/* Infinite Banking Calculator: editorial financial-document aesthetic.
   Tokens first, no magic values scattered around. */

:root {
  --paper: #faf8f3;
  --card: #ffffff;
  --ink: #17211c;
  --muted: #5d665f;
  --line: #e4ded1;
  --green: #1e6b46;
  --green-dark: #134a30;
  --navy: #2b4a7a;
  --gray: #9aa39c;
  --warn-bg: #fdf3e4;
  --warn-ink: #8a5a1e;
  --warn-line: #ecd3a3;
  --red: #b23a2e;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(23, 33, 28, 0.06), 0 8px 24px rgba(23, 33, 28, 0.06);
  --serif: Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* Header */

.site-head { padding: 56px 0 36px; border-bottom: 1px solid var(--line); }

.brand {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  font-weight: 700;
  margin: 0 0 12px;
}

.site-head h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  max-width: 18em;
}

.lede { font-size: 1.08rem; color: var(--muted); max-width: 44em; margin: 0; }

/* Calculator layout */

.calc {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 24px;
  padding: 32px 0 8px;
  align-items: start;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

.panel h2, .chart-card h3, .loan-card h3 {
  font-family: var(--serif);
  font-weight: 600;
  margin: 0 0 4px;
  font-size: 1.25rem;
}

fieldset { border: 0; padding: 0; margin: 18px 0 0; }
fieldset + fieldset { border-top: 1px solid var(--line); padding-top: 18px; }

legend {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--green);
  padding: 0;
  margin-bottom: 4px;
}

.field { display: block; margin: 16px 0; }

.field-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-weight: 600;
  font-size: 0.94rem;
  margin-bottom: 6px;
}

.val {
  font-variant-numeric: tabular-nums;
  color: var(--green-dark);
  background: #eef4ef;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 8px;
  font-size: 0.86rem;
  white-space: nowrap;
}

.hint { display: block; font-size: 0.8rem; color: var(--muted); margin-top: 6px; line-height: 1.5; }

input[type="range"] {
  width: 100%;
  accent-color: var(--green);
  margin: 2px 0;
  height: 28px;
}

.check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.84rem;
  color: var(--muted);
  margin: 16px 0 4px;
  line-height: 1.5;
}

.check input { margin-top: 4px; accent-color: var(--green); flex-shrink: 0; }

/* Results */

.results { min-width: 0; }

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}

.card-label { font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 0 0 6px; font-weight: 700; }
.card-num { font-family: var(--serif); font-size: 1.55rem; margin: 0; font-variant-numeric: tabular-nums; color: var(--ink); }
.card-sub { font-size: 0.8rem; color: var(--muted); margin: 4px 0 0; }

.chart-card, .loan-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  margin-bottom: 16px;
}

.chart-wrap { position: relative; margin-top: 12px; }
#chart { width: 100%; height: 340px; display: block; cursor: crosshair; }

.tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--ink);
  color: #fff;
  font-size: 0.78rem;
  border-radius: 8px;
  padding: 8px 10px;
  line-height: 1.5;
  white-space: nowrap;
  transform: translate(-50%, calc(-100% - 10px));
  z-index: 5;
  font-variant-numeric: tabular-nums;
}

.legend {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding: 12px 0 0;
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.legend li { display: flex; align-items: center; gap: 8px; }
.sw { width: 22px; height: 4px; border-radius: 2px; display: inline-block; }
.sw-cv { background: var(--green); }
.sw-prem { background: repeating-linear-gradient(90deg, var(--gray) 0 5px, transparent 5px 9px); }
.sw-db { background: var(--navy); }
.sw-loan { background: rgba(178, 58, 46, 0.25); border: 1px solid rgba(178, 58, 46, 0.4); height: 12px; border-radius: 3px; }

/* Loan comparison */

.loan-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 14px;
}

.loan-col {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
}

.loan-name { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 700; color: var(--muted); margin: 0 0 4px; }
.loan-pay { font-family: var(--serif); font-size: 1.7rem; margin: 0; font-variant-numeric: tabular-nums; }
.loan-pay span { font-size: 0.9rem; color: var(--muted); font-family: var(--sans); }
.loan-line { margin: 8px 0 4px; font-size: 0.94rem; font-variant-numeric: tabular-nums; }
.loan-note { font-size: 0.82rem; color: var(--muted); margin: 0 0 10px; }

.bar { height: 10px; background: #f0ece1; border-radius: 5px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 5px; transition: width 150ms ease-out; }
.bar-policy { background: var(--green); }
.bar-bank { background: var(--red); }

.loan-verdict {
  margin: 16px 0 0;
  font-size: 1rem;
  background: #eef4ef;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  font-variant-numeric: tabular-nums;
}

.loan-cvnote { font-size: 0.86rem; color: var(--muted); margin: 10px 0 0; font-variant-numeric: tabular-nums; }

.loan-warn {
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  color: var(--warn-ink);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.88rem;
  margin: 12px 0 0;
}

/* Table */

.table-details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 22px;
  margin-bottom: 16px;
}

.table-details summary { cursor: pointer; font-weight: 600; padding: 6px 0; }
.table-scroll { overflow-x: auto; margin-top: 8px; }

table { border-collapse: collapse; width: 100%; font-size: 0.84rem; font-variant-numeric: tabular-nums; }
th, td { text-align: right; padding: 7px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
thead th { font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
tbody tr:hover { background: #f7f4ec; }

/* Explainer */

.explainer { max-width: 46em; padding: 32px 0 8px; }
.explainer h2 { font-family: var(--serif); font-size: 1.7rem; margin: 0 0 8px; }
.explainer h3 { font-family: var(--serif); font-size: 1.2rem; margin: 28px 0 8px; color: var(--green-dark); }
.explainer p { color: #2c352f; margin: 0 0 14px; }

/* Footer */

.site-foot { border-top: 1px solid var(--line); margin-top: 32px; padding: 24px 0 48px; }
.site-foot p { font-size: 0.82rem; color: var(--muted); max-width: 62em; margin: 0; }

/* Responsive */

@media (max-width: 920px) {
  .calc { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .site-head { padding: 40px 0 28px; }
}

@media (max-width: 560px) {
  .loan-grid { grid-template-columns: 1fr; }
  #chart { height: 280px; }
  .card-num { font-size: 1.3rem; }
}

/* Reduced motion: transitions are already minimal; kill the rest. */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bar-fill { transition: none; }
}