@charset "UTF-8";

/* ============================================================
   日本骨密度プロジェクト — 共通スタイル
   既存LPのトークンを踏襲（深緑／アンバー／アイボリー）
   ============================================================ */

:root {
  --pine:        #2C5545;
  --pine-deep:   #213F33;
  --pine-soft:   #4A7261;
  --amber:       #C0813A;
  --amber-light: #D9A55B;
  --ivory:       #F7F3EA;
  --paper:       #FCFAF5;
  --ink:         #2A2823;
  --ink-mute:    #6B6558;
  --rule:        #E3DCCB;

  --serif: "Shippori Mincho B1", "Hiragino Mincho ProN", serif;
  --sans:  "Zen Kaku Gothic New", "Hiragino Sans", "Noto Sans JP", sans-serif;

  --wrap: 720px;
  --wrap-wide: 1080px;
}

*, *::before, *::after { box-sizing: border-box; }

/* 安全弁：どんな場合でも画像が枠を超えない */
img, svg, video, canvas {
  max-width: 100%;
  height: auto;
}

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.95;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}

a { color: var(--pine); text-underline-offset: .2em; }
a:hover { color: var(--amber); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

.skip {
  position: absolute; left: -9999px;
  background: var(--pine); color: #fff; padding: .6em 1em; z-index: 100;
}
.skip:focus { left: 1rem; top: 1rem; }

.wrap { max-width: var(--wrap-wide); margin: 0 auto; padding: 0 24px; }

/* ---------------------------------------------------------- header */
.site-head {
  background: var(--pine-deep);
  color: var(--ivory);
  position: sticky; top: 0; z-index: 50;
}
.site-head .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 62px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }
.brand-mark {
  width: 9px; height: 22px; border-radius: 9px;
  background: linear-gradient(var(--amber-light), var(--amber));
}
.brand-name { font-family: var(--serif); font-weight: 700; font-size: 1.02rem; letter-spacing: .06em; }
.site-nav { display: flex; align-items: center; gap: 22px; font-size: .87rem; }
.site-nav a { color: var(--ivory); text-decoration: none; }
.site-nav a:hover { color: var(--amber-light); }
.site-nav .nav-cta {
  border: 1px solid var(--amber-light); color: var(--amber-light);
  padding: .38em 1.1em; border-radius: 999px;
}
.site-nav .nav-cta:hover { background: var(--amber-light); color: var(--pine-deep); }
@media (max-width: 640px) {
  .site-head .wrap { padding: 10px 18px; }
  .site-nav { gap: 14px; font-size: .8rem; width: 100%; padding-bottom: 8px; }
}

/* ---------------------------------------------------------- 記事本体 */
.doc { max-width: var(--wrap); margin: 0 auto; padding: 0 24px 96px; }

.crumb { font-size: .78rem; color: var(--ink-mute); padding: 22px 0 0; }
.crumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: .5em; margin: 0; padding: 0; }
.crumb li + li::before { content: "／"; margin-right: .5em; color: var(--rule); }

.eyebrow {
  font-size: .74rem; letter-spacing: .18em; color: var(--amber);
  margin: 40px 0 10px; font-weight: 700;
}

.doc h1 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(1.72rem, 5.2vw, 2.4rem);
  line-height: 1.5; letter-spacing: .02em;
  margin: 0 0 18px; color: var(--pine-deep);
}
.lede { font-size: 1.04rem; color: var(--ink-mute); margin: 0 0 8px; }

.doc h2 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(1.3rem, 3.6vw, 1.6rem);
  line-height: 1.6; color: var(--pine-deep);
  margin: 68px 0 20px; padding-left: 16px;
  border-left: 4px solid var(--amber);
}
.doc h3 {
  font-family: var(--serif); font-weight: 700; font-size: 1.12rem;
  color: var(--pine); margin: 40px 0 12px;
}
.doc h4 { font-size: .98rem; font-weight: 700; color: var(--pine); margin: 26px 0 8px; }
.doc p { margin: 0 0 1.3em; }
.doc ul, .doc ol { margin: 0 0 1.5em; padding-left: 1.35em; }
.doc li { margin-bottom: .55em; }
.doc strong { font-weight: 700; color: var(--pine-deep); }
.doc small { color: var(--ink-mute); font-size: .82rem; line-height: 1.8; display: inline-block; }

