:root {
  --desk: #DCE3E9;
  --paper: #FFFFFF;
  --ink: #15233A;
  --ink-soft: #4C5C72;
  --rule: #C2CCD7;
  --rule-soft: #E3E8EE;
  --field: #F4F7FA;
  --field-line: #7D8DA0;
  --focus: #1D5AD0;
  --gain: #0E7246;
  --gain-bg: #E6F3EC;
  --loss: #AF2D23;
  --loss-bg: #FBEAE8;
  --even: #785A00;
  --even-bg: #F6EFD9;
  --lift: rgba(21, 35, 58, 0.14);
  color-scheme: light;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --desk: #0D1621;
    --paper: #172435;
    --ink: #E3EAF2;
    --ink-soft: #9EAEC1;
    --rule: #2F4056;
    --rule-soft: #22324A;
    --field: #111E2E;
    --field-line: #5A7090;
    --focus: #88B5FF;
    --gain: #4FD39B;
    --gain-bg: rgba(79, 211, 155, 0.12);
    --loss: #FF8D82;
    --loss-bg: rgba(255, 141, 130, 0.12);
    --even: #E8C660;
    --even-bg: rgba(232, 198, 96, 0.12);
    --lift: rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --desk: #0D1621;
  --paper: #172435;
  --ink: #E3EAF2;
  --ink-soft: #9EAEC1;
  --rule: #2F4056;
  --rule-soft: #22324A;
  --field: #111E2E;
  --field-line: #5A7090;
  --focus: #88B5FF;
  --gain: #4FD39B;
  --gain-bg: rgba(79, 211, 155, 0.12);
  --loss: #FF8D82;
  --loss-bg: rgba(255, 141, 130, 0.12);
  --even: #E8C660;
  --even-bg: rgba(232, 198, 96, 0.12);
  --lift: rgba(0, 0, 0, 0.5);
  color-scheme: dark;
}

html { scroll-padding-top: env(safe-area-inset-top, 0px); background: var(--desk); }
*, *::before, *::after { box-sizing: inherit; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--desk);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: env(safe-area-inset-top, 0px);
  z-index: 10;
  background: var(--desk);
}

.page { max-width: 1120px; margin: 0 auto; padding: 36px 20px 128px; }
@media (min-width: 900px) { .page { padding: 56px 40px 88px; } }

/* Intro */
.intro h1 {
  margin: 0 0 12px;
  max-width: 22ch;
  font-size: clamp(1.9rem, 1.35rem + 2.2vw, 2.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
.intro p { margin: 0; max-width: 58ch; font-size: 1.0625rem; color: var(--ink-soft); }

/* Layout */
.layout {
  display: grid;
  gap: 40px;
  margin-top: 36px;
  grid-template-areas: "form" "receipt" "tools";
}
.inputs { grid-area: form; min-width: 0; }
.receipt-col { grid-area: receipt; min-width: 0; }
.tools { grid-area: tools; min-width: 0; display: grid; gap: 44px; align-content: start; }
@media (min-width: 900px) {
  .layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 440px);
    grid-template-areas: "form receipt" "tools receipt";
    column-gap: 56px;
    row-gap: 48px;
  }
}
@media (min-width: 900px) and (min-height: 840px) {
  .receipt-col { position: sticky; top: calc(24px + env(safe-area-inset-top, 0px)); align-self: start; }
}

/* Form */
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
fieldset + fieldset { margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--rule); }
legend {
  float: left;
  width: 100%;
  padding: 0;
  margin: 0 0 14px;
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.3;
}
legend + * { clear: both; }

.grid2 { display: grid; gap: 0 18px; }
@media (min-width: 560px) { .grid2 { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }

.field { margin: 0 0 18px; min-width: 0; }
.field > label, .label { display: block; margin: 0 0 6px; font-weight: 600; font-size: 0.9375rem; }
.control { position: relative; }
.control input {
  width: 100%;
  min-height: 48px;
  padding: 11px 58px 11px 14px;
  font: inherit;
  font-size: 1.0625rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  background: var(--field);
  border: 1.5px solid var(--field-line);
  border-radius: 10px;
  -webkit-appearance: none;
  appearance: none;
}
.control.plain input { padding-right: 14px; }
.control input::placeholder { color: var(--ink-soft); opacity: 0.75; }
.control input:focus { outline: 3px solid var(--focus); outline-offset: 2px; }
.control input.is-invalid { border-color: var(--loss); }
.control .unit {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 600;
  color: var(--ink-soft);
  pointer-events: none;
}
.hint { margin: 6px 0 0; font-size: 0.875rem; color: var(--ink-soft); }
.error { margin: 6px 0 0; font-size: 0.875rem; font-weight: 600; color: var(--loss); }

