:root{--bg: #fafaf7;--bg-elev: #ffffff;--bg-card: #ffffff;--bg-soft: #f3f1ec;--fg: #1a1d24;--fg-soft: #2c313c;--fg-muted: #6b7280;--brand: #0f4c81;--brand-soft: #1a73d1;--brand-ink: #ffffff;--accent: #d97842;--accent-soft: #f4a261;--border: #e6e4dd;--border-strong: #d4d0c4;--danger: #e54e3a;--max: 1180px;--max-prose: 740px;--radius-sm: 8px;--radius: 14px;--radius-lg: 22px;--shadow-sm: 0 1px 2px rgba(15, 24, 40, .05);--shadow: 0 4px 16px rgba(15, 24, 40, .08);--shadow-lg: 0 12px 36px rgba(15, 24, 40, .12);--font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Meiryo", system-ui, -apple-system, "Segoe UI", sans-serif;--font-display: "Zen Kaku Gothic New", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", sans-serif;--font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace}@media(prefers-color-scheme:dark){:root{--bg: #0f1115;--bg-elev: #161922;--bg-card: #1b1f2a;--bg-soft: #1a1d26;--fg: #e7ecf3;--fg-soft: #cfd6e3;--fg-muted: #9aa3b2;--brand: #7cc4ff;--brand-soft: #a4d6ff;--brand-ink: #0a2540;--accent: #f2b56b;--accent-soft: #f6c98c;--border: #262c39;--border-strong: #353c4d;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow: 0 4px 24px rgba(0, 0, 0, .32);--shadow-lg: 0 16px 40px rgba(0, 0, 0, .45)}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font-sans);font-feature-settings:"palt";line-height:1.78;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:3px}img{max-width:100%;height:auto;display:block}.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:var(--brand-ink);padding:8px 12px;border-radius:6px}.skip-link:focus{left:12px;top:12px;z-index:100}.site-header{position:sticky;top:0;z-index:20;background:color-mix(in oklab,var(--bg) 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25%,transparent)}.article__title{font-family:var(--font-display);font-size:clamp(1.7rem,3.8vw,2.4rem);line-height:1.32;margin:0 0 18px;letter-spacing:-.018em;font-weight:900}.article__meta{display:flex;flex-wrap:wrap;gap:16px;color:var(--fg-muted);font-size:.88rem}.article__tags{list-style:none;padding:0;margin:18px 0 0;display:flex;flex-wrap:wrap;gap:8px}.article__tags li{background:var(--bg-soft);border:1px solid var(--border);padding:3px 12px;border-radius:999px;font-size:.8rem;color:var(--fg-muted)}.article__footer{margin-top:56px;padding-top:24px;border-top:1px solid var(--border)}.article__disclosure{font-size:.86rem;color:var(--fg-muted);background:var(--bg-soft);border:1px solid var(--border);padding:14px 16px;border-radius:var(--radius);line-height:1.65}.back-link{display:inline-block;margin-top:22px;font-weight:600}.toc{background:var(--bg-soft);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:var(--radius);padding:16px 20px;margin:0 0 36px}.toc summary{font-family:var(--font-display);font-size:1.02rem;font-weight:800;cursor:pointer;list-style:none;display:flex;align-items:center;gap:10px;color:var(--fg)}.toc summary::-webkit-details-marker{display:none}.toc summary:after{content:"▾";margin-left:auto;color:var(--fg-muted);transition:transform .2s ease;font-size:.9rem}.toc details[open] summary:after{transform:rotate(180deg)}.toc__icon{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:6px;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-weight:800;font-size:.96rem}.toc__list{list-style:none;padding:0;margin:14px 0 0;counter-reset:toc-counter}.toc__item{position:relative;padding:4px 0 4px 28px;font-size:.93rem;border-top:1px dashed var(--border)}.toc__item:first-child{border-top:0;padding-top:8px}.toc__item--2{counter-increment:toc-counter;font-weight:600}.toc__item--2:before{content:counter(toc-counter,decimal-leading-zero);position:absolute;left:0;top:6px;color:var(--accent);font-weight:800;font-size:.78rem;font-family:var(--font-display)}.toc__item--3{padding-left:44px;font-size:.86rem;color:var(--fg-soft)}.toc__item--3:before{content:"–";position:absolute;left:28px;top:4px;color:var(--fg-muted)}.toc a{color:var(--fg-soft);text-decoration:none}.toc a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}.prose{font-size:1.04rem;color:var(--fg-soft)}.prose>p:first-of-type:first-letter{font-family:var(--font-display);font-weight:900;font-size:3.2rem;float:left;line-height:.9;margin:.18em .12em 0 0;color:var(--brand)}.prose h2{font-family:var(--font-display);margin:2.4em 0 .8em;font-size:1.45rem;font-weight:900;letter-spacing:-.01em;padding:12px 0 12px 16px;border-left:5px solid var(--accent);background:linear-gradient(90deg,color-mix(in oklab,var(--accent) 8%,transparent) 0%,transparent 80%);border-radius:0 8px 8px 0;scroll-margin-top:80px}.prose