*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-primary: #1a56db;--color-primary-dark: #1e40af;--color-text: #1f2937;--color-text-muted: #6b7280;--color-bg: #ffffff;--color-bg-secondary: #f9fafb;--color-border: #e5e7eb;--color-accent: #ef4444;--font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;--font-size-base: 16px;--line-height-body: 1.8;--content-width: 720px;--site-width: 1200px}html{font-size:var(--font-size-base);scroll-behavior:smooth}body{font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);line-height:var(--line-height-body);-webkit-font-smoothing:antialiased}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:block}.site-wrapper{max-width:var(--site-width);margin:0 auto;padding:0 1rem}.content-wrapper{max-width:var(--content-width);margin:0 auto}.site-header{background:#fff;border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:100;box-shadow:0 1px 3px #0000000d}.site-header__inner{max-width:var(--site-width);margin:0 auto;padding:0 1rem;display:flex;align-items:center;justify-content:space-between;height:60px;gap:1rem}.site-header__logo a{font-size:1.25rem;font-weight:700;color:var(--color-text);white-space:nowrap}.site-header__nav{display:flex;gap:1.25rem;align-items:center;flex-wrap:wrap}.site-header__nav a{color:var(--color-text-muted);font-size:.9rem;white-space:nowrap;transition:color .2s}.site-header__nav a:hover{color:var(--color-primary);text-decoration:none}.search-form{display:flex;align-items:center;gap:.5rem}.search-form input[type=search]{border:1px solid var(--color-border);border-radius:20px;padding:.35rem .9rem;font-size:.875rem;width:180px;outline:none;transition:border-color .2s,width .3s}.search-form input[type=search]:focus{border-color:var(--color-primary);width:240px}.site-main{min-height:calc(100vh - 120px);padding:2rem 0}.posts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.post-card{background:#fff;border:1px solid var(--color-border);border-radius:8px;overflow:hidden;transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}.post-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.post-card__thumbnail{aspect-ratio:16/9;overflow:hidden;background:var(--color-bg-secondary)}.post-card__thumbnail img{width:100%;height:100%;object-fit:cover}.post-card__thumbnail-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:2rem;color:var(--color-border)}.post-card__body{padding:1.25rem;flex:1;display:flex;flex-direction:column;gap:.5rem}.post-card__category{font-size:.75rem;color:var(--color-primary);font-weight:600;text-transform:uppercase;letter-spacing:.05em}.post-card__title{font-size:1rem;font-weight:700;line-height:1.5}.post-card__title a{color:var(--color-text)}.post-card__title a:hover{color:var(--color-primary);text-decoration:none}.post-card__excerpt{font-size:.875rem;color:var(--color-text-muted);line-height:1.6;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.post-card__meta{font-size:.8rem;color:var(--color-text-muted);margin-top:auto}.post-header{margin-bottom:2rem}.post-header__categories{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:.75rem}.post-header__category-link{background:var(--color-primary);color:#fff!important;padding:.2rem .6rem;border-radius:4px;font-size:.75rem;font-weight:600}.post-header__title{font-size:clamp(1.5rem,4vw,2.25rem);font-weight:800;line-height:1.4;margin-bottom:1rem}.post-header__meta{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;font-size:.875rem;color:var(--color-text-muted)}.post-header__thumbnail{margin-top:1.5rem;border-radius:8px;overflow:hidden}.post-content{font-size:1rem;line-height:var(--line-height-body)}.post-content h2{font-size:1.5rem;font-weight:700;margin:2.5rem 0 1rem;padding-bottom:.5rem;border-bottom:2px solid var(--color-primary);scroll-margin-top:80px}.post-content h3{font-size:1.25rem;font-weight:700;margin:2rem 0 .75rem;scroll-margin-top:80px}.post-content h4{font-size:1.1rem;font-weight:700;margin:1.5rem 0 .5rem;scroll-margin-top:80px}.post-content p{margin-bottom:1.25rem}.post-content a{border-bottom:1px solid var(--color-primary)}.post-content a:hover{text-decoration:none;opacity:.8}.post-content ul,.post-content ol{margin:0 0 1.25rem 1.5rem}.post-content li{margin-bottom:.4rem}.post-content blockquote{border-left:4px solid var(--color-primary);padding:.75rem 1rem;margin:1.5rem 0;background:var(--color-bg-secondary);border-radius:0 4px 4px 0}.post-content blockquote