:root{
  --bg:#0d0d0d; --card:#151515; --gold:#f0d36d; --gold-2:#ffdd7a;
  --text:#e6e0c2; --line:rgba(240,211,109,.22);
  --shadow:0 20px 40px rgba(240,211,109,.08);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:linear-gradient(180deg,#0d0d0d,#0a0a0a);
  color:var(--gold); font-family:Arial,Helvetica,sans-serif;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}

/* Layout */
.container{max-width:980px;margin:0 auto;padding:16px}
.card{
  background:linear-gradient(180deg,var(--card),#0f0f0f);
  border:1px solid var(--line); border-radius:16px; box-shadow:var(--shadow);
  padding:16px;
}
h1{font-size:clