/* 바디넘버 — 노란 줄자 위에 내 숫자를 읽는 계산기 */

:root {
  --paper: #F4F3F8;
  --sheet: #FFFFFF;
  --ink: #221D33;
  --ink-2: #5A5570;
  --line: #DCD8E5;
  --well: #ECEAF2;
  --tape: #F5C624;
  --tape-edge: #D9AA0B;
  --tape-ink: #2B2410;
  --warn: #B4361F;
  --on-ink: #FFFFFF;

  /* 단계 색: 줄자 위 띠와 범례에만 씀 (글자색으로 쓰지 않음) */
  --c-under: #6E9BE6;
  --c-normal: #3A9F6B;
  --c-pre: #E9B83A;
  --c-ob1: #E57A35;
  --c-ob2: #D24A3F;
  --c-ob3: #962E58;
  --c-soft: #CFC9DD;

  --serif: "Hahmlet", "Apple SD Gothic Neo", serif;
  --sans: "SUIT Variable", SUIT, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;

  /* 1.25 비율 */
  --s-1: 0.8125rem;
  --s0: 1rem;
  --s1: 1.25rem;
  --s2: 1.5625rem;
  --s3: 1.953rem;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #18161F;
    --sheet: #221F2C;
    --ink: #EDEAF5;
    --ink-2: #A9A3BC;
    --line: #363244;
    --well: #2B2838;
    --warn: #FF8A70;
    --on-ink: #18161F;
    --c-soft: #4A4560;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #18161F;
  --sheet: #221F2C;
  --ink: #EDEAF5;
  --ink-2: #A9A3BC;
  --line: #363244;
  --well: #2B2838;
  --warn: #FF8A70;
  --on-ink: #18161F;
  --c-soft: #4A4560;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 var(--s0)/1.65 var(--sans);
  word-break: keep-all;
  overflow-wrap: anywhere;
  min-height: 100vh; display: flex; flex-direction: column;
}
body > .frame { flex: 1 0 auto; width: 100%; }
a { color: inherit; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- 머리 ---------- */
.bar { background: var(--sheet); border-bottom: 1px solid var(--line); }
.bar-in {
  max-width: 1040px; margin: 0 auto; padding: 0 16px;
  display: flex; align-items: center; gap: 28px;
}
.brand {
  display: flex; align-items: center; gap: 9px; flex: none;
  font: 700 1.125rem/1 var(--serif); text-decoration: none;
  padding: 14px 0;
}
.brand img { display: block; }
.tabs { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; margin-bottom: -1px; }
.tabs::-webkit-scrollbar { display: none; }
.tabs a {
  flex: none; padding: 17px 12px 15px; text-decoration: none;
  color: var(--ink-2); font-weight: 500; white-space: nowrap;
  border-bottom: 3px solid transparent;
}
.tabs a:hover { color: var(--ink); }
.tabs a[aria-selected="true"] { color: var(--ink); font-weight: 700; border-bottom-color: var(--ink); }
.tabs a:focus-visible { outline-offset: -4px; }

/* 화면 모드: 머리 오른쪽 끝의 작은 3칸 스위치 */
.theme {
  margin-left: auto; flex: none;
  display: inline-flex; padding: 2px; gap: 2px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--paper);
}
.theme button {
  font: 600 0.75rem/1 var(--sans); color: var(--ink-2);
  background: none; border: 0; border-radius: 999px;
  padding: 6px 10px; cursor: pointer; white-space: nowrap;
}
.theme button:hover { color: var(--ink); }
.theme button[aria-checked="true"] { background: var(--ink); color: var(--on-ink); }
.theme button:focus-visible { outline-offset: 2px; }

@media (max-width: 700px) {
  .bar-in { flex-wrap: wrap; gap: 0; }
  .brand { padding: 12px 0 4px; }
  .theme { margin-top: 8px; }
  .tabs { order: 1; width: calc(100% + 32px); margin: 0 -16px -1px; padding: 0 10px; }
  .tabs a { padding: 12px 10px 11px; }
}

/* ---------- 틀과 광고 ---------- */
.frame { max-width: 1040px; margin: 0 auto; padding: 0 16px; display: grid; grid-template-columns: minmax(0, 1fr); }
main { min-width: 0; padding-bottom: 56px; }

/* 광고 칸: 주석 처리된 ins 만 있으면 자리도 차지하지 않음. ins.adsbygoogle 을 풀면 나타남 */
.ad { display: none; }
.ad-inline:has(ins.adsbygoogle) { display: block; }
@media (min-width: 1280px) {
  .frame:has(.ad-side ins.adsbygoogle) { max-width: 1440px; grid-template-columns: 160px minmax(0, 1fr) 160px; gap: 40px; }
  .ad-side:has(ins.adsbygoogle) { display: block; padding-top: 40px; }
  .ad-side .ad-slot { position: sticky; top: 24px; }
  /* 레일이 있으면 본문 광고는 생략 */
  .frame:has(.ad-side ins.adsbygoogle) .ad-inline { display: none; }
}
.ad-slot { overflow: hidden; }
.ad-160 { width: 160px; min-height: 600px; }
/* 입력칸·버튼과 충분히 떨어지도록 참고 자료 아래에 크게 띄움 */
.ad-inline { min-height: 100px; margin: 120px 0 0; }

/* ---------- 본문 ---------- */
.intro {
  margin: 28px 0 18px;
  font: 600 var(--s2)/1.3 var(--serif);
  letter-spacing: -0.01em;
  max-width: 30ch;
}

.calc {
  display: grid; grid-template-columns: minmax(0, 330px) minmax(0, 1fr);
  background: var(--sheet); border: 1px solid var(--line); border-radius: 14px;
}
@media (max-width: 820px) { .calc { grid-template-columns: minmax(0, 1fr); } }

/* 입력 */
.inputs { padding: 22px 22px 18px; border-right: 1px solid var(--line); }
@media (max-width: 820px) { .inputs { border-right: 0; border-bottom: 1px solid var(--line); padding: 18px 16px 14px; } }
fieldset { border: 0; margin: 0 0 6px; padding: 0; min-width: 0; }
legend { padding: 0; margin-bottom: 12px; font-weight: 700; }
legend small { display: block; font-weight: 400; color: var(--ink-2); font-size: var(--s-1); }
.extra { margin-top: 18px; padding-top: 18px; border-top: 1px dashed var(--line); }
.extra > legend { float: left; width: 100%; }
.extra > legend + * { clear: both; }

.profile { display: grid; grid-template-columns: 1fr 1fr; column-gap: 12px; }
.profile legend { grid-column: 1 / -1; }
.f-sex { grid-column: 1 / -1; }
.field { margin-bottom: 4px; min-width: 0; }
.label { display: block; font-size: var(--s-1); font-weight: 600; color: var(--ink-2); margin-bottom: 5px; }
.opt { font-weight: 400; margin-left: 4px; }
.box {
  display: flex; align-items: baseline;
  background: var(--paper); border: 1.5px solid var(--line); border-radius: 9px;
  padding: 0 12px; transition: border-color .15s;
}
.box:focus-within { border-color: var(--ink); }
.box input {
  flex: 1; min-width: 0; width: 100%;
  border: 0; background: none; color: var(--ink); outline: none;
  font: 600 1.25rem/1 var(--serif); font-variant-numeric: tabular-nums;
  padding: 11px 0 10px;
  -moz-appearance: textfield;
}
.box input::-webkit-outer-spin-button, .box input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.box input::placeholder { color: var(--ink-2); opacity: .45; }
.unit { color: var(--ink-2); font-size: var(--s-1); margin-left: 6px; }
.field.bad .box { border-color: var(--warn); }
.msg { margin: 3px 0 0; min-height: 1.3em; font-size: var(--s-1); line-height: 1.3; color: var(--warn); }
.hint { margin: 2px 0 0; font-size: var(--s-1); color: var(--ink-2); }

/* 성별, 목표: 붙어 있는 라디오 버튼 */
.seg { display: flex; background: var(--paper); border: 1.5px solid var(--line); border-radius: 9px; padding: 3px; }
.seg label { flex: 1; position: relative; }
.seg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.seg span {
  display: block; text-align: center; padding: 8px 6px; border-radius: 6px;
  font-weight: 600; color: var(--ink-2); cursor: pointer;
}
.seg input:checked + span { background: var(--ink); color: var(--on-ink); }
.seg input:focus-visible + span { outline: 2px solid var(--ink); outline-offset: 2px; }

/* 활동량 */
.acts { display: grid; gap: 6px; margin-bottom: 14px; }
.act {
  position: relative; display: grid; grid-template-columns: 1fr auto; column-gap: 10px;
  padding: 9px 12px; border: 1.5px solid var(--line); border-radius: 9px; cursor: pointer;
}
.act input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.act-t { font-weight: 600; }
.act-t em { font-style: normal; font-weight: 400; color: var(--ink-2); font-size: var(--s-1); margin-left: 2px; }
.act-d { grid-column: 1; font-size: var(--s-1); color: var(--ink-2); line-height: 1.4; }
.act-k { grid-column: 2; grid-row: 1 / 3; align-self: center; font: 600 var(--s0)/1 var(--serif); font-variant-numeric: tabular-nums; white-space: nowrap; }
.act:has(input:checked) { border-color: var(--ink); background: var(--well); box-shadow: inset 4px 0 0 var(--ink); }
.act:has(input:focus-visible) { outline: 2px solid var(--ink); outline-offset: 2px; }

