@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color 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transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}}:root{--ink:#17211b;--muted:#5f6b63;--paper:#f6f5ef;--card:#fff;--line:#dfe3dc;--green:#2f6848;--green-dark:#214c35;--lime:#dce8c7;--orange:#eaa867;--shadow:0 18px 50px #23342914}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);margin:0;font-family:Yu Gothic UI,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button,a{touch-action:manipulation}h1,h2,h3,p{margin-top:0}h1,h2,h3{letter-spacing:-.025em;line-height:1.25}h1{font-size:clamp(2.25rem,7vw,5.25rem)}h2{font-size:clamp(1.5rem,3vw,2.25rem)}h3{font-size:1.18rem}.shell{width:min(1120px,100% - 32px);margin-inline:auto}.skip-link{z-index:99;background:var(--ink);color:#fff;border-radius:8px;padding:10px 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solid #eaa867a6}.toolbox-mark{aspect-ratio:4/5;border:2px solid var(--ink);box-shadow:14px 14px 0 var(--lime);background:#fff;border-radius:20px;flex-direction:column;justify-content:space-between;padding:26px;display:flex;transform:rotate(3deg)}.toolbox-mark span{color:var(--orange);font-weight:900}.toolbox-mark strong{font-size:2.1rem;line-height:.95}.toolbox-mark small{letter-spacing:.12em;font-weight:800}.section-block{padding:72px 0}.section-heading{justify-content:space-between;align-items:end;gap:20px;margin-bottom:26px;display:flex}.section-heading h2{margin:6px 0 0}.section-heading>p{color:var(--muted);font-weight:700}.search-section{padding-top:40px}.search-box{display:block}.search-box input{border:1px solid var(--line);width:100%;min-height:62px;box-shadow:var(--shadow);background:#fff;border-radius:14px;padding:0 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p{color:var(--muted);margin-bottom:0}.content-layout{grid-template-columns:minmax(0,1fr) 300px;gap:50px;padding:70px 0 10px;display:grid}.article-content section{padding:0 0 42px}.article-content h2{font-size:1.65rem}.article-content p,.article-content li{color:#455047}.article-content li+li{margin-top:8px}.formula{background:#eceee9;border-radius:9px;padding:14px 18px;font-weight:800;color:var(--ink)!important}.side-note{border:1px solid var(--line);background:#fff;border-radius:14px;align-self:start;padding:24px;position:sticky;top:100px}.side-note h2{font-size:1.15rem}.side-note p:last-child{color:var(--muted);font-size:.9rem}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{cursor:pointer;padding:18px 4px;font-weight:800}.faq-list details p{padding:0 4px 18px}.legal-content{max-width:760px;padding:60px 0}.legal-content h1{margin:10px 0 18px;font-size:clamp(2.3rem,6vw,4.5rem)}.legal-content h2{margin-top:50px;font-size:1.45rem}.notice{border:1px solid var(--line);background:#fff;border-radius:10px;padding:16px}.not-found{min-height:60vh;padding-block:110px}.not-found h1{margin:12px 0 20px}.not-found p{color:var(--muted);margin-bottom:28px}.site-footer{border-top:1px solid var(--line);background:#e9ebe4;padding:62px 0 25px}.footer-grid{grid-template-columns:2fr 1fr 1fr;gap:50px;display:grid}.footer-grid h2{text-transform:uppercase;letter-spacing:.12em;font-size:.8rem}.footer-grid li+li{margin-top:8px}.footer-grid a{text-underline-offset:4px;-webkit-text-decoration:underline #b6bdb6;text-decoration:underline #b6bdb6}.footer-brand{font-size:1.3rem}.copyright{width:min(1120px,100% - 32px);color:var(--muted);border-top:1px solid #cfd4cd;margin:50px auto 0;padding-top:18px;font-size:.78rem}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media 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button{justify-self:start;margin-top:8px}@media (max-width:520px){.mode-tabs{flex-direction:column;align-items:stretch}.generator-output{padding:16px}}@media (prefers-reduced-motion:no-preference){.tool-card,.primary-button,.secondary-button{transition:transform .2s,box-shadow .2s,background .2s}}.ec-diagram{flex-wrap:wrap;justify-content:space-between;gap:20px 12px;margin-top:28px;padding-top:4px;display:flex;position:relative}.ec-diagram-line{background:var(--line);z-index:0;height:2px;position:absolute;top:38px;left:38px;right:38px}.ec-node{z-index:1;text-align:center;width:15%;min-width:92px;color:var(--ink);flex-direction:column;align-items:center;gap:8px;display:flex;position:relative}.ec-node-icon{border:2px solid var(--green);width:64px;height:64px;color:var(--green);background:#fff;border-radius:999px;justify-content:center;align-items:center;display:flex}.ec-node-icon svg{width:26px;height:26px}a.ec-node.is-link:hover .ec-node-icon,a.ec-node.is-link:focus-visible 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li+li{border-top:1px solid var(--line)}.next-checks a{color:var(--ink);justify-content:space-between;padding:12px 0;font-weight:800;display:flex}.next-checks a:after{content:"→";color:var(--green)}.next-checks p{color:var(--muted);margin:2px 0 0;font-size:.85rem;font-weight:500}.diagnosis-cta{border-left:4px solid var(--green);background:#eef3e8;border-radius:0 14px 14px 0;margin-top:28px;padding:24px 28px}.diagnosis-cta h2{margin-bottom:8px;font-size:1.15rem}.diagnosis-cta p{color:var(--muted);margin-bottom:16px}.site-header .nav-secondary a{color:var(--muted)}.site-header .nav-cta{background:var(--green);color:#fff;font-weight:800}.site-header .nav-cta:hover,.site-header .nav-cta:focus-visible{background:var(--green-dark)}.tool-card-eyebrow-row{justify-content:space-between;align-items:center;gap:8px;display:flex}.tool-badge{background:var(--lime);color:var(--green-dark);letter-spacing:.04em;border-radius:999px;padding:3px 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