:root {
  --ink: #202327;
  --muted: #60666e;
  --line: #e1e4e8;
  --accent: #2458cc;
  --surface: #f6f7f9;
  --error: #ac3030;
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: #fff;
  font-synthesis: none;
  letter-spacing: 0;
  -webkit-text-size-adjust: 100%;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
a { color: var(--accent); text-underline-offset: 3px; }
button, input, select { font: inherit; }
button, summary, select, input[type="checkbox"], input[type="radio"] { cursor: pointer; }
button, a, summary, input, select { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
main:focus { outline: none; }
h1, h2, p { margin-top: 0; }
h1, h2, p, a, label { overflow-wrap: anywhere; }
p { line-height: 1.6; }
.icon { flex: 0 0 20px; vertical-align: middle; }
.site-header, main, .site-footer { width: min(1040px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: absolute; left: 16px; top: -100px; z-index: 20; background: #fff; padding: 12px; }
.skip-link:focus { top: 12px; }

.site-header { display: flex; align-items: center; justify-content: space-between; min-height: 88px; gap: 24px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; text-decoration: none; min-height: 44px; flex-shrink: 0; }
.brand img { display: block; width: 176px; height: auto; }
.site-nav { display: flex; gap: 20px; }
.site-nav a { display: flex; align-items: center; min-height: 44px; color: var(--muted); font-size: 14px; font-weight: 600; text-decoration: none; border-bottom: 2px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current] { color: var(--accent); border-bottom-color: currentColor; }
.mobile-menu { display: none; position: relative; }
.mobile-menu summary { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 8px; font-size: 14px; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
.mobile-menu[open] summary { color: var(--accent); }
.mobile-menu .site-nav { position: absolute; z-index: 10; right: 0; top: calc(100% + 6px); width: 248px; max-width: calc(100vw - 32px); display: grid; gap: 0; border: 1px solid var(--line); border-radius: 6px; padding: 8px; background: #fff; box-shadow: 0 12px 28px #2023271a; }
.mobile-menu .site-nav a { min-height: 48px; padding-inline: 12px; font-size: 16px; border: 0; border-radius: 4px; }
.mobile-menu .site-nav a:hover, .mobile-menu .site-nav a[aria-current] { background: #edf2ff; }

.page-heading { padding-top: 40px; margin-bottom: 28px; }
.page-heading h1 { margin-bottom: 10px; font-size: 32px; line-height: 1.2; font-weight: 730; }
.page-heading p { color: var(--muted); margin-bottom: 0; }
.directory { max-width: 760px; margin-inline: auto; }
.directory .page-heading { padding-top: 52px; }
.calculator-list { border-top: 1px solid var(--line); }
.calculator-link { display: flex; align-items: center; gap: 18px; padding: 22px 8px; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink); }
.calculator-link:hover { background: var(--surface); }
.calculator-icon { display: grid; place-items: center; width: 44px; height: 44px; flex: 0 0 44px; border-radius: 8px; }
.calculator-icon .icon { width: 24px; height: 24px; }
.icon-bmi { color: #2458cc; background: #edf2ff; }
.icon-bodyFat { color: #167261; background: #eaf6f1; }
.icon-tdee { color: #a0412c; background: #fcf0e9; }
.icon-targetWeight { color: #795820; background: #fbf5df; }
.icon-timeline { color: #67519b; background: #f1edf8; }
.calculator-link-copy { flex: 1; min-width: 0; }
.calculator-link h2 { margin: 0 0 5px; font-size: 18px; line-height: 1.3; font-weight: 650; }
.calculator-link p { margin: 0; font-size: 14px; line-height: 1.4; color: var(--muted); }
.calculator-link > .icon { color: var(--muted); }
.privacy-note { display: flex; align-items: center; gap: 8px; margin: 22px 0 0; font-size: 13px; color: var(--muted); }
.privacy-note .icon { color: #167261; }

