-decoration: line-through; }
tr.waived td.actions { text-decoration: none; }
.danger { background: var(--bad); border-color: var(--bad); color: #fff; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: .75rem; margin: 1rem 0 1.5rem; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1rem; display: flex; flex-direction: column; gap: .2rem; }
.stat span { color: var(--muted); font-size: .85rem; }
.stat strong { font-size: 1.4rem; }
.stat small { color: var(--muted); }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: .4rem 1.5rem; margin: 0 0 1rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
.inline-form { display: flex; flex-wrap: wrap; gap: .75rem; align-items: flex-end; }
.inline-form label { display: flex; flex-direction: column; gap: .2rem; font-size: .85rem; color: var(--muted); flex: 1 1 140px; }
h2.flush { margin-top: 0; }
.two-col { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 0 1.5rem; }
@media (max-width: 760px) {
  .topbar nav { order: 3; flex-basis: 100%; gap: .5rem 1rem; }
  .who { margin-left: auto; }
}
label.inline { display: flex; align-items: center; gap: .4rem; color: var(--muted); font-size: .9rem; }
label.inline input { width: auto; }
.filters input[type=date] { width: auto; }
.filters a { align-self: center; }
tr.total td { font-weight: 600; }
.right { float: right; }
.danger-link { color: var(--bad); }
@media print {
  .topbar, .noprint, .flash { display: none !important; }
  body { background: #fff; color: #000; }
  .table { border: none; }
}