/* Shared reading layer; existing calculators and menu imports retain their behavior. */
:root,html.light-mode{--font-display:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;--font-body:var(--font-display);--bg-color:#202722;--bg-gradient:none;--text-primary:#f3f2e9;--text-secondary:#c7cec3;--text-muted:#abb5a6;--primary-color:#c1d4ae;--primary-rgb:193,212,174;--secondary-color:#c1d4ae;--accent-color:#d9bc87;--card-bg:#28302a;--card-border:#475044;--card-border-hover:#8d9b80;--header-bg:#202722;--shadow-sm:none;--shadow-md:none;--shadow-lg:none;--shadow-glow:none;--border-radius-md:4px;--border-radius-lg:4px;--border-radius-full:4px}
html.light-mode{--bg-color:#f5f3ed;--text-primary:#242c28;--text-secondary:#505b51;--text-muted:#626e5e;--primary-color:#315840;--primary-rgb:49,88,64;--secondary-color:#315840;--accent-color:#805d2b;--card-bg:#fbfaf6;--card-border:#d4d7cc;--card-border-hover:#88967d;--header-bg:#f5f3ed;--nav-link-hover:#254d3e}
body{background-image:none;line-height:1.9}.text-gradient{-webkit-text-fill-color:currentColor;background:none;color:var(--text-primary)}.logo-symbol,.footer-logo,.btn-primary{background:var(--primary-color);color:var(--bg-color);box-shadow:none}.hero-blob{display:none}.hero-section{padding-top:120px;padding-bottom:36px}.hero-section h1{font-size:clamp(25px,4vw,40px);line-height:1.6;max-width:900px;margin-left:auto;margin-right:auto}.guide-card{border-radius:4px;box-shadow:none;line-height:1.95}.guide-card:hover{transform:none;box-shadow:none}.guide-card h2{line-height:1.6}.guide-card p,.guide-card li{line-height:1.95}.social-share-container{opacity:.85}.reading-next{padding:28px 0 48px;border-top:1px solid var(--card-border)}.reading-next h2{font-size:20px;margin-bottom:16px}.reading-next a{display:block;padding:12px 0;color:var(--primary-color);text-decoration:underline;text-underline-offset:4px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent-color);outline-offset:4px}[id]{scroll-margin-top:100px}html.light-mode input,html.light-mode select{background:#fff!important;color:#242c28!important}@media(max-width:600px){.guide-card{padding:22px 18px}.hero-section h1{font-size:26px}.visual-breadcrumbs{flex-wrap:wrap}.reading-next{padding-left:8px;padding-right:8px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(max-width:600px){header .logo{font-size:14px;gap:6px;white-space:nowrap}header .logo img{width:28px;height:28px}header .header-actions{gap:8px}header .header-actions .btn{padding:7px 9px;font-size:11px;white-space:nowrap}header .theme-toggle{width:32px;height:32px;flex-shrink:0}.calculator-container{padding:18px!important}}
@media(max-width:600px){header .container{padding-left:12px;padding-right:12px}header .logo{font-size:12px;gap:5px}header .logo img{width:24px;height:24px}header .header-actions .btn{font-size:10px;padding:7px}header .header-actions{gap:5px}}