:root{--color-bg: #fff;--color-bg-secondary: #f8fafc;--color-bg-tertiary: #f1f5f9;--color-bg-code: #f1f5f9;--color-text: #1f2937;--color-text-secondary: #6b7280;--color-text-tertiary: #9ca3af;--color-primary: #1e3a8a;--color-primary-light: #2563eb;--color-secondary: #3b82f6;--color-accent: #3b82f6;--color-accent-hover: #1e3a8a;--color-highlight: #f59e0b;--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-footer-bg: #1b2332;--color-footer-text: #cbd5e1;--font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "SF Mono", "Fira Code", monospace;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-bold: 700;--line-height-base: 1.8;--line-height-heading: 1.4;--line-height-prose: 2;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--max-width-container: 1200px;--max-width-article: 720px;--header-height: 64px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .05);--transition-fast: .15s ease;--transition-base: .2s ease}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-family:var(--font-sans);font-size:16px;line-height:var(--line-height-base);color:var(--color-text);background-color:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}body{min-height:100dvh;display:flex;flex-direction:column}main{flex:1}img{max-width:100%;height:auto;display:block}a{color:var(--color-accent);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-accent-hover)}.container{max-width:var(--max-width-container);margin-inline:auto;padding-inline:var(--space-lg)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:var(--space-xl)}.prose{max-width:var(--max-width-article);margin-inline:auto;line-height:var(--line-height-prose);font-size:1rem}.prose h2{font-size:1.5rem;font-weight:var(--font-weight-bold);line-height:var(--line-height-heading);margin-top:var(--space-3xl);margin-bottom:var(--space-lg);padding-bottom:var(--space-sm);border-bottom:1px solid var(--color-border)}.prose h3{font-size:1.25rem;font-weight:var(--font-weight-bold);line-height:var(--line-height-heading);margin-top:var(--space-2xl);margin-bottom:var(--space-md)}.prose h4{font-size:1.1rem;font-weight:var(--font-weight-medium);margin-top:var(--space-xl);margin-bottom:var(--space-sm)}.prose p{margin-bottom:var(--space-lg)}.prose ul,.prose ol{margin-bottom:var(--space-lg);padding-left:var(--space-xl)}.prose li{margin-bottom:var(--space-sm)}.prose li>ul,.prose li>ol{margin-top:var(--space-sm);margin-bottom:0}.prose blockquote{border-left:3px solid var(--color-accent);padding-left:var(--space-lg);margin-bottom:var(--space-lg);color:var(--color-text-secondary);font-style:italic}.prose code{font-family:var(--font-mono);font-size:.875em;background-color:var(--color-bg-code);padding:.15em .4em;border-radius:var(--radius-sm)}.prose pre{background-color:var(--color-bg-code);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-lg);margin-bottom:var(--space-lg);overflow-x:auto;font-size:.875rem;line-height:1.6}.prose pre code{background:none;padding:0;border-radius:0}.prose table{width:100%;border-collapse:collapse;margin-bottom:var(--space-lg);font-size:.9375rem}.prose th,.prose td{padding:var(--space-sm) var(--space-md);border:1px solid var(--color-border);text-align:left}.prose th{background-color:var(--color-bg-tertiary);font-weight:var(--font-weight-medium)}.prose img{border-radius:var(--radius-md);margin-block:var(--space-lg)}.prose a{text-decoration:underline;text-underline-offset:2px}.prose hr{border:none;border-top:1px solid var(--color-border);margin-block:var(--space-2xl)}.prose strong{font-weight:var(--font-weight-bold)}.site-header{position:sticky;top:0;z-index:100;height:var(--header-height);background-color:#ffffffd9;backdrop-filter:blur(8px);border-bottom:1px solid var(--color-border)}.site-header .container{display:flex;align-items:center;justify-content:space-between;height:100%}.site-header__logo{display:flex;align-items:center;gap:var(--space-sm);font-size:1rem;font-weight:var(--font-weight-bold);color:var(--color-text);flex-shrink:0}.site-header__logo:hover{color:var(--color-text)}.site-header__logo img{width:28px;height:28px}.site-header__logo-text{display:flex;flex-direction:column;line-height:1.2}.site-header__logo-sub{font-size:.625rem;font-weight:var(--font-weight-normal);color:var(--color-text-tertiary);letter-spacing:.02em}.site-header__nav{display:flex;gap:var(--space-lg)}.site-header__nav a{color:var(--color-text-secondary);font-size:.875rem;font-weight:var(--font-weight-medium);white-space:nowrap;transition:color var(--transition-fast)}.site-header__nav a:hover{color:var(--color-text)}.site-header__hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:36px;height:36px;padding:6px;background:none;border:none;cursor:pointer;z-index:201}.site-header__hamburger-line{display:block;width:100%;height:2px;background-color:var(--color-text);border-radius:1px;transition:transform .3s ease,opacity .3s ease}.site-header__hamburger.is-open .site-header__hamburger-line:nth-child(1){transform:translateY(7px) rotate(45deg)}.site-header__hamburger.is-open .site-header__hamburger-line:nth-child(2){opacity:0}.site-header__hamburger.is-open .site-header__hamburger-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.site-header__overlay{display:none;position:fixed;inset:0;z-index:99;background-color:#0006}.site-header__overlay.is-open{display:block}.site-footer{margin-top:var(--space-3xl);padding-block:var(--space-3xl) var(--space-2xl);background:linear-gradient(180deg,#1b2332,#111827 60%,#0c1220);color:var(--color-footer-text);font-size:.875rem}.site-footer a{color:var(--color-footer-text);transition:color var(--transition-fast)}.site-footer a:hover{color:#fff}.site-footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:var(--space-2xl);margin-bottom:var(--space-2xl)}.site-footer__brand{display:flex;flex-direction:column;gap:var(--space-md)}.site-footer__brand-logo{display:flex;align-items:center;gap:var(--space-sm)}.site-footer__brand-logo img{width:32px;height:32px}.site-footer__brand-name{color:#fff;font-weight:var(--font-weight-bold);font-size:.9375rem}.site-footer__brand-description{font-size:.8125rem;line-height:1.7;color:#94a3b8}.site-footer__section-title{color:#fff;font-weight:var(--font-weight-medium);font-size:.8125rem;margin-bottom:var(--space-md);text-transform:uppercase;letter-spacing:.05em}.site-footer__section-title--sub{margin-top:var(--space-lg)}.site-footer__list{list-style:none;display:flex;flex-direction:column;gap:var(--space-sm)}.site-footer__list a{font-size:.8125rem;color:#94a3b8}.site-footer__list a:hover{color:#fff}.site-footer__bottom{display:flex;align-items:center;justify-content:space-between;padding-top:var(--space-xl);border-top:1px solid rgba(255,255,255,.1);font-size:.8125rem;color:#64748b}.site-footer__bottom-links{display:flex;gap:var(--space-lg)}.site-footer__bottom-links a{color:#64748b;font-size:.8125rem}.site-footer__bottom-links a:hover{color:#94a3b8}.article-card{display:flex;flex-direction:column;border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;transition:box-shadow var(--transition-base);background:var(--color-bg)}.article-card:hover{box-shadow:var(--shadow-md)}.article-card__body{padding:var(--space-lg);display:flex;flex-direction:column;gap:var(--space-sm);flex:1}.article-card__title{font-size:1.0625rem;font-weight:var(--font-weight-bold);line-height:var(--line-height-heading);color:var(--color-text)}.article-card__title:hover{color:var(--color-accent)}.article-card__description{font-size:.875rem;color:var(--color-text-secondary);line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.article-card__meta{margin-top:auto;padding-top:var(--space-sm);display:flex;align-items:center;gap:var(--space-sm);font-size:.8125rem;color:var(--color-text-tertiary)}.category-badge{display:inline-block;padding:.15em .6em;font-size:.75rem;font-weight:var(--font-weight-medium);color:var(--color-primary);background-color:#eff6ff;border-radius:9999px;white-space:nowrap}.category-badge:hover{background-color:#dbeafe;color:var(--color-primary)}.tag{display:inline-block;padding:.15em .5em;font-size:.75rem;color:var(--color-text-secondary);background-color:var(--color-bg-tertiary);border-radius:var(--radius-sm)}.breadcrumb{display:flex;flex-wrap:wrap;gap:var(--space-xs);font-size:.8125rem;color:var(--color-text-tertiary);margin-bottom:var(--space-xl)}.breadcrumb a{color:var(--color-text-secondary)}.breadcrumb__separator{margin-inline:var(--space-xs)}.pagination{display:flex;justify-content:center;align-items:center;gap:var(--space-sm);margin-top:var(--space-3xl)}.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:2.5rem;height:2.5rem;padding-inline:var(--space-sm);border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:.875rem;color:var(--color-text-secondary);transition:all var(--transition-fast)}.pagination a:hover{background-color:var(--color-bg-tertiary);color:var(--color-text)}.pagination__current{background-color:var(--color-accent)!important;color:#fff!important;border-color:var(--color-accent)!important}.author-card{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-lg);background-color:var(--color-bg-secondary);border-radius:var(--radius-lg)}.author-card__avatar{width:48px;height:48px;border-radius:50%;background-color:var(--color-bg-tertiary);flex-shrink:0}.author-card__name{font-weight:var(--font-weight-medium);font-size:.9375rem}.author-card__bio{font-size:.8125rem;color:var(--color-text-secondary)}.toc{padding:var(--space-lg);background-color:var(--color-bg-secondary);border-radius:var(--radius-lg);margin-bottom:var(--space-2xl)}.toc__title{font-size:.875rem;font-weight:var(--font-weight-bold);margin-bottom:var(--space-md);color:var(--color-text-secondary)}.toc__list{list-style:none;padding:0}.toc__list li{margin-bottom:var(--space-xs)}.toc__list a{font-size:.875rem;color:var(--color-text-secondary);line-height:1.6}.toc__list a:hover{color:var(--color-accent)}.toc__list--nested{padding-left:var(--space-lg)}.page-hero{padding-block:var(--space-3xl);text-align:center}.page-hero__title{font-size:2rem;font-weight:var(--font-weight-bold);line-height:var(--line-height-heading);margin-bottom:var(--space-md)}.page-hero__description{font-size:1.0625rem;color:var(--color-text-secondary);max-width:600px;margin-inline:auto}.section{padding-block:var(--space-2xl)}.section__title{font-size:1.25rem;font-weight:var(--font-weight-bold);margin-bottom:var(--space-xl)}.not-found{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:50vh;text-align:center}.not-found__code{font-size:6rem;font-weight:var(--font-weight-bold);color:var(--color-border);line-height:1}.not-found__message{font-size:1.25rem;color:var(--color-text-secondary);margin-block:var(--space-lg)}@media(max-width:768px){:root{--header-height: 56px}.page-hero__title{font-size:1.5rem}.article-grid{grid-template-columns:1fr}.container{padding-inline:var(--space-md)}.prose h2{font-size:1.3rem}.prose h3{font-size:1.1rem}.site-footer__grid{grid-template-columns:1fr;gap:var(--space-xl)}.site-footer__bottom{flex-direction:column;gap:var(--space-md);text-align:center}.site-header__logo-text{display:none}.site-header__hamburger{display:flex}.site-header__nav{display:flex;flex-direction:column;position:fixed;top:0;right:0;width:280px;height:100dvh;padding:calc(var(--header-height) + var(--space-lg)) var(--space-xl) var(--space-xl);background-color:#fff;z-index:200;gap:0;transform:translate(100%);transition:transform .3s ease;overflow-y:auto}.site-header__nav.is-open{transform:translate(0)}.site-header__nav a{font-size:1rem;padding:var(--space-md) 0;border-bottom:1px solid var(--color-border)}}