:root{--ink:#182b45;--muted:#4b5563;--blue:#174d89;--line:#d3d9e1;--input-line:#65758b;--paper:#f6f7f9;--soft:#f0f4f8;--white:#fff;--warm:#fff7e5;--warning:#775300}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:white;color:var(--ink);font:400 16px/1.75 "Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif}[hidden]{display:none!important}a{color:var(--blue);text-underline-offset:.22em;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}:where(a,button,input,select,summary,[tabindex]):focus-visible{outline:3px solid var(--ink);outline-offset:3px;box-shadow:0 0 0 6px #ffdf6b}section[id],h2[id],#results{scroll-margin-top:24px}.wrap{width:min(1120px,calc(100% - 64px));margin-inline:auto}.skip-link{position:fixed;top:8px;left:8px;z-index:10;padding:10px 18px;background:white;transform:translateY(-160%)}.skip-link:focus{transform:none}
.site-header{min-height:112px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:2px solid var(--ink);padding:22px 0}.masthead{display:flex;flex-direction:column;gap:3px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:700;font-size:24px;letter-spacing:-.025em}.brand-mark{width:28px;height:28px;display:inline-grid;place-items:center;border:1px solid currentColor;font-size:19px}.masthead-note{margin:0;color:var(--muted);font-size:14px}.site-header nav{display:flex;gap:28px;align-items:center}.site-header nav a{display:inline-flex;min-height:44px;align-items:center;font-size:16px;text-decoration:none;color:var(--ink)}.site-header nav a:hover{text-decoration:underline}.preview{color:var(--muted);padding:2px 8px;border:1px solid var(--input-line);font-size:14px;white-space:nowrap}
.hero{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:70px;padding-block:56px 44px}.eyebrow{font-size:16px;font-weight:700;color:var(--blue);margin:0 0 18px;letter-spacing:.02em}h1,h2,h3,h4{font-weight:700;overflow-wrap:anywhere}h1{margin:0 0 22px;font-size:clamp(32px,3.4vw,44px);line-height:1.45;letter-spacing:-.01em}h2{font-size:28px;line-height:1.5;margin:0 0 16px}h3{font-size:22px;line-height:1.6;margin:0 0 12px}h4{font-size:18px;margin:0 0 10px;line-height:1.6}p{margin:0 0 18px}.lead{font-size:18px;max-width:40em;line-height:1.9;margin-bottom:25px}.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px 24px}.button{display:inline-flex;min-height:52px;align-items:center;justify-content:center;gap:20px;padding:12px 22px;background:var(--blue);color:white;border:2px solid var(--blue);border-radius:4px;font-size:16px;font-weight:700;line-height:1.6;text-decoration:none;text-align:center;cursor:pointer}.button:hover{background:#103968;border-color:#103968;text-decoration:none}.button.secondary{background:white;color:var(--blue)}.button.secondary:hover{background:var(--soft)}.button[aria-disabled=true]{cursor:wait}.text-link{display:inline-block;padding-block:6px;font-size:16px;font-weight:700}.hero-note,.article-meta,.source-note,.cost-note,small{display:block;font-size:14px;color:var(--muted);line-height:1.75}.hero-note{margin:14px 0 0}.hero-aside{border-left:1px solid var(--line);padding-left:32px}.hero-aside .eyebrow{font-size:14px;margin-bottom:12px}.hero-aside h2{font-size:22px}.hero-aside a{font-weight:700;display:inline-block;padding-block:6px}.small-checklist{list-style:none;padding:0;margin:18px 0}.small-checklist li{padding:10px 0;border-top:1px solid var(--line)}.small-checklist li:last-child{border-bottom:1px solid var(--line)}.small-checklist span{color:var(--muted);font-variant-numeric:tabular-nums;margin-right:12px}.trust-line{display:flex;flex-wrap:wrap;column-gap:28px;row-gap:8px;margin:0;padding:19px 0;border-block:1px solid var(--line);color:var(--muted);font-size:14px;list-style:none}.trust-line li::before{content:"・";color:var(--ink)}