.calculator-page { padding-bottom: 12px; }
.calculator-workspace { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: start; }
.calculator-form { min-width: 0; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 16px; align-items: start; }
.field { display: grid; gap: 7px; min-width: 0; }
.field-wide { grid-column: 1 / -1; }
.field > label, .field > legend { font-size: 14px; line-height: 1.4; font-weight: 600; min-height: 20px; }
.radio-field { display: block; border: 0; padding: 0; margin: 0; }
.radio-field legend { padding: 0; margin-bottom: 7px; }
.radio-options { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.radio-option { display: inline-flex; align-items: center; gap: 8px; min-height: 48px; cursor: pointer; }
.radio-option input { width: 20px; height: 20px; flex: 0 0 20px; margin: 0; accent-color: var(--accent); }
.radio-field .field-error { display: block; margin-top: 7px; }
.input-wrap { display: flex; align-items: center; border: 1px solid #acb3bd; border-radius: 6px; background: #fff; overflow: hidden; }
.input-wrap input, .input-wrap select { width: 100%; min-width: 0; border: 0; border-radius: 0; background: transparent; color: var(--ink); min-height: 48px; padding: 10px 12px; font-size: 18px; }
.input-wrap input { font-variant-numeric: tabular-nums; }
.input-wrap span { color: var(--muted); padding-right: 12px; font-size: 14px; }
.select-wrap { position: relative; }
.select-wrap select { -webkit-appearance: none; appearance: none; padding-right: 44px; }
.select-wrap > .icon { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.input-wrap:focus-within { outline: 3px solid #2458cc28; border-color: var(--accent); }
.input-wrap input:focus, .input-wrap select:focus { outline: none; }
.field:has([aria-invalid="true"]) .input-wrap { border-color: var(--error); }
.field small { font-size: 13px; line-height: 1.45; color: var(--muted); }
.field .field-error { color: var(--error); }
.field-help { margin-top: 18px; font-size: 14px; }
.field-help summary { min-height: 44px; display: flex; align-items: center; color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.field-help p { color: var(--muted); margin-bottom: 0; }
.field-help-link { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; margin-top: 8px; font-size: 14px; }
.form-actions { display: flex; gap: 10px; margin-top: 24px; }
.button, .icon-button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; border: 1px solid transparent; border-radius: 6px; padding: 10px 22px; font-weight: 650; }
.button-primary { color: #fff; background: var(--accent); min-width: 148px; flex: 1; }
.button-primary:hover { background: #1946a9; }
.icon-button { width: 48px; flex: 0 0 48px; padding: 0; color: var(--muted); background: #fff; border-color: var(--line); }
.icon-button:hover { color: var(--ink); background: var(--surface); }
.remember-control { display: flex; align-items: center; gap: 10px; min-height: 48px; margin-top: 8px; color: var(--muted); font-size: 14px; cursor: pointer; }
.remember-control input { flex: 0 0 18px; width: 18px; height: 18px; margin: 0; accent-color: var(--accent); }
.inline-status { color: var(--muted); font-size: 13px; margin: 0; }
.inline-status:empty { display: none; }

