/* The blog and its calculators. Same tokens and type as index.html - paper,
   ink, the green accent, Source Serif for display and Inter for everything
   read at length - so a page reached from a WhatsApp card is visibly the
   same product as the homepage. The macro colours are the ones the WhatsApp
   cards use (app/services/cards.py in the bud repo), so the result panel and
   the card a user already has agree at a glance. */
:root {
  --paper: #f7f1e7;
  --ink: #171310;
  --body: rgba(23, 19, 16, 0.84);
  --muted: rgba(23, 19, 16, 0.66);
  --faint: rgba(23, 19, 16, 0.5);
  --line: rgba(23, 19, 16, 0.14);
  --accent: #1f6f5c;
  --accent-soft: rgba(31, 111, 92, 0.1);
  --cream: #ece4d6;
  --card: #fbf8f2;
  --protein: #1f7a4d;
  --carbs: #c9862b;
  --fat: #b4553c;
  --fibre: #4a7fa5;
  --healthy: #1f7a4d;
  --caution: #c9862b;
  --warn: #b4553c;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, serif;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); }
img, svg { max-width: 100%; }

.wrap {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(24px, 5vw, 48px) clamp(20px, 5vw, 32px) 0;
  flex: 1;
}

/* ---- header ---- */
.top {
  display: flex;
  align-items: center;
  gap: 11px;
  padding-bottom: clamp(28px, 6vw, 48px);
}
.top a.home { display: flex; align-items: center; gap: 11px; color: var(--ink); text-decoration: none; }
.mark { width: 30px; height: 30px; flex: 0 0 auto; }
.brand { font-size: 20px; font-weight: 600; letter-spacing: 0.01em; }
.top nav { margin-left: auto; display: flex; gap: 18px; font: 500 14px/1.3 Inter, system-ui, sans-serif; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a:hover, .top nav a[aria-current="page"] { color: var(--accent); }

.crumbs { margin: 0 0 14px; font: 500 13px/1.4 Inter, system-ui, sans-serif; color: var(--faint); }
.crumbs a { color: var(--faint); text-decoration: none; }
.crumbs a:hover { color: var(--accent); }

/* ---- article head ---- */
.kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font: 600 12px/1.4 Inter, system-ui, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
h1 {
  margin: 0;
  font-size: clamp(36px, 7vw, 54px);
  line-height: 1.04;
  font-weight: 500;
  letter-spacing: -0.01em;
}
h1 em { color: var(--accent); font-style: italic; }
.dek {
  margin: 18px 0 0;
  max-width: 40ch;
  font-size: clamp(19px, 3vw, 22px);
  line-height: 1.38;
  font-style: italic;
  color: var(--body);
}
.byline {
  margin: 20px 0 0;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font: 500 13px/1.6 Inter, system-ui, sans-serif;
}
.byline b { color: var(--muted); font-weight: 600; }

/* ---- prose ---- */
.prose { font: 400 17px/1.72 Inter, system-ui, sans-serif; color: var(--body); }
.prose h2 {
  margin: clamp(44px, 8vw, 60px) 0 12px;
  color: var(--ink);
  font: 500 clamp(26px, 4.6vw, 32px)/1.15 "Source Serif 4", Georgia, serif;
  letter-spacing: -0.005em;
}
.prose h2 .step {
  display: block;
  margin-bottom: 6px;
  color: var(--accent);
  font: 600 12px/1.4 Inter, system-ui, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.prose h3 { margin: 28px 0 8px; color: var(--ink); font: 600 17px/1.4 Inter, system-ui, sans-serif; }
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose sup a, a.cite {
  color: var(--accent);
  font: 600 11px/1 Inter, system-ui, sans-serif;
  text-decoration: none;
  padding: 0 1px;
}
.prose sup a:hover { text-decoration: underline; }

.formula {
  margin: 18px 0 22px;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: var(--card);
  border-radius: 0 6px 6px 0;
  color: var(--ink);
  font: 500 16px/1.6 "Source Serif 4", Georgia, serif;
  overflow-x: auto;
}
.formula .eq { display: block; white-space: nowrap; }
.formula .eq + .eq { margin-top: 4px; }
.formula small { display: block; margin-top: 8px; color: var(--muted); font: 400 13px/1.5 Inter, system-ui, sans-serif; white-space: normal; }

.note {
  margin: 20px 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
  font: 400 15px/1.6 Inter, system-ui, sans-serif;
  color: var(--body);
}
.note b { color: var(--ink); }

/* ---- tables ---- */
.table-wrap { margin: 18px 0 24px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font: 400 15px/1.5 Inter, system-ui, sans-serif; }
th, td { text-align: left; vertical-align: top; padding: 11px 12px 11px 0; border-bottom: 1px solid var(--line); }
th {
  color: var(--faint);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom-color: rgba(23, 19, 16, 0.26);
}
td:last-child, th:last-child { padding-right: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.src { color: var(--muted); font-size: 14px; }
td b { color: var(--ink); font-weight: 600; }
.swatch { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 7px; vertical-align: 0; }

