:root {
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink-primary: #0b0b0b;
  --ink-secondary: #52514e;
  --ink-muted: #898781;
  --gridline: #e1e0d9;
  --border: rgba(11, 11, 11, 0.10);
  --brand: #2a78d6;
  --accent-red: #e34948;
  --accent-orange: #eb6834;
  --good: #0ca30c;
  --good-text: #006300;
  --radius: 10px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink-primary: #ffffff;
    --ink-secondary: #c3c2b7;
    --ink-muted: #898781;
    --gridline: #2c2c2a;
    --border: rgba(255, 255, 255, 0.10);
    --brand: #3987e5;
    --accent-red: #e66767;
    --accent-orange: #d95926;
    --good: #0ca30c;
    --good-text: #0ca30c;
  }
}

* { box-sizing: border-box; }

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

.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* ---------- Hero ---------- */
.hero {
  background: var(--surface);
  border-bottom: 1px solid var(--gridline);
  padding: 56px 0 40px;
  text-align: center;
}
.hero .brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--brand);
  margin: 0 0 12px;
  text-transform: uppercase;
  font-size: 0.85rem;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0 0 16px;
  line-height: 1.15;
}
.hero-sub {
  color: var(--ink-secondary);
  max-width: 620px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
}
.cta {
  display: inline-block;
  background: var(--accent-red);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 999px;
  transition: opacity 0.15s ease;
}
.cta:hover { opacity: 0.88; }

/* ---------- Layout ---------- */
.layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 8px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
@media (min-width: 900px) {
  .layout { grid-template-columns: 1.1fr 0.9fr; align-items: start; }
  .form-panel { order: 1; }
  .results-panel { order: 2; position: sticky; top: 20px; }
}

/* ---------- Form ---------- */
.form-panel { display: flex; flex-direction: column; gap: 20px; }

.section {
  background: var(--surface);
  border: 1px solid var(--gridline);
  border-radius: var(--radius);
  padding: 18px 20px 6px;
}
.section legend, .section > summary {
  font-weight: 700;
  padding: 0 6px;
  font-size: 0.95rem;
}
.section > summary {
  cursor: pointer;
  list-style: none;
  padding: 4px 0;
}
.section > summary::-webkit-details-marker { display: none; }
.section > summary::after {
  content: '▸';
  float: right;
  color: var(--ink-muted);
  transition: transform 0.15s ease;
}
.section[open] > summary::after { transform: rotate(90deg); }
.advanced { padding: 14px 20px; }
.advanced .field { margin-top: 14px; }

.field { margin-bottom: 16px; }
.field label, .field-label-static {
  display: block;
  font-size: 0.88rem;
  color: var(--ink-secondary);
  margin-bottom: 6px;
}
.hint { color: var(--ink-muted); font-weight: 400; }

input[type="number"], select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--gridline);
  background: var(--page);
  color: var(--ink-primary);
  font-size: 1rem;
  font-family: inherit;
}
input[type="number"]:focus, select:focus {
  outline: 2px solid var(--brand);
  outline-offset: 1px;
}

/* Hide native spinner arrows; replaced with custom steppers in script.js */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}

.number-field {
  position: relative;
}
.number-field input[type="number"] {
  padding-right: 34px;
}
.num-steppers {
  position: absolute;
  top: 1px;
  right: 1px;
  bottom: 1px;
  width: 28px;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--gridline);
  border-radius: 0 7px 7px 0;
  overflow: hidden;
}
.num-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--surface);
  color: var(--ink-secondary);
  cursor: pointer;
  padding: 0;
  line-height: 1;
  font-size: 0.7rem;
}
.num-btn:first-child { border-bottom: 1px solid var(--gridline); }
.num-btn:hover { background: var(--brand); color: #fff; }
.num-btn:active { background: var(--brand); opacity: 0.85; }

.segmented {
  display: inline-flex;
  border: 1px solid var(--gridline);
  border-radius: 999px;
  overflow: hidden;
}
.segmented-opt {
  margin: 0 !important;
  padding: 8px 16px !important;
  font-size: 0.88rem !important;
  cursor: pointer;
  color: var(--ink-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.segmented-opt:has(input:checked) {
  background: var(--brand);
  color: #fff;
}
.segmented-opt input { accent-color: #fff; }

.mode-fields, .income-field { padding-top: 2px; }

/* ---------- Results ---------- */
.results-panel { display: flex; flex-direction: column; gap: 16px; }

