:root{--blue:#284fff;--ink:#17233c;--muted:#657087;--line:#e2e7f0;--bg:#f5f7fc}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Noto Sans JP","Hiragino Kaku Gothic ProN",sans-serif;font-size:16px;line-height:1.65}a{color:var(--blue);text-underline-offset:4px}header{max-width:1240px;margin:auto;padding:25px 30px;display:flex;justify-content:space-between;align-items:center}.brand{display:flex;align-items:center;gap:10px;font-size:25px;font-weight:900;text-decoration:none;color:var(--ink)}.mark{background:var(--blue);color:white;display:grid;place-content:center;width:35px;height:35px;border-radius:10px;font-family:Arial;font-size:35px;line-height:1;padding-bottom:6px}.brand-en{font-size:12px;letter-spacing:2px;margin-left:5px;color:var(--muted)}nav{display:flex;gap:28px;font-size:14px}nav a{color:var(--muted);text-decoration:none}main{max-width:1180px;margin:auto;padding:18px 30px 36px}.page-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.eyebrow{font-weight:700;color:var(--blue);font-size:14px;letter-spacing:.07em;margin:0 0 6px}h1{font-size:38px;line-height:1.35;letter-spacing:-.035em;margin:8px 0 10px}h1 span{color:var(--blue)}.page-title p:last-child{margin:0;color:var(--muted)}.date{font-size:12px;border-left:2px solid var(--line);padding-left:18px;color:var(--muted)}.date strong{font-size:14px;color:var(--ink)}.workspace{display:grid;grid-template-columns:310px minmax(0,1fr);gap:24px;align-items:start}.inputs{position:sticky;top:20px;background:white;border:1px solid var(--line);border-radius:20px;padding:24px}.section-label{display:flex;align-items:center;gap:10px;margin-bottom:20px}.section-label>span:first-child{color:var(--blue);font-size:12px;letter-spacing:.08em;font-weight:800}.section-label h2{font-size:18px;margin:0}.estimate{margin-left:auto;color:var(--muted);font-size:12px}.inputs label{display:block;margin:20px 0 8px;font-size:14px;font-weight:700}.required{font-weight:400;color:var(--blue);font-size:12px;margin-left:7px}.money{display:flex;align-items:center;border:1px solid #cdd5e4;border-radius:10px;padding:0 13px;gap:8px;background:white}.money:focus-within{outline:3px solid #c5d0ff;border-color:var(--blue)}input,select,button{font:inherit;color:inherit}input{min-width:0}input[type=number]{appearance:textfield;-moz-appearance:textfield}input::-webkit-inner-spin-button,input::-webkit-outer-spin-button{appearance:none}.money input{border:0;outline:0;width:100%;padding:12px 0;font-variant-numeric:tabular-nums}.money span{font-size:14px;color:var(--muted)}.primary{border:2px solid var(--blue)}.primary input{font-size:29px;font-weight:750;padding:12px 0}.hint{font-size:12px;color:var(--muted);line-height:1.7;margin:8px 0}.presets{display:flex;gap:6px;margin:14px 0 22px}.presets button{padding:5px 8px;background:#f0f3ff;border:0;border-radius:6px;color:var(--blue);font-size:12px;cursor:pointer}.formula{font-size:12px;background:#f4f6fc;border-radius:10px;padding:13px;margin-top:25px;line-height:2}.reset{border:0;background:none;font-size:14px;color:var(--muted);text-decoration:underline;cursor:pointer;display:block;margin:18px auto 0}.summary{background:var(--blue);color:white;border-radius:16px;padding:20px 24px;display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.summary small{display:block;color:#d9e2ff;font-size:12px}.summary h3{font-size:19px;margin:4px 0}.summary .total{font-size:30px;font-weight:800;font-variant-numeric:tabular-nums;white-space:nowrap}.summary .summary-money{text-align:right}.card{background:white;border:1px solid var(--line);border-radius:16px;margin-bottom:12px;padding:20px 22px}.card-top{display:flex;align-items:center;gap:10px}.avatar{border-radius:8px;color:white;width:30px;height:30px;display:grid;place-content:center;font-size:15px;font-weight:800;flex-shrink:0}.card h3{font-size:16px;margin:0}.rate{font-size:12px;color:var(--muted);margin-left:auto}.card-body{display:grid;grid-template-columns:minmax(0,1fr) 165px;gap:18px;align-items:center;margin-top:16px}.card label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}select{width:100%;padding:10px 