.seg {
  display: inline-flex;
  margin-top: 10px;
  background: var(--field);
  border: 1.5px solid var(--field-line);
  border-radius: 10px;
  overflow: hidden;
}
.seg.flush { margin-top: 0; }
.seg input { position: absolute; opacity: 0; width: 1px; height: 1px; pointer-events: none; }
.seg label {
  display: flex;
  align-items: center;
  padding: 8px 15px;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}
.seg label + input + label { border-left: 1.5px solid var(--field-line); }
.seg input:checked + label { background: var(--ink); color: var(--paper); }
.seg input:focus-visible + label { outline: 3px solid var(--focus); outline-offset: -4px; }

.check { display: flex; gap: 12px; align-items: flex-start; }
.check input { flex: none; width: 22px; height: 22px; margin: 1px 0 0; accent-color: var(--ink); }
.check label { display: block; font-weight: 600; font-size: 0.9375rem; cursor: pointer; }
.check .hint { margin-top: 2px; }

details summary {
  width: fit-content;
  padding: 6px 0;
  font-weight: 600;
  cursor: pointer;
}
details summary:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
.assume-body { padding: 10px 0 0; }
.radios { display: grid; gap: 10px; margin: 0 0 18px; }
.radios label { display: flex; gap: 10px; align-items: flex-start; font-size: 0.9375rem; cursor: pointer; }
.radios input { flex: none; width: 20px; height: 20px; margin: 1px 0 0; accent-color: var(--ink); }
.narrow { max-width: 180px; }

.linkish {
  padding: 6px 0;
  font: inherit;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--ink-soft);
  background: none;
  border: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.linkish.inline { padding: 0; font-size: inherit; color: var(--ink); }
.linkish:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }

/* Breakdown panel */
.panel {
  padding: 20px 22px 18px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 14px;
  box-shadow: 0 10px 28px -20px var(--lift);
}
.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 12px;
  margin-bottom: 8px;
}
.panel h2 { margin: 0; min-width: 0; font-size: 1.125rem; font-weight: 700; line-height: 1.3; overflow-wrap: anywhere; }
.panel .meta { margin: 0; font-size: 0.8125rem; color: var(--ink-soft); }

.row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid var(--rule-soft);
}
.rows > .row:first-child { border-top: 0; }
.row .name { min-width: 0; font-size: 0.96875rem; }
.basis {
  display: block;
  margin-top: 1px;
  font-size: 0.8125rem;
  line-height: 1.4;
  color: var(--ink-soft);
}
.row .amt {
  flex: none;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.row.lead .name, .row.lead .amt { font-weight: 700; }
.row.sum { margin-top: 2px; border-top: 1.5px solid var(--ink); }
.row.sum .name, .row.sum .amt { font-weight: 700; }

.net {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 8px;
  padding: 12px 14px;
  border-radius: 10px;
}
.net .name { font-weight: 700; font-size: 1.0625rem; }
.net .amt {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.net.gain { background: var(--gain-bg); color: var(--gain); }
.net.loss { background: var(--loss-bg); color: var(--loss); }
.net.even { background: var(--even-bg); color: var(--even); }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 12px 0 2px; }
.stat .k { font-size: 0.8125rem; color: var(--ink-soft); }
.stat .v { font-weight: 650; font-variant-numeric: tabular-nums; }
.stat .v.loss { color: var(--loss); }

.payout { margin-top: 14px; border-top: 1px solid var(--rule); }
.payout .row { border-top: 0; padding-bottom: 4px; }
.note { margin: 0; font-size: 0.8125rem; line-height: 1.45; color: var(--ink-soft); }
.empty { margin: 4px 0 2px; color: var(--ink-soft); }

.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}
.panel-actions .btn { flex: 1 1 140px; margin-top: 0; }
.status { margin: 8px 0 0; min-height: 1.25em; font-size: 0.875rem; color: var(--ink-soft); }
.share-fallback { margin-top: 10px; }
.share-fallback textarea {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--ink);
  background: var(--field);
  border: 1.5px solid var(--field-line);
  border-radius: 10px;
  resize: vertical;
}
.share-fallback textarea:focus { outline: 3px solid var(--focus); outline-offset: 2px; }

