/* STORUS 2026 — 素材（ステンレス）を軸にした配色。赤は「楽天で購入」だけに使う */
:root {
  --paper: #f2f3f1;
  --white: #ffffff;
  --ink: #14181c;
  --ink-2: #4a535b;
  --steel: #87919a;
  --line: #d3d8dc;
  --rakuten: #bf0000;
  --rakuten-h: #9d0000;
  --max: 1120px;
  --pad: clamp(20px, 5vw, 40px);
  --jp: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --num: "Barlow Semi Condensed", "Zen Kaku Gothic New", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  font-family: var(--jp);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
ul, ol { list-style: none; }
h1, h2, h3 { line-height: 1.35; font-weight: 700; letter-spacing: .01em; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.band { padding: clamp(56px, 9vw, 104px) 0; }
.band-paper { background: var(--paper); }
.band-ink { background: var(--ink); color: var(--white); }
.h2 { font-size: clamp(24px, 4.2vw, 36px); }
.lead { color: var(--ink-2); max-width: 36em; margin-top: 14px; }
.band-ink .lead { color: #c3cad0; }
.num { font-family: var(--num); font-weight: 600; letter-spacing: 0; }

/* ---------- Header ---------- */
.hd {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
}
.hd-in { display: flex; align-items: center; gap: 20px; height: 60px; }
.hd-logo img { width: 112px; height: auto; }
.hd-nav { display: none; gap: 26px; margin-left: auto; font-size: 14px; font-weight: 500; }
.hd-nav a { text-decoration: none; padding: 6px 0; }
.hd-nav a:hover { text-decoration: underline; text-underline-offset: 6px; }
.hd-buy { margin-left: auto; }
.hd-menu { position: relative; }
.hd-menu summary {
  list-style: none; cursor: pointer; font-size: 13px; font-weight: 700;
  border: 1px solid var(--ink); padding: 7px 12px; border-radius: 2px;
}
.hd-menu summary::-webkit-details-marker { display: none; }
.hd-menu ul {
  position: absolute; right: 0; top: calc(100% + 10px); width: 230px;
  background: var(--white); border: 1px solid var(--ink);
}
.hd-menu li + li { border-top: 1px solid var(--line); }
.hd-menu a { display: block; padding: 13px 16px; text-decoration: none; font-size: 15px; }
@media (min-width: 880px) {
  .hd-nav { display: flex; }
  .hd-buy { margin-left: 8px; }
  .hd-menu { display: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; text-align: center;
  min-height: 54px; padding: 12px 26px;
  font: 700 16px/1.3 var(--jp); text-decoration: none;
  border: 2px solid var(--ink); border-radius: 2px; background: var(--white); color: var(--ink);
  transition: background .15s, color .15s, border-color .15s;
}
.btn:hover { background: var(--ink); color: var(--white); }
.btn-rakuten { background: var(--rakuten); border-color: var(--rakuten); color: var(--white); }
.btn-rakuten:hover { background: var(--rakuten-h); border-color: var(--rakuten-h); }
.btn-sm { min-height: 40px; padding: 6px 14px; font-size: 13px; }
.btn small { display: block; font-size: 12px; font-weight: 500; opacity: .9; }
.btn-stack { flex-direction: column; gap: 2px; }
.buy { display: grid; gap: 10px; margin-top: 22px; }
@media (min-width: 560px) { .buy { grid-template-columns: 1.3fr 1fr; } }
.textlink { font-weight: 700; text-underline-offset: 5px; }

/* ---------- Hero（トップ） ---------- */
.hero { background: var(--paper); overflow: hidden; }
.hero-in { display: grid; gap: 8px; padding-top: 28px; padding-bottom: 44px; }
.hero-photo { margin: 0 calc(var(--pad) * -1); }
.hero-photo img { width: 100%; aspect-ratio: 1 / .82; object-fit: cover; mix-blend-mode: multiply; }
.hero h1 { font-size: clamp(30px, 7.4vw, 56px); font-weight: 900; line-height: 1.22; }
.hero h1 .num { font-size: 1.28em; font-weight: 700; }
.hero-sub { margin-top: 14px; color: var(--ink-2); max-width: 30em; }
.price { margin-top: 22px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.price b { font: 600 40px/1 var(--num); }
.price span { font-size: 13px; color: var(--ink-2); }
.hero-note { margin-top: 12px; font-size: 13px; color: var(--ink-2); }
@media (min-width: 880px) {
  .hero-in { grid-template-columns: 1fr 1fr; align-items: center; gap: 40px; padding-top: 40px; padding-bottom: 56px; }
  .hero-photo { margin: 0; order: 2; }
  .hero-photo img { aspect-ratio: 1 / 1; }
}