/* ---- the calculator ---- */
.calc {
  margin: clamp(28px, 6vw, 40px) 0 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  overflow: hidden;
}
.calc-head {
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.calc-head h2 { margin: 0; font: 500 22px/1.2 "Source Serif 4", Georgia, serif; }
.calc-head span { color: var(--faint); font: 500 12px/1.4 Inter, system-ui, sans-serif; }
.calc form { padding: 20px 22px 6px; font: 400 15px/1.4 Inter, system-ui, sans-serif; }
.fieldrow { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 16px; }
.field { margin: 0 0 16px; min-width: 0; border: 0; padding: 0; }
.field > label, .field > legend {
  display: block;
  margin: 0 0 7px;
  padding: 0;
  color: var(--ink);
  font: 600 13px/1.3 Inter, system-ui, sans-serif;
}
.field .hint { color: var(--faint); font-weight: 500; }
input[type="number"] {
  width: 100%;
  min-height: 46px;
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: 500 16px/1 Inter, system-ui, sans-serif;
  font-variant-numeric: tabular-nums;
  -moz-appearance: textfield;
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"]:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
input[aria-invalid="true"] { border-color: var(--warn); }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.unit-in { position: relative; }
.unit-in input { padding-right: 40px; }
.unit-in i {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--faint);
  font: 500 13px/1 Inter, system-ui, sans-serif;
  font-style: normal;
  pointer-events: none;
}

/* a label with a control on the same line (the height unit toggle), kept the
   same height as a plain label so the inputs in a row line up */
.label-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 30px; margin: 0 0 7px; }
.label-row > label, .label-row > span.lbl { margin: 0; color: var(--ink); font: 600 13px/1.3 Inter, system-ui, sans-serif; }

/* segmented controls - radios styled as one pill row */
.seg { display: inline-flex; width: 100%; border: 1px solid var(--line); border-radius: 8px; background: #fff; padding: 3px; gap: 3px; }
.seg label { flex: 1; position: relative; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span {
  display: block;
  padding: 9px 8px;
  border-radius: 6px;
  text-align: center;
  color: var(--muted);
  font: 600 14px/1.2 Inter, system-ui, sans-serif;
  cursor: pointer;
  user-select: none;
}
.seg input:checked + span { background: var(--accent); color: #fff; }
.seg input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.seg.mini { width: auto; padding: 2px; gap: 2px; border-radius: 7px; }
.seg.mini span { padding: 4px 10px; font-size: 12px; border-radius: 5px; white-space: nowrap; }

/* choice cards - activity (radio) and goals (checkbox) */
.choices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.choices.goals { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.choice { position: relative; }
.choice input { position: absolute; opacity: 0; pointer-events: none; }
.choice span {
  display: block;
  height: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  user-select: none;
}
.choice b { display: block; color: var(--ink); font: 600 14px/1.3 Inter, system-ui, sans-serif; }
.choice small { display: block; margin-top: 3px; color: var(--muted); font: 400 12.5px/1.4 Inter, system-ui, sans-serif; }
.choice input:checked + span { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); background: var(--accent-soft); }
.choice input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.choices.goals .choice span { padding: 10px 12px; }

.form-note { margin: 2px 0 18px; color: var(--faint); font: 400 12.5px/1.5 Inter, system-ui, sans-serif; }

/* results */
.result { border-top: 1px solid var(--line); padding: 22px; background: #fff; }
.result[hidden] { display: none; }
.result .label {
  margin: 0 0 6px;
  color: var(--accent);
  font: 600 12px/1.4 Inter, system-ui, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.headline { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.headline strong {
  font: 600 clamp(52px, 12vw, 72px)/1 "Source Serif 4", Georgia, serif;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.headline span { color: var(--muted); font: 500 16px/1.3 Inter, system-ui, sans-serif; }
.macros { margin: 18px 0 0; }
.macro { padding: 10px 0; border-bottom: 1px solid var(--line); font: 400 15px/1.4 Inter, system-ui, sans-serif; }
.macro:last-child { border-bottom: 0; }
.macro .row { display: flex; justify-content: space-between; gap: 12px; }
.macro .row b { color: var(--ink); font-weight: 600; }
.macro .row em { font-style: normal; font-weight: 700; font-variant-numeric: tabular-nums; }
.macro .bar { height: 7px; margin-top: 7px; border-radius: 4px; background: rgba(23, 19, 16, 0.07); overflow: hidden; }
.macro .bar i { display: block; height: 100%; border-radius: 4px; }
.macro small { display: block; margin-top: 5px; color: var(--faint); font-size: 12.5px; }

