:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-secondary: #52514e;
  --ink-muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-base: #2a78d6;
  --series-extra: #008300;
  --good: #006300;
  --bad: #d03b3b;
  --accent: #2a78d6;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-secondary: #c3c2b7;
    --ink-muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-base: #3987e5;
    --series-extra: #008300;
    --good: #0ca30c;
    --bad: #e66767;
    --accent: #3987e5;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--page);
  color: var(--ink);
  line-height: 1.5;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

main { max-width: 900px; margin: 0 auto; padding: 0 1rem 3rem; }

.app-header { max-width: 900px; margin: 0 auto; padding: 1.5rem 1rem 0.5rem; }
.app-header h1 { margin: 0; font-size: 1.6rem; }
.subtitle { margin: 0.15rem 0 0; color: var(--ink-secondary); font-size: 0.95rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}

h2 { font-size: 1.1rem; margin: 0.25rem 0 0.75rem; }
h3 { font-size: 1rem; margin: 1rem 0 0.5rem; }

.field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem 1rem;
}

label { display: flex; flex-direction: column; font-size: 0.9rem; color: var(--ink-secondary); gap: 0.25rem; }

input, select {
  font: inherit;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--axis);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  min-width: 0;
}

input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.hint { color: var(--ink-muted); font-size: 0.8rem; }

.inline-options { border: none; padding: 0; margin: 1rem 0 0.75rem; display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.inline-options legend { font-size: 0.9rem; color: var(--ink-secondary); padding: 0; margin-bottom: 0.4rem; }
.inline-options label { flex-direction: row; align-items: center; gap: 0.4rem; color: var(--ink); }

.dynamic-list { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 0.5rem; }
.dynamic-row { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: end; }
.dynamic-row label { flex: 1 1 130px; }
.dynamic-row .remove { flex: 0 0 auto; }

button, .button-like {
  font: inherit;
  border-radius: 8px;
  border: 1px solid var(--axis);
  background: var(--surface);
  color: var(--ink);
  padding: 0.45rem 0.9rem;
  cursor: pointer;
}

button:hover, .button-like:hover { border-color: var(--accent); color: var(--accent); }
.danger:hover { border-color: var(--bad); color: var(--bad); }
.button-like { display: inline-flex; align-items: center; }

.note { font-size: 0.85rem; color: var(--ink-muted); margin: 0.75rem 0 0; }
.error { color: var(--bad); font-weight: 600; }
.hidden { display: none !important; }

.results-title { margin-top: 1.5rem; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem 1rem;
}

.stat .label { font-size: 0.8rem; color: var(--ink-secondary); }
.stat .value { font-size: 1.25rem; font-weight: 650; margin-top: 0.15rem; }
.stat .detail { font-size: 0.8rem; color: var(--ink-muted); margin-top: 0.1rem; }
.stat .value.good { color: var(--good); }
.stat .value.bad { color: var(--bad); }

.chart-host { position: relative; width: 100%; }
.chart-host svg { display: block; width: 100%; height: auto; }

.chart-legend { display: flex; gap: 1.25rem; flex-wrap: wrap; font-size: 0.85rem; color: var(--ink-secondary); margin-bottom: 0.5rem; }
.chart-legend .swatch { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 0.4rem; }

.chart-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.4rem 0.6rem;
  font-size: 0.8rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  white-space: nowrap;
  z-index: 10;
}

.table-wrap { overflow-x: auto; max-height: 420px; overflow-y: auto; margin-top: 0.5rem; }

table { border-collapse: collapse; width: 100%; font-size: 0.82rem; }
th, td { text-align: right; padding: 0.3rem 0.5rem; border-bottom: 1px solid var(--grid); font-variant-numeric: tabular-nums; }
th { position: sticky; top: 0; background: var(--surface); color: var(--ink-secondary); font-weight: 600; }
td:first-child, th:first-child, td:nth-child(2), th:nth-child(2) { text-align: left; }
tr.has-extra td { background: color-mix(in srgb, var(--series-extra) 8%, transparent); }

details summary { cursor: pointer; list-style: none; display: flex; align-items: center; }
details summary h3 { margin: 0; }
details summary::before { content: "▸"; margin-right: 0.5rem; color: var(--ink-muted); transition: transform 0.15s; }
details[open] summary::before { transform: rotate(90deg); }

.toolbar { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.home-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 1rem; }
.home-head h2 { margin: 0; }
#new-loan { border-color: var(--accent); color: var(--accent); font-weight: 600; }

.loan-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 0.75rem; margin-top: 1rem; }

.loan-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.loan-card:hover { border-color: var(--accent); color: var(--ink); }
.loan-card .loan-name { font-weight: 650; font-size: 1.05rem; }
.loan-card .loan-line { font-size: 0.85rem; color: var(--ink-secondary); }
.loan-card .loan-line strong { color: var(--ink); font-variant-numeric: tabular-nums; }
.loan-card .loan-incomplete { font-size: 0.85rem; color: var(--ink-muted); font-style: italic; }

.back { margin-top: 1rem; }

footer { max-width: 900px; margin: 0 auto; padding: 0 1rem 2rem; color: var(--ink-muted); font-size: 0.78rem; }