/* 厚さゲージ：同じ縮尺で描いた断面 */
.gauge { margin-top: 30px; border-top: 1px solid var(--line); padding-top: 18px; display: grid; gap: 12px; max-width: 460px; }
.gauge-row { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 12px; font-size: 13px; }
.gauge-bar { display: block; width: 100%; background: var(--steel); border-radius: 1px; margin-bottom: 6px; }
.gauge-bar.is-clip { height: 15px; background: var(--ink); }
.gauge-bar.is-wallet { height: 32px; }
.gauge-val { font: 600 22px/1 var(--num); padding-bottom: 4px; white-space: nowrap; }
.gauge figcaption { font-size: 12px; color: var(--ink-2); }

/* ---------- 事実の帯 ---------- */
.facts { border-bottom: 1px solid var(--line); }
.facts ul { display: grid; grid-template-columns: 1fr 1fr; }
.facts li { padding: 18px 12px 18px 0; border-top: 1px solid var(--line); font-size: 13px; color: var(--ink-2); line-height: 1.5; }
.facts li:nth-child(-n+2) { border-top: 0; }
.facts b { display: block; color: var(--ink); font-size: 16px; margin-bottom: 2px; }
@media (min-width: 880px) {
  .facts ul { grid-template-columns: repeat(4, 1fr); }
  .facts li { border-top: 0; padding: 26px 20px 26px 0; }
}

/* ---------- 使い方から選ぶ ---------- */
.uses { display: grid; gap: 14px; margin-top: 34px; }
.use { display: grid; grid-template-columns: 104px 1fr; gap: 16px; align-items: center; background: var(--white); border: 1px solid var(--line); padding: 14px; text-decoration: none; }
.use:hover { border-color: var(--ink); }
.use img { aspect-ratio: 1; object-fit: cover; width: 100%; }
.use h3 { font-size: 17px; }
.use p { font-size: 14px; color: var(--ink-2); line-height: 1.65; margin-top: 4px; }
.use .pick { display: block; margin-top: 8px; font-size: 13px; font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }
@media (min-width: 880px) {
  .uses { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .use { grid-template-columns: 1fr; align-items: start; padding: 18px; }
  .use img { aspect-ratio: 4 / 3; }
}

/* ---------- 写真＋文章 ---------- */
.split { display: grid; gap: 28px; align-items: center; }
.split img { width: 100%; border: 1px solid var(--line); }
.band-ink .split img { border: 0; }
.split p + p { margin-top: 12px; }
.split .btn { margin-top: 22px; }
@media (min-width: 880px) {
  .split { grid-template-columns: 1fr 1fr; gap: 64px; }
  .split.is-rev > :first-child { order: 2; }
}
.ticks { margin-top: 18px; display: grid; gap: 8px; }
.ticks li { padding-left: 22px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .78em; width: 12px; height: 2px; background: currentColor; }

/* ---------- モデル比較 ---------- */
.models { margin-top: 32px; display: grid; gap: 14px; }
.model { display: grid; grid-template-columns: 96px 1fr; gap: 4px 16px; padding: 16px; background: var(--white); border: 1px solid var(--line); }
.model.is-main { border: 2px solid var(--ink); }
.model img { grid-row: span 3; aspect-ratio: 1; object-fit: cover; width: 100%; }
.model h3 { font-size: 16px; }
.model h3 a { text-decoration: none; }
.model h3 a:hover { text-decoration: underline; }
.model .tag { display: inline-block; font-size: 11px; font-weight: 700; background: var(--ink); color: var(--white); padding: 1px 8px; margin-bottom: 4px; }
.model .yen { font: 600 22px/1.2 var(--num); }
.model .yen small { font: 400 12px var(--jp); color: var(--ink-2); }
.model dl { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 16px; margin-top: 10px; font-size: 13px; }
.model dl div { display: flex; justify-content: space-between; gap: 8px; border-top: 1px solid var(--line); padding: 7px 0; }
.model dt { color: var(--ink-2); }
.model dd { font-weight: 700; text-align: right; }
.model .more { grid-column: 1 / -1; margin-top: 10px; }
@media (min-width: 880px) {
  .models { grid-template-columns: repeat(5, 1fr); gap: 12px; }
  .model { grid-template-columns: 1fr; padding: 16px; align-content: start; }
  .model img { grid-row: auto; aspect-ratio: 4 / 3; margin-bottom: 8px; }
  .model dl { grid-template-columns: 1fr; }
}
.fine { font-size: 12px; color: var(--ink-2); margin-top: 14px; }