.result-box { background: var(--surface); padding: 28px; border-radius: 8px; min-width: 0; scroll-margin-top: 20px; }
.result-box h2 { font-size: 14px; font-weight: 650; color: var(--muted); margin-bottom: 20px; }
.result-box p { font-size: 14px; color: var(--muted); margin: 16px 0 0; }
.result-box .empty-result { margin: 0; min-height: 90px; }
.result-main { display: block; font-size: 42px; font-weight: 700; line-height: 1.15; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.result-main small { font-size: 18px; font-weight: 500; color: var(--muted); }
.result-label { display: block; font-size: 14px; color: var(--muted); margin: 0 0 8px; }
.result-metrics { margin: 24px 0 0; }
.result-metrics > div { display: flex; align-items: baseline; flex-wrap: wrap; justify-content: space-between; gap: 6px 12px; padding: 12px 0; border-top: 1px solid #d9dee5; }
.result-metrics dt { font-size: 14px; color: var(--muted); }
.result-metrics dd { margin: 0; font-size: 16px; font-weight: 650; font-variant-numeric: tabular-nums; }
.result-box .notice, .notice { color: var(--error); }
.result-box[data-state="invalid"] { border-left: 3px solid var(--error); }
.calculation-details { margin-top: 32px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
.calculation-details summary { min-height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 16px; list-style: none; font-weight: 600; color: var(--ink); }
.calculation-details[open] summary .icon { transform: rotate(180deg); }
.calculation-details summary h2 { font-size: 14px; font-weight: 600; margin: 0; }
.calculation-details p { max-width: 720px; margin-bottom: 12px; }
.calculation-details > a { display: inline-flex; align-items: center; min-height: 44px; }

.calculator-guide { max-width: 720px; padding-top: 32px; scroll-margin-top: 20px; }
.calculator-guide h2 { font-size: 20px; line-height: 1.35; margin-bottom: 12px; }
.calculator-guide p { color: var(--muted); font-size: 14px; margin-bottom: 12px; }
.calculator-guide .source-links, .source-links { font-size: 13px; line-height: 1.7; }
.related-calculators { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; border-top: 1px solid var(--line); margin-top: 16px; padding-top: 16px; }
.related-calculators a { display: grid; grid-template-columns: minmax(0, 1fr) 20px; align-items: center; gap: 6px 12px; min-height: 64px; text-decoration: none; font-size: 14px; }
.related-calculators a span { text-decoration: underline; text-underline-offset: 3px; }
.related-calculators small { grid-column: 1 / -1; color: var(--muted); font-size: 13px; line-height: 1.5; }
.content-date { color: var(--muted); font-size: 12px; margin: 24px 0 0; }
.source-calculator-link { display: inline-flex; align-items: center; min-height: 44px; gap: 8px; font-size: 14px; }

.text-page { max-width: 720px; margin-inline: auto; }
.text-page h2 { font-size: 20px; line-height: 1.3; margin: 32px 0 12px; }
.text-page p { color: var(--muted); }
.text-page section { scroll-margin-top: 20px; }
.site-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; border-top: 1px solid var(--line); margin-top: 48px; padding: 16px 0 24px; font-size: 13px; color: var(--muted); }
.site-footer p { margin: 0; }
.site-footer nav { display: flex; gap: 24px; }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; color: inherit; }
.footer-meta a { min-height: 32px; }

@media (max-width: 900px) {
  .desktop-nav { display: none; }
  .mobile-menu { display: block; }
  .calculator-workspace { gap: 28px; }
}

@media (max-width: 700px) {
  .site-header, main, .site-footer { width: calc(100% - 32px); }
  .site-header { min-height: 68px; gap: 12px; }
  .brand img { width: 156px; }
  .page-heading, .directory .page-heading { padding-top: 24px; margin-bottom: 24px; }
  .page-heading h1 { font-size: 26px; line-height: 1.25; }
  .page-heading p { font-size: 14px; }
  .calculator-link { padding: 18px 0; gap: 12px; }
  .calculator-link h2 { font-size: 17px; }
  .calculator-link p { font-size: 13px; }
  .calculator-icon { width: 40px; height: 40px; flex-basis: 40px; }
  .privacy-note { font-size: 12px; margin-top: 18px; }
  .calculator-workspace { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .result-box { padding: 22px; }
  .result-box .empty-result { min-height: 0; }
  .result-main { font-size: 38px; }
  .calculation-details { margin-top: 24px; }
  .related-calculators { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .site-footer { margin-top: 32px; gap: 0; }
  .footer-meta { flex-basis: 100%; }
}

@media (max-width: 359px) {
  .page-heading h1 { font-size: 24px; }
  .form-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
}