.privacy { margin: 14px 0 0; font-size: var(--s-1); color: var(--ink-2); }
.link { background: none; border: 0; padding: 0; font: inherit; color: var(--ink); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }

/* 어떤 입력칸이 보일지: .calc 의 data-tool 로 정함 */
.calc .extra { display: none; }
.calc[data-tool="body-fat"] .x-body-fat, .calc[data-tool="calories"] .x-calories { display: block; }
.calc[data-tool="bmi"] :is(.f-sex, .f-age),
.calc[data-tool="ideal-weight"] :is(.f-sex, .f-age),
.calc[data-tool="body-fat"] .f-age { display: none; }
.calc .opt { display: none; }
.calc:is([data-tool="body-fat"], [data-tool="ideal-weight"]) .opt { display: inline; }
.calc[data-sex="m"] .f-hip { display: none; }

/* ---------- 결과 ---------- */
.result { padding: 26px 28px 24px; min-width: 0; display: flex; flex-direction: column; }
@media (max-width: 820px) { .result { padding: 20px 16px 18px; } }
.reading { min-height: 168px; }
@media (max-width: 820px) { .reading { min-height: 0; } .tape-wrap { margin-top: 18px; } }
.r-name { margin: 0; font-weight: 600; color: var(--ink-2); }
.r-value {
  margin: 2px 0 0; display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap;
  font: 700 clamp(3.75rem, 11vw, 6.25rem)/1 var(--serif);
  font-variant-numeric: tabular-nums; letter-spacing: -0.03em;
}
.r-value small { font: 600 var(--s1)/1 var(--sans); letter-spacing: 0; color: var(--ink-2); }
.r-value .alt { font-size: 0.42em; color: var(--ink-2); letter-spacing: -0.01em; }
.r-class { margin: 10px 0 0; font-size: var(--s1); font-weight: 700; display: flex; align-items: center; gap: 9px; }
.r-class i { width: 14px; height: 14px; border-radius: 50%; flex: none; background: var(--c); }
.result.empty #r-num { color: var(--c-soft); }
.result.empty .r-class { font-size: var(--s0); font-weight: 500; color: var(--ink-2); }

/* 줄자 */
.tape-wrap { margin: 26px 0 8px; }
.tape { position: relative; padding: 30px 0 34px; }
.bands { display: flex; height: 8px; border-radius: 4px 4px 0 0; overflow: hidden; background: var(--c-soft); }
.bands i { display: block; height: 100%; }
.ruler {
  position: relative; height: 46px;
  background-color: var(--tape);
  background-image:
    repeating-linear-gradient(90deg, var(--tape-ink) 0 1.5px, transparent 1.5px var(--major)),
    repeating-linear-gradient(90deg, var(--tape-ink) 0 1px, transparent 1px var(--minor));
  background-size: 100% 46%, 100% 26%;
  background-repeat: no-repeat;
  border-bottom: 2px solid var(--tape-edge);
  border-radius: 0 0 3px 3px;
  box-shadow: 0 1px 0 rgba(43, 36, 16, .12);
}
.ruler .n {
  position: absolute; bottom: 5px; transform: translateX(-50%);
  font: 600 0.8125rem/1 var(--serif); color: var(--tape-ink); font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.ruler .n:first-child { transform: none; margin-left: 3px; }
.ruler .n.last { transform: translateX(-100%); margin-left: -3px; }
.needle {
  position: absolute; top: 18px; bottom: 52px; width: 0;
  transition: left .45s cubic-bezier(.3, .9, .3, 1);
}
/* 바늘은 노란 줄자 위에 있으니 테마와 상관없이 진한 색, 머리 삼각형만 테마 글자색 */
.needle::before { content: ""; position: absolute; left: -1.5px; top: 0; bottom: 0; width: 3px; background: var(--tape-ink); border-radius: 2px; }
.needle::after {
  content: ""; position: absolute; left: -7px; top: -2px;
  border: 7px solid transparent; border-top: 9px solid var(--ink); border-bottom: 0;
}
.needle b {
  position: absolute; bottom: calc(100% + 6px); white-space: nowrap;
  font: 700 var(--s-1)/1 var(--sans); transform: translateX(-50%);
}
.needle.sub::before { width: 2px; left: -1px; background: var(--tape-ink); opacity: .55; }
.needle.sub::after { display: none; }
.needle.sub b { bottom: auto; top: calc(100% + 26px); color: var(--ink-2); font-weight: 600; }
.needle.edge-l b { transform: translateX(-8px); }
.needle.edge-r b { transform: translateX(calc(-100% + 8px)); }
.tape.off .needle { display: none; }

