:root {
  color-scheme: light;
  --bg: #f6f5f1;
  --surface: #ffffff;
  --surface-alt: #fbfaf7;
  --border: #e5e2da;
  --border-strong: #d4d0c5;
  --text: #24271f;
  --text-muted: #767a6f;
  --text-faint: #9a9d92;
  --accent: #2f5233;
  --accent-soft: #eaf1e9;
  --accent-hover: #24401f;
  --warn-bg: #fdf3dd;
  --warn-border: #e5b95c;
  --warn-text: #7a5a12;
  --danger: #b3441e;
  --danger-soft: #fbe9e2;
  --shadow-sm: 0 1px 2px rgba(36, 39, 31, 0.05), 0 1px 1px rgba(36, 39, 31, 0.04);
  --shadow-md: 0 4px 16px rgba(36, 39, 31, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

h1 { font-size: 1.15rem; font-weight: 700; margin: 0; letter-spacing: -0.01em; }
h2 { font-size: 1rem; font-weight: 700; margin: 0 0 4px; color: var(--text); letter-spacing: -0.01em; }
h3 { margin: 0 0 6px; font-size: 0.78rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85em;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}

.screen { min-height: 100vh; }

.login-box {
  max-width: 380px;
  margin: 15vh auto;
  padding: 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  text-align: center;
}
.login-mark {
  width: 44px;
  height: 44px;
  margin: 0 auto 18px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box h1 { font-size: 1.3rem; margin-bottom: 6px; }
.login-box p { color: var(--text-muted); font-size: 0.9rem; margin: 0 0 20px; }

.btn {
  font: inherit;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}
.btn:hover { background: var(--surface-alt); border-color: var(--text-faint); }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-small { padding: 5px 11px; font-size: 0.8rem; }

.error {
  color: var(--danger);
  background: var(--danger-soft);
  border: 1px solid #eeccbd;
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.85rem;
}

.text-muted { color: var(--text-faint); }

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.tabs {
  display: flex;
  gap: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
}
.tab-btn {
  font: inherit;
  font-weight: 600;
  font-size: 0.85rem;
  padding: 6px 16px;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background-color 0.12s ease, color 0.12s ease;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.is-active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.topbar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-left: auto;
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 28px 64px;
}
.view {
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.view[hidden] { display: none; }

section { scroll-margin-top: 70px; }

.cards {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  min-width: 200px;
  box-shadow: var(--shadow-sm);
}
.card-flagged { border-color: var(--warn-border); background: var(--warn-bg); }
.card-total { font-size: 1.7rem; font-weight: 800; margin: 2px 0 6px; letter-spacing: -0.02em; }
.card-detail { font-size: 0.82rem; color: var(--text-muted); margin: 2px 0; }
.card-flag { font-size: 0.82rem; color: var(--warn-text); font-weight: 700; margin: 8px 0 0; }

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.data-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.data-table th, .data-table td {
  text-align: left;
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.87rem;
  white-space: nowrap;
}
.data-table th {
  background: var(--surface-alt);
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--surface-alt); }
.row-needs-review, .row-needs-review:hover { background: var(--warn-bg); }
.row-overdue { box-shadow: inset 3px 0 0 var(--danger); }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: flex-end;
  margin-bottom: 16px;
  font-size: 0.82rem;
}
.filters label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  color: var(--text-muted);
  font-weight: 600;
}
.filters select {
  font: inherit;
  padding: 7px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
}
.checkbox-label {
  flex-direction: row !important;
  align-items: center;
  gap: 7px !important;
}

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
}
.badge-high { background: var(--accent-soft); color: #256029; }
.badge-medium { background: var(--warn-bg); color: var(--warn-text); }
.badge-low { background: var(--danger-soft); color: #a3341a; }
.badge-review { background: var(--warn-border); color: #4a3300; }
.badge-overdue { background: var(--danger-soft); color: var(--danger); }

.status-select {
  font: inherit;
  font-weight: 600;
  padding: 6px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
}
.status-not_due { color: var(--text-muted); }
.status-outstanding { color: #a3341a; }
.status-paid { color: #256029; }

.empty-state { color: var(--text-faint); font-size: 0.87rem; padding: 18px 0; }

.section-hint { color: var(--text-muted); font-size: 0.85rem; margin: 0 0 18px; max-width: 620px; line-height: 1.5; }

.supplier-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 14px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  align-items: start;
}
.form-field { display: flex; flex-direction: column; gap: 5px; }
.form-field label { font-size: 0.8rem; font-weight: 700; color: var(--text); }
.form-field .optional { font-weight: 400; color: var(--text-faint); }
.form-field input {
  font: inherit;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
}
.form-field input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.field-hint { font-size: 0.76rem; color: var(--text-faint); margin: 0; line-height: 1.4; }
.supplier-form .btn { align-self: end; }

.poll-test-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  font-size: 0.85rem;
}
.poll-result-ok { color: var(--accent); font-weight: 600; }
.poll-result-error { color: var(--danger); font-weight: 600; }

.row-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.sender-address { margin-bottom: 4px; }
.sender-address:last-child { margin-bottom: 0; }
.edit-name-field { margin-bottom: 14px; max-width: 320px; }
.edit-name-field input { width: 100%; }
.row-editing td { padding: 8px 16px; }
.row-editing input {
  font: inherit;
  width: 100%;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
}
.supplier-test-result-row td {
  padding: 8px 16px;
  font-size: 0.82rem;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
}

.badge-category { background: #e6eef5; color: #1f4e79; }

.rules-panel-row td {
  padding: 18px 20px;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
}
.rules-panel { max-width: 640px; }
.rules-panel h3 { margin-bottom: 4px; }
.rules-panel .field-hint { margin-bottom: 14px; }
.rules-list-table {
  width: 100%;
  margin-bottom: 12px;
  border-collapse: collapse;
}
.rules-list-table td {
  padding: 6px 4px;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border);
}
.rules-list-table th {
  padding: 4px;
  font-size: 0.76rem;
  color: var(--text-faint);
  text-align: left;
}
.rules-list-table input {
  font: inherit;
  width: 100%;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
}
.rules-add-row, .rules-test-row, .rules-save-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.rules-add-row input, .rules-test-row input {
  font: inherit;
  padding: 7px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  flex: 1 1 180px;
  min-width: 140px;
}
.rules-test-output { font-size: 0.85rem; white-space: nowrap; }
.rules-status { font-size: 0.82rem; }

@media (max-width: 640px) {
  .topbar { flex-wrap: wrap; padding: 12px 16px; }
  .topbar-user { width: 100%; justify-content: space-between; margin-left: 0; }
  main { padding: 20px 16px 48px; }
}