.reading{padding-block:48px}.section-heading{max-width:770px;margin-bottom:28px}.section-heading .eyebrow{margin-bottom:8px}.section-heading>p:not(.eyebrow){color:var(--muted);margin:0}.section-header{display:flex;align-items:baseline;justify-content:space-between;gap:24px;margin-bottom:20px}.section-header h2{margin:0}.section-header p{margin:0;color:var(--muted);font-size:14px}.guide-list{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;border-top:1px solid var(--ink)}.guide-item{display:grid;grid-template-columns:36px minmax(0,1fr);gap:14px;padding-block:24px;border-bottom:1px solid var(--line)}.guide-number{color:var(--muted);font-size:18px;font-variant-numeric:tabular-nums;padding-top:3px}.guide-item h3{font-size:20px;margin-bottom:8px}.guide-item h3 a{color:var(--ink);text-decoration:none}.guide-item h3 a:hover{text-decoration:underline}.guide-item p{color:var(--muted);margin-bottom:8px}.guide-topic{font-size:14px;color:var(--blue);font-weight:700;display:block;margin-bottom:6px}.guide-item small{margin:0}.tool-band{background:var(--paper);border-block:1px solid var(--line)}.tool-section{padding-block:48px 56px}.tool-grid{display:grid;grid-template-columns:360px minmax(0,1fr);gap:32px;align-items:start}.tool-grid>*,.article-layout>*{min-width:0}.panel{padding:28px;background:white;border:1px solid var(--line);border-radius:4px}.form-panel{padding:24px}.form-step{font-size:18px;font-weight:700;margin-bottom:22px}.form-row{margin-bottom:22px}.form-row>label{display:block;font-size:16px;font-weight:700;margin-bottom:7px}.requirement{font-size:14px;font-weight:400;color:var(--muted);white-space:nowrap}input[type=number],select{width:100%;min-width:0;min-height:48px;padding:10px 12px;border:1px solid var(--input-line);border-radius:4px;background:white;color:var(--ink);font-size:16px}.form-row small{margin:7px 0 0}.number-unit{display:flex;align-items:center;gap:10px}.number-unit span{white-space:nowrap}.number-unit input{max-width:13em}.check{display:flex;align-items:flex-start;gap:12px;margin:0;padding-block:10px;cursor:pointer;min-height:44px}.check input{accent-color:var(--blue);width:20px;height:20px;margin:4px 0 0;flex-shrink:0}.form-group{border:0;padding:0;margin:28px 0;min-width:0}.form-group legend{font-weight:700;font-size:18px;border-top:1px solid var(--line);padding:20px 0 5px;width:100%}.form-group .form-row{margin:18px 0 0}summary{cursor:pointer;font-weight:700;min-height:44px;padding-block:10px}summary:hover{color:var(--blue)}.form-details{border-top:1px solid var(--line);margin-block:18px}.detail-content{padding-top:12px}.full-width{width:100%;margin-top:10px;padding-inline:10px}.form-foot{font-size:14px;color:var(--muted);line-height:1.8;margin:12px 0 0}.results{min-width:0}.empty-result{min-height:370px;padding:32px}.empty-result h3{font-size:26px}.empty-result .eyebrow{font-size:14px}.sample-receipt{margin-block:26px}.sample-receipt>div{display:flex;justify-content:space-between;gap:18px;padding-block:14px;border-bottom:1px solid var(--line)}.sample-receipt span{color:var(--muted)}.sample-receipt small{margin-top:14px}.status{font-size:14px;color:var(--muted);margin:16px 0 0}
.result-summary{margin-bottom:24px;border-top:4px solid var(--blue)}.result-summary .eyebrow{font-size:14px;margin-bottom:10px}.result-summary h3{font-size:24px}.result-summary p{margin:8px 0}.decision-list{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-block:24px}.decision-list h4{font-size:16px}ul,ol{padding-left:1.5em}.decision-list ul{padding-left:1.2em;margin:0}.result-heading{display:flex;align-items:baseline;gap:12px;font-size:20px;margin:30px 0 14px}.result-heading span{font-weight:400;font-size:16px;color:var(--muted)}.plan-card{margin-bottom:18px}.plan-top{display:flex;flex-direction:column;align-items:flex-start;gap:8px}.plan-top h3{margin:0;font-size:21px}.tag{display:inline-block;font-size:14px;padding:2px 