/* ---------- FAQ ---------- */
.faq { margin-top: 28px; border-top: 1px solid var(--ink); max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 18px 40px 18px 0; font-weight: 700; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%); font: 400 26px/1 var(--num); }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 0 20px; color: var(--ink-2); }

/* ---------- 最後の購入ブロック ---------- */
.closing { text-align: left; }
.closing .buy { max-width: 560px; }
.closing .btn:not(.btn-rakuten) { background: transparent; color: var(--white); border-color: var(--white); }
.closing .btn:not(.btn-rakuten):hover { background: var(--white); color: var(--ink); }

/* ---------- Footer ---------- */
.ft { border-top: 1px solid var(--line); padding: 48px 0 110px; font-size: 14px; color: var(--ink-2); }
.ft-grid { display: grid; gap: 32px; }
.ft img { width: 120px; margin-bottom: 12px; }
.ft h2 { font-size: 14px; color: var(--ink); margin-bottom: 8px; }
.ft li { padding: 3px 0; }
.ft address { font-style: normal; }
.ft-copy { margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 12px; }
@media (min-width: 880px) { .ft { padding-bottom: 56px; } .ft-grid { grid-template-columns: 1.4fr 1fr 1fr; } }

/* ---------- スマホ下部の購入バー ---------- */
.bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: var(--white); border-top: 1px solid var(--ink);
  transform: translateY(110%); transition: transform .25s ease;
}
.bar.is-on { transform: none; }
.bar-txt { flex: 1; min-width: 0; font-size: 12px; line-height: 1.35; color: var(--ink-2); }
.bar-txt b { display: block; font: 600 20px/1.1 var(--num); color: var(--ink); }
.bar .btn { min-height: 46px; padding: 8px 18px; font-size: 15px; white-space: nowrap; }
@media (min-width: 880px) { .bar { display: none; } }

/* ---------- 商品ページ ---------- */
.crumb { font-size: 12px; color: var(--ink-2); padding: 14px 0; }
.crumb ol { display: flex; gap: 8px; flex-wrap: wrap; }
.crumb li + li::before { content: "/"; margin-right: 8px; color: var(--steel); }
.pd { display: grid; gap: 26px; padding-bottom: 56px; }
.pd-gallery { min-width: 0; }
.pd-track { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; margin: 0 calc(var(--pad) * -1); background: var(--paper); }
.pd-track::-webkit-scrollbar { display: none; }
.pd-track img { flex: 0 0 100%; width: 100%; aspect-ratio: 1; object-fit: contain; scroll-snap-align: center; }
.pd-thumbs { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-top: 10px; }
.pd-thumbs button { border: 1px solid var(--line); background: var(--paper); padding: 0; cursor: pointer; }
.pd-thumbs button[aria-current="true"] { border: 2px solid var(--ink); }
.pd-thumbs img { aspect-ratio: 1; object-fit: cover; width: 100%; }
.pd-info h1 { font-size: clamp(24px, 5.4vw, 34px); font-weight: 900; }
.pd-catch { margin-top: 10px; color: var(--ink-2); }
.assure { margin-top: 22px; border-top: 1px solid var(--line); }
.assure li { display: grid; grid-template-columns: 7.5em 1fr; gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 14px; line-height: 1.6; }
.assure b { font-weight: 700; }
.colors { margin-top: 22px; }
.colors p { font-size: 14px; font-weight: 700; }
.colors ul { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.colors li { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; border: 1px solid var(--line); padding: 5px 11px 5px 7px; }
.colors li.is-on { border: 2px solid var(--ink); font-weight: 700; }
.colors i { width: 16px; height: 16px; border-radius: 50%; border: 1px solid rgba(0,0,0,.18); }
@media (min-width: 880px) {
  .pd { grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: start; }
  .pd-gallery { position: sticky; top: 84px; }
  .pd-track { margin: 0; }
}
.points { display: grid; gap: 34px; margin-top: 36px; }
.point img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border: 1px solid var(--line); background: var(--white); }
.point h3 { font-size: 19px; margin-top: 16px; }
.point p { color: var(--ink-2); margin-top: 6px; font-size: 15px; }
@media (min-width: 880px) { .points { grid-template-columns: repeat(3, 1fr); gap: 28px; } }
.spec { margin-top: 26px; border-top: 1px solid var(--ink); max-width: 720px; width: 100%; border-collapse: collapse; }
.spec th, .spec td { text-align: left; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 15px; vertical-align: top; }
.spec th { width: 8em; font-weight: 500; color: var(--ink-2); }
.review-img { margin-top: 28px; width: 100%; max-width: 760px; border: 1px solid var(--line); }

