/* Financial Digital Twin — all styling.
   Tokens are defined on bare :root so a colour always has a value; the dark palette
   only redefines tokens. */

:root {
  color-scheme: light dark;

  --bg: #f6f7f5;
  --surface: #ffffff;
  --surface-2: #eef0ed;
  --border: #d5d9d3;
  --border-strong: #b4bab1;
  --text: #1b201d;
  --text-quiet: #5c645f;
  --accent: #1f6f5c;
  --accent-text: #ffffff;
  --accent-quiet: #e3f0eb;
  --positive: #1c6b45;
  --negative: #9c2f2f;
  --warn-bg: #fdf5e3;
  --warn-border: #d9bd77;
  --error-bg: #fbeceb;
  --error-border: #d29a96;

  --radius: 8px;
  --gap: 1rem;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141715;
    --surface: #1d211f;
    --surface-2: #262b28;
    --border: #343a37;
    --border-strong: #4c534f;
    --text: #e8ece9;
    --text-quiet: #a3aca7;
    --accent: #5fbfa1;
    --accent-text: #10201a;
    --accent-quiet: #1f2f2a;
    --positive: #6fc79b;
    --negative: #e08d88;
    --warn-bg: #2e2716;
    --warn-border: #6b5a2c;
    --error-bg: #2f1d1c;
    --error-border: #6d3b38;
  }
}

:root[data-theme="dark"] {
  --bg: #141715;
  --surface: #1d211f;
  --surface-2: #262b28;
  --border: #343a37;
  --border-strong: #4c534f;
  --text: #e8ece9;
  --text-quiet: #a3aca7;
  --accent: #5fbfa1;
  --accent-text: #10201a;
  --accent-quiet: #1f2f2a;
  --positive: #6fc79b;
  --negative: #e08d88;
  --warn-bg: #2e2716;
  --warn-border: #6b5a2c;
  --error-bg: #2f1d1c;
  --error-border: #6d3b38;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 { line-height: 1.25; margin: 0 0 0.5rem; }
h1 { font-size: 1.05rem; font-weight: 650; letter-spacing: -0.01em; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1rem; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-text);
  padding: 0.5rem 0.9rem;
  z-index: 10;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

/* ---- header ---- */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  flex-wrap: wrap;
  padding: 0.7rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 0.55rem; }
.brand-mark { font-size: 1.15rem; }

.header-meta { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

.chip {
  display: inline-block;
  font-size: 0.78rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-quiet);
  color: var(--text);
  border: 1px solid var(--border);
  white-space: nowrap;
}
.chip-quiet { background: var(--surface-2); color: var(--text-quiet); }

/* ---- layout ---- */

.app-body {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  flex: 1;
  align-items: start;
}

.app-nav {
  padding: 0.9rem 0.6rem;
  border-right: 1px solid var(--border);
  position: sticky;
  top: 0;
}
.app-nav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }

.nav-btn {
  display: block;
  width: 100%;
  text-align: left;
  font: inherit;
  color: var(--text-quiet);
  background: none;
  border: 0;
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
}
.nav-btn:hover { background: var(--surface-2); color: var(--text); }
.nav-btn[aria-current="page"] {
  background: var(--accent-quiet);
  color: var(--text);
  font-weight: 600;
  box-shadow: inset 2px 0 0 var(--accent);
}

.app-main { padding: 1.1rem 1.2rem 2rem; min-width: 0; }

.app-footer {
  border-top: 1px solid var(--border);
  padding: 0.9rem 1.2rem;
  color: var(--text-quiet);
  font-size: 0.82rem;
  background: var(--surface);
}
.app-footer p { margin: 0 0 0.3rem; max-width: 70ch; }
.footer-privacy { font-weight: 600; }

/* ---- notices ---- */

.notice {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  margin: 0 0 var(--gap);
}
.notice-warn { background: var(--warn-bg); border-color: var(--warn-border); }
.notice-error { background: var(--error-bg); border-color: var(--error-border); }

/* ---- tables ---- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  font-size: 0.88rem;
}
.data-table th, .data-table td {
  padding: 0.35rem 0.6rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.data-table td.num, .data-table th.num { text-align: right; font-family: var(--mono); }
.data-table tbody tr:hover { background: var(--surface-2); }

.scroll-x { overflow-x: auto; max-width: 100%; }

.amount-negative { color: var(--negative); }
.amount-negative::before { content: "−"; }
.amount-positive { color: var(--positive); }

@media (max-width: 700px) {
  .app-body { grid-template-columns: 1fr; }
  .app-nav {
    position: static;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
  .app-nav ul { grid-auto-flow: column; overflow-x: auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---- toolbar and banners ---- */

.toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: var(--gap);
}
.toolbar label { color: var(--text-quiet); font-size: 0.85rem; }

button, select, input[type="text"], input[type="number"], input[type="date"] {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 0.35rem 0.6rem;
}
button { cursor: pointer; }
button:hover { background: var(--surface-2); }
button.danger { color: var(--negative); border-color: var(--negative); }
button.danger:hover { background: var(--error-bg); }

.banner { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }

/* ---- panels ---- */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  margin: 0 0 var(--gap);
}
.panel h3 { margin-top: 0; }
.muted { color: var(--text-quiet); font-size: 0.88rem; }
.emphasis { font-weight: 650; }

.columns { display: grid; gap: var(--gap); grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* ---- KPI tiles ---- */

.kpi-row {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  margin-bottom: var(--gap);
}
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 0.7rem 0.85rem;
}
.kpi-good { border-left-color: var(--positive); }
.kpi-warn { border-left-color: var(--warn-border); }
.kpi-bad  { border-left-color: var(--negative); }