8px;border:1px solid currentColor}.tag.confirm{color:var(--warning);background:var(--warm)}.tag.fit{color:var(--blue);background:var(--soft)}.plan-reasons{margin:18px 0;padding-left:1.2em}.receipt-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-top:22px}.receipt-heading span{font-size:14px;color:var(--muted)}.cost-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;border-top:1px solid var(--line);margin:10px 0 14px;padding-top:18px}.cost-grid dt{font-size:16px}.cost-grid dd{margin:6px 0 0;font-size:22px;font-weight:700;line-height:1.5;font-variant-numeric:tabular-nums}.cost-grid dd small{font-weight:400;margin-top:5px}.cost-grid .highlight{grid-column:1/-1;background:var(--soft);padding:16px}.cost-grid .highlight dd{font-size:28px}.whole-cost{border-top:1px solid var(--line);margin-top:22px;padding-top:2px}.whole-cost .receipt-heading{flex-direction:column;gap:0}.whole-cost .cost-grid dd{font-size:22px}.confirmation{background:var(--warm);border-left:3px solid var(--warning);padding:16px 18px;margin-block:22px}.confirmation ul{margin:8px 0 0;padding-left:1.2em}.plan-card details{border-top:1px solid var(--line);margin-top:14px}.source-links{margin-top:24px;border-top:1px solid var(--line);padding-top:20px}.source-links .button{font-size:16px;display:flex}.source-links details a{display:inline-block;padding-block:6px}.source-links details ul{margin:0;padding-left:1.2em}.source-note,.cost-note{margin:10px 0}.warning-list{color:var(--muted)}.result-error{border:2px solid #a52620}.result-error h3{color:#a52620}.excluded-list,.more-plans{background:white;padding:16px 24px;border:1px solid var(--line);margin-block:24px;border-radius:4px}.more-plans>summary span{display:block;font-size:14px;font-weight:400;color:var(--muted);margin-top:4px}.more-plans>div{margin-top:16px}.excluded-item{border-top:1px solid var(--line);padding-block:18px}.excluded-item ul{margin-bottom:0}.steps-panel{margin-block:24px}.steps-panel li{margin-block:12px}.personal-choice{margin-bottom:24px;border-left:4px solid var(--blue)}
.evidence{padding-block:48px;display:grid;grid-template-columns:300px minmax(0,1fr);gap:60px}.evidence .eyebrow{margin-bottom:8px}.evidence h2{font-size:24px}.evidence dl{display:grid;grid-template-columns:110px minmax(0,1fr);margin:0 0 22px}.evidence dt,.evidence dd{border-bottom:1px solid var(--line);padding-block:12px;margin:0}.evidence dt{font-weight:700}.site-footer{padding-block:28px 40px;border-top:2px solid var(--ink);display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px 30px;align-items:baseline}.site-footer .brand{font-size:20px}.site-footer p{font-size:14px;color:var(--muted);margin:0}.footer-links{display:flex;gap:20px;flex-wrap:wrap}.footer-links a{font-size:14px;min-height:32px;display:inline-flex;align-items:center}.site-footer small{width:100%}
.article-header{width:min(1120px,calc(100% - 64px));margin:36px auto 32px}.article-nav{font-size:14px;color:var(--muted);margin-bottom:26px}.article-header h1{font-size:36px;max-width:25em;line-height:1.6}.article-description{max-width:47em;font-size:18px}.article-meta{margin-block:16px}.editor-credit{color:var(--muted);font-size:14px;margin-block:18px;padding-top:14px;border-top:1px solid var(--line)}.article-layout{width:min(1120px,calc(100% - 64px));margin:0 auto 64px;display:grid;grid-template-columns:minmax(0,740px) minmax(200px,1fr);gap:64px;align-items:start}.article{max-width:760px;margin:48px auto 64px;width:calc(100% - 64px)}.article-layout .article{margin:0;padding:0;width:100%}.article p,.article li{font-size:17px;line-height:1.9}.article p{margin-bottom:24px}.article h2{font-size:26px;border-top:1px solid var(--line);padding-top:26px;margin:44px 0 20px}.article h3{font-size:22px;margin:32px 0 14px}.article