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

/* 比較カード：最後の行が1項目だけのときは横幅いっぱいに */
.model dl div:last-child:nth-child(odd) { grid-column: 1 / -1; }

/* ---------- 読み物ページ ---------- */
.article { max-width: 760px; margin: 0 auto; padding: 8px var(--pad) 72px; }
.article h1 { font-size: clamp(27px, 6vw, 40px); font-weight: 900; }
.article .meta { font-size: 13px; color: var(--ink-2); margin-top: 10px; }
.article .intro { margin-top: 20px; font-size: 17px; }
.article h2 { font-size: clamp(21px, 4.4vw, 27px); margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--ink); }
.article h3 { font-size: 18px; margin-top: 30px; }
.article p { margin-top: 14px; }
.article figure { margin-top: 24px; }
.article figure img { width: 100%; border: 1px solid var(--line); background: var(--paper); }
.article figcaption { font-size: 13px; color: var(--ink-2); margin-top: 8px; }
.article .toc { margin-top: 28px; background: var(--paper); padding: 18px 22px; }
.article .toc p { margin: 0; font-weight: 700; font-size: 14px; }
.article .toc ol { list-style: decimal; padding-left: 1.3em; margin-top: 8px; }
.article .toc li { padding: 3px 0; }
.article ol.steps { list-style: none; counter-reset: step; margin-top: 18px; display: grid; gap: 14px; }
.article ol.steps li { counter-increment: step; display: grid; grid-template-columns: 34px 1fr; gap: 12px; }
.article ol.steps li::before { content: counter(step); font: 600 26px/1.3 var(--num); }
.article ul.ticks { margin-top: 16px; }
.article .cmp { width: 100%; border-collapse: collapse; margin-top: 20px; font-size: 14px; }
.article .cmp th, .article .cmp td { border-bottom: 1px solid var(--line); padding: 11px 8px 11px 0; text-align: left; vertical-align: top; }
.article .cmp thead th { border-bottom: 1px solid var(--ink); font-size: 13px; }
.article .cta { margin-top: 40px; border: 2px solid var(--ink); padding: 22px; }
.article .cta h3 { margin-top: 0; }
.article .cta .buy { margin-top: 16px; }
.article .faq { margin-top: 20px; }

/* ---------- 応募フォーム ---------- */
.form { max-width: 640px; margin-top: 28px; display: grid; gap: 20px; }
.inf-field { display: grid; gap: 6px; }
.inf-label { font-weight: 700; font-size: 15px; }
.inf-input { font: 400 16px/1.6 var(--jp); padding: 12px 14px; border: 1px solid var(--steel); border-radius: 2px; background: var(--white); color: var(--ink); width: 100%; }
.inf-input:focus { outline: 3px solid var(--ink); outline-offset: 1px; }
.inf-input--error { border-color: var(--rakuten); }
.inf-error, .form-error { color: var(--rakuten); font-size: 14px; font-weight: 700; }
.inf-btn[disabled] { opacity: .5; cursor: progress; }
.inf-success { display: none; max-width: 640px; margin-top: 28px; border: 2px solid var(--ink); padding: 22px; }
.inf-success--visible { display: block; }