:root{--paper:#f3f6f4;--ink:#173a30;--accent:#235b46;--muted:#51645a;--line:#b8cbbf;--wash:#e7eee8;font-family:"Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;line-height:1.8;}
html{scroll-behavior:smooth;scroll-padding-top:24px;background:var(--paper);color:var(--ink);color-scheme:light;}
body{margin:0;min-height:100dvh;background:var(--paper);color:var(--ink);font-family:inherit;font-size:16px;}
*,*:before,*:after{box-sizing:border-box;}
a{color:inherit;text-underline-offset:.24em;text-decoration-thickness:1px;}
button,input,select,textarea{font:inherit;}
button,a,input,select,textarea{ -webkit-tap-highlight-color:transparent;}
button{cursor:pointer;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:4px;}
button:disabled{cursor:default;opacity:.65;}
h1,h2,h3,p{margin:0;}
h1,h2,h3{font-weight:700;line-height:1.55;letter-spacing:.015em;}
.wrap{width:min(1160px,calc(100% - 80px));margin-inline:auto;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.skip{position:fixed;top:8px;left:12px;transform:translateY(-150%);z-index:20;background:var(--ink);color:white;padding:12px;}
.skip:focus{transform:none;}
.masthead{height:102px;display:flex;align-items:center;justify-content:space-between;gap:28px;border-bottom:2px solid var(--ink);}
.wordmark{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:22px;font-weight:700;letter-spacing:.08em;}
.wordmark small{display:block;font-size:10px;color:var(--muted);font-weight:500;letter-spacing:.04em;margin-top:2px;}
.masthead nav{display:flex;gap:27px;font-size:13px;font-weight:700;}
.masthead nav a{text-decoration:none;border-bottom:1px solid transparent;}
.masthead nav a:hover{border-color:var(--ink);}
.disclosure{font-size:11px;color:var(--muted);padding-block:12px;line-height:1.7;}
.hero{padding-top:50px;padding-bottom:90px;display:grid;grid-template-columns:1fr 1.03fr;gap:68px;align-items:center;}
.hero-copy{padding-bottom:24px;}
.eyebrow{font-size:12px;letter-spacing:.12em;margin-bottom:21px;}
.hero h1{font-size:clamp(34px,4.6vw,58px);line-height:1.5;letter-spacing:.015em;font-weight:750;}
.hero-intro{margin-top:22px;font-size:15px;line-height:2.1;color:var(--muted);}
.hero-stamp{display:inline-flex;align-items:center;justify-content:space-between;gap:50px;margin-top:34px;background:var(--ink);color:var(--paper);padding:15px 22px;border:1px solid var(--ink);text-decoration:none;font-size:14px;font-weight:700;transition:transform .18s,box-shadow .18s;box-shadow:4px 4px 0 #b8cbbf;}
.hero-stamp:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 #b8cbbf;}
.hero-stamp:active{transform:translate(2px,2px);box-shadow:1px 1px 0 #b8cbbf;}
.working-sheet{background:#fbfcfb;border:1px solid var(--line);padding:26px 28px 20px;box-shadow:8px 8px 0 var(--wash);position:relative;}
.sheet-title{font-size:10px;letter-spacing:.04em;color:var(--muted);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:13px;}
.sheet-count{font:12px ui-monospace,monospace;}
.working-sheet h2{font-size:23px;margin:17px 0 3px;}
.sheet-intro{font-size:11px;color:var(--muted);margin-bottom:15px;}
.working-sheet fieldset{border:0;padding:0;margin:0;}
.check-row{display:flex;align-items:flex-start;gap:11px;padding:11px 0;border-bottom:1px solid #dce5df;font-size:12px;line-height:1.8;cursor:pointer;}
.check-row input{width:16px;height:16px;flex:none;margin:3px 0 0;accent-color:var(--accent);}
.check-row:has(input:checked) span{color:var(--muted);text-decoration:line-through;}
.sheet-bottom progress{appearance:none;width:100%;height:3px;border:0;margin:16px 0 5px;background:var(--wash);}
.sheet-bottom progress::-webkit-progress-bar{background:var(--wash);}
.sheet-bottom progress::-webkit-progress-value{background:var(--accent);}
.sheet-bottom progress::-moz-progress-bar{background:var(--accent);}
.sheet-bottom p{font-size:10px;color:var(--muted);min-height:18px;}
.section-heading{margin-bottom:30px;max-width:760px;}
.section-heading h2{font-size:clamp(24px,3vw,34px);letter-spacing:.025em;margin-bottom:13px;line-height:1.65;}
.section-heading p{font-size:13px;color:var(--muted);max-width:680px;line-height:2;}
.worksheet{border-top:1px solid var(--ink);padding-top:58px;padding-bottom:76px;}
.chooser-layout{display:grid;grid-template-columns:.85fr 1.15fr;background:var(--wash);}
.chooser-form{padding:30px 36px;display:grid;align-content:start;gap:8px;border-right:1px solid var(--line);}