/* Buttons */
.btn {
  min-height: 44px;
  margin-top: 10px;
  padding: 10px 16px;
  font: inherit;
  font-weight: 650;
  font-size: 0.9375rem;
  color: var(--paper);
  background: var(--ink);
  border: 1.5px solid var(--ink);
  border-radius: 10px;
  cursor: pointer;
}
.btn.ghost { color: var(--ink); background: transparent; border-color: var(--field-line); }
.btn:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.mini {
  min-height: 40px;
  padding: 6px 14px;
  font: inherit;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--ink);
  background: transparent;
  border: 1.5px solid var(--field-line);
  border-radius: 8px;
  cursor: pointer;
}
.mini:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

/* Tool sections under the form */
.block h2 { margin: 0 0 12px; font-size: 1.125rem; font-weight: 700; line-height: 1.3; }
.block h2 .count { font-weight: 500; color: var(--ink-soft); }

.price-row { padding: 14px 0; border-top: 1px solid var(--rule); }
.price-row:last-of-type { border-bottom: 1px solid var(--rule); }
.price-row .k { display: block; font-weight: 600; font-size: 0.9375rem; }
.price-row .v {
  margin-top: 2px;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
  font-variant-numeric: tabular-nums;
}
.target-line { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 6px; }
.target-line .k { margin: 0; }
.target-line .control { width: 112px; }
.target-line .control input { min-height: 42px; padding: 8px 34px 8px 12px; }

.disc-line { display: flex; gap: 10px; align-items: stretch; }
.disc-line .control { flex: 1; min-width: 0; }
.disc-line .seg { flex: none; }

table.cmp { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.cmp th, .cmp td { padding: 9px 0; text-align: right; border-top: 1px solid var(--rule); vertical-align: baseline; }
.cmp th + th, .cmp td + td { padding-left: 14px; }
.cmp th:first-child, .cmp td:first-child { text-align: left; }
.cmp thead th { padding-top: 0; border-top: 0; font-size: 0.8125rem; font-weight: 600; color: var(--ink-soft); }
.cmp td { font-weight: 600; white-space: nowrap; }
.cmp td:first-child { font-weight: 400; white-space: normal; }
.cmp tbody tr:last-child td { border-bottom: 1px solid var(--rule); }
.cmp .loss { color: var(--loss); }

.callout { margin-top: 14px; padding: 12px 14px; border-radius: 10px; font-size: 0.9375rem; line-height: 1.5; }
.callout.even { background: var(--even-bg); }
.callout.loss { background: var(--loss-bg); }
.callout.gain { background: var(--gain-bg); }
.callout + .note { margin-top: 10px; }

.saved-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 16px;
  align-items: baseline;
  padding: 12px 0;
  border-top: 1px solid var(--rule);
}
.saved-row:last-child { border-bottom: 1px solid var(--rule); }
.saved-name { font-weight: 650; overflow-wrap: anywhere; }
.saved-amt { font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }
.saved-amt.gain { color: var(--gain); }
.saved-amt.loss { color: var(--loss); }
.saved-actions { grid-column: 1 / -1; display: flex; gap: 8px; margin-top: 8px; }

details.how ul { margin: 8px 0 0; padding-left: 20px; max-width: 62ch; font-size: 0.9375rem; color: var(--ink-soft); }
details.how li + li { margin-top: 6px; }

.foot {
  margin-top: 48px;
  padding-top: 20px;
  max-width: 70ch;
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
  color: var(--ink-soft);
}
.foot p { margin: 0; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.chip {
  min-height: 36px;
  padding: 5px 12px;
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--field-line);
  border-radius: 999px;
  cursor: pointer;
}
.chip[aria-pressed="true"] { color: var(--paper); background: var(--ink); border-color: var(--ink); }
.chip:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.checked { margin: 10px 0 0; font-size: 0.875rem; color: var(--ink-soft); }

.waitlist p { margin: 0 0 12px; max-width: 60ch; }
.waitlist .btn { display: inline-flex; align-items: center; margin-top: 0; text-decoration: none; }
.waitlist .note { margin: 10px 0 0; }

