@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Noto+Serif+JP:wght@400;500;600&display=swap');
:root{--paper:#f7f7f4;--ink:#242522;--muted:#696b63;--line:#dcded5;--orange:#c96800;--sun:#ff9000;--serif:'Noto Serif JP','Yu Mincho',serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',-apple-system,'Hiragino Sans',Meiryo,sans-serif}a{color:inherit;text-decoration:none}button,select{font:inherit}a:focus-visible,button:focus-visible,select:focus-visible{outline:3px solid var(--orange);outline-offset:4px}a:hover{color:var(--orange)}.wrap{max-width:1440px;margin:auto;padding:0 64px}.header{min-height:104px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:25px}.brand{display:flex;align-items:center;gap:13px;font-weight:600;letter-spacing:-1px;font-size:27px}.brand .star{font-size:44px;color:var(--sun)}.brand small{font-family:var(--serif);font-size:17px;letter-spacing:3px;border-left:1px solid var(--line);padding-left:15px}nav{display:flex;gap:28px;align-items:center;font-size:13px}.lang{display:flex;gap:9px;margin-left:16px}.lang a[aria-current]{color:var(--orange);text-decoration:underline;text-underline-offset:6px}.eyebrow,.mono{font-family:ui-monospace,monospace;font-size:11px;letter-spacing:.12em}.eyebrow{color:var(--muted)}.hero{padding-top:31px}.hero-top{display:flex;justify-content:space-between}.hero-title{display:flex;justify-content:space-between;align-items:end;margin:38px 0 30px;gap:30px}.hero h1{font-family:var(--serif);font-size:clamp(62px,8vw,112px);font-weight:400;letter-spacing:.1em;line-height:1.25;margin:0}.hero h1 span{color:var(--orange)}.hero-aside{max-width:270px;font-size:14px;line-height:1.9}.hero-aside strong{display:block;font-size:19px;margin-bottom:11px;font-weight:500}.hero-photo{height:490px;position:relative;overflow:hidden}.hero-photo img{width:100%;height:100%;object-fit:cover;object-position:50% 48%;display:block}.photo-label{position:absolute;bottom:15px;right:17px;background:var(--paper);color:var(--ink);font-size:11px;letter-spacing:.06em;padding:7px 11px}.photo-label.dark{background:var(--ink);color:var(--paper)}.vertical{position:absolute;top:24px;left:27px;writing-mode:vertical-rl;font-family:var(--serif);font-size:24px;letter-spacing:.24em;color:#fff;text-shadow:0 1px 10px #242522}.hero-foot{display:flex;justify-content:space-between;padding:18px 0;border-bottom:1px solid var(--line);font-size:11px;letter-spacing:.05em}.section{padding:84px 0}.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:32px;gap:20px}.section-head h2{font-family:var(--serif);font-size:36px;font-weight:400;margin:8px 0 0;letter-spacing:.08em}.section-head p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}.num{color:var(--orange);margin-right:16px}.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}.filters button{padding:9px 18px;border:1px solid var(--line);border-radius:0;background:transparent;cursor:pointer;font-size:13px}.filters button.active{background:var(--ink);color:var(--paper);border-color:var(--ink)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:34px 24px}.card{display:block}.card figure{margin:0;height:276px;position:relative;background:#ebece5;overflow:hidden}.card img{width:100%;height:100%;object-fit:cover;transition:transform .6s}.card:hover img{transform:scale(1.04)}.placeholder{height:100%;display:grid;place-content:center;text-align:center;gap:13px;background:linear-gradient(120deg,#e7e9e0,#f2f2ed);color:var(--muted)}.placeholder .kanji{font-family:var(--serif);font-size:38px;letter-spacing:.18em;color:var(--ink)}.placeholder small{font-size:11px}.card-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;padding-top:17px;letter-spacing:.06em}.card h3{font-family:var(--serif);font-weight:500;font-size:24px;margin:10px 0}.card p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}.arrow{font-family:sans-serif;color:var(--orange);float:right}.dark-section{background:var(--ink);color:var(--paper);padding:70px 0}.dark-section .eyebrow,.dark-section .section-head p{color:#bbbdb3}.guide-box{display:grid;grid-template-columns:.85fr 1.4fr;gap:60px}.guide-controls{border-top:1px solid #54564e;padding-top:22px}.guide-controls