:root{--accent: #6b8f71;--accent-dark: #4a6b4f;--nav-bg: #ffffff;--page-bg: #fafaf8;--card-bg: #ffffff;--black: 26, 26, 26;--gray: 140, 140, 140;--gray-light: 235, 235, 232;--gray-dark: 60, 60, 58;--gray-gradient: rgba(var(--gray-light), 50%), #fff;--box-shadow: 0 2px 16px rgba(0,0,0,.07)}body{font-family:Helvetica Neue,Arial,Hiragino Kaku Gothic ProN,Hiragino Sans,Meiryo,sans-serif;margin:0;padding:0;text-align:left;background:var(--page-bg);word-wrap:break-word;overflow-wrap:break-word;color:rgb(var(--black));font-size:15px;line-height:1.8}main{width:720px;max-width:calc(100% - 2em);margin:auto;padding:3em 1em}h1,h2,h3,h4,h5,h6{margin:0 0 .5rem;color:rgb(var(--black));line-height:1.2}h1{font-size:1.8em}h2{font-size:1.3em}h3{font-size:1.1em}h4{font-size:1em}h5{font-size:.9em}strong,b{font-weight:700}a,a:hover{color:var(--accent)}p{margin-bottom:1em}.prose p{margin-bottom:2em}textarea{width:100%;font-size:16px}input{font-size:16px}table{width:100%}img{max-width:100%;height:auto;border-radius:8px}code{padding:2px 5px;background-color:rgb(var(--gray-light));border-radius:2px}pre{padding:1.5em;border-radius:8px}pre>code{all:unset}blockquote{border-left:4px solid var(--accent);padding:0 0 0 20px;margin:0;font-size:1.333em}hr{border:none;border-top:1px solid rgb(var(--gray-light))}@media(max-width:720px){body{font-size:18px}main{padding:1em}}.buy-buttons{display:flex;flex-direction:row;gap:8px;margin:1.2em 0 1.8em}.buy-btn{flex:1;display:block;padding:12px 8px;border-radius:50px;text-align:center;font-weight:700;font-size:.85em;color:#fff!important;text-decoration:none!important;transition:opacity .2s}.buy-btn:hover{opacity:.82;color:#fff!important}.buy-btn.amazon{background:#f90}.buy-btn.rakuten{background:#bf0000}.buy-btn.yahoo{background:#6001d2}.buy-btn.official{background:#2c5282}@media(max-width:480px){.buy-buttons{flex-direction:column}}.sr-only{border:0;padding:0;margin:0;position:absolute!important;height:1px;width:1px;overflow:hidden;clip:rect(1px 1px 1px 1px);clip:rect(1px,1px,1px,1px);clip-path:inset(50%);white-space:nowrap}footer[data-astro-cid-sz7xmlte]{background:#1a1a1a;color:#ffffff73;text-align:center;padding:2.5rem 1rem}.footer-inner[data-astro-cid-sz7xmlte]{max-width:700px;margin:0 auto}.footer-logo[data-astro-cid-sz7xmlte]{margin:0 0 .4em;font-size:1rem;font-weight:700;letter-spacing:.1em;color:#ffffffbf}.footer-nav[data-astro-cid-sz7xmlte]{margin-bottom:.8rem;display:flex;justify-content:center;align-items:center;gap:.6rem}.footer-nav-sep[data-astro-cid-sz7xmlte]{color:#fff3;font-size:.7rem}.footer-nav[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{font-size:.7rem;color:#ffffff73;text-decoration:none;letter-spacing:.05em;border-bottom:1px solid rgba(255,255,255,.2);padding-bottom:1px;transition:color .15s}.footer-nav[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{color:#ffffffbf}.footer-copy[data-astro-cid-sz7xmlte]{margin:0;font-size:.7rem;letter-spacing:.06em}header[data-astro-cid-3ef6ksr2]{background:#fff;border-bottom:1px solid rgba(0,0,0,.07);position:sticky;top:0;z-index:100}.header-inner[data-astro-cid-3ef6ksr2]{max-width:1080px;margin:0 auto;padding:0 1.5rem;display:flex;align-items:center;justify-content:space-between;height:64px}.logo[data-astro-cid-3ef6ksr2]{text-decoration:none;display:flex;align-items:baseline;gap:.6em}.logo-main[data-astro-cid-3ef6ksr2]{font-size:1.25rem;font-weight:700;color:#1a1a1a;letter-spacing:.06em}.logo-divider[data-astro-cid-3ef6ksr2]{font-size:.75rem;color:#ccc;font-weight:300}.logo-sub[data-astro-cid-3ef6ksr2]{font-size:.72rem;color:#888;letter-spacing:.06em;font-weight:400}.logo-tagline[data-astro-cid-3ef6ksr2]{font-size:.65rem;color:#bbb;letter-spacing:.1em;font-weight:300;font-style:italic}.nav-links[data-astro-cid-3ef6ksr2]{display:flex;gap:2rem}.nav-links[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{font-size:.72rem;font-weight:600;letter-spacing:.12em;color:#555;text-decoration:none;transition:color .15s}.nav-links[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover{color:#1a1a1a}@media(max-width:720px){.logo-sub[data-astro-cid-3ef6ksr2],.logo-tagline[data-astro-cid-3ef6ksr2],.logo-divider[data-astro-cid-3ef6ksr2]{display:none}.nav-links[data-astro-cid-3ef6ksr2]{gap:1.2rem}}