.working { margin: 20px 0 0; padding: 14px 16px; border-radius: 8px; background: var(--card); border: 1px solid var(--line); }
.working h3 { margin: 0 0 8px; font: 600 13px/1.3 Inter, system-ui, sans-serif; color: var(--ink); }
.working ol { margin: 0; padding-left: 20px; font: 400 14px/1.6 Inter, system-ui, sans-serif; color: var(--body); }
.working li { margin: 3px 0; }
.working li span { font-variant-numeric: tabular-nums; }

.bmi-line { margin: 16px 0 0; font: 400 15px/1.55 Inter, system-ui, sans-serif; color: var(--body); }
.bmi-line b { color: var(--ink); }

/* BMI scale */
.scale { position: relative; margin: 26px 0 8px; height: 40px; }
.scale .track { position: absolute; left: 0; right: 0; top: 16px; height: 12px; border-radius: 6px; overflow: hidden; display: flex; background: rgba(23, 19, 16, 0.07); }
.scale .track i { display: block; height: 100%; }
.scale .marker { position: absolute; top: 0; width: 0; height: 0; border-left: 8px solid transparent; border-right: 8px solid transparent; border-top: 12px solid var(--ink); transform: translateX(-8px); transition: left 0.2s ease; }
.scale .ticks { position: absolute; left: 0; right: 0; top: 30px; font: 500 11px/1 Inter, system-ui, sans-serif; color: var(--faint); }
.scale .ticks span { position: absolute; transform: translateX(-50%); top: 2px; }

.cta {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 18px 0 0;
  min-height: 48px;
  padding: 13px 22px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: 600 15px/1.2 Inter, system-ui, sans-serif;
  text-decoration: none;
  box-shadow: 0 8px 20px -12px rgba(31, 111, 92, 0.85);
}
.cta svg { width: 18px; height: 18px; flex: 0 0 auto; }
.cta:hover { opacity: 0.92; }
.cta-hint { margin: 10px 0 0; color: var(--faint); font: 400 13px/1.5 Inter, system-ui, sans-serif; }

.disclaimer { margin: 16px 0 0; color: var(--faint); font: 400 12.5px/1.6 Inter, system-ui, sans-serif; }

/* ---- FAQ ---- */
.faq details { border-bottom: 1px solid var(--line); padding: 14px 2px; }
.faq summary { cursor: pointer; list-style: none; color: var(--ink); font: 600 15.5px/1.5 Inter, system-ui, sans-serif; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; float: right; margin-left: 12px; color: var(--accent); font-weight: 600; }
.faq details[open] summary::after { content: '−'; }
.faq details p { margin: 10px 0 0; font: 400 15px/1.65 Inter, system-ui, sans-serif; color: var(--body); }

/* ---- references ---- */
.refs { margin: 0; padding-left: 26px; font: 400 14px/1.6 Inter, system-ui, sans-serif; color: var(--body); }
.refs li { margin: 0 0 10px; padding-left: 4px; scroll-margin-top: 24px; }
.refs li:target { background: var(--accent-soft); border-radius: 4px; }
.refs a { word-break: break-word; }
.refs .what { display: block; color: var(--faint); font-size: 13px; }

/* ---- blog index ---- */
.posts { margin: 8px 0 0; border-top: 1px solid var(--line); }
.post { display: block; padding: 22px 2px; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.post .kicker { margin-bottom: 8px; }
.post h2 { margin: 0; font: 500 clamp(24px, 4.5vw, 30px)/1.18 "Source Serif 4", Georgia, serif; }
.post p { margin: 10px 0 0; color: var(--muted); font: 400 15.5px/1.6 Inter, system-ui, sans-serif; }
.post .more { display: inline-block; margin-top: 12px; color: var(--accent); font: 600 14px/1.3 Inter, system-ui, sans-serif; }
.post:hover h2 { color: var(--accent); }

/* ---- footer ---- */
.spacer { min-height: 56px; }
footer {
  margin-top: 56px;
  border-top: 1px solid var(--line);
  padding: 22px clamp(20px, 5vw, 32px) 40px;
  color: var(--faint);
  font: 500 11px/1.7 Inter, system-ui, sans-serif;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: center;
}
footer a { text-decoration: none; color: var(--accent); }

@media (max-width: 560px) {
  .fieldrow { grid-template-columns: 1fr; gap: 0; }
  .choices { grid-template-columns: 1fr; }
  .choices.goals { grid-template-columns: 1fr 1fr; }
  .calc form, .result { padding-left: 16px; padding-right: 16px; }
  .calc-head { padding: 16px; }
  .top nav { gap: 14px; }
}

@media print {
  .calc form, .cta, .cta-hint, .top nav { display: none; }
  body { background: #fff; }
}