.faq { margin-top: 56px; max-width: 760px; }
.faq h2 { margin: 0 0 8px; font-size: 1.375rem; font-weight: 700; line-height: 1.3; }
.faq details { border-top: 1px solid var(--rule); }
.faq details:last-of-type { border-bottom: 1px solid var(--rule); }
.faq summary { width: 100%; padding: 14px 0; font-size: 1rem; }
.faq details p { margin: 0 0 16px; max-width: 66ch; color: var(--ink-soft); }
.foot p + p { margin-top: 8px; }
.foot a { color: var(--ink); text-underline-offset: 3px; }

/* Phone: keeps the result in view while typing */
.bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 20px calc(10px + env(safe-area-inset-bottom, 0px));
  background: var(--paper);
  border-top: 1px solid var(--rule);
  box-shadow: 0 -8px 20px -14px var(--lift);
  transition: transform 200ms ease;
}
.bar.is-hidden { transform: translateY(110%); }
.bar-k { font-size: 0.8125rem; color: var(--ink-soft); }
.bar-v { font-size: 1.375rem; font-weight: 700; line-height: 1.2; font-variant-numeric: tabular-nums; }
.bar-v.gain { color: var(--gain); }
.bar-v.loss { color: var(--loss); }
.bar-v.even { color: var(--even); }
.bar button {
  flex: none;
  min-height: 44px;
  padding: 9px 14px;
  font: inherit;
  font-weight: 650;
  font-size: 0.9375rem;
  color: var(--ink);
  background: transparent;
  border: 1.5px solid var(--field-line);
  border-radius: 10px;
  cursor: pointer;
}
.bar button:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
@media (min-width: 900px) { .bar { display: none; } }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  .bar { transition: none; }
}

/* ---------- Shared header and navigation ---------- */
.topbar { border-bottom: 1px solid var(--rule); }
.topbar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 20px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 12px 20px;
}
@media (min-width: 900px) { .topbar-inner { padding: 14px 40px; } }
.brand {
  font-weight: 800;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
.nav {
  display: flex;
  gap: 2px;
  width: 100%;
  margin: 0 -10px;
  padding: 2px 0;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.nav::-webkit-scrollbar { display: none; }
@media (min-width: 900px) { .nav { width: auto; margin: 0 -10px 0 auto; } }
.nav a {
  flex: none;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  white-space: nowrap;
  color: var(--ink-soft);
  text-decoration: none;
}
.nav a:hover { color: var(--ink); background: var(--rule-soft); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--paper); box-shadow: inset 0 0 0 1px var(--rule); }
.brand:focus-visible, .nav a:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 6px; }

/* ---------- Tool pages ---------- */
.tool { display: grid; gap: 32px; margin-top: 32px; }
@media (min-width: 900px) {
  .tool { grid-template-columns: minmax(0, 1fr) minmax(0, 430px); gap: 56px; align-items: start; }
}
.big {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.big.gain { color: var(--gain); }
.big.loss { color: var(--loss); }
.result-k { font-size: 0.875rem; font-weight: 600; color: var(--ink-soft); }
.result-block + .result-block { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--rule-soft); }
.result-v { font-size: 1.375rem; font-weight: 700; line-height: 1.3; font-variant-numeric: tabular-nums; }
a.btn { display: inline-flex; align-items: center; text-decoration: none; }
.cross { margin-top: 16px; }
.cross .btn { margin-top: 0; }

/* ---------- Article text ---------- */
.prose { max-width: 68ch; margin-top: 56px; }
.prose h2 { margin: 40px 0 10px; font-size: 1.25rem; font-weight: 700; line-height: 1.3; }
.prose h2:first-child { margin-top: 0; }
.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; }
.prose li + li { margin-top: 6px; }
.prose a { color: var(--ink); text-underline-offset: 3px; }
.formula {
  margin: 0 0 16px;
  padding: 12px 14px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 10px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.table-wrap { overflow-x: auto; margin: 0 0 16px; }
.updated { font-size: 0.875rem; color: var(--ink-soft); }
.sources { font-size: 0.875rem; color: var(--ink-soft); }
.sources a { color: var(--ink-soft); }

/* ---------- Shared footer ---------- */
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0 0 14px; }
.foot-links a { color: var(--ink-soft); font-weight: 600; text-decoration: none; }
.foot-links a:hover { color: var(--ink); text-decoration: underline; }