.kpi-label { font-size: 0.8rem; color: var(--text-quiet); }
.kpi-value { font-size: 1.4rem; font-weight: 650; font-variant-numeric: tabular-nums; margin: 0.15rem 0; }
.kpi-hint { font-size: 0.78rem; color: var(--text-quiet); }
.kpi-definition { margin-top: 0.4rem; font-size: 0.78rem; color: var(--text-quiet); }
.kpi-definition summary { cursor: pointer; }
.kpi-definition p { margin: 0.3rem 0 0; }

/* ---- charts ---- */

.chart-figure {
  margin: 0 0 var(--gap);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
}
.chart-title { font-weight: 650; font-size: 1rem; margin-bottom: 0.2rem; }
.chart-description, .chart-note { color: var(--text-quiet); font-size: 0.85rem; margin: 0 0 0.6rem; max-width: 70ch; }
.chart-disclaimer { color: var(--text-quiet); font-size: 0.78rem; font-style: italic; margin: 0.5rem 0 0; }
.chart-canvas { position: relative; width: 100%; }
.chart-data { margin-top: 0.6rem; }
.chart-data summary { cursor: pointer; font-size: 0.85rem; color: var(--text-quiet); }
.chart-data .data-table { margin-top: 0.5rem; }

/* ---- uncertainty strip ---- */

.strip { display: grid; gap: var(--gap); grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); margin-bottom: var(--gap); }
.strip-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 0.6rem 0.8rem; background: var(--surface-2); }
.strip-label { font-size: 0.8rem; color: var(--text-quiet); }
.strip-value { font-size: 1.2rem; font-weight: 650; font-variant-numeric: tabular-nums; }
.strip-hint { font-size: 0.78rem; color: var(--text-quiet); }

/* ---- forms ---- */

.field-grid { display: grid; gap: 0.7rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.field { display: flex; flex-direction: column; gap: 0.25rem; }
.field label { font-size: 0.82rem; color: var(--text-quiet); }
.field-help { font-size: 0.78rem; color: var(--text-quiet); margin: 0; }
.field-bool { flex-direction: row; align-items: center; gap: 0.5rem; }
.field-bool label { order: 2; }

.advanced { margin-top: 0.7rem; }
.advanced summary { cursor: pointer; font-size: 0.85rem; color: var(--text-quiet); }
.advanced .field-grid { margin-top: 0.6rem; }

.source-card.disabled { opacity: 0.62; }
.source-header { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 0.5rem; }
.source-header h3 { margin: 0; }
.source-header button { margin-left: auto; }

.type-picker h4 { font-size: 0.82rem; color: var(--text-quiet); margin: 0.6rem 0 0.3rem; font-weight: 600; }
.type-row { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.type-button { background: var(--accent-quiet); border-color: var(--border); }

/* ---- warnings, attribution, lists ---- */

.warning-list, .upcoming-list, .attribution-list, .override-list { list-style: none; margin: 0; padding: 0; }

.warning { border-left: 3px solid var(--border-strong); padding: 0.4rem 0 0.4rem 0.7rem; margin-bottom: 0.6rem; }
.warning-error { border-left-color: var(--negative); }
.warning-warn { border-left-color: var(--warn-border); }
.warning-info { border-left-color: var(--border-strong); }
.warning p { margin: 0.15rem 0 0; font-size: 0.86rem; color: var(--text-quiet); }
.warning-severity { font-size: 0.78rem; color: var(--text-quiet); }

.upcoming-list li { display: flex; gap: 0.6rem; align-items: baseline; padding: 0.25rem 0; border-bottom: 1px solid var(--border); }
.upcoming-date { font-family: var(--mono); font-size: 0.8rem; color: var(--text-quiet); }
.upcoming-label { flex: 1; }
.upcoming-amount { font-family: var(--mono); font-variant-numeric: tabular-nums; }

.attribution-headline { font-size: 1.02rem; font-weight: 600; }
.attribution-line { display: flex; gap: 0.6rem; align-items: baseline; padding: 0.3rem 0; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.attribution-amount { font-family: var(--mono); font-variant-numeric: tabular-nums; min-width: 8ch; text-align: right; }
.attribution-label { font-weight: 600; }
.attribution-reason { color: var(--text-quiet); font-size: 0.85rem; }
.attribution-derived .attribution-label { font-weight: 400; font-style: italic; }

.override { padding: 0.25rem 0; font-size: 0.88rem; }
.override-unknown-path, .override-dangling, .override-type-mismatch { color: var(--negative); }

.tax-year { margin-bottom: var(--gap); }
.tax-year h4 { margin-bottom: 0.4rem; }

/* ---- simple / advanced switch ---- */

.mode-toggle { display: flex; align-items: center; gap: 0.4rem; }
.mode-label { font-size: 0.72rem; color: var(--text-quiet); text-transform: uppercase; letter-spacing: 0.04em; }

.mode-button {
  font-size: 0.8rem;
  padding: 0.22rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  color: var(--text-quiet);
}
.mode-button.mode-on {
  background: var(--accent-quiet);
  border-color: var(--accent);
  color: var(--text);
  font-weight: 600;
}

.panel-prompt { border-left: 3px solid var(--accent); }
.panel-prompt ul { margin: 0.4rem 0 0.8rem; padding-left: 1.1rem; }
.panel-prompt li { margin-bottom: 0.3rem; color: var(--text-quiet); font-size: 0.9rem; }

.boot-command {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  margin: 0.5rem 0;
  white-space: pre-wrap;
}