:root {
  --bg: #f6f8f7; --card: #fff; --ink: #1d2a26; --mute: #61716b; --line: #dbe3df;
  --acc: #1f8a70; --acc-2: #e7f4ef; --warn: #b7791f; --bad: #c0392b;
  --r: 12px; font-size: 17px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 1rem/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 0 16px 48px; }
a { color: var(--acc); }
.top { max-width: 760px; margin: 0 auto; padding: 14px 16px; }
.logo { font-weight: 700; font-size: 1.15rem; text-decoration: none; color: var(--ink); }
.logo small { font-weight: 400; color: var(--mute); }
.hero h1 { font-size: 1.7rem; line-height: 1.2; margin: 12px 0 8px; }
.lead { color: var(--mute); margin: 0 0 20px; }

.calc { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; }
.step { border: 0; padding: 0; margin: 0 0 16px; }
.step legend { font-weight: 600; margin-bottom: 8px; padding: 0; }
.js .hidden { display: none; }

.btn { display: inline-block; margin: 0 6px 6px 0; cursor: pointer; }
.btn input { position: absolute; opacity: 0; pointer-events: none; }
.btn span { display: inline-block; padding: 9px 14px; border: 1px solid var(--line); border-radius: 999px;
  background: #fff; transition: .12s; user-select: none; }
.btn:hover span { border-color: var(--acc); }
.btn input:checked + span { background: var(--acc); border-color: var(--acc); color: #fff; }
.btn input:focus-visible + span { outline: 2px solid var(--acc); outline-offset: 2px; }
.grid-age { display: flex; flex-wrap: wrap; }

.num { display: inline-flex; align-items: center; gap: 6px; margin: 0 12px 8px 0; }
.num input { width: 96px; padding: 9px 10px; font-size: 1.05rem; border: 1px solid var(--line); border-radius: 8px; }
.num input:focus { outline: 2px solid var(--acc); border-color: var(--acc); }
.num span { color: var(--mute); }
.hw__row { display: flex; align-items: center; gap: 4px 12px; flex-wrap: wrap; margin-bottom: 4px; }
.hw__row .num { margin-bottom: 0; min-width: 9.5rem; }
.range { display: none; flex: 1 1 220px; accent-color: var(--acc); height: 28px; margin: 0; }
.js .range { display: block; }
.more-fields { margin-top: 6px; }
.more-fields summary { cursor: pointer; color: var(--acc); margin-bottom: 8px; }
.chk { display: block; margin: 6px 0; }
.submit { padding: 10px 20px; border: 0; border-radius: 8px; background: var(--acc); color: #fff; font-size: 1rem; }

.card { border-top: 1px solid var(--line); padding-top: 16px; margin-top: 4px; }
.res__main { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.res__bmi span { display: block; font-size: .8rem; color: var(--mute); }
.res__bmi b { font-size: 2.6rem; line-height: 1; }
.res__cat { font-size: 1.25rem; font-weight: 600; }
.res--normal .res__cat { color: var(--acc); }
.res--over .res__cat, .res--mild_thin .res__cat, .res--risk_over .res__cat, .res--thin .res__cat { color: var(--warn); }
.res--ob1 .res__cat, .res--ob2 .res__cat, .res--ob3 .res__cat, .res--obese .res__cat,
.res--severe_thin .res__cat, .res--mod_thin .res__cat { color: var(--bad); }

.scale { position: relative; height: 10px; margin: 14px 0 26px; border-radius: 5px;
  background: linear-gradient(90deg, #e3b04b 0 14%, #3aa67f 14% 40%, #e3b04b 40% 60%, #e07b4c 60% 80%, #c0392b 80%); }
.scale i { position: absolute; top: -5px; width: 4px; height: 20px; margin-left: -2px; background: var(--ink); border-radius: 2px; }
.scale span { position: absolute; top: 14px; font-size: .75rem; color: var(--mute); transform: translateX(-50%); }
.scale span:nth-of-type(1) { left: 0; transform: none; } .scale span:nth-of-type(2) { left: 14%; }
.scale span:nth-of-type(3) { left: 40%; } .scale span:nth-of-type(4) { left: 60%; }
.scale span:nth-of-type(5) { left: 80%; } .scale span:nth-of-type(6) { left: 100%; transform: translateX(-100%); }

.note { background: var(--acc-2); border-radius: 8px; padding: 10px 12px; font-size: .95rem; }
.err { color: var(--bad); }
.plan { background: #fafcfb; border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; margin: 8px 0 12px; }
.plan h3 { margin: 0 0 8px; }
.plan dl { margin: 0; display: grid; grid-template-columns: 9.5rem 1fr; gap: 8px 12px; }
.plan dt { color: var(--mute); }
.plan dd { margin: 0; }
.plan small { display: block; color: var(--mute); font-size: .82rem; }
@media (max-width: 520px) { .plan dl { grid-template-columns: 1fr; } .plan dt { margin-top: 6px; } }
.more { font-weight: 600; }
.links { padding-left: 18px; }
.src { font-size: .82rem; color: var(--mute); margin-top: 10px; }
.src summary { cursor: pointer; }
.about { margin-top: 28px; }
.foot { max-width: 760px; margin: 0 auto; padding: 16px; color: var(--mute); font-size: .85rem; border-top: 1px solid var(--line); }

/* страницы категорий */
.crumbs { max-width: 760px; margin: 0 auto 4px; font-size: .85rem; color: var(--mute); }
.crumbs a { color: var(--mute); }
.crumbs > span { margin: 0 2px; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0 0 16px; }
.chips li { background: var(--acc-2); border-radius: 999px; padding: 4px 12px; font-size: .9rem; }
.disclaimer { background: #fff8e8; border: 1px solid #f0dcaa; border-radius: 8px; padding: 10px 12px; font-size: .88rem; margin-bottom: 20px; }
.calc-h { font-size: 1.2rem; margin: 20px 0 10px; }
article h2 { font-size: 1.3rem; line-height: 1.25; margin: 32px 0 10px; }
.tbl__wrap { overflow-x: auto; }
.tbl table { border-collapse: collapse; width: 100%; background: var(--card); }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 7px 10px; text-align: center; font-weight: 400; }
.tbl thead th { background: var(--acc-2); font-weight: 600; }
.tbl tbody th { font-weight: 600; background: #fafcfb; }
.tbl__note { font-size: .85rem; color: var(--mute); }
.faq h3 { font-size: 1.05rem; margin: 18px 0 4px; }
.faq p { margin: 0; }
.ref { color: var(--mute); font-size: .7rem; white-space: nowrap; }
.srcs ol { font-size: .85rem; color: var(--mute); padding-left: 20px; }
.srcs li { margin-bottom: 4px; }
.upd { font-size: .85rem; color: var(--mute); }