/* 目次 */
.toc {
  background: var(--ivory); border: 1px solid var(--rule); border-radius: 4px;
  padding: 22px 26px; margin: 36px 0 8px;
}
.toc-title {
  font-family: var(--serif); font-weight: 700; font-size: .95rem;
  color: var(--pine-deep); margin: 0 0 10px;
}
.toc ol { counter-reset: toc; list-style: none; padding: 0; margin: 0; }
.toc li { counter-increment: toc; margin-bottom: .4em; font-size: .9rem; }
.toc li::before {
  content: counter(toc, decimal-leading-zero);
  color: var(--amber); font-size: .78rem; margin-right: .7em; font-weight: 700;
}
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }

/* ---------------------------------------------------------- 比較表 */
.table-scroll { overflow-x: auto; margin: 0 0 12px; -webkit-overflow-scrolling: touch; }
table.cmp {
  border-collapse: collapse; width: 100%; min-width: 620px;
  font-size: .88rem; line-height: 1.75;
}
table.cmp th, table.cmp td {
  border-bottom: 1px solid var(--rule); padding: 14px 12px; text-align: left; vertical-align: top;
}
table.cmp thead th {
  background: var(--pine-deep); color: var(--ivory);
  font-weight: 500; font-size: .82rem; letter-spacing: .04em; border-bottom: none;
}
table.cmp tbody th { font-weight: 700; color: var(--pine-deep); white-space: nowrap; }
table.cmp tbody tr:nth-child(even) { background: var(--ivory); }

/* 精度バッジ（署名要素） */
.grade {
  display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .05em;
  padding: .25em .8em; border-radius: 999px; white-space: nowrap;
}
.grade-dx { background: var(--pine); color: #fff; }
.grade-sub { background: var(--amber-light); color: #4a3210; }
.grade-scr { background: #fff; color: var(--ink-mute); border: 1px solid var(--rule); }

/* ---------------------------------------------------------- 囲み */
.note, .caution {
  border-radius: 4px; padding: 20px 24px; margin: 30px 0;
  font-size: .93rem; line-height: 1.85;
}
.note { background: var(--ivory); border-left: 3px solid var(--pine-soft); }
.caution { background: #FBF4E7; border-left: 3px solid var(--amber); }
.note p:last-child, .caution p:last-child { margin-bottom: 0; }
.note-title, .caution-title {
  font-family: var(--serif); font-weight: 700; font-size: .95rem;
  margin: 0 0 .5em; color: var(--pine-deep);
}

/* 数値ハイライト */
.stat {
  display: flex; align-items: baseline; gap: .5em;
  font-family: var(--serif); color: var(--pine-deep);
}
.stat-num { font-size: 2.1rem; font-weight: 700; line-height: 1; }
.stat-unit { font-size: .95rem; }

/* 判定スケール */
.scale { margin: 26px 0 34px; }
.scale-row {
  display: grid; grid-template-columns: 8.5em 1fr; gap: 14px;
  align-items: center; padding: 12px 0; border-bottom: 1px solid var(--rule);
}
.scale-key { font-weight: 700; font-size: .88rem; color: var(--pine-deep); }
.scale-val { font-size: .9rem; }
.scale-bar { height: 6px; border-radius: 6px; margin-top: 7px; background: var(--rule); }
.scale-bar span { display: block; height: 100%; border-radius: 6px; background: var(--pine); }
.scale-bar.warn span { background: var(--amber-light); }
.scale-bar.alert span { background: #A8552F; }
@media (max-width: 560px) {
  .scale-row { grid-template-columns: 1fr; gap: 4px; }
}

/* FAQ */
.faq { margin: 26px 0; border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary {
  cursor: pointer; padding: 17px 34px 17px 0; position: relative;
  font-weight: 700; font-size: .95rem; color: var(--pine-deep); list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "＋"; position: absolute; right: 4px; top: 50%;
  transform: translateY(-50%); color: var(--amber); font-weight: 400;
}
.faq details[open] summary::after { content: "－"; }
.faq .faq-body { padding: 0 0 18px; font-size: .92rem; color: var(--ink-mute); }
.faq .faq-body p:last-child { margin-bottom: 0; }

