:root{--ui-font-size:15px;--ui-page-width:1120px;--ui-page-width-narrow:680px;--ui-page-padding-y:68px;--ui-header-margin-bottom:42px;--ui-section-gap:22px;--ui-card-padding:21px;--ui-card-min-height:210px;--ui-card-radius:10px;--ui-panel-padding:24px;--ui-control-padding-y:10px;--ui-button-padding-y:12px;--ui-input-unit-width:82px;--ui-control-gap:10px;--ui-hero-title-min:2.15rem;--ui-hero-title-max:4.35rem;--ui-page-title-min:1.9rem;--ui-page-title-max:3.1rem;--ui-card-title:1.2rem;--ui-eyebrow-size:.75rem;--ui-description-size:.95rem;--ui-meta-size:.8rem;color:#0f172a;font-synthesis:none;text-rendering:optimizelegibility;background:#fff;font-family:BIZ UDPGothic,Yu Gothic,Meiryo,sans-serif}*{box-sizing:border-box}html{font-size:var(--ui-font-size);background:#fff}body{min-width:320px;min-height:100vh;margin:0}button,input,select{font:inherit}@media (width<=600px){:root{--ui-font-size:14px;--ui-page-width:calc(100% - 28px);--ui-page-width-narrow:calc(100% - 28px);--ui-page-padding-y:48px;--ui-header-margin-bottom:32px;--ui-section-gap:18px;--ui-card-padding:18px;--ui-card-min-height:0;--ui-panel-padding:20px;--ui-control-padding-y:9px;--ui-button-padding-y:11px;--ui-input-unit-width:74px;--ui-control-gap:8px}}.tool-card{min-height:var(--ui-card-min-height);padding:var(--ui-card-padding);border-radius:var(--ui-card-radius);background:#fff;border:1px solid #dce4ee;flex-direction:column;transition:transform .2s,box-shadow .2s;display:flex;position:relative;box-shadow:0 4px 18px #11274b0f}.tool-card:hover{transform:translateY(-3px);box-shadow:0 10px 28px #154d9e1f}.tool-card--featured{border-color:#72a7ed;box-shadow:0 4px 20px #1b63d61c}.tool-card__featured{color:#fff;letter-spacing:.08em;background:#2466e3;border-radius:999px;padding:4px 10px;font-size:.68rem;font-weight:700;position:absolute;top:-10px;right:16px}.tool-card__meta{color:#64748b;font-size:var(--ui-meta-size);justify-content:space-between;gap:10px;margin-bottom:12px;display:flex}.tool-card h2{color:#0f172a;font-size:var(--ui-card-title);margin:0 0 12px}.tool-card p{color:#475569;flex-grow:1;margin:0 0 20px;line-height:1.7}.tool-card__link{padding:var(--ui-control-padding-y) 14px;color:#fff;background:#215ecf;border-radius:8px;align-self:flex-start;font-weight:700;text-decoration:none}.tool-card__link:hover{background:#2563eb}.tool-card__link--disabled{color:#64748b;cursor:default;pointer-events:none;background:#e2e8f0}.numeric-field{margin-bottom:14px}.calculator-panel .numeric-field>label{color:#334155;margin-bottom:6px;font-weight:700;display:block}.numeric-field__row{grid-template-columns:minmax(0,1fr) 72px;gap:8px;display:grid}.numeric-field__row .input-with-unit{margin-top:0}.calculator-panel .numeric-field__trigger{color:#1555bd;background:#e8f0ff;width:72px;padding:8px 4px;font-size:.85rem}.calculator-panel .numeric-field__trigger:hover{background:#d8e8ff}.calculator-dialog{color:#0f172a;background:#fff;border:1px solid #cbd5e1;border-radius:16px;width:min(360px,100% - 24px);max-height:calc(100dvh - 24px);padding:20px;box-shadow:0 18px 60px #0f172a47}.calculator-dialog::backdrop{background:#0f172a85}.calculator-dialog__header{justify-content:space-between;gap:12px;margin-bottom:14px;display:flex}.calculator-dialog__header h2{margin:0;font-size:1.2rem}.calculator-dialog__header p{color:#64748b;margin:5px 0 0;font-size:.85rem}.calculator-dialog button{cursor:pointer;border:0;border-radius:9px;font-weight:700}.calculator-dialog__close{color:#334155;background:#f1f5f9;align-self:flex-start;min-width:36px;min-height:36px;font-size:1.3rem}.calculator-dialog__display{overflow-wrap:anywhere;text-align:right;font-variant-numeric:tabular-nums;background:#f8fafc;border:1px solid #cbd5e1;border-radius:10px;min-height:62px;padding:12px;font-size:1.7rem;display:block}.calculator-dialog__error{color:#b91c1c;margin:8px 0 0;font-size:.85rem}.calculator-dialog__keys{grid-template-columns:repeat(4,1fr);gap:8px;margin:14px 0;display:grid}.calculator-dialog__keys button{color:#0f172a;background:#f1f5f9;min-height:48px;font-size:1.1rem}.calculator-dialog__keys