:root {
  --ink: #1c2321;
  --paper: #faf8f4;
  --card: #ffffff;
  --line: #e4ddd0;
  --olive: #4b5d3a;
  --olive-dark: #3a4a2c;
  --rust: #b5502f;
  --rust-light: #f4e2d8;
  --muted: #766f60;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 16px 96px;
}

header.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  background: var(--olive);
  color: #fff;
}

header.top .store-name {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

header.top a {
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
  opacity: 0.85;
}

h1 { font-size: 1.5rem; margin: 20px 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 24px 0 10px; }

a { color: var(--olive-dark); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}

.summary-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.summary-row .card {
  margin-bottom: 0;
  text-align: left;
}

.summary-row .figure {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--olive-dark);
}

.summary-row .label {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 18px;
  border-radius: var(--radius);
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  min-height: 48px;
}

.btn-primary { background: var(--olive); color: #fff; }
.btn-primary:hover { background: var(--olive-dark); }

.btn-rust { background: var(--rust); color: #fff; }
.btn-rust:hover { background: #9c4326; }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--line);
  color: var(--ink);
}

.btn-block { width: 100%; }

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 14px 0;
}

.field { margin-bottom: 14px; }

.field label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
}

input[type="text"],
input[type="tel"],
input[type="number"],
input[type="password"],
textarea {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-family: inherit;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--olive);
}

textarea { resize: vertical; min-height: 70px; }

.customer-list { list-style: none; margin: 0; padding: 0; }

.customer-list li {
  display: block;
}

.customer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
}

.customer-list li:last-child .customer-row { border-bottom: none; }

.customer-row .name { font-weight: 600; }
.customer-row .phone { font-size: 0.85rem; color: var(--muted); }

.balance { font-weight: 700; font-variant-numeric: tabular-nums; }
.balance.owing { color: var(--rust); }
.balance.clear { color: var(--muted); font-weight: 500; }

.search-box { margin-bottom: 6px; }

.empty-state {
  text-align: center;
  padding: 40px 16px;
  color: var(--muted);
}

.tx-list { list-style: none; margin: 0; padding: 0; }

.tx-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--line);
}

.tx-list li:last-child .tx-item { border-bottom: none; }

.tx-desc { font-size: 0.92rem; }
.tx-date { font-size: 0.78rem; color: var(--muted); margin-top: 2px; }
.tx-amount { font-weight: 700; white-space: nowrap; text-align: right; }
.tx-amount.charge { color: var(--rust); }
.tx-amount.payment { color: var(--olive-dark); }
.tx-running { font-size: 0.75rem; color: var(--muted); margin-top: 2px; text-align: right; }

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--rust-light);
  color: var(--rust);
}

.alert {
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 0.92rem;
}

.alert-error { background: #fbe4dd; color: #8a341a; }
.alert-success { background: #e5ecdd; color: var(--olive-dark); }

.top-balance-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}
.top-balance-item:last-child { border-bottom: none; }

.print-only { display: none; }

@media print {
  header.top, .no-print { display: none !important; }
  .print-only { display: block; }
  body { background: #fff; }
  .wrap { padding: 0; max-width: 100%; }
}

.back-link {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--muted);
  text-decoration: none;
}

.login-wrap {
  max-width: 360px;
  margin: 60px auto;
  padding: 0 16px;
}

.center-note {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 16px;
}