/* Black Bros Crypto — AdSense-ready static site system */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
:root{
  --bg:#ffffff;--ink:#0f172a;--muted:#64748b;--soft:#f8fafc;--line:#e5e7eb;
  --card:#ffffff;--accent:#16a34a;--accent2:#06b6d4;--accentDark:#0f766e;
  --shadow:0 16px 38px rgba(2,6,23,.07);--radius:18px;--radius2:26px;
  --max:1180px;--content:840px;--pad:20px;--focus:#2563eb44;
}
body{font:16px/1.75 ui-sans-serif,system-ui,-apple-system,Segoe UI,Inter,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);text-rendering:optimizeLegibility}
a{color:var(--accentDark);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:10px}
p{margin:0 0 14px}ul,ol{padding-left:1.35rem}li{margin:.35rem 0}h1,h2,h3,h4{line-height:1.25;margin:0 0 12px}h1{font-size:clamp(30px,5vw,54px);letter-spacing:-.045em}h2{font-size:clamp(23px,3.2vw,34px);letter-spacing:-.025em}h3{font-size:clamp(19px,2vw,23px)}img,svg{max-width:100%;height:auto;display:block}
.container{max-width:var(--max);margin-inline:auto;padding-inline:var(--pad)}.narrow{max-width:var(--content);margin-inline:auto}.section{padding-block:40px}.section-tight{padding-block:24px}.muted{color:var(--muted)}.eyebrow{font-weight:900;letter-spacing:.1em;text-transform:uppercase;color:var(--accentDark);font-size:.78rem}.small{font-size:.92rem}.skip-link{position:absolute;left:-9999px;top:auto}.skip-link:focus{left:16px;top:16px;position:fixed;z-index:999;background:#111827;color:#fff;padding:10px 14px;border-radius:12px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.soft{background:linear-gradient(180deg,#ffffff,#f8fafc)}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:1fr}.grid-3{grid-template-columns:1fr}@media(min-width:900px){.grid-2{grid-template-columns:1.7fr .9fr}.grid-3{grid-template-columns:repeat(3,1fr)}}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;gap:16px;min-height:72px}.brand{display:flex;align-items:center;gap:12px;font-weight:1000;color:#0f172a;text-decoration:none}.brand:hover{text-decoration:none}.logo{width:42px;height:42px;border-radius:14px;border:1px solid var(--line);background:#fff;box-shadow:0 8px 18px rgba(2,6,23,.06)}.brand span{letter-spacing:-.03em}.grow{flex:1}.menu{display:flex;align-items:center;gap:6px;overflow:auto;scrollbar-width:none}.menu::-webkit-scrollbar{display:none}.menu a{color:#111827;font-weight:800;font-size:.95rem;white-space:nowrap;padding:9px 10px;border-radius:999px}.menu a:hover{background:#f1f5f9;text-decoration:none}.menu a.active{background:#ecfeff;color:#0f766e}@media(max-width:760px){.nav{flex-direction:column;align-items:flex-start;padding-block:12px}.menu{width:100%;padding-bottom:4px}.menu a{padding:8px 9px}}
.hero{padding:44px 0 34px;background:radial-gradient(circle at top left,#ecfeff 0,#fff 38%,#fff 100%);border-bottom:1px solid var(--line)}.hero-wrap{display:grid;gap:24px;align-items:center}.hero p.lead{font-size:clamp(17px,2vw,20px);color:#334155;max-width:790px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:999px;padding:11px 17px;font-weight:900;background:#fff;color:#111827;box-shadow:0 10px 22px rgba(2,6,23,.06)}.btn:hover{text-decoration:none;transform:translateY(-1px)}.btn-primary{background:linear-gradient(90deg,var(--accent),var(--accent2));color:#fff;border-color:transparent}.statbar{display:grid;grid-template-columns:1fr;gap:12px;margin-top:22px}.statbar div{border:1px solid var(--line);background:#fff;border-radius:16px;padding:14px}.statbar strong{display:block;font-size:1.08rem}@media(min-width:800px){.statbar{grid-template-columns:repeat(3,1fr)}}
.article-layout{display:grid;gap:24px;align-items:start}.toc{position:sticky;top:92px}.toc a{display:block;color:#334155;padding:8px 0;border-bottom:1px dashed var(--line)}.toc a:hover{color:#0f766e;text-decoration:none}.article{max-width:var(--content)}.article h2{margin-top:34px}.article h3{margin-top:24px}.article blockquote{margin:20px 0;padding:16px 18px;border-left:4px solid var(--accent);background:#f8fafc;border-radius:0 16px 16px 0}.note{border-left:4px solid var(--accent2);background:#f8fafc;padding:16px;border-radius:0 16px 16px 0}.warning{border-left:4px solid #f59e0b;background:#fffbeb;padding:16px;border-radius:0 16px 16px 0}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px;margin:18px 0}table{width:100%;border-collapse:collapse;min-width:680px}th,td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:#f8fafc}tr:last-child td{border-bottom:0}.post-list{display:grid;gap:16px}.post-card{display:block;padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow);color:inherit}.post-card:hover{text-decoration:none;border-color:#bae6fd;transform:translateY(-1px)}.post-card h3{color:#0f172a}.tag{display:inline-flex;padding:4px 9px;background:#ecfeff;border:1px solid #cffafe;border-radius:999px;color:#0f766e;font-size:.78rem;font-weight:900;margin:0 6px 6px 0}.input,textarea,select{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;font:inherit;background:#fff}textarea{min-height:260px;resize:vertical}.tool-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}button.btn{cursor:pointer}.result{white-space:pre-wrap;border:1px dashed var(--line);background:#fff;border-radius:14px;padding:14px;margin-top:14px}.ad-note{border:1px dashed var(--line);border-radius:16px;background:#fff;padding:12px;color:var(--muted);font-size:.9rem;text-align:center}
footer{border-top:1px solid var(--line);background:#fff;margin-top:36px}.footer-grid{display:grid;gap:20px}.footer-grid ul{list-style:none;margin:0;padding:0}.footer-grid li{margin:7px 0}.subfoot{border-top:1px solid var(--line);padding:14px 0;display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap;color:var(--muted);font-size:.92rem}@media(min-width:900px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr}}