button:hover,.calculator-dialog__close:hover{background:#dbeafe}.calculator-dialog__keys .calculator-dialog__key--function{color:#1555bd;background:#e8f0ff}.calculator-dialog__apply{color:#fff;background:#215ecf;width:100%;min-height:48px}.calculator-dialog__apply:hover{background:#2563eb}.calculator-dialog button:focus-visible,.numeric-field__trigger:focus-visible{outline-offset:2px;outline:3px solid #1d4ed8}@media (width<=360px){.calculator-dialog{padding:14px}}.calculator-page{width:min(var(--ui-page-width), calc(100% - 48px));margin:0 auto;padding:46px 0 76px}.back-link{color:#2563eb;margin-bottom:26px;text-decoration:none;display:inline-block}.calculator-page header{max-width:var(--ui-page-width-narrow);margin-bottom:34px}.calculator-page header h1{color:#0f172a;font-size:clamp(var(--ui-page-title-min), 4.6vw, var(--ui-page-title-max));margin:0 0 14px}.calculator-page header p{color:#475569;line-height:1.8}.calculator-note{color:#2563eb;margin-top:10px;font-weight:700}.calculator-layout{gap:var(--ui-section-gap);grid-template-columns:minmax(300px,1fr) minmax(300px,1fr);display:grid}.calculator-panel,.result-panel,.assumption-panel{padding:var(--ui-panel-padding);border-radius:var(--ui-card-radius);background:#fff;border:1px solid #dce4ee;box-shadow:0 4px 18px #11274b0f}.calculator-panel h2,.result-panel h2,.assumption-panel h2{margin-top:0}.calculator-panel label{color:#334155;margin-bottom:14px;font-weight:700;display:block}.input-with-unit{grid-template-columns:1fr var(--ui-input-unit-width);border:1px solid #cbd5e1;border-radius:8px;align-items:center;margin-top:6px;display:grid;overflow:hidden}.input-with-unit:focus-within{border-color:#2563eb;box-shadow:0 0 0 3px #2563eb1f}.input-with-unit input{width:100%;padding:var(--ui-control-padding-y);border:0;outline:0;font-size:.95rem}.input-with-unit span{padding:var(--ui-control-padding-y);color:#475569;text-align:center;font-size:var(--ui-meta-size);background:#f1f5f9}.calculator-panel button{width:100%;padding:var(--ui-button-padding-y);color:#fff;cursor:pointer;background:#215ecf;border:0;border-radius:8px;font-weight:800}.calculator-panel button:hover{background:#2563eb}.result-placeholder{color:#64748b}.result-list{margin:0}.result-list div{border-bottom:1px solid #e2e8f0;justify-content:space-between;gap:16px;padding:14px 0;display:flex}.result-list dt{color:#475569}.result-list dd{color:#0f172a;text-align:right;margin:0;font-weight:800}.error-message,.warning-message{border-radius:8px;padding:12px}.error-message{color:#b91c1c;background:#fef2f2}.warning-message{color:#9a3412;background:#fff7ed;margin-top:16px;line-height:1.7}.assumption-panel{margin-top:22px}.assumption-panel li{color:#475569;margin-bottom:6px}@media (width<=760px){.calculator-page{width:var(--ui-page-width)}.calculator-layout{grid-template-columns:1fr}}.decision-chip{border-radius:999px;align-items:center;padding:6px 10px;font-weight:800;display:inline-flex}.decision-chip--acceptable{color:#047857;background:#ecfdf5}.decision-chip--excess{color:#b91c1c;background:#fef2f2}@media (width<=600px){.decision-chip{padding:5px 9px}}.calculator-layout--mass{grid-template-columns:minmax(320px,1fr) minmax(320px,1fr)}.select-field{width:100%;padding:var(--ui-control-padding-y);color:#0f172a;background:#fff;border:1px solid #cbd5e1;border-radius:8px;margin-top:6px}.select-field:focus{border-color:#2563eb;outline:none;box-shadow:0 0 0 3px #2563eb1f}.shape-description,.shape-hint,.result-note,.material-note{color:#475569;margin:12px 0 0;line-height:1.7}.shape-inputs{gap:14px;margin-top:18px;display:grid}.material-note{background:#f8fafc;border-radius:8px;padding:12px}.material-note p{margin:0}.material-note p+p{margin-top:6px}@media (width<=760px){.calculator-layout--mass{grid-template-columns:1fr}}#root{flex-direction:column;min-height:100vh;display:flex}.site-container{width:min(1180px,100% - 48px);margin:0 auto}.site-header{background:#fff}.site-header__bar{color:#fff;letter-spacing:.025em;background:#245ed2;padding:4px 