/* 本人指定：白・青灰色、全てゴシック体。外部フォント・装飾用ライブラリなし。 */
:root{--paper:#fff;--ink:#202e3b;--muted:#5c6d7c;--line:#dce4eb;--panel:#f3f6f9;--accent:#245774;--blue:#dcecf4;--radius:8px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Yu Gothic Medium","YuGothic","Meiryo",sans-serif;-webkit-text-size-adjust:100%}a{color:var(--accent);text-underline-offset:.23em}a:hover{text-decoration-thickness:2px}a:focus-visible,button:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:3px solid #367ca4;outline-offset:5px}img{display:block;max-width:100%;height:auto}button,input{font:inherit}svg text{font-family:inherit;fill:var(--ink)}
.site-header,.site-footer{width:min(100% - 56px,1120px);margin-inline:auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:25px 0;border-bottom:1px solid var(--line)}.site-name{display:flex;align-items:center;gap:12px;color:var(--ink);font-weight:700;font-size:23px;letter-spacing:.06em;text-decoration:none;white-space:nowrap}.site-name::before{content:"";width:34px;height:34px;background:url('/assets/mark.svg') center/contain no-repeat}.site-header nav{display:flex;flex-wrap:wrap;gap:8px 24px;font-size:14px}.site-header nav a{display:inline-flex;align-items:center;min-height:44px;color:var(--muted);text-decoration:none;border-bottom:2px solid transparent;transition:color .18s,border-color .18s}.site-header nav a:hover,.site-header nav a[aria-current=page]{color:var(--accent);border-color:var(--accent)}
.skip{position:absolute;z-index:5;left:12px;top:-70px;background:#fff;padding:10px}.skip:focus{top:10px}.post-body{width:min(100% - 48px,760px);margin-inline:auto;padding:55px 0 80px;font-size:17px;line-height:1.95;letter-spacing:.015em;overflow-wrap:anywhere}.post-body h1,.post-body h2,.post-body h3{font-family:inherit;color:var(--ink);font-weight:700}.post-body h1{font-size:34px;line-height:1.55;letter-spacing:.015em;margin:0 0 25px;text-wrap:pretty}.post-body h2{font-size:23px;line-height:1.6;margin:50px 0 21px;scroll-margin-top:24px}.post-body h2::before{content:"";display:block;width:32px;border-top:3px solid #71a2bc;margin-bottom:14px}.post-body p{margin:0 0 24px}.post-body ul{padding-left:1.3em;margin:22px 0 30px}.post-body li{margin:7px 0}.eyebrow,.section-label{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--accent)}.post-body .article-kicker{margin-bottom:17px}.quick-link{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-size:14px;font-weight:600;text-decoration:none;margin:0 0 22px}.quick-link::after{content:'↓';transition:transform .18s}.quick-link:hover::after{transform:translateY(3px)}
.post-body figure{margin:32px 0 40px;background:var(--panel);padding:24px;border-radius:var(--radius)}.post-body figure svg{display:block;width:100%;height:auto;max-height:300px;margin:auto}.post-body figcaption{font-size:12px;line-height:1.8;color:var(--muted);margin-top:14px}.post-body .article-photo{padding:0;background:none;margin:0 0 35px}.article-photo img{width:100%;height:240px;object-fit:cover;border-radius:var(--radius)}.article-photo.storage img{object-position:50% 55%}.article-photo.packing img{object-position:50% 48%}.post-body .article-photo figcaption{margin-top:9px}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);margin:24px 0}.post-body table{border-collapse:collapse;min-width:560px;width:100%;font-size:14px;font-variant-numeric:tabular-nums}.post-body th,.post-body td{padding:14px 15px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.post-body tr:last-child td{border:0}.post-body th{background:var(--panel);font-weight:700}.table-hint{display:none}.post-body .sources{font-size:13px;line-height:1.9;color:var(--muted)}
.calculator{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:28px;margin:30px 0;scroll-margin-top:24px}.calculator fieldset{border:0;padding:0;margin:0 0 25px;min-width:0}.calculator legend{font-weight:700;font-size:15px;margin-bottom:12px}.dimension-fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.dimension-fields label{font-size:13px;display:block}.calculator input{display:block;width:100%;min-width:0;font-size:19px;font-variant-numeric:tabular-nums;padding:12px 10px;border:1px solid #aab9c5;border-radius:5px;background:#fff;color:var(--ink);margin-top:6px;transition:border-color .18s,box-shadow .18s}.calculator input:hover{border-color:var(--accent)}.calculator input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #24577414}.calculator button,.button-link{display:inline-flex;align-items:center;justify-content:center;gap:12px;background:var(--accent);color:#fff;border:1px solid var(--accent);border-radius:5px;padding:13px 22px;min-height:50px;font-size:15px;font-weight:700;text-decoration:none;cursor:pointer;transition:background .18s,transform .18s,box-shadow .18s}.calculator button:hover,.button-link:hover{background:#183e55;transform:translateY(-2px);box-shadow:0 5px 15px #1d4d6a1c}.calculator button:active,.button-link:active{transform:translateY(0)}.calculation-result{background:#fff;border-radius:6px;border:1px solid var(--line);padding:18px 20px;margin-top:24px;font-variant-numeric:tabular-nums;font-size:15px}.calculation-result p{margin:6px 0}.calculation-result[data-state]{animation:result-in .28s ease-out}.calculation-result[data-state] p:first-child{font-weight:700}.calculation-result[data-state=short]{border-left:4px solid var(--accent)}.calculation-result[data-state=error]{border-left:4px solid #a52c40}.calculation-result[data-state=room]{border-left:4px solid #2d6e70}
