:root {
  --paper: #f6f3ec;
  --ink: #181614;
  --ink-soft: #6d655b;
  --line: #ddd5c7;
  --accent: #bb3b24;
  --accent-soft: #f0d9d1;
  --serif: "Fraunces", ui-serif, Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --max: 640px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-optical-sizing: auto;
  line-height: 1.5;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 2.5rem) clamp(1.1rem, 5vw, 2rem) 5rem;
}

/* --- masthead --- */
.masthead { margin-bottom: 1.75rem; }
.kicker {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.7rem;
  color: var(--accent);
  margin: 0 0 0.6rem;
}
.masthead h1 {
  font-weight: 500;
  font-size: clamp(2.1rem, 9vw, 3.2rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 0.7rem;
}
.masthead h1 em { font-style: italic; color: var(--accent); }
.dek {
  color: var(--ink-soft);
  font-size: 1rem;
  margin: 0;
  max-width: 38ch;
}

/* --- result --- */
.result {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
  padding: 1.4rem 0 1.5rem;
  margin-bottom: 2rem;
}
.result__lede { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; }
.result__pct {
  font-family: var(--mono);
  font-weight: 500;
  font-size: clamp(3rem, 16vw, 5.5rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}
.result__unit { font-size: 1.05rem; color: var(--ink-soft); }
.result__count {
  font-size: 1.35rem;
  margin: 0.7rem 0 0;
  font-weight: 500;
}
.result__count b { color: var(--accent); font-weight: 600; }
.result__both {
  font-family: var(--mono);
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0.5rem 0 0;
}
.result__denom {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0.35rem 0 0;
  font-style: italic;
}

/* --- controls --- */
.controls { display: flex; flex-direction: column; gap: 1.6rem; }
.field { display: flex; flex-direction: column; gap: 0.55rem; }
.field__label, .field label {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.72rem;
  color: var(--ink-soft);
}
.slider-head { display: flex; justify-content: space-between; align-items: baseline; }
.slider-val {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.hint { font-size: 0.82rem; color: var(--ink-soft); margin: 0.2rem 0 0; }

/* select */
.select-wrap { position: relative; }
.select-wrap::after {
  content: "▾";
  position: absolute; right: 0.9rem; top: 50%; transform: translateY(-50%);
  pointer-events: none; color: var(--accent); font-size: 0.85rem;
}
select {
  appearance: none; -webkit-appearance: none;
  width: 100%;
  font-family: var(--serif);
  font-size: 1.15rem;
  padding: 0.7rem 2.2rem 0.7rem 0.9rem;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ink);
}
select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

/* segmented */
.segmented { display: inline-flex; border: 1px solid var(--ink); border-radius: 2px; overflow: hidden; align-self: flex-start; }
.segmented button {
  font-family: var(--mono);
  font-size: 0.95rem;
  padding: 0.55rem 1.4rem;
  background: transparent; border: 0; color: var(--ink); cursor: pointer;
  min-height: 44px;
}
.segmented button + button { border-left: 1px solid var(--ink); }
.segmented button.is-active { background: var(--ink); color: var(--paper); }
.segmented--sm button { padding: 0.4rem 0.95rem; font-size: 0.82rem; min-height: 38px; }
.segmented--sm { border-color: var(--line); }
.segmented--sm button + button { border-left: 1px solid var(--line); }
.segmented--sm button.is-active { background: var(--accent); color: #fff; }

/* range sliders */
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 44px; background: transparent; cursor: pointer; margin: 0;
}
input[type="range"]::-webkit-slider-runnable-track { height: 2px; background: var(--line); }
input[type="range"]::-moz-range-track { height: 2px; background: var(--line); }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 22px; height: 22px; border-radius: 50%; background: var(--accent);
  margin-top: -10px; border: 3px solid var(--paper); box-shadow: 0 0 0 1px var(--accent);
}
input[type="range"]::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%; background: var(--accent);
  border: 3px solid var(--paper); box-shadow: 0 0 0 1px var(--accent);
}
input[type="range"]:focus-visible { outline: none; }
input[type="range"]:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 2px var(--ink); }
.dual { display: flex; flex-direction: column; gap: 0.1rem; }

.income-mode { display: flex; align-items: center; justify-content: space-between; margin-top: 0.7rem; }
.income-mode__label { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-soft); }

/* toggles / chips */
.toggles { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span {
  display: inline-flex; align-items: center; min-height: 44px;
  padding: 0.45rem 0.95rem;
  border: 1px solid var(--line); border-radius: 999px;
  font-size: 0.95rem; cursor: pointer; user-select: none;
  transition: background .12s, border-color .12s, color .12s;
}
.chip input:checked + span { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip input:focus-visible + span { outline: 2px solid var(--ink); outline-offset: 2px; }

/* rough section */
.rough { margin-top: -0.4rem; }
.rough summary {
  cursor: pointer; font-family: var(--mono); font-size: 0.8rem;
  color: var(--ink-soft); list-style: none; display: flex; align-items: center; gap: 0.6rem;
  min-height: 44px;
}
.rough summary::-webkit-details-marker { display: none; }
.rough summary::before { content: "+"; color: var(--accent); font-size: 1rem; }
.rough[open] summary::before { content: "–"; }
.rough > .toggles { margin-top: 0.9rem; }
.badge {
  font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.08em;
  padding: 0.15rem 0.5rem; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft);
}

/* breakdown */
.breakdown { margin-top: 2.4rem; border-top: 1px solid var(--line); padding-top: 1.4rem; }
.breakdown h2 {
  font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.12em;
  font-size: 0.74rem; color: var(--ink-soft); font-weight: 500; margin: 0 0 1rem;
}
.funnel { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.55rem; }
.funnel li { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 0.5rem 0.8rem; }
.funnel .fn-label { font-size: 0.95rem; }
.funnel .fn-rate { font-family: var(--mono); font-size: 0.9rem; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.funnel .fn-bar { grid-column: 1 / -1; height: 3px; background: var(--accent-soft); }
.funnel .fn-bar > i { display: block; height: 100%; background: var(--accent); }

/* method */
.method { margin-top: 2.6rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.method summary {
  cursor: pointer; font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--ink-soft);
  min-height: 44px; display: flex; align-items: center;
}
.method__body { color: var(--ink-soft); font-size: 0.92rem; margin-top: 0.8rem; }
.method__body p { margin: 0 0 0.8rem; }
.method__body code { font-family: var(--mono); font-size: 0.85em; }
.method__disclaimer { font-style: italic; color: var(--ink); }

@media (min-width: 720px) {
  .result__lede { gap: 0.9rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}