:root {
  --surface-1:      #fcfcfb;
  --page-plane:     #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --gridline:       #e1e0d9;
  --baseline:       #c3c2b7;
  --border:         rgba(11,11,11,0.10);

  --series-1: #2a78d6;
  --series-2: #1baf7a;
  --series-3: #eda100;
  --series-4: #008300;
  --series-5: #4a3aa7;
  --series-6: #e34948;
  --series-7: #e87ba4;
  --series-8: #eb6834;
  --series-other: #898781;

  --good: #0ca30c;
  --critical: #d03b3b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface-1:      #1a1a19;
    --page-plane:     #0d0d0d;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --gridline:       #2c2c2a;
    --baseline:       #383835;
    --border:         rgba(255,255,255,0.10);

    --series-1: #3987e5;
    --series-2: #199e70;
    --series-3: #c98500;
    --series-4: #008300;
    --series-5: #9085e9;
    --series-6: #e66767;
    --series-7: #d55181;
    --series-8: #d95926;

    --good: #0ca30c;
    --critical: #e66767;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--page-plane);
  color: var(--text-primary);
}

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

input, select, button {
  font-family: inherit;
  font-size: 14px;
}

label { display: block; margin: 10px 0 4px; font-size: 13px; color: var(--text-secondary); }

input[type=text], input[type=password], input[type=number] {
  width: 100%;
  max-width: 360px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-1);
  color: var(--text-primary);
}

button {
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--series-1);
  color: white;
  cursor: pointer;
  margin-top: 12px;
}

button.ghost-btn {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
  margin-top: 0;
}

.error { color: var(--critical); margin-top: 8px; min-height: 1em; }

.view { min-height: 100vh; }

.login-card {
  max-width: 320px;
  margin: 15vh auto;
  padding: 24px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.login-card h1 { margin: 0 0 4px; }

.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 10px 20px;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; }
.tabs { display: flex; gap: 4px; flex: 1; }
.tab-btn {
  background: transparent; color: var(--text-secondary); border: none;
  padding: 8px 14px; border-radius: 6px; margin: 0; cursor: pointer;
}
.tab-btn.active { background: var(--page-plane); color: var(--text-primary); font-weight: 600; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.badge {
  background: var(--critical); color: white; border-radius: 999px;
  padding: 1px 7px; font-size: 11px; margin-left: 4px;
}

main { padding: 20px; max-width: 960px; margin: 0 auto; }
.tab-panel { }

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
}

.toolbar { display: flex; gap: 10px; margin-bottom: 16px; align-items: center; }
.toolbar select {
  padding: 6px 10px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--surface-1); color: var(--text-primary);
}

.month-group {
  margin-bottom: 18px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.month-header {
  padding: 10px 16px;
  font-weight: 600;
  background: var(--page-plane);
  display: flex;
  justify-content: space-between;
}
.invoice-row {
  display: grid;
  grid-template-columns: 22px 1fr 110px 110px 90px;
  gap: 10px;
  align-items: center;
  padding: 10px 16px;
  border-top: 1px solid var(--gridline);
  cursor: pointer;
}
.invoice-row .swatch { width: 10px; height: 10px; border-radius: 2px; }
.invoice-row .amount { font-variant-numeric: tabular-nums; text-align: right; }
.invoice-row .due-date { color: var(--text-secondary); font-size: 13px; }
.invoice-detail {
  padding: 12px 16px 16px 48px;
  border-top: 1px solid var(--gridline);
  background: var(--page-plane);
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.invoice-detail img { width: 140px; height: 140px; background: white; border-radius: 6px; }
.invoice-detail dl { margin: 0; font-size: 13px; }
.invoice-detail dt { color: var(--text-secondary); }
.invoice-detail dd { margin: 0 0 8px 0; }

.pending-row {
  display: grid;
  grid-template-columns: 1fr 140px auto auto;
  gap: 10px;
  align-items: center;
  padding: 12px 16px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
}
.pending-row select { padding: 6px; border-radius: 6px; border: 1px solid var(--border); background: var(--page-plane); color: var(--text-primary); }

.chart-legend { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.legend-chip {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 10px; border-radius: 999px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 13px;
  background: var(--surface-1);
  user-select: none;
}
.legend-chip .swatch { width: 10px; height: 10px; border-radius: 2px; }
.legend-chip.off { opacity: 0.35; }

.chart-wrap { background: var(--surface-1); border: 1px solid var(--border); border-radius: 10px; padding: 10px; }
.chart-tooltip {
  position: fixed;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 12px;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  z-index: 100;
}

.inline-form { display: flex; gap: 8px; align-items: flex-end; margin-top: 12px; }
.inline-form input { max-width: 200px; }
.inline-form button { margin-top: 0; }

.category-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 0; border-bottom: 1px solid var(--gridline);
}
.category-row button { margin-top: 0; padding: 4px 10px; }