/* 出典 */
.refs { margin: 54px 0 0; padding-top: 22px; border-top: 1px solid var(--rule); }
.refs h2 { font-size: 1rem !important; border-left: none !important; padding-left: 0 !important; margin: 0 0 12px !important; }
.refs ol { font-size: .8rem; color: var(--ink-mute); line-height: 1.8; padding-left: 1.4em; }
.refs li { margin-bottom: .5em; }

/* 関連リンク */
.related { margin: 46px 0 0; }
.related-list { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); list-style: none; padding: 0; }
.related-list a {
  display: block; border: 1px solid var(--rule); border-radius: 4px;
  padding: 16px 18px; text-decoration: none; background: #fff; height: 100%;
}
.related-list a:hover { border-color: var(--amber); }
.related-ttl { font-family: var(--serif); font-weight: 700; color: var(--pine-deep); display: block; margin-bottom: 4px; }
.related-desc { font-size: .8rem; color: var(--ink-mute); }

/* ---------------------------------------------------------- 監修 */
.supervisor {
  margin: 60px 0 0; padding: 24px 26px;
  background: var(--ivory); border: 1px solid var(--rule); border-radius: 4px;
}
.supervisor-label { font-size: .72rem; letter-spacing: .16em; color: var(--amber); font-weight: 700; margin: 0 0 6px; }
.supervisor-name { font-family: var(--serif); font-weight: 700; font-size: 1.05rem; color: var(--pine-deep); margin: 0 0 10px; }
.supervisor-name span { font-family: var(--sans); font-size: .8rem; font-weight: 400; color: var(--ink-mute); margin-left: .6em; }
.supervisor-note { font-size: .82rem; color: var(--ink-mute); line-height: 1.85; margin: 0 0 10px; }
.supervisor-date { font-size: .74rem; color: var(--ink-mute); margin: 0; }

/* ---------------------------------------------------------- CTA */
.cta {
  margin: 40px 0 0; padding: 44px 32px; border-radius: 6px;
  background: linear-gradient(160deg, var(--pine) 0%, var(--pine-deep) 100%);
  color: var(--ivory); text-align: center;
}
.cta-eyebrow { font-size: .72rem; letter-spacing: .18em; color: var(--amber-light); margin: 0 0 10px; font-weight: 700; }
.cta h2 {
  font-family: var(--serif); font-size: 1.3rem; margin: 0 0 14px !important;
  color: var(--ivory) !important; border-left: none !important; padding-left: 0 !important;
}
.cta-lead { font-size: .9rem; margin: 0 auto 24px; max-width: 34em; opacity: .9; }
.cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 0; }
.btn {
  display: inline-block; padding: .85em 2em; border-radius: 999px;
  text-decoration: none; font-size: .9rem; font-weight: 700;
}
.btn-primary { background: var(--amber); color: #fff; }
.btn-primary:hover { background: var(--amber-light); color: #fff; }
.btn-ghost { border: 1px solid rgba(247,243,234,.5); color: var(--ivory); }
.btn-ghost:hover { background: rgba(247,243,234,.12); color: var(--ivory); }

/* ---------------------------------------------------------- footer */
.site-foot { background: var(--pine-deep); color: var(--ivory); padding: 40px 0 34px; }
.foot-nav { display: flex; flex-wrap: wrap; gap: 20px; font-size: .84rem; margin-bottom: 18px; }
.foot-nav a { color: var(--ivory); text-decoration: none; opacity: .85; }
.foot-nav a:hover { color: var(--amber-light); opacity: 1; }
.foot-note { font-size: .82rem; opacity: .8; margin: 0 0 8px; }
.foot-note a { color: var(--amber-light); }
.foot-copy { font-size: .74rem; opacity: .6; margin: 0; }

/* ---------------------------------------------------------- 挿絵 */
.fig {
  margin: 38px 0;
  padding: 0;
}
.fig img {
  display: block; width: 100%; height: auto;
  border-radius: 5px; background: var(--ivory);
}
.fig figcaption {
  font-size: .8rem; color: var(--ink-mute); line-height: 1.8;
  margin-top: 12px; padding-left: 12px; border-left: 2px solid var(--amber);
}

