/* Advance Bit Coin — Learn hub shared styles (matches main site tokens) */
:root{
  --ink:#0A0908; --panel:#14110D; --cream:#F5F2EC; --mute:#9A958C;
  --gold:#F59E0B; --gold-soft:#FBBF24; --gold-deep:#B45309;
  --brass:#C9A36B; --oxblood:#A83236; --mint:#34D399;
  --line:rgba(255,255,255,.08); --glass:rgba(255,255,255,.03);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--ink);color:var(--cream);font-family:'Exo 2',system-ui,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.mesh{position:fixed;inset:0;z-index:-1;pointer-events:none;background:
  radial-gradient(50% 40% at 15% 8%,rgba(201,163,107,.13),transparent 60%),
  radial-gradient(45% 45% at 85% 12%,rgba(142,42,47,.18),transparent 60%),
  radial-gradient(60% 50% at 50% 100%,rgba(245,158,11,.07),transparent 60%)}
a{color:var(--gold-soft);text-decoration:none}
a:hover{color:var(--gold)}

/* nav */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(10,9,8,.72);border-bottom:1px solid var(--line)}
.nav-in{max-width:1100px;margin:0 auto;padding:.7rem 1rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;color:var(--cream)}
.badge{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;
  background:linear-gradient(180deg,var(--gold-soft),var(--gold-deep));border:1px solid rgba(251,191,36,.7);
  font-family:Orbitron,sans-serif;font-weight:800;font-size:7px;color:#1A1206;letter-spacing:-.02em}
.word{font-family:Orbitron,sans-serif;font-weight:700;font-size:15px;letter-spacing:.04em}
.word em{font-style:normal;background:linear-gradient(180deg,var(--gold-soft),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;align-items:center;gap:1.1rem;font-size:.9rem}
.nav-links a{color:var(--mute)}
.nav-links a:hover{color:#fff}
.btn{display:inline-block;padding:.55rem 1.2rem;border-radius:999px;font-weight:600;font-size:.88rem;color:#1A1206 !important;
  background:linear-gradient(180deg,var(--gold-soft),var(--gold-deep));border:1px solid rgba(251,191,36,.7);
  box-shadow:0 0 22px rgba(245,158,11,.28);transition:filter .2s}
.btn:hover{filter:brightness(1.1)}

/* layout */
.hero{max-width:860px;margin:0 auto;padding:3.2rem 1rem 1rem;text-align:left}
.eyebrow{font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--brass);font-weight:600}
h1{font-family:Orbitron,sans-serif;font-weight:800;font-size:clamp(1.7rem,4.6vw,2.6rem);line-height:1.18;margin:.6rem 0 .9rem;
  background:linear-gradient(180deg,#fff 30%,var(--gold-soft));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--mute);font-size:1.03rem;max-width:46rem}
.meta{display:flex;flex-wrap:wrap;gap:.9rem;color:var(--mute);font-size:.8rem;margin-top:1rem}
.wrap{max-width:860px;margin:0 auto;padding:1.2rem 1rem 4rem}
.crumbs{font-size:.78rem;color:var(--mute);margin:1.4rem auto 0;max-width:860px;padding:0 1rem}
.crumbs a{color:var(--mute)} .crumbs a:hover{color:var(--gold-soft)}

/* article */
article h2{font-family:Orbitron,sans-serif;font-weight:700;font-size:1.28rem;margin:2.4rem 0 .8rem;color:#fff}
article h2::before{content:"";display:inline-block;width:1.1rem;height:2px;background:linear-gradient(90deg,var(--gold),transparent);margin-right:.55rem;vertical-align:middle}
article h3{font-family:Orbitron,sans-serif;font-weight:600;font-size:1.02rem;margin:1.6rem 0 .5rem;color:var(--gold-soft)}
article p{margin:.8rem 0;color:#DAD6CE}
article ul,article ol{margin:.8rem 0 .8rem 1.4rem;color:#DAD6CE}
article li{margin:.45rem 0}
article strong{color:#fff}
code{font-family:ui-monospace,Consolas,monospace;font-size:.82em;background:var(--glass);border:1px solid var(--line);border-radius:6px;padding:.12em .4em;word-break:break-all;color:var(--gold-soft)}

/* components */
.card{background:var(--glass);border:1px solid var(--line);border-radius:16px;padding:1.2rem 1.3rem;margin:1.2rem 0}
.card.goldline{border-color:rgba(245,158,11,.28);box-shadow:0 0 30px rgba(245,158,11,.06) inset}
.note{border-left:3px solid var(--gold);background:rgba(245,158,11,.05);border-radius:0 12px 12px 0;padding:.9rem 1.1rem;margin:1.4rem 0;font-size:.9rem;color:var(--mute)}
table{width:100%;border-collapse:collapse;margin:1.2rem 0;font-size:.92rem}
th{font-family:Orbitron,sans-serif;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--brass);text-align:left;padding:.6rem .8rem;border-bottom:1px solid rgba(245,158,11,.3)}
td{padding:.6rem .8rem;border-bottom:1px solid var(--line);color:#DAD6CE}
.table-scroll{overflow-x:auto}
details{background:var(--glass);border:1px solid var(--line);border-radius:14px;margin:.7rem 0;padding:0}
summary{cursor:pointer;padding:.95rem 1.15rem;font-weight:600;color:#fff;list-style:none;position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:1.1rem;color:var(--gold);font-weight:700}
details[open] summary::after{content:"–"}
details p{padding:0 1.15rem 1rem;margin:0;color:var(--mute)}
.cta{background:linear-gradient(180deg,rgba(245,158,11,.10),rgba(245,158,11,.03));border:1px solid rgba(245,158,11,.35);border-radius:18px;padding:1.6rem;margin:2.6rem 0 0;text-align:center}
.cta h2{margin:0 0 .4rem}.cta h2::before{display:none}
.cta p{color:var(--mute);margin:.3rem 0 1.1rem}

/* hub grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem;margin:1.6rem 0}
.tile{display:block;background:var(--glass);border:1px solid var(--line);border-radius:16px;padding:1.15rem 1.2rem;transition:border-color .2s,transform .2s;color:var(--cream)}
.tile:hover{border-color:rgba(245,158,11,.45);transform:translateY(-2px);color:var(--cream)}
.tile .t-eyebrow{font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;color:var(--brass)}
.tile h2,.tile h3{font-family:Orbitron,sans-serif;font-size:1rem;font-weight:700;margin:.45rem 0 .4rem;color:#fff}
.tile p{font-size:.86rem;color:var(--mute);margin:0}

/* footer */
.foot{border-top:1px solid var(--line);margin-top:3rem}
.foot-in{max-width:1100px;margin:0 auto;padding:2rem 1rem;font-size:.85rem}
.foot-links{display:flex;flex-wrap:wrap;gap:.4rem 1.4rem;margin-bottom:1.2rem}
.foot-links a{color:var(--mute)} .foot-links a:hover{color:var(--gold-soft)}
.foot-legal{display:flex;flex-wrap:wrap;gap:1.2rem;margin-bottom:1rem}
.foot-legal a{color:var(--mute);font-size:.78rem}
.foot p{color:var(--mute);font-size:.75rem}
@media (max-width:560px){.word{font-size:13px}.nav-links{gap:.7rem}}