.chooser-form label,.feedback-form label{font-size:12px;font-weight:700;}
.chooser-form input,.chooser-form select,.feedback-form input,.feedback-form select,.feedback-form textarea{border:1px solid #9ab2a4;background:var(--paper);color:var(--ink);border-radius:0;min-width:0;padding:11px 12px;width:100%;font-size:15px;margin-bottom:12px;}
.input-note{font-size:11px;color:var(--muted);line-height:1.9;}
.chooser-submit{display:flex;align-items:center;justify-content:space-between;background:transparent;border:0;border-bottom:2px solid var(--ink);color:var(--ink);padding:13px 0 9px;text-align:left;font-size:14px;font-weight:700;margin-top:8px;transition:padding .2s;}
.chooser-submit:hover{padding-right:8px;}
.chooser-results{padding:29px 34px;}
.result-caption{font-size:11px;color:var(--muted);margin-bottom:8px;}
.result-row{padding:16px 0;border-bottom:1px solid var(--line);}
.result-row>div{display:flex;justify-content:space-between;gap:15px;align-items:baseline;}
.result-row h3{font-size:16px;}
.result-row p{font-size:11px;color:var(--muted);margin-top:7px;line-height:1.9;}
.result-state{font-size:10px;background:var(--ink);color:white;padding:2px 8px;white-space:nowrap;}
.result-state.muted{background:#d5dfd9;color:var(--ink);}
.result-detail{display:inline-block;font-size:12px;font-weight:700;margin:18px 0;}
.small-note{font-size:10px;line-height:1.9;color:var(--muted);}
.form-error{font-size:13px;border-left:3px solid var(--ink);padding-left:15px;margin-top:20px;}
.comparison{padding-block:20px 80px;}
.table-scroll{overflow-x:auto;border-block:2px solid var(--ink);}
table{border-collapse:collapse;width:100%;min-width:800px;table-layout:fixed;font-size:12px;line-height:1.9;}
th,td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:18px 20px;}
thead th{font-size:14px;background:var(--wash);padding-block:22px;}
thead th:first-child{width:145px;}
tbody th{font-size:11px;font-weight:500;color:var(--muted);}
td strong.capacity{display:block;font:30px ui-monospace,monospace;letter-spacing:-.04em;margin-bottom:10px;}
td small{display:block;font-size:10px;color:var(--muted);line-height:1.9;}
.source-links a{margin-right:13px;font-size:11px;white-space:nowrap;display:inline-block;}
.product-link{font-size:11px;font-weight:700;line-height:1.8;display:inline-block;}
.table-note{font-size:11px;color:var(--muted);margin-top:18px;max-width:900px;line-height:2;}
.guides{padding-block:35px 80px;border-top:1px solid var(--line);}
.guide-layout{display:grid;grid-template-columns:1fr 280px;gap:48px;}
.article-row{display:grid;grid-template-columns:30px 1fr 24px;gap:16px;align-items:start;padding:25px 0;border-bottom:1px solid var(--line);text-decoration:none;}
.article-row:first-child{border-top:1px solid var(--line);}
.row-number{font:12px ui-monospace,monospace;color:var(--muted);padding-top:6px;}
.reading-meta{font-size:10px;color:var(--muted);letter-spacing:.03em;}
.article-row h3{font-size:17px;margin:5px 0 8px;line-height:1.8;}
.article-row p{font-size:11px;line-height:1.9;color:var(--muted);}
.row-arrow{font-size:20px;transition:transform .18s;}
.article-row:hover .row-arrow{transform:translate(3px,-3px);}
.article-row:hover h3{text-decoration:underline;text-underline-offset:5px;}
.download-strip{background:var(--wash);padding:24px;align-self:start;}
.download-mark{font-size:48px;line-height:1;display:block;margin:0 0 16px;}
.download-strip h3{font-size:19px;margin-bottom:12px;}
.download-strip>p{font-size:12px;line-height:2;margin-bottom:20px;color:var(--muted);}
.download-strip a{display:block;font-size:12px;font-weight:700;border-top:1px solid var(--line);padding:15px 0;text-decoration:none;}
.download-strip a:hover{text-decoration:underline;}
.download-strip a small{display:block;font:10px ui-monospace,monospace;color:var(--muted);margin-top:6px;}
.download-strip>p.small-note{font-size:10px;margin-top:16px;}
.footer{border-top:2px solid var(--ink);padding-block:35px;display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.footer-name{font-size:18px;font-weight:700;text-decoration:none;}
.footer p{font-size:11px;margin-top:8px;color:var(--muted);}
.footer nav{display:flex;gap:9px 20px;flex-wrap:wrap;justify-content:flex-end;align-content:start;font-size:11px;}
.footer>small{font-size:10px;color:var(--muted);}
.prose{max-width:800px;padding-block:45px 75px;}
.prose .back{display:inline-block;font-size:12px;margin-bottom:30px;}