li{margin-block:10px}.article-toc{position:sticky;top:24px;font-size:16px;padding-left:24px;border-left:1px solid var(--line)}.article-toc strong{font-size:16px}.article-toc ul{list-style:none;margin:12px 0 24px;padding:0}.article-toc li{margin:0}.article-toc a{display:inline-block;padding-block:8px;line-height:1.6}.article-toc .button{font-size:16px;display:flex}.table-scroll{overflow-x:auto;margin-block:28px}table{width:100%;border-collapse:collapse;font-size:16px;line-height:1.7}th,td{padding:16px;border:1px solid var(--line);text-align:left;vertical-align:top}th{background:var(--soft);font-weight:700}.article-cta{padding:28px;background:var(--soft);margin-block:40px;border-left:4px solid var(--blue)}.article-cta h2{margin:0 0 14px;border:0;padding:0;font-size:24px}.article-cta p{font-size:16px;margin-bottom:18px}.article-cta small{margin-top:12px}.related-guides{margin-top:40px}.related-guides a{display:block;padding-block:10px}.article .lead-callout{border-left:4px solid var(--blue);padding-left:24px}.method-article h1{font-size:36px}.method-facts{background:var(--soft);padding:24px;margin-block:28px}.method-facts dt{font-weight:700}.method-facts dd{margin:0 0 16px}.method-facts dd:last-child{margin-bottom:0}
@media(max-width:980px){.site-header{flex-wrap:wrap;gap:12px}.site-header nav{gap:20px}.hero{grid-template-columns:minmax(0,1fr) 280px;gap:36px}.hero-aside{padding-left:24px}.tool-grid{grid-template-columns:340px minmax(0,1fr);gap:24px}.panel{padding:22px}.decision-list,.cost-grid{grid-template-columns:1fr}.article-layout{grid-template-columns:minmax(0,1fr);gap:32px;max-width:760px}.article-toc{position:static;grid-row:1;border:1px solid var(--line);padding:22px}.article-toc ul{columns:2;column-gap:28px}.article-toc .button{display:inline-flex}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.site-header{padding-block:20px 12px}.masthead{flex:1}.brand{font-size:22px}.site-header nav{width:100%;order:3;justify-content:space-between;gap:16px;flex-wrap:wrap}.hero{grid-template-columns:1fr;gap:28px;padding-block:32px}.hero h1{font-size:clamp(26px,7.7vw,34px)}.hero-aside{border-left:0;border-top:1px solid var(--line);padding:24px 0 0}.hero-aside h2{margin-bottom:12px}.small-checklist{display:none}.hero-actions{gap:10px;align-items:flex-start;flex-direction:column}.hero-actions .button{width:100%}.lead{font-size:17px}.trust-line{display:block}.trust-line li{margin-block:6px}.section-header{display:block}.section-header h2{margin-bottom:8px}.reading{padding-block:32px}.guide-list{grid-template-columns:1fr}.guide-item{padding-block:22px}.section-heading{margin-bottom:24px}h2{font-size:26px}.tool-section{padding-block:32px}.tool-grid{grid-template-columns:1fr;gap:24px}.form-panel{padding:22px}.sample-receipt>div{display:block}.sample-receipt strong{display:block;margin-top:5px}.empty-result{min-height:0}.empty-result h3{font-size:24px}.receipt-heading{flex-direction:column;gap:0}.evidence{grid-template-columns:1fr;gap:16px;padding-block:32px}.evidence dl{grid-template-columns:92px minmax(0,1fr);gap:0 12px}.site-footer{align-items:flex-start;flex-direction:column}.article-header{width:calc(100% - 40px);margin-top:28px}.article-header h1,.method-article h1{font-size:28px}.article-header .article-description{font-size:17px}.article-layout,.article{width:calc(100% - 40px)}.article-toc ul{columns:1}.article-toc .button{display:flex}.article p,.article li{font-size:16px}.article h2{font-size:24px}.article-cta{padding:22px}th,td{min-width:150px;padding:12px}.table-scroll{border:1px solid var(--line)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header nav,.preview,.form-panel,.hero-actions,.article-toc,.skip-link{display:none}body{background:white;color:black}.tool-grid,.article-layout{display:block}.wrap,.article-layout,.article{width:100%}.panel,.article-cta{break-inside:avoid}}