0;font-size:.72rem;font-weight:700}.site-header__main{justify-content:space-between;align-items:center;gap:24px;min-height:72px;display:flex}.site-brand{flex:none;align-items:center;text-decoration:none;display:inline-flex}.site-brand__image{object-fit:cover;object-position:center;filter:contrast(1.1);width:205px;height:48px;display:block}.site-nav{align-self:stretch;align-items:stretch;gap:4px;display:flex}.site-nav a{color:#172c4e;white-space:nowrap;border-bottom:2px solid #0000;align-items:center;padding:0 15px;font-size:.88rem;text-decoration:none;display:inline-flex}.site-nav a:hover,.site-nav a:focus-visible{color:#125aca;border-bottom-color:#2466e3}.breadcrumbs{color:#596579;background:#f8f9fb;border-top:1px solid #edf0f4;border-bottom:1px solid #e7ebf0;font-size:.76rem}.breadcrumbs__inner{white-space:nowrap;align-items:center;gap:9px;min-height:34px;display:flex;overflow:hidden}.breadcrumbs__inner>span:last-child{text-overflow:ellipsis;overflow:hidden}.breadcrumbs a{color:#344665;text-decoration:none}.breadcrumbs a:hover{color:#125aca;text-decoration:underline}.app{width:min(var(--ui-page-width), calc(100% - 48px));padding:var(--ui-page-padding-y) 0 80px;margin:0 auto}.page-intro{max-width:900px;margin-bottom:58px}.page-intro--category{margin-bottom:52px}.app__eyebrow,.section-heading__eyebrow{color:#1767df;font-size:var(--ui-eyebrow-size);letter-spacing:.15em;margin:0 0 10px;font-weight:800}.page-intro h1{color:#122444;margin:0 0 15px;font-size:clamp(2rem,5vw,3.4rem);line-height:1.22}.page-intro>p:last-child{color:#4a5b72;max-width:720px;margin:0;font-size:1rem;line-height:1.9}.catalog-section+.catalog-section{margin-top:64px}.section-heading{border-bottom:1px solid #dbe1e9;justify-content:space-between;align-items:end;gap:20px;margin-bottom:26px;display:flex}.section-heading h2{color:#132744;border-bottom:2px solid #2466e3;margin:0 0 -1px;padding:0 16px 10px 0;font-size:1.35rem;display:inline-block}.section-heading>span{color:#64748b;white-space:nowrap;padding-bottom:12px;font-size:.82rem}.category-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px;display:grid}.category-card{min-height:232px;color:inherit;background:#fff;border:1px solid #dce4ee;border-radius:10px;gap:22px;padding:26px;text-decoration:none;transition:border-color .18s,box-shadow .18s,transform .18s;display:flex;box-shadow:0 4px 18px #11274b0f}.category-card:hover,.category-card:focus-visible{border-color:#76a8f0;transform:translateY(-3px);box-shadow:0 10px 28px #154d9e1f}.category-card__symbol{color:#1767df;background:#e9f2ff;border-radius:12px;flex:none;justify-content:center;align-items:center;width:64px;height:64px;font-size:1.35rem;font-weight:800;display:flex}.category-card__content{flex-direction:column;align-items:start;display:flex}.category-card__count{color:#1767df;margin:2px 0 9px;font-size:.75rem;font-weight:700}.category-card strong{color:#132744;font-size:1.32rem}.category-card__description{color:#536279;margin:12px 0 22px;font-size:.9rem;line-height:1.7}.category-card__action{color:#125aca;margin-top:auto;font-size:.9rem;font-weight:800}.category-card__action span{margin-left:6px}.tool-grid{gap:var(--ui-section-gap);grid-template-columns:repeat(auto-fit,minmax(280px,1fr));display:grid}.app__empty{color:#536279;text-align:center;border:1px dashed #9fb8d9;border-radius:10px;padding:32px}.site-footer{color:#5e6b7e;background:#f8fafd;border-top:1px solid #e2e8f0;margin-top:auto;font-size:.82rem}.site-footer__inner,.site-footer__inner>div{align-items:center;gap:24px;display:flex}.site-footer__inner{justify-content:space-between;padding:26px 0}.site-footer a{color:#365579;text-decoration:none}.site-footer a:hover{color:#125aca;text-decoration:underline}@media (width<=720px){.site-container,.app{width:calc(100% - 32px)}.site-header__main{flex-wrap:wrap;gap:8px;min-height:auto;padding-top:13px}.site-nav{width:100%;overflow-x:auto}.site-nav a{min-height:44px;padding:0 12px}.site-nav a:first-child{padding-left:0}.app{padding:42px 0 64px}.page-intro{margin-bottom:42px}.category-card{min-height:0;padding:22px}.site-footer__inner{flex-direction:column;align-items:start;gap:12px}}@media (width<=420px){.category-card{gap:15px}.category-card__symbol{width:52px;height:52px;font-size:1.12rem}}