:root{--color-background:#0d1117;--color-surface:#161b22;--color-primary:#8b5cf6;--color-primary-hover:#7c3aed;--color-bitcoin:#f2a900;--color-success:#22c55e;--color-warning:#f59e0b;--color-danger:#ef4444;--color-text:#f8fafc;--color-text-light:#cbd5e1;--color-border:#30363d;--radius:12px;--max-width:1024px;--transition:.25s}html{scroll-behavior:smooth}body{background:var(--color-background);color:var(--color-text);margin:0;font-family:Inter,Arial,sans-serif;font-size:18px;line-height:1.6}*{box-sizing:border-box}img{max-width:100%}a{color:inherit}main{min-height:calc(100vh - 160px)}.back-to-top{background:var(--color-primary);color:#fff;z-index:1000;border-radius:50%;justify-content:center;align-items:center;width:48px;height:48px;font-size:1.4rem;text-decoration:none;transition:all .2s;display:flex;position:fixed;bottom:24px;right:24px;box-shadow:0 10px 25px #00000059}.back-to-top:hover{background:#9061ff;transform:translateY(-4px)}main{width:100%;max-width:var(--max-width);margin:3rem auto;padding:0 2rem}h1{margin-bottom:2rem}header{z-index:1000;background:var(--color-surface);border-bottom:1px solid var(--color-border);position:sticky;top:0}.container{max-width:var(--max-width);justify-content:space-between;align-items:center;height:72px;margin:auto;padding:0 24px;display:flex}.logo{color:var(--color-text);align-items:center;gap:.7rem;font-size:1.3rem;font-weight:700;text-decoration:none;display:flex}.logo-icon{color:var(--color-primary);font-size:1.4rem}nav{gap:2rem;display:flex}nav a{color:var(--color-text-light);text-decoration:none;transition:all .2s}nav a:hover{color:var(--color-primary)}.menu-toggle{color:#fff;cursor:pointer;background:0 0;border:none;font-size:1.8rem;display:none}@media (width<=768px){.container{flex-wrap:wrap;height:auto;padding:1rem}.menu-toggle{display:block}nav{flex-direction:column;gap:.5rem;width:100%;margin-top:1rem;display:none}nav.open{display:flex}nav a{border-radius:8px;padding:.8rem}nav a:hover{background:#ffffff0d}}.cards{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem;display:grid}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);color:inherit;transition:all var(--transition);padding:1.5rem;text-decoration:none;display:block}.card:hover{border-color:var(--color-primary);transform:translateY(-6px);box-shadow:0 12px 35px #7c3aed40}.card-header{align-items:flex-start;gap:1rem;display:flex}.card-logo{object-fit:contain;flex-shrink:0;width:48px;height:48px}.card-content{flex:1}.card-content h2{margin:0 0 .6rem;font-size:2rem}.card-content p{color:var(--color-text-light);margin:0 0 1rem;line-height:1.6}.card-content span{color:var(--color-primary);font-weight:600;transition:color .2s}.card:hover .card-content span{color:#9f7aea}@media (width<=768px){.container{flex-direction:column;gap:1rem;height:auto;padding:1rem}nav{flex-wrap:wrap;justify-content:center;gap:1rem}}article{width:100%;margin:auto;padding:2rem 0 4rem;line-height:1.6}.article-header{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);align-items:center;gap:1.5rem;margin-bottom:3rem;padding:1.5rem;display:flex;box-shadow:0 8px 24px #00000040}.article-logo{object-fit:contain;flex-shrink:0;width:72px;height:72px}.article-title{flex:1}.article-title h1{margin:0;font-size:2.6rem;line-height:1.1}.article-description{color:var(--color-text-light);margin-top:.4rem;font-size:1.1rem}article h2{border-bottom:1px solid var(--color-border);margin-top:3rem;margin-bottom:.8rem;padding-bottom:.4rem;font-size:2rem}article h3{margin-top:2rem;margin-bottom:.6rem;font-size:1.5rem}article p{margin:.8rem 0}article ul,article ol{margin:.8rem 0;padding-left:1.5rem}article li{margin-bottom:.4rem}article strong{color:#fff;font-weight:700}article em{font-style:italic}article a{color:var(--color-primary);text-decoration:none}article a:hover{text-decoration:underline}article table{border-collapse:collapse;width:100%;margin:2rem 0}article th{background:var(--color-surface)}article th,article td{border:1px solid var(--color-border);text-align:left;padding:.75rem}article img{border-radius:var(--radius);max-width:100%;height:auto;margin:2rem auto;display:block}article code{background:var(--color-surface);border-radius:4px;padding:.15rem .35rem}article pre{background:var(--color-surface);border-radius:var(--radius);padding:1rem;overflow-x:auto}article hr{border:none;border-top:1px solid var(--color-border);margin:2.5rem 0}@media (width<=768px){article{padding:1rem 0 3rem}.article-header{gap:1rem;margin-bottom:2rem;padding:1rem}.article-logo{width:56px;height:56px}.article-title h1{font-size:2rem}.article-description{font-size:.95rem}article h2{font-size:1.7rem}}.article-header{transition:opacity .3s,transform .3s,max-height .3s,margin .3s,padding .3s}.article-header.hidden{opacity:0;border:none;max-height:0;margin:0;padding-top:0;padding-bottom:0;overflow:hidden;transform:translateY(-20px)}