label{display:block;font-size:13px;margin:0 0 10px}.guide-controls select{display:block;width:100%;background:transparent;color:var(--paper);border:1px solid #74776c;padding:14px;margin-bottom:24px}.guide-controls option{background:var(--ink)}.guide-result{padding:28px 32px;border:1px solid #54564e}.guide-result h3{font-family:var(--serif);font-size:29px;font-weight:400;margin:9px 0 18px}.guide-result p{font-size:14px;line-height:1.9;color:#ced0c5}.guide-result a{display:block;border-top:1px solid #54564e;padding:14px 0;font-size:15px}.guide-result a span{float:right;color:var(--sun)}.note{font-size:12px!important;color:var(--muted);line-height:1.9}.dark-section .note{color:#bbbdb3}.tool-feature{display:grid;grid-template-columns:1.3fr 1fr;gap:45px;align-items:center}.tool-feature figure{position:relative;margin:0}.tool-feature img{width:100%;display:block}.tool-feature h3{font-family:var(--serif);font-size:34px;font-weight:400;margin:20px 0}.tool-feature p{font-size:14px;line-height:2;color:var(--muted)}.text-link{display:inline-block;border-bottom:1px solid var(--ink);padding:12px 0;margin-top:12px;font-size:14px}.manifesto{border-top:1px solid var(--line);padding:55px 0 68px;display:grid;grid-template-columns:1fr 1.25fr;gap:65px}.manifesto h2{font-family:var(--serif);font-size:38px;font-weight:400;line-height:1.7;margin:0}.manifesto p{line-height:2;font-size:14px;color:var(--muted)}footer{border-top:1px solid var(--line);padding:27px 0;display:flex;justify-content:space-between;gap:25px;font-size:11px;color:var(--muted)}.breadcrumb{padding-top:28px;font-size:12px;color:var(--muted)}.detail-head{padding:60px 0 35px}.detail-head h1{font-family:var(--serif);font-weight:400;font-size:clamp(40px,5vw,70px);line-height:1.5;margin:18px 0}.detail-head .lead{font-size:20px;line-height:1.8;max-width:850px}.detail-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:44px;margin-bottom:70px}.detail-photo{height:510px;position:relative;background:#eceee6;margin:0}.detail-photo img{width:100%;height:100%;object-fit:cover}.spec{margin:0}.spec div{border-top:1px solid var(--line);padding:18px 0;display:grid;grid-template-columns:1fr 1.2fr;gap:20px;font-size:14px}.spec dt{color:var(--muted)}.spec dd{margin:0}.article{max-width:850px;margin:0 auto;padding:0 0 60px}.article h2{font-family:var(--serif);font-weight:400;font-size:29px;margin:40px 0 18px}.article p{line-height:2.1;font-size:16px;color:var(--muted)}.related{border-top:1px solid var(--line);padding:35px 0;display:flex;justify-content:space-between}.status{display:inline-block;background:#e9ebe2;padding:6px 10px;font-size:11px;color:var(--muted)}.skip{position:absolute;top:-90px}.skip:focus{top:5px;left:5px;background:var(--paper);padding:15px;z-index:20}[hidden]{display:none!important}@media(max-width:1000px){.wrap{padding:0 32px}.hero-photo{height:400px}.grid{grid-template-columns:repeat(2,1fr)}.header{flex-wrap:wrap;padding:20px 0}.guide-box{gap:30px}.hero h1{font-size:76px}.detail-layout{grid-template-columns:1.25fr 1fr}.detail-photo{height:420px}}@media(max-width:650px){.wrap{padding:0 22px}.header{gap:17px}.brand{font-size:24px}nav{width:100%;justify-content:space-between;gap:12px;font-size:12px}.lang{margin-left:0}.hero-top span:last-child{display:none}.hero-title{display:block;margin:31px 0 25px}.hero h1{font-size:64px}.hero-aside{max-width:none;margin-top:23px}.hero-aside strong{font-size:17px}.hero-photo{height:330px}.vertical{font-size:17px;left:17px}.hero-foot span:last-child{display:none}.section{padding:55px 0}.section-head{display:block}.section-head h2{font-size:30px}.section-head p{margin-top:15px}.grid{grid-template-columns:1fr}.card figure{height:290px}.guide-box,.tool-feature,.manifesto,.detail-layout{grid-template-columns:1fr;gap:25px}.guide-result{padding:22px}.manifesto h2{font-size:31px}footer{flex-wrap:wrap;line-height:1.8}.detail-head{padding-top:38px}.detail-head h1{font-size:38px}.detail-photo{height:370px}.detail-head .lead{font-size:18px}.related{gap:20px;font-size:13px}.hero h1.en{font-size:55px}.filters{gap:7px}.filters button{padding:8px 12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.card img{transition:none}}