30px 10px 10px;border:1px solid #cdd5e4;border-radius:8px;background:white;font-size:14px;min-width:0;min-height:44px}.amount{text-align:right;font-variant-numeric:tabular-nums}.amount span{font-size:12px;color:var(--muted)}.amount strong{display:block;font-size:26px;font-weight:800;line-height:1.4}.amount .profit{font-size:14px;color:var(--blue)}.amount .negative,.negative{color:#bc3030!important}.breakdown{display:flex;gap:8px 15px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:14px;border-top:1px solid #eef1f6;padding-top:12px}.card details{font-size:14px;margin-top:12px}.card summary{color:var(--blue);cursor:pointer;min-height:32px}.settings{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px;padding:16px;background:#f5f7fc;border-radius:10px}.settings input{width:100%;padding:10px;border:1px solid #cdd5e4;border-radius:8px;font-size:16px;min-height:44px}.settings label{font-size:14px}.settings .check{grid-column:1/-1;display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink)}.check input{width:18px;height:18px;min-height:0}.ship-note{font-size:12px;color:var(--muted);margin:6px 0 0}.shipping-manual{margin-top:8px}.shipping-manual input{width:100%;border:1px solid #cdd5e4;border-radius:8px;padding:8px}.warning,.error{color:#a53610;background:#fff1e8;border-radius:8px;padding:10px;font-size:14px}.comparison-note{color:var(--muted);font-size:12px}.ad-slot{margin:32px 0;background:#eef1f6;border:1px dashed #c5cddc;min-height:95px;border-radius:12px;display:flex;flex-direction:column;justify-content:center;align-items:center;color:#788399;font-size:12px}.ad-slot small{font-size:12px}.guide{border-top:1px solid var(--line);padding:32px 0}.guide h2,.notes h2,.sources h2{font-size:23px;line-height:1.5}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.guide-grid article>span{font-size:22px;font-weight:900;color:var(--blue)}.guide h3{font-size:17px;margin:8px 0}.guide p{font-size:14px;color:var(--muted)}.notes{background:white;border:1px solid var(--line);border-radius:16px;padding:24px}.notes h2{margin:0 0 16px}.notes details{border-top:1px solid var(--line);padding:15px 0}.notes summary{cursor:pointer;font-weight:650;font-size:16px}.notes p,.sources p{color:var(--muted);font-size:14px}.sources{padding:24px 0}.source-row{display:flex;gap:12px;flex-wrap:wrap;margin:10px 0;font-size:14px}.source-row b{width:155px}.source-row a{font-size:12px}footer{border-top:1px solid var(--line);padding-top:24px;color:var(--muted);font-size:12px}footer .brand{font-size:20px}footer details{max-width:800px}footer summary{cursor:pointer}button:hover{opacity:.8}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #9aafff;outline-offset:3px}[hidden]{display:none!important}@media(max-width:850px){.workspace{grid-template-columns:260px minmax(0,1fr);gap:16px}.inputs{padding:18px}.card-body{grid-template-columns:1fr}.amount{text-align:left;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}.amount strong{font-size:25px}.summary{padding:18px;gap:12px}.summary .total{font-size:25px}}@media(max-width:650px){header{padding:18px 18px}.brand-en{display:none}nav{gap:14px;font-size:12px}main{padding:10px 16px 28px}.page-title{margin-bottom:22px}.page-title h1{font-size:29px}.page-title p:last-child{font-size:14px}.date{display:none}.workspace{grid-template-columns:1fr}.inputs{position:static;padding:20px}.inputs .section-label{margin-bottom:8px}.inputs label{margin-top:16px}.formula{margin-top:16px}.presets{margin-bottom:16px}.results>.section-label{margin-top:8px}.card{padding:18px}.card-body{grid-template-columns:1fr}.settings{padding:12px;gap:10px}.settings>div{grid-column:1/-1}.guide-grid{grid-template-columns:1fr;gap:12px}.guide-grid article{border-left:3px solid #d5ddff;padding-left:15px}.guide h2{font-size:22px}.notes{padding:18px}.notes h2{font-size:20px}.source-row b{width:100%}.summary .total{font-size:26px}.summary h3{font-size:16px}.card h3{font-size:15px}.rate{font-size:12px}.amount{justify-content:flex-start}.amount .profit{margin-left:auto}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}