p{margin:0}.post-content pre{background:#1e293b;color:#e2e8f0;padding:1.25rem;border-radius:8px;overflow-x:auto;margin-bottom:1.25rem;font-size:.875rem;line-height:1.6}.post-content code{font-family:Fira Code,Courier New,monospace;font-size:.875em;background:var(--color-bg-secondary);padding:.15em .4em;border-radius:3px}.post-content pre code{background:none;padding:0;font-size:1em}.post-content img{border-radius:6px;margin:1.5rem auto}.post-content table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.9rem}.post-content th,.post-content td{border:1px solid var(--color-border);padding:.6rem .8rem;text-align:left}.post-content th{background:var(--color-bg-secondary);font-weight:700}.toc{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:8px;padding:1.25rem 1.5rem;margin:2rem 0}.toc__title{font-weight:700;margin-bottom:.75rem;font-size:.95rem}.toc ol{margin:0;padding-left:1.25rem}.toc li{margin-bottom:.3rem;font-size:.875rem;line-height:1.5}.toc a{color:var(--color-text-muted);border:none}.toc a:hover{color:var(--color-primary)}.reading-time{font-size:.8rem;color:var(--color-text-muted)}.share-buttons{display:flex;gap:.75rem;flex-wrap:wrap;margin:2rem 0}.share-btn{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem 1rem;border-radius:6px;font-size:.875rem;font-weight:600;color:#fff!important;border:none;text-decoration:none!important;transition:opacity .2s}.share-btn:hover{opacity:.85}.share-btn--x{background:#000}.share-btn--hatena{background:#00a4de}.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:2.5rem 0;border-top:1px solid var(--color-border);padding-top:2rem}.post-nav__item{padding:1rem;border:1px solid var(--color-border);border-radius:8px;transition:background .2s}.post-nav__item:hover{background:var(--color-bg-secondary)}.post-nav__label{font-size:.75rem;color:var(--color-text-muted);margin-bottom:.35rem}.post-nav__title{font-size:.9rem;font-weight:600;line-height:1.4;color:var(--color-text)}.post-nav__item--prev{grid-column:1}.post-nav__item--next{grid-column:2;text-align:right}.related-posts{margin:2.5rem 0}.related-posts__title{font-size:1.1rem;font-weight:700;margin-bottom:1rem}.related-posts__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.pagination{display:flex;justify-content:center;gap:.5rem;margin:2rem 0;flex-wrap:wrap}.pagination__link{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 .75rem;border:1px solid var(--color-border);border-radius:6px;font-size:.875rem;color:var(--color-text);transition:all .2s}.pagination__link:hover,.pagination__link--current{background:var(--color-primary);border-color:var(--color-primary);color:#fff;text-decoration:none}.pagination__link--disabled{opacity:.4;pointer-events:none}.tag-list{display:flex;gap:.5rem;flex-wrap:wrap;margin:.75rem 0}.tag-link{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:20px;padding:.2rem .65rem;font-size:.8rem;color:var(--color-text-muted);transition:all .2s}.tag-link:hover{border-color:var(--color-primary);color:var(--color-primary);text-decoration:none}.site-footer{background:var(--color-bg-secondary);border-top:1px solid var(--color-border);padding:2rem 0;margin-top:3rem;text-align:center;font-size:.875rem;color:var(--color-text-muted)}.archive-year{margin-bottom:2rem}.archive-year__title{font-size:1.25rem;font-weight:700;margin-bottom:.75rem;padding-bottom:.5rem;border-bottom:2px solid var(--color-border)}.archive-month{margin-bottom:1rem}.archive-month__title{font-size:1rem;font-weight:600;color:var(--color-text-muted);margin-bottom:.5rem;margin-left:1rem}.archive-list{list-style:none;margin-left:2rem}.archive-list li{padding:.4rem 0;border-bottom:1px dotted var(--color-border);display:flex;align-items:baseline;gap:.75rem}.archive-list__date{font-size:.8rem;color:var(--color-text-muted);white-space:nowrap}.error-page{text-align:center;padding:4rem 1rem}.error-page__code{font-size:6rem;font-weight:900;color:var(--color-border);line-height:1}.error-page__title{font-size:1.5rem;font-weight:700;margin:1rem 0}.error-page__text{color:var(--color-text-muted);margin-bottom:2rem}#search{margin:1rem 0}@media (max-width: 768px){.site-header__nav{display:none}.posts-grid,.post-nav{grid-template-columns:1fr}.post-nav__item--next{grid-column:1;text-align:left}.related-posts__grid{grid-template-columns:1fr}.search-form input[type=search]{width:140px}}@media (max-width: 480px){.post-header__title{font-size:1.4rem}}