:root{--bg-primary:#ffffff;--bg-secondary:#f8f9fa;--bg-card:#ffffff;--text-primary:#333333;--text-secondary:#636e72;--border-color:#e1e8ed;--shadow:rgba(0,0,0,0.1);--shadow-hover:rgba(0,0,0,0.15);--accent:#4a5568;--accent-dark:#2d3748;--input-bg:#ffffff}[data-theme=dark]{--bg-primary:#1a202c;--bg-secondary:#2d3748;--bg-card:#2d3748;--text-primary:#e2e8f0;--text-secondary:#a0aec0;--border-color:#4a5568;--shadow:rgba(0,0,0,0.3);--shadow-hover:rgba(0,0,0,0.5);--accent:#63b3ed;--accent-dark:#4299e1;--input-bg:#2d3748}*{box-sizing:border-box;padding:0;margin:0}body,html{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:var(--text-primary);background:var(--bg-primary);transition:background-color .3s ease,color .3s ease}a{color:inherit;text-decoration:none}a:hover{opacity:.8}.header{background:var(--bg-card);box-shadow:0 2px 4px var(--shadow);position:-webkit-sticky;position:sticky;top:0;z-index:100}.nav-container{max-width:1200px;margin:0 auto;padding:0 1rem;display:flex;justify-content:space-between;align-items:center;height:60px}.nav-logo{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.theme-toggle-switch{position:relative;width:44px;height:22px;background:#e1e8ed;border:none;border-radius:11px;cursor:pointer;margin-right:1.5rem;transition:background .3s;display:flex;align-items:center;justify-content:space-between;padding:0 5px;font-size:10px}.theme-toggle-switch:before{content:"☀";color:#888;z-index:1;line-height:1}.theme-toggle-switch:after{content:"☾";color:#888;z-index:1;line-height:1}[data-theme=dark] .theme-toggle-switch{background:#4a5568}.theme-toggle-switch:hover{opacity:.8}.toggle-slider{position:absolute;top:2px;left:2px;width:18px;height:18px;background:white;border-radius:50%;transition:transform .3s;box-shadow:0 2px 4px rgba(0,0,0,.2);z-index:2}.toggle-slider.active{transform:translateX(22px)}.nav-menu-container{position:relative}.nav-menu{position:absolute;top:45px;right:0;background:var(--bg-card);box-shadow:0 4px 10px var(--shadow);display:none;flex-direction:column;gap:0;padding:1rem;border:1px solid var(--border-color);border-radius:8px;min-width:200px;width:auto;list-style:none;z-index:1000}.nav-menu.open{display:flex}.nav-menu li{padding:.6rem 0}.nav-menu a,.nav-toggle{display:block}.nav-toggle{background:none;border:none;cursor:pointer}.nav-toggle .bar{display:block;width:24px;height:2px;background:var(--text-primary);margin:5px 0;transition:all .2s ease}.nav-menu a{font-weight:500;transition:color .2s}.nav-menu a:hover{color:var(--accent)}.main{min-height:calc(100vh - 120px)}.home{max-width:1200px;margin:0 auto;padding:0 1rem}.hero{background:linear-gradient(135deg,var(--accent) 0,var(--accent-dark) 100%);color:white;padding:4rem 2rem;text-align:center;margin:2rem 0;border-radius:12px}.hero h1{font-size:3rem;margin-bottom:1rem;font-weight:700}.hero p{font-size:1.2rem;max-width:600px;margin:0 auto 1rem}.search-bar{max-width:800px;margin:3rem auto 2rem;padding:0 1rem}.search-input{width:100%;padding:1rem 1.5rem;font-size:1rem;border:2px solid var(--border-color);border-radius:50px;outline:none;transition:border-color .2s,box-shadow .2s;background:var(--input-bg);color:var(--text-primary)}.search-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--shadow)}.search-input::placeholder{color:#a0aec0}.search-results-count{margin-top:1rem;text-align:center;color:var(--text-secondary);font-size:.95rem}.categories{margin:4rem 0}.categories h2{text-align:center;margin-bottom:2rem;font-size:2.5rem;color:var(--text-primary)}.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:1.2rem;gap:1.2rem;margin-top:2rem}.category-card{background:var(--bg-card);padding:1.2rem;border-radius:10px;box-shadow:0 2px 4px var(--shadow);transition:transform .2s,box-shadow .2s;border:1px solid var(--border-color)}.category-card:hover{transform:translateY(-2px);box-shadow:0 4px 8px var(--shadow-hover)}.category-card h3{font-size:1.1rem;margin-bottom:.5rem;color:var(--text-primary)}.category-card p{color:var(--text-secondary);font-size:.9rem}.featured-posts{margin:4rem 0}.featured-posts h2{text-align:center;margin-bottom:2rem;font-size:2.5rem;color:var(--text-primary)}.posts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));grid-gap:2rem;gap:2rem}.post-card{background:var(--bg-card);padding:2rem;border-radius:12px;box-shadow:0 4px 6px var(--shadow);transition:transform .2s,box-shadow .2s;border:1px solid var(--border-color)}.post-card:hover{transform:translateY(-4px);box-shadow:0 8px 15px var(--shadow-hover)}.post-card h3{font-size:1.3rem;margin-bottom:1rem;color:var(--text-primary);line-height:1.4}.post-card p{color:var(--text-secondary);margin-bottom:1rem}.post-meta{display:flex;justify-content:space-between;align-items:center;font-size:.9rem}.category{background:var(--accent);color:white;padding:.25rem .75rem;border-radius:20px;font-size:.8rem;font-weight:500}.date{color:var(--text-secondary)}.post{max-width:800px;margin:0 auto;padding:2rem 1rem}.post-header{margin-bottom:3rem;text-align:center}.post-header h1{font-size:2.5rem;margin-bottom:1rem;color:var(--text-primary);line-height:1.2}.post-excerpt{font-size:1.2rem;color:var(--text-secondary);max-width:600px;margin:0 auto}.post-content{font-size:1.1rem;line-height:1.8}.post-content img{max-width:100%;height:auto;border-radius:8px;margin:1.5rem 0;box-shadow:0 4px 12px rgba(0,0,0,.1)}.post-content h1,.post-content h2,.post-content h3{margin:2rem 0 1rem;color:var(--text-primary)}.post-content h2{font-size:1.8rem;border-bottom:2px solid var(--accent);padding-bottom:.5rem}.post-content h3{font-size:1.4rem;color:var(--accent)}.post-content p{margin-bottom:1.5rem}.post-content ol,.post-content ul{margin-bottom:1.5rem;padding-left:2rem}.post-content li{margin-bottom:.5rem}.post-content strong{color:var(--text-primary);font-weight:600}.post-content code{background:var(--bg-secondary);padding:.2rem .4rem;border-radius:4px;font-family:Monaco,Menlo,monospace;font-size:.9rem;color:var(--text-primary)}.post-content blockquote{border-left:4px solid var(--accent);padding-left:1rem;margin:1.5rem 0;font-style:italic;color:var(--text-secondary)}.footer{background:var(--accent-dark);color:white;text-align:center;padding:2rem;margin-top:4rem}@media (max-width:768px){.nav-menu{top:25px;left:auto;width:200px;min-width:auto;border-radius:8px;border:1px solid var(--border-color);border-bottom:none;z-index:1000;padding:1rem}.hero h1{font-size:2rem}.hero p{font-size:1rem}.category-grid,.posts-grid{grid-template-columns:1fr}.post-header h1{font-size:2rem}}