:root {
  --green: #1f6f4a;
  --green-light: #e7f2ec;
  --text: #1d2329;
  --grey: #5f6b76;
  --line: #dde2e6;
  --bg: #f6f7f8;
  --white: #fff;
  --red: #b3261e;
  --red-light: #fbeaea;
  --yellow-light: #fff6e0;
  --radius: 8px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--green); }
h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }

header.topbar {
  background: var(--green);
  color: #fff;
}
.topbar-inner {
  max-width: 1200px; margin: 0 auto; padding: .6rem 16px;
  display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap;
}
.brand { font-weight: 700; color: #fff; text-decoration: none; white-space: nowrap; }
nav.main-nav { display: flex; gap: .25rem; flex-wrap: wrap; flex: 1; }
nav.main-nav a {
  color: #fff; text-decoration: none; padding: .35rem .7rem; border-radius: 6px; opacity: .9;
}
nav.main-nav a:hover, nav.main-nav a.active { background: rgba(255,255,255,.18); opacity: 1; }
.user { font-size: .9rem; display: flex; gap: .75rem; align-items: center; }
.user form { margin: 0; }
.user button { background: none; border: 1px solid rgba(255,255,255,.5); color: #fff; padding: .2rem .6rem; border-radius: 6px; cursor: pointer; }

main { max-width: 1200px; margin: 0 auto; padding: 1.5rem 16px 3rem; }

.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.25rem; margin-bottom: 1.25rem;
}
.grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.stats { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); margin-bottom: 1.25rem; }
.stat { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.25rem; }
.stat .value { font-size: 1.75rem; font-weight: 700; }
.stat .label { color: var(--grey); font-size: .9rem; }
.stat.warning .value { color: var(--red); }

.page-header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.page-header h1 { margin: 0; }
.actions { display: flex; gap: .5rem; flex-wrap: wrap; }

.button, button.button {
  display: inline-block; background: var(--green); color: #fff; border: 0; border-radius: 6px;
  padding: .5rem .9rem; font: inherit; text-decoration: none; cursor: pointer;
}
.button.secondary { background: var(--white); color: var(--green); border: 1px solid var(--green); }
.button.small { padding: .25rem .6rem; font-size: .85rem; }
.button.danger { background: var(--white); color: var(--red); border: 1px solid var(--red); }

.filter { display: flex; gap: .75rem; flex-wrap: wrap; align-items: end; margin-bottom: 1rem; }
.filter label { display: flex; flex-direction: column; font-size: .85rem; color: var(--grey); gap: .2rem; }
input, select, textarea {
  font: inherit; padding: .45rem .6rem; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--text);
}

.table-wrap { overflow-x: auto; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .55rem .75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: .85rem; color: var(--grey); font-weight: 600; background: #fafbfb; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
tbody tr:hover { background: #fafcfb; }

.badge {
  display: inline-block; padding: .05rem .5rem; border-radius: 999px; font-size: .8rem; background: var(--green-light); color: var(--green);
  white-space: nowrap; margin: 0 .15rem .15rem 0;
}
.badge.unpaid { background: var(--yellow-light); color: #8a5a00; }
.badge.overdue { background: var(--red-light); color: var(--red); }
.badge.grey { background: #eef0f2; color: var(--grey); }

.messages { list-style: none; padding: 0; margin: 0 0 1rem; }
.messages li { padding: .6rem 1rem; border-radius: 6px; background: var(--green-light); margin-bottom: .5rem; }
.messages li.error { background: var(--red-light); }

dl.details { display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1.25rem; margin: 0; }
dl.details dt { color: var(--grey); }
dl.details dd { margin: 0; }

.form-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.form-grid .field { display: flex; flex-direction: column; gap: .25rem; }
.form-grid .field.wide { grid-column: 1 / -1; }
.form-grid label { font-weight: 600; font-size: .9rem; }
.form-grid .help { font-size: .8rem; color: var(--grey); }
.form-grid .error { color: var(--red); font-size: .85rem; }
.form-grid ul { list-style: none; padding: 0; margin: 0; display: flex; gap: .5rem 1.25rem; flex-wrap: wrap; }
.form-grid ul label { font-weight: 400; }

.empty { color: var(--grey); }
.bar { height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--green); }
.small { font-size: .85rem; color: var(--grey); }

.login { max-width: 380px; margin: 4rem auto; }
.login form { display: flex; flex-direction: column; gap: .75rem; }
.demo-hint { background: var(--yellow-light); border-radius: 6px; padding: .75rem 1rem; font-size: .9rem; }

.bulk { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; padding: .75rem; border-top: 1px solid var(--line); background: #fafbfb; }

@media (max-width: 640px) {
  .topbar-inner { gap: .5rem; }
  nav.main-nav { order: 3; width: 100%; flex: none; }
  .user { width: 100%; justify-content: space-between; }
  .hide-mobile { display: none; }
}