/* 범례·부가 정보 */
.r-more { margin-top: 10px; }
.legend { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 2px 14px; font-size: var(--s-1); }
.legend li { display: flex; align-items: center; gap: 8px; padding: 5px 8px; border-radius: 6px; color: var(--ink-2); }
.legend li i { width: 10px; height: 10px; border-radius: 2px; background: var(--c); flex: none; }
.legend li span { margin-left: auto; font-variant-numeric: tabular-nums; }
.legend li.on { background: var(--well); color: var(--ink); font-weight: 700; }
.facts { margin: 14px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.facts li { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.facts li b { font: 600 var(--s0)/1.4 var(--serif); font-variant-numeric: tabular-nums; text-align: right; }
.note { margin: 12px 0 0; font-size: var(--s-1); color: var(--ink-2); }
.note.warn { color: var(--warn); font-weight: 600; }

.disclaimer {
  margin: 14px 2px 0; font-size: var(--s-1); color: var(--ink-2);
  padding-left: 12px; border-left: 3px solid var(--tape);
}

/* ---------- 안내 글 ---------- */
.guide { max-width: 68ch; margin-top: 72px; }
.guide h2 { font: 600 var(--s3)/1.25 var(--serif); letter-spacing: -0.01em; margin: 0 0 14px; }
.guide h3 { font: 600 var(--s1)/1.35 var(--serif); margin: 40px 0 10px; }
.guide p, .guide li { color: var(--ink); }
.guide .lead { color: var(--ink-2); font-size: 1.0625rem; }
.guide ul, .guide ol { padding-left: 1.25em; }
.guide li { margin: 6px 0; }
.guide li::marker { color: var(--ink-2); }
.guide article + article { border-top: 1px solid var(--line); margin-top: 40px; }
.guide article h3 { margin-top: 36px; }
.formula {
  font: 500 var(--s0)/1.6 var(--serif);
  background: var(--sheet); border: 1px solid var(--line); border-left: 4px solid var(--tape);
  border-radius: 0 8px 8px 0; padding: 12px 16px; margin: 16px 0;
}
.formula span { display: block; font-size: var(--s-1); color: var(--ink-2); font-family: var(--sans); }
.formula sub { font-size: .7em; line-height: 0; }
.ref { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 0.9375rem; font-variant-numeric: tabular-nums; }
.ref caption { text-align: left; font-weight: 700; margin-bottom: 6px; }
.ref th, .ref td { text-align: left; padding: 8px 10px 8px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.ref th { font-size: var(--s-1); color: var(--ink-2); font-weight: 600; border-bottom-color: var(--ink-2); }
.faq h3 { font-size: var(--s0); font-family: var(--sans); font-weight: 700; margin: 28px 0 6px; }
.sources ul { font-size: 0.9375rem; color: var(--ink-2); }
.sources li { color: var(--ink-2); }
.sources a { color: var(--ink); }

/* ---------- 바닥 ---------- */
.foot { border-top: 1px solid var(--line); background: var(--sheet); font-size: var(--s-1); color: var(--ink-2); }
.foot-in { max-width: 1040px; margin: 0 auto; padding: 28px 16px 40px; display: grid; gap: 10px; }
.foot p { margin: 0; }
.foot nav { display: flex; flex-wrap: wrap; gap: 4px 12px; align-items: baseline; }
.foot-h { font-weight: 700; color: var(--ink); }
.foot-links { display: flex; flex-wrap: wrap; gap: 4px 16px; list-style: none; margin: 0; padding: 0; }
.foot-links a { color: var(--ink); }

/* 404 */
.nf { padding: 56px 0 40px; max-width: 52ch; }
.nf .tape { padding-top: 34px; }
.nf h1 { font: 600 var(--s3)/1.25 var(--serif); margin: 28px 0 8px; }
.nf p { color: var(--ink-2); }
.nf-links { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 20px 0 0; }
.nf-links a { display: inline-block; padding: 9px 14px; border: 1.5px solid var(--line); border-radius: 9px; text-decoration: none; font-weight: 600; background: var(--sheet); }
.nf-links a:hover { border-color: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}