/* ヒーロー（H1直下・記事の顔） */
.fig-hero { margin: 26px 0 40px; }
.fig-hero img { border-radius: 6px; }

/* 幅を本文より広げる（デスクトップのみ） */
@media (min-width: 900px) {
  .fig-wide { margin-left: -60px; margin-right: -60px; }
}

/* 画像未配置時のプレースホルダ */
.fig-placeholder {
  display: flex; align-items: center; justify-content: center;
  background: var(--ivory); border: 1px dashed var(--rule); border-radius: 5px;
  color: var(--ink-mute); font-size: .82rem; text-align: center;
  padding: 20px; line-height: 1.8;
}

/* 縦長の図版は幅を抑えて中央寄せ（スクロール過多の防止） */
.fig-portrait { display: flex; flex-direction: column; align-items: center; }
.fig-portrait img { max-width: 420px; }
.fig-portrait figcaption { max-width: 100%; align-self: stretch; }

/* ---------------------------------------------------------- 図表（SVG） */
.chart { display: block; width: 100%; height: auto; border-radius: 4px; }
.fig-chart { margin: 34px 0; }
.fig-chart figcaption {
  font-size: .8rem; color: var(--ink-mute); line-height: 1.8;
  margin-top: 12px; padding-left: 12px; border-left: 2px solid var(--amber);
}

/* ============================================================
   ピラーページ（/bone/）
   ============================================================ */

.doc.pillar { max-width: 880px; }

.pillar-head { text-align: center; padding: 40px 0 8px; }
.pillar-head h1 {
  font-size: clamp(1.8rem, 5.4vw, 2.6rem);
  margin-bottom: 20px;
}
.pillar-head .lede { max-width: 34em; margin: 0 auto 8px; text-align: left; }

/* トピックカード */
.topics { margin: 56px 0 0; display: grid; gap: 26px; }

.topic {
  display: grid; grid-template-columns: 268px 1fr; gap: 0;
  border: 1px solid var(--rule); border-radius: 6px;
  background: #fff; padding: 0; overflow: hidden;
  text-decoration: none; color: inherit;
  transition: border-color .18s ease;
}
.topic:hover { border-color: var(--amber); color: inherit; }
.topic-thumb {
  width: 100%; height: 100%; min-height: 200px;
  object-fit: cover; background: var(--ivory); display: block;
}
.topic > div { padding: 26px 28px; }
.topic-num {
  font-size: .72rem; letter-spacing: .16em; color: var(--amber);
  font-weight: 700; margin: 0 0 6px;
}
.topic-ttl {
  font-family: var(--serif); font-weight: 700;
  font-size: 1.24rem; color: var(--pine-deep);
  margin: 0 0 10px; line-height: 1.5;
}
.topic-body { font-size: .93rem; line-height: 1.9; margin: 0 0 12px; }
.topic-more { font-size: .86rem; font-weight: 700; color: var(--pine); }
.topic:hover .topic-more { color: var(--amber); }
.topic-more::after { content: " →"; }

@media (max-width: 680px) {
  .topic { grid-template-columns: 1fr; }
  .topic-thumb { height: 190px; min-height: 0; }
  .topic > div { padding: 20px 22px 22px; }
}

/* 読む順ガイド */
.guide {
  margin: 64px 0 0; padding: 30px 32px;
  background: var(--ivory); border: 1px solid var(--rule); border-radius: 6px;
}
.guide h2 {
  font-size: 1.14rem !important; margin: 0 0 18px !important;
  border-left: none !important; padding-left: 0 !important;
}
.guide-row {
  display: grid; grid-template-columns: 11em 1fr; gap: 16px;
  padding: 14px 0; border-top: 1px solid var(--rule);
  font-size: .92rem; align-items: baseline;
}
.guide-row:first-of-type { border-top: none; padding-top: 0; }
.guide-key { font-weight: 700; color: var(--pine-deep); }
.guide-val a { font-weight: 700; }
@media (max-width: 620px) {
  .guide { padding: 24px 22px; }
  .guide-row { grid-template-columns: 1fr; gap: 4px; }
}