/* Our Bond Plan — shared styles. No external fonts or CSS. */

:root {
  --ink: #1d232a;
  --muted: #4d5966;
  --line: #d9dee3;
  --card: #ffffff;
  --page: #f6f8f9;
  --accent: #0f4c81;

  /* Tier colours. Each accent passes WCAG AA as text on white and as white-on-accent. */
  --t1: #1b7f3b; --t1-bg: #ddf3e4;
  --t2: #4a7a15; --t2-bg: #e9f3d6;
  --t3: #1f5fa8; --t3-bg: #dce9f8;
  --t4: #a35f00; --t4-bg: #ffecc7;
  --t5: #c2410c; --t5-bg: #fde2d3;

  --radius: 16px;
  --shadow: 0 1px 2px rgba(0,0,0,0.06);
}

* { box-sizing: border-box; }

html { font-size: 20px; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--ink);
  background: var(--page);
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
}

@media (min-width: 700px) {
  .wrap { padding: 2rem 1.5rem; }
}

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5rem; }
h1 { font-size: 2.1rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 0.75rem; }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, select:focus-visible, input:focus-visible {
  outline: 3px solid #0f4c81;
  outline-offset: 2px;
}

.site-header { margin-bottom: 1.5rem; }
.site-header .kicker {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}
.site-header p.lead { color: var(--muted); font-size: 1.1rem; max-width: 40rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.small { font-size: 0.9rem; color: var(--muted); }
.tiny { font-size: 0.8rem; color: var(--muted); }
.nowrap { white-space: nowrap; }

/* Inputs */
.inputs { display: grid; gap: 1rem; }
@media (min-width: 700px) {
  .inputs { grid-template-columns: 1fr 1fr; align-items: end; }
  .inputs .field label { min-height: 3rem; display: flex; align-items: flex-end; }
}
@media (min-width: 1000px) { .inputs { grid-template-columns: 1fr 1fr 1fr 1fr; } }
.field label { display: block; font-weight: 600; margin-bottom: 0.3rem; }
.field select, .field input {
  width: 100%;
  height: 3rem;
  font: inherit;
  font-size: 1.1rem;
  padding: 0 0.7rem;
  border: 2px solid #8a949e;
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}
.field .help { margin: 0.3rem 0 0; }

/* Optional allocation sliders */
.advanced { margin: 1rem 0 0; padding: 0.5rem 1rem; border-color: var(--line); background: var(--page); }
.advanced summary { font-size: 1rem; }
.sliders { display: grid; gap: 0.75rem; margin: 0.5rem 0; }
@media (min-width: 700px) { .sliders { grid-template-columns: 1fr 1fr; } }
.slider label, .slider span { display: flex; justify-content: space-between; font-weight: 600; margin-bottom: 0.2rem; }
.slider output { font-weight: 700; color: var(--accent); }
.slider input[type="range"] { width: 100%; accent-color: var(--accent); height: 2rem; }
.slider.balance { padding: 0.5rem 0.75rem; border-radius: 10px; background: #fff; border: 1px solid var(--line); align-self: end; }
.warn { color: var(--t5); font-weight: 600; }
.btn { font: inherit; font-weight: 600; padding: 0.5rem 1rem; border-radius: 10px; border: 2px solid var(--accent); background: #fff; color: var(--accent); cursor: pointer; margin: 0.25rem 0 0.5rem; }
.btn:hover { background: var(--accent); color: #fff; }

/* Headline cards */
.big-number {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
@media (min-width: 700px) { .big-number { font-size: 3.2rem; } }
.beside {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--muted);
  margin-left: 0.4rem;
}
.headline-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.25rem 0.5rem; margin-bottom: 0.5rem; }
.result-card { border-left: 8px solid var(--t1); }
.result-card.ten-year { border-left-color: var(--t2); }
.result-card.danger { border-left-color: var(--t5); background: var(--t5-bg); }
.result-card.danger .beside { color: var(--ink); }
.ten-year-grid { display: grid; gap: 1rem; align-items: center; }
@media (min-width: 700px) { .ten-year-grid { grid-template-columns: 1fr auto; } }
.sparkline { width: 100%; max-width: 260px; height: 70px; display: block; }

/* Waterfall */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0.5rem 0 1rem;
  padding: 0;
  list-style: none;
  font-size: 0.9rem;
}
.legend li { display: flex; align-items: center; gap: 0.4rem; }
.swatch { width: 18px; height: 18px; border-radius: 5px; flex: none; }

.tier {
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  border: 1px solid transparent;
  box-shadow: var(--shadow);
  background: #fff;
}
.tier-1 { background: var(--t1-bg); border-color: var(--t1); --tc: var(--t1); }
.tier-2 { background: var(--t2-bg); border-color: var(--t2); --tc: var(--t2); }
.tier-3 { background: var(--t3-bg); border-color: var(--t3); --tc: var(--t3); }
.tier-4 { background: var(--t4-bg); border-color: var(--t4); --tc: var(--t4); }
.tier-5 { background: var(--t5-bg); border-color: var(--t5); --tc: var(--t5); }

.tier-head { display: flex; gap: 0.75rem; align-items: flex-start; margin-bottom: 0.75rem; }
.tier-head svg { width: 42px; height: 42px; flex: none; color: var(--tc); }
.tier-head h3 { margin: 0; }
.tier-head .risk { font-size: 0.9rem; font-weight: 600; color: var(--tc); text-transform: uppercase; letter-spacing: 0.03em; }
.tier-desc { margin: 0 0 0.9rem; font-size: 1.05rem; }