.home .post-body{width:min(100% - 56px,1120px);padding-top:46px}.home-hero{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;margin-bottom:56px}.home-hero h1{font-size:clamp(34px,3.7vw,48px);line-height:1.5;letter-spacing:.01em;margin:17px 0 23px}.home-hero .intro{font-size:16px;color:var(--muted);max-width:470px}.home .hero-media{margin:0;padding:0;background:none;position:relative}.hero-media img{aspect-ratio:1/1;object-fit:cover;border-radius:10px}.hero-media::before{content:"";position:absolute;width:62px;height:62px;top:15px;left:15px;border-top:2px solid #ffffffc9;border-left:2px solid #ffffffc9;pointer-events:none}.hero-media::after{content:"";position:absolute;width:62px;height:62px;bottom:15px;right:15px;border-bottom:2px solid #ffffffc9;border-right:2px solid #ffffffc9;pointer-events:none}.home-section-title{display:flex;align-items:baseline;gap:20px;border-bottom:1px solid var(--line);padding-bottom:17px;margin-bottom:26px}.home-section-title h2{font-size:21px;margin:0}.home-section-title h2::before{display:none}.home-section-title span{font-size:13px;color:var(--muted)}.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px}.story{padding-bottom:28px;border-bottom:1px solid var(--line)}.story-photo{display:block;overflow:hidden;border-radius:var(--radius);margin-bottom:22px}.story-photo img{width:100%;aspect-ratio:16/8;object-fit:cover;transition:transform .4s ease}.story-photo:hover img{transform:scale(1.035)}.story h2{font-size:24px;margin:12px 0 16px}.story h2::before{display:none}.story h2 a{color:var(--ink);text-decoration:none}.story h2 a:hover{color:var(--accent)}.story p{font-size:15px;color:var(--muted)}.story .section-label{font-size:12px;color:var(--accent);margin-bottom:10px}.story-link{display:inline-flex;gap:10px;align-items:center;min-height:44px;font-size:15px;font-weight:700;text-decoration:none}.story-link span{transition:transform .18s}.story-link:hover span{transform:translateX(5px)}.home .editorial-note{margin-top:32px;padding:20px 0 0;font-size:13px;color:var(--muted)}.site-footer{border-top:1px solid var(--line);padding:28px 0 38px;font-size:12px;color:var(--muted);line-height:1.9}.site-footer p{margin:0 0 9px}
@keyframes result-in{from{opacity:.4;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes page-in{from{opacity:.4;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:no-preference){.home-hero,.article-kicker{animation:page-in .45s ease-out}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
@media(max-width:800px){.site-header{align-items:flex-start;flex-direction:column;gap:10px;padding:20px 0 10px}.site-header nav{gap:4px 22px}.home-hero{gap:28px}.home-hero h1{font-size:32px}.home-hero .intro{font-size:15px}.story-grid{gap:25px}.story h2{font-size:21px}}
@media(max-width:600px){.site-header,.site-footer,.home .post-body{width:calc(100% - 36px)}.site-name{font-size:21px}.site-header nav{font-size:13px}.post-body{width:calc(100% - 36px);padding:34px 0 55px;font-size:16px;line-height:1.95}.post-body h1{font-size:26px;line-height:1.6;margin-bottom:18px}.post-body h2{font-size:21px;margin-top:38px}.post-body figure{padding:18px 12px}.home .post-body{padding-top:29px}.home-hero{grid-template-columns:1fr;gap:25px;margin-bottom:38px}.home-hero h1{font-size:35px;margin-top:13px}.home-hero .intro{max-width:none;margin-bottom:20px}.hero-media img{aspect-ratio:16/9}.story-grid{grid-template-columns:1fr;gap:30px}.story h2{font-size:23px}.home-section-title{gap:12px}.home-section-title span{font-size:12px}.calculator{padding:20px 14px}.dimension-fields{gap:9px}.dimension-fields label{font-size:12px}.calculator input{padding:11px 7px;font-size:18px}.calculator legend{font-size:14px}.calculator button{width:100%;font-size:14px;padding:13px 10px}.calculation-result{padding:14px 12px}.article-photo img{height:195px}.table-hint{display:block;font-size:12px;color:var(--muted);margin-bottom:6px!important}.table-scroll{margin-top:0}.post-body th,.post-body td{padding:12px}.home-section-title h2{font-size:20px}.site-footer{padding-top:24px}}
@media print{.site-header nav,.quick-link,.button-link{display:none}.site-header,.post-body,.site-footer{width:100%;padding-top:10px}.post-body figure,.calculator{break-inside:avoid}.calculator input{border-color:#aaa}.site-footer{padding-bottom:0}.home-hero,.story-grid{display:block}a{color:inherit}.article-photo img{height:160px}}