h3{font-family:var(--font-display);margin:2em 0 .6em;font-size:1.16rem;font-weight:800;padding-bottom:6px;border-bottom:2px dotted var(--border-strong);scroll-margin-top:80px}.prose h4{margin:1.6em 0 .5em;font-size:1.02rem;font-weight:700}.prose p{margin:0 0 1.3em}.prose strong{color:var(--fg);font-weight:700}.prose ul,.prose ol{margin:0 0 1.4em;padding-left:1.6em}.prose li{margin:.4em 0}.prose li::marker{color:var(--accent);font-weight:700}.prose blockquote{margin:1.6em 0;padding:16px 20px;border-left:4px solid var(--brand);background:color-mix(in oklab,var(--brand) 6%,var(--bg-soft));color:var(--fg-soft);border-radius:0 var(--radius) var(--radius) 0;font-size:.98rem}.prose blockquote>:first-child{margin-top:0}.prose blockquote>:last-child{margin-bottom:0}.prose blockquote strong:first-child{color:var(--brand);font-size:.84rem;letter-spacing:.06em;text-transform:uppercase;display:block;margin-bottom:6px}.prose code{font-family:var(--font-mono);font-size:.92em;background:var(--bg-soft);padding:2px 8px;border-radius:6px;border:1px solid var(--border);color:var(--accent)}.prose pre{background:var(--bg-soft);border:1px solid var(--border);padding:16px 18px;border-radius:var(--radius);overflow-x:auto;font-size:.92rem}.prose pre code{background:transparent;border:0;padding:0;color:inherit}.prose a{color:var(--brand);font-weight:600;word-break:break-word}.prose a:hover{text-decoration:underline;text-underline-offset:3px}.prose hr{margin:2.6em 0;border:0;border-top:1px dashed var(--border-strong)}.prose table{border-collapse:collapse;width:100%;margin:1.6em 0;font-size:.94rem;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.prose th,.prose td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--border);border-right:1px solid var(--border)}.prose th:last-child,.prose td:last-child{border-right:0}.prose tr:last-child td{border-bottom:0}.prose th{background:linear-gradient(180deg,color-mix(in oklab,var(--brand) 10%,transparent),color-mix(in oklab,var(--brand) 4%,transparent));color:var(--fg);font-weight:700}.prose tbody tr:nth-child(2n){background:var(--bg-soft)}@media(max-width:640px){.prose table{display:block;overflow-x:auto}}.aff-card{position:relative;margin:1.8em 0;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}.aff-card__pr{position:absolute;top:12px;right:14px;margin:0;font-size:.7rem;letter-spacing:.1em;color:var(--fg-muted);background:var(--bg-soft);padding:2px 8px;border-radius:4px;border:1px solid var(--border)}.aff-card__body{display:grid;grid-template-columns:130px 1fr;gap:18px;align-items:start}.aff-card__image{border-radius:8px;border:1px solid var(--border)}.aff-card__name{margin:0 0 6px;font-weight:800}.aff-card__price{margin:0 0 6px;color:var(--accent);font-weight:800}.aff-card__note{margin:0 0 12px;color:var(--fg-muted);font-size:.88rem}.aff-card__buy{display:inline-block;padding:10px 18px;background:linear-gradient(135deg,var(--brand),var(--brand-soft));color:#fff;border-radius:10px;font-weight:800;text-decoration:none;box-shadow:var(--shadow);transition:transform .15s ease}.aff-card__buy:hover{opacity:.95;text-decoration:none;transform:translateY(-1px)}@media(max-width:520px){.aff-card__body{grid-template-columns:1fr}}.static-page{max-width:var(--max-prose);margin:0 auto}.static-page h1{font-family:var(--font-display);font-size:clamp(1.6rem,3.6vw,2.2rem);margin:6px 0 22px;padding-bottom:14px;border-bottom:2px solid var(--border-strong);font-weight:900;letter-spacing:-.01em}.static-page h2{font-family:var(--font-display);margin:2em 0 .6em;font-size:1.25rem;font-weight:800;padding-left:14px;border-left:4px solid var(--accent)}.static-page p{margin:0 0 1.2em}.static-page ul{margin:0 0 1.4em;padding-left:1.5em}.static-page li{margin:.3em 0}.static-page li::marker{color:var(--accent)}.static-page code{font-family:var(--font-mono);font-size:.92em;background:var(--bg-soft);padding:2px 8px;border-radius:6px;border:1px solid var(--border);color:var(--accent)}.site-footer{border-top:1px solid var(--border);background:var(--bg-elev);margin-top:96px}.site-footer__inner{max-width:var(--max);margin:0 auto;padding:36px 24px;display:grid;gap:16px}.site-footer__name{margin:0;font-weight:800;font-family:var(--font-display);font-size:1.08rem}.site-footer__tag{margin:4px 0 0;color:var(--fg-muted);font-size:.92rem}.site-footer__nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:16px 22px}.site-footer__nav a{color:var(--fg-muted);font-size:.92rem;font-weight:500}.site-footer__nav a:hover{color:var(--brand)}.site-footer__copy{margin:8px 0 0;color:var(--fg-muted);font-size:.84rem}