.tier-body { display: grid; gap: 1rem; }
@media (min-width: 700px) { .tier-body { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: stretch; } }
.tier-right { display: flex; flex-direction: column; }
.tier-right .tier-summary { margin-top: auto; }
.explain-link { margin: 0.4rem 0 0; }

.blocks { display: flex; flex-wrap: wrap; gap: 8px; }
.block {
  width: 96px;
  height: 72px;
  border-radius: 10px;
  background: var(--tc);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 6px 9px;
  overflow: hidden;
  opacity: 0.95;
}
.block.partial { position: relative; background: transparent; border: 2px dashed var(--tc); color: var(--tc); justify-content: flex-end; }
.block.partial .fill {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: var(--tc);
  border-radius: 6px 0 0 6px;
}
.block.partial span { position: relative; }
.blocks-empty { font-size: 0.9rem; color: var(--muted); font-style: italic; }
.lot-line { margin: 0.5rem 0 0; font-size: 0.95rem; color: var(--muted); }

.tier-summary {
  background: rgba(255,255,255,0.7);
  border-radius: 12px;
  padding: 0.7rem 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
}
.tier-summary .stat { min-width: 7rem; }
.tier-summary .yield { font-size: 1.8rem; line-height: 1.2; font-weight: 700; color: var(--tc); }
.tier-summary .coupons { font-size: 1.15rem; font-weight: 600; line-height: 1.3; padding-top: 0.35rem; white-space: nowrap; }
.tier-summary .label { font-size: 0.85rem; color: var(--muted); }

.arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  margin: 0.35rem 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
}
.arrow svg { width: 18px; height: 26px; }

.inset {
  margin-top: 1rem;
  background: #fff;
  border: 1px solid var(--t5);
  border-radius: 12px;
  padding: 0.9rem 1rem;
}
.inset h4 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.inset > p { margin-bottom: 0.5rem; }
.inset details { margin: 0.5rem 0 0; padding: 0.4rem 0.9rem; border-color: var(--t5-bg); background: #fff8f4; }
.inset details summary { font-size: 0.95rem; }
.inset ul { margin: 0 0 0.5rem; padding-left: 1.2rem; }
.inset li { margin-bottom: 0.35rem; }

/* Rules */
.rules ol { padding-left: 1.4rem; margin: 0; }
.rules li { margin-bottom: 0.7rem; }
.why { display: block; font-size: 0.85rem; color: var(--muted); }

/* Assumptions */
details { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 0.75rem 1.25rem; margin-bottom: 1.25rem; }
details summary { cursor: pointer; font-weight: 600; padding: 0.4rem 0; }
details ul { padding-left: 1.2rem; }
details li { margin-bottom: 0.3rem; }

.disclaimer { color: var(--muted); font-size: 0.9rem; text-align: center; margin: 1.5rem 0 0.5rem; }

/* Explainer pages */
.back {
  display: inline-block;
  margin: 0.25rem 0 1.25rem;
  font-weight: 700;
  font-size: 1.15rem;
  padding: 0.7rem 1.2rem;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}
.back:hover, .back:focus-visible { background: #0b3a63; }
.section-grid { display: grid; gap: 1rem; align-items: center; }
@media (min-width: 700px) { .section-grid { grid-template-columns: 1fr 1fr; } }
.figure { width: 100%; height: auto; display: block; }
.figure text { font-family: inherit; }
.order-grid { display: grid; gap: 1.25rem; align-items: center; }
@media (min-width: 700px) { .order-grid { grid-template-columns: 1fr 1.5fr; } }
.stack { display: grid; gap: 10px; margin: 0; }
.stack .row { padding: 1.1rem 1.2rem; border-radius: 14px; font-weight: 700; font-size: 1.35rem; text-align: center; color: #fff; }
.stack .row.top { border-radius: 14px; }
.stack-caption { display: flex; justify-content: space-between; font-size: 0.9rem; font-weight: 600; color: var(--muted); margin: 0.4rem 0.2rem 0; }
.stack .row.plain { background: #4d5966; }
.stack .row.t3 { background: var(--t3); }
.stack .row.t3b { background: #4a7fc1; }
.stack .row.t4 { background: var(--t4); }
.stack .row.t5 { background: var(--t5); }
.stack .row.share { background: #e4e8ec; color: var(--ink); }
.stack .row small { display: block; font-weight: 500; font-size: 0.9rem; opacity: 0.95; }
.levels { padding-left: 1.2rem; margin: 0; }
.levels li { margin-bottom: 0.6rem; }
.points { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.points li { display: flex; gap: 0.9rem; align-items: flex-start; }
.points svg { width: 48px; height: 48px; flex: none; color: var(--t5); }
.closing { border-left: 8px solid var(--t1); }

/* Phone-only adjustments (below 500px) */
@media (max-width: 499px) {
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }
  .big-number { font-size: 2.2rem; }
  .beside { font-size: 1.1rem; }
  .sparkline { display: none; }
  .block { width: 72px; height: 48px; font-size: 0.7rem; }
  .blocks { gap: 5px; }
  .tier { padding: 0.9rem 0.9rem; }
  .tier-summary { display: grid; grid-template-columns: auto 1fr; gap: 0.25rem 1rem; padding: 0.5rem 0.8rem; }
  .tier-summary .label { white-space: nowrap; }
  .tier-summary .stat { min-width: 0; }
  .tier-summary .yield { font-size: 1.4rem; }
  .tier-summary .coupons { font-size: 0.95rem; white-space: normal; padding-top: 0.45rem; }
  .tier-desc { font-size: 1rem; margin-bottom: 0.6rem; }
  .explain-link a { display: block; margin-bottom: 0.3rem; }
  .explain-link br { display: none; }
  .tier-head .risk { font-size: 0.8rem; }
}