:root {
  --color-bg: #f5f7f6;
  --color-surface: #ffffff;
  --color-primary: #2f6e51;
  --color-primary-dark: #21503a;
  --color-text: #1f2a24;
  --color-muted: #5b6b62;
  --color-border: #dbe4de;
  --color-danger: #b3261e;
  --color-warning: #8a6d1a;
  --color-success: #1e6b3f;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Calibri, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

a { color: var(--color-primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.6rem 1.2rem;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 700; color: var(--color-primary-dark); }
.brand-logo { height: 32px; }
.mainnav { display: flex; gap: 1rem; flex-wrap: wrap; }
.mainnav a { color: var(--color-text); font-weight: 500; }
.usermenu { display: flex; gap: 1rem; align-items: center; font-size: 0.9rem; color: var(--color-muted); }

.page { max-width: 1200px; margin: 0 auto; padding: 1.5rem; }

.flash-stack { margin-bottom: 1rem; display: flex; flex-direction: column; gap: .5rem; }
.flash { padding: .6rem 1rem; border-radius: var(--radius); font-size: .95rem; }
.flash-success { background: #e4f4ea; color: var(--color-success); }
.flash-info { background: #e7f0fb; color: #1c4c8a; }
.flash-warning { background: #fbf3d8; color: var(--color-warning); }
.flash-danger { background: #fbe4e2; color: var(--color-danger); }

.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.2rem; margin-bottom: 1.2rem; }
h1, h2, h3 { color: var(--color-primary-dark); }

table { width: 100%; border-collapse: collapse; }
table th, table td { text-align: left; padding: .5rem .6rem; border-bottom: 1px solid var(--color-border); }
table th { color: var(--color-muted); font-weight: 600; font-size: .85rem; text-transform: uppercase; }

form .field { margin-bottom: .9rem; display: flex; flex-direction: column; gap: .25rem; min-width: 0; }
form label { font-weight: 600; font-size: .9rem; }
input, select, textarea {
  width: 100%; box-sizing: border-box;
  padding: .5rem .6rem; border: 1px solid var(--color-border); border-radius: 6px; font-size: 1rem;
  font-family: inherit;
}
input[type="checkbox"], input[type="radio"] { width: auto; padding: 0; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--color-primary); }

.btn {
  display: inline-block; padding: .55rem 1.1rem; border-radius: 6px; border: none;
  background: var(--color-primary); color: #fff; font-weight: 600; cursor: pointer; font-size: .95rem;
}
.btn:hover { background: var(--color-primary-dark); }
.btn-secondary { background: #eef2f0; color: var(--color-text); }
.btn-secondary:hover { background: #dde6e1; }
.btn-danger { background: var(--color-danger); }
.btn-sm { padding: .3rem .7rem; font-size: .85rem; }

.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.form-row .field { flex: 1; min-width: 180px; }
.form-row .checkbox-field { flex-direction: row; align-items: center; gap: .4rem; flex: 0; }
.hint { color: var(--color-muted); font-size: .85rem; margin: -.5rem 0 .75rem; }

.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; gap: 1rem; flex-wrap: wrap; }
.search-box { display: flex; gap: .5rem; }

.badge { display: inline-block; padding: .15rem .5rem; border-radius: 999px; font-size: .75rem; font-weight: 700; text-transform: uppercase; }
.badge-draft { background: #eee; color: #555; }
.badge-issued { background: #e7f0fb; color: #1c4c8a; }
.badge-paid { background: #e4f4ea; color: var(--color-success); }
.badge-void { background: #fbe4e2; color: var(--color-danger); }

.errors { color: var(--color-danger); font-size: .85rem; }

.receipt-item-row { display: grid; grid-template-columns: 3fr 1fr 1fr 1fr 1fr; gap: .5rem; align-items: end; margin-bottom: .5rem; }
.receipt-item-row .field { margin-bottom: 0; }
.totals-box { max-width: 320px; margin-left: auto; }
.totals-box table td { padding: .3rem .5rem; }
.totals-box .grand-total td { font-weight: 700; font-size: 1.1rem; border-top: 2px solid var(--color-text); }

@media print {
  .topbar, .no-print, .flash-stack { display: none !important; }
  .page { max-width: none; padding: 0; margin: 0; }
  .card { border: none; page-break-inside: avoid; break-inside: avoid; }
}