.prose h1{font-size:clamp(27px,4vw,38px);line-height:1.65;margin:14px 0 22px;}
.prose .lead{font-size:16px;color:var(--muted);line-height:2.1;}
.prose h2{font-size:23px;margin:46px 0 18px;line-height:1.8;}
.prose p{font-size:15px;line-height:2.25;margin:0 0 21px;}
.prose .reading-meta{font-size:11px;}
.prose ul,.prose ol{padding-left:1.4em;line-height:2.15;font-size:14px;margin:18px 0 24px;}
.prose li{margin:8px 0;}
.prose a{overflow-wrap:anywhere;}
.contents{padding:23px 28px;border:1px solid var(--line);margin:32px 0 42px;font-size:12px;}
.contents ol{margin:12px 0 0;font-size:12px;}
.contents li{margin:5px 0;}
.article-action{margin-top:42px;padding:26px;background:var(--wash);}
.article-action h2{margin-top:0;font-size:21px;}
.article-action p{font-size:13px;}
.article-products{display:flex;flex-wrap:wrap;gap:15px;margin-top:25px;}
.sources{border-top:1px solid var(--line);margin-top:46px;}
.sources h2{font-size:20px;margin-top:28px;}
.sources p{font-size:12px;}
.sources ul{font-size:12px;}
.related{max-width:800px;padding-bottom:80px;}
.related h2{font-size:22px;margin-bottom:25px;}
.feedback-form{margin:30px 0;display:grid;gap:8px;}
.feedback-form p{font-size:12px;line-height:1.9;}
.feedback-submit{justify-self:start;border:0;background:var(--ink);color:var(--paper);padding:14px 28px;font-size:14px;}
.feedback-submit:hover{background:var(--accent);}
.honeypot{position:absolute;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden;}
.error-page{padding:100px 30px;max-width:720px;margin:auto;}
.error-page h1{font-size:28px;margin:20px 0;}
.error-page p{margin:20px 0;}
.error-page button{padding:10px;margin-right:20px;}
@media(min-width:900px){.masthead{height:80px;}}
@media(max-width:900px){.wrap{width:calc(100% - 48px);}.hero{gap:30px;padding-top:28px;}.hero h1{font-size:36px;}.working-sheet{padding:20px;}.guide-layout{grid-template-columns:1fr;gap:30px;}.download-strip{display:grid;grid-template-columns:1fr 1fr;gap:0 25px;}.download-strip h3,.download-mark{grid-column:1/-1;}.download-strip>p{grid-column:1/-1;}.chooser-form{padding:26px;}.chooser-results{padding:26px;}.masthead nav{gap:16px;font-size:12px;}.wordmark{font-size:19px;}}
@media(max-width:640px){body{font-size:15px;}.wrap{width:calc(100% - 36px);}.masthead{height:auto;min-height:104px;align-items:flex-start;justify-content:center;flex-direction:column;gap:14px;padding-block:17px;}.masthead nav{width:100%;justify-content:space-between;gap:10px;}.wordmark small{font-size:9px;}.wordmark img{width:30px;height:30px;}.disclosure{font-size:10px;}.hero{grid-template-columns:1fr;gap:33px;padding-block:31px 55px;}.hero-copy{padding:0;}.hero h1{font-size:clamp(33px,9vw,43px);line-height:1.55;}.eyebrow{font-size:10px;margin-bottom:15px;}.hero-intro{font-size:13px;margin-top:17px;}.hero-stamp{margin-top:25px;font-size:13px;padding:13px 20px;}.working-sheet{margin-right:5px;padding:22px;}.working-sheet h2{font-size:21px;}.check-row{font-size:11px;padding:10px 0;}.section-heading h2{font-size:23px;}.section-heading p{font-size:12px;}.worksheet{padding-top:35px;padding-bottom:50px;}.chooser-layout{grid-template-columns:1fr;}.chooser-form{border-right:0;border-bottom:1px solid var(--line);padding:23px;}.chooser-results{padding:23px;}.result-row h3{font-size:15px;}.comparison{padding-bottom:50px;}.guides{padding-block:30px 48px;}.article-row{grid-template-columns:22px 1fr 19px;gap:10px;padding:23px 0;}.article-row h3{font-size:16px;}.article-row p{font-size:11px;}.download-strip{display:block;}.download-mark{font-size:38px;}.footer{grid-template-columns:1fr;gap:20px;padding-block:28px;}.footer nav{justify-content:flex-start;gap:14px 20px;}.prose{padding-top:25px;}.prose h1{font-size:27px;}.prose h2{font-size:21px;}.prose p{font-size:14px;line-height:2.2;}.prose ul{font-size:13px;}.contents{padding:19px;}.prose .lead{font-size:14px;}.article-action{padding:21px;}.article-action h2{font-size:19px;}.related{padding-bottom:45px;}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto;}*,*:before,*:after{animation:none!important;transition:none!important;}}
@media print{.masthead nav,.disclosure,.footer,.hero-stamp,.chooser-submit,.article-action,.related{display:none;}body,.working-sheet,.chooser-layout{background:white;color:#173a30;}.wrap{width:100%;}.hero{display:block;}.hero-copy{margin-bottom:30px;}.working-sheet{box-shadow:none;}a{color:inherit;}section{break-inside:avoid;}}