/* Owner's practical use photograph, uncropped to preserve the full scene. */
.usage-note{margin:64px 0 70px;border-top:1px solid var(--line);padding-top:38px}.usage-photo{position:relative;margin:0}.usage-photo img{display:block;width:100%;height:auto}.usage-copy{max-width:850px;margin:32px auto 0}.usage-copy h2{font-family:var(--serif);font-weight:400;font-size:clamp(25px,3vw,37px);line-height:1.6;margin:16px 0}.usage-copy p{font-size:16px;color:var(--muted);line-height:2.1}@media(max-width:650px){.usage-note{margin:42px 0;padding-top:26px}.usage-copy p{font-size:15px}}

.detail-photo.gensen-main{height:auto;align-self:start}.detail-photo.gensen-main img{height:auto;object-fit:contain}

.category-nav{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 30px}.category-nav a{border:1px solid var(--line);padding:9px 16px;font-size:13px}.category-nav a[aria-current]{background:var(--ink);color:var(--paper);border-color:var(--ink)}.collection-group{margin-bottom:48px}.collection-group>h3{font-family:var(--serif);font-weight:400;font-size:26px;border-top:1px solid var(--line);padding-top:24px;margin:0 0 24px}.breadcrumb{display:flex;justify-content:flex-start;flex-wrap:wrap;gap:9px;line-height:1.8}.breadcrumb [aria-current]{color:var(--ink)}

.card-steel{color:var(--orange);font-size:12px;line-height:1.7;margin-top:10px;letter-spacing:.03em}

/* Demo context uses the existing space immediately above the header rule. */
.header{position:relative}.header-demo{position:absolute;inset-inline:0;bottom:7px;margin:0;color:var(--muted);font-size:10px;font-weight:400;line-height:1.5;letter-spacing:.02em;overflow-wrap:anywhere}@media(max-width:1000px){.header{padding-bottom:40px}.header-demo{bottom:8px}}@media(max-width:650px){.header{padding-bottom:55px}.header-demo{font-size:10px}}

.card-meta{gap:8px 14px;flex-wrap:wrap}.card-meta .steel-name{color:var(--orange)}.steel-badge{display:inline-block;background:#e9ebe2;padding:6px 10px;font-size:12px;line-height:1.6;color:var(--orange)}

.brand .star{display:inline-flex;align-items:center;justify-content:center;flex:none;width:44px;height:44px;line-height:1}.brand .star svg{display:block;width:100%;height:100%}.parent-site{color:var(--muted);font-size:12px;white-space:nowrap}@media(max-width:650px){.brand .star{width:38px;height:38px}.parent-site{font-size:11px}}

.home-collection{grid-template-columns:repeat(2,minmax(0,1fr))}@media(max-width:650px){.home-collection{grid-template-columns:1fr}}