.result-card {
  background: var(--surface);
  border: 1px solid var(--gridline);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.result-label {
  margin: 0 0 6px;
  font-size: 0.85rem;
  color: var(--ink-secondary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.hero-result {
  border-color: var(--accent-red);
  position: relative;
  padding-bottom: 28px;
  overflow: hidden;
}
.hero-result::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 12px;
  background:
    linear-gradient(135deg, var(--page) 50%, transparent 50%) 0 -1px / 16px 16px repeat-x,
    linear-gradient(-135deg, var(--page) 50%, transparent 50%) 0 -1px / 16px 16px repeat-x;
  filter: drop-shadow(0 1px 0 var(--gridline)) drop-shadow(0 -1px 1px rgba(0,0,0,0.08));
}
.hero-number {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(2rem, 5.4vw, 2.7rem);
  font-weight: 700;
  color: var(--accent-red);
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}
.stat-number {
  margin: 0;
  font-family: var(--mono);
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.stat-number-bold {
  font-size: clamp(1.8rem, 4.6vw, 2.3rem);
  font-weight: 800;
}
.accent-orange { color: var(--accent-orange); }
.accent-blue { color: var(--brand); }
.accent-green { color: var(--good-text); }
.result-sub { margin: 8px 0 0; color: var(--ink-secondary); font-size: 0.92rem; }
.result-sub-mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.mini-stats {
  display: flex;
  gap: 28px;
  margin-top: 12px;
}
.mini-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.mini-stat-value {
  font-family: var(--mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink-primary);
  font-variant-numeric: tabular-nums;
}
.mini-stat-label {
  font-size: 0.8rem;
  color: var(--ink-secondary);
}

/* ---------- Breakdown bars ---------- */
.breakdown { margin-top: 10px; display: flex; flex-direction: column; gap: 10px; }
.bd-row {
  display: grid;
  grid-template-columns: 108px 1fr 76px;
  align-items: center;
  gap: 10px;
}
.bd-label { font-size: 0.85rem; color: var(--ink-secondary); }
.bd-track {
  height: 10px;
  background: var(--gridline);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}
.bd-fill {
  height: 100%;
  background: var(--brand);
  border-radius: 6px;
  min-width: 4px;
}
.bd-negative .bd-fill { background: var(--good); }
.bd-negative .bd-value { color: var(--good-text); }
.bd-value { font-family: var(--mono); font-size: 0.82rem; font-weight: 600; text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- Fact card ---------- */
.fact-card { border-left: 3px solid var(--brand); }
.fact-header { display: flex; align-items: center; justify-content: space-between; }
.fact-nav { display: flex; gap: 6px; }
.fact-nav button {
  width: 26px; height: 26px;
  border: 1px solid var(--gridline);
  border-radius: 6px;
  background: var(--page);
  color: var(--ink-secondary);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  display: flex; align-items: center; justify-content: center;
}
.fact-nav button:hover { border-color: var(--brand); color: var(--brand); }
.fact-text {
  margin: 8px 0 6px;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink-primary);
  min-height: 4.5em;
  transition: opacity 0.2s ease;
}
.fact-text.fading { opacity: 0; }
.fact-source { margin: 0; font-size: 0.78rem; color: var(--ink-muted); }
.fact-source a { color: var(--ink-muted); }

/* ---------- Share ---------- */
.share-text {
  width: 100%;
  resize: none;
  border: 1px solid var(--gridline);
  border-radius: 8px;
  background: var(--page);
  color: var(--ink-primary);
  font-family: inherit;
  font-size: 0.88rem;
  padding: 10px 12px;
}
.share-buttons { display: flex; gap: 10px; margin-top: 10px; }
.share-buttons button {
  flex: 1;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--gridline);
  background: var(--surface);
  color: var(--ink-primary);
  font-weight: 600;
  cursor: pointer;
}
.share-buttons button:hover { border-color: var(--brand); color: var(--brand); }
.copy-confirm { min-height: 1.2em; margin: 8px 0 0; font-size: 0.85rem; color: var(--good-text); }

/* ---------- Methodology / footer ---------- */
.methodology { padding: 40px 20px 20px; color: var(--ink-secondary); }
.methodology h2 { color: var(--ink-primary); font-size: 1.2rem; }
.methodology h3 { color: var(--ink-primary); font-size: 1rem; margin-top: 28px; }
.disclaimer { font-size: 0.85rem; color: var(--ink-muted); }
.sources {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
  font-size: 0.85rem;
}
.sources a { color: var(--brand); }
.footer { padding: 20px; color: var(--ink-muted); font-size: 0.85rem; text-align: center; }

/* ---------- Public case ---------- */
.public-case {
  background: var(--surface);
  border-top: 1px solid var(--gridline);
  border-bottom: 1px solid var(--gridline);
  padding: 40px 0 48px;
  margin-top: 20px;
}
.public-case h2 { font-size: 1.3rem; margin-bottom: 14px; }
.public-case .lead {
  color: var(--ink-secondary);
  max-width: 760px;
  font-size: 1.02rem;
  margin-bottom: 28px;
}
.public-case .lead a, .pillar a { color: var(--brand); }
.pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 700px) {
  .pillars { grid-template-columns: 1fr 1fr; }
}
.pillar {
  background: var(--page);
  border: 1px solid var(--gridline);
  border-left: 3px solid var(--accent-orange);
  border-radius: 8px;
  padding: 18px 20px;
}
.pillar h3 { margin: 0 0 8px; font-size: 1rem; color: var(--ink-primary); }
.pillar p { margin: 0; font-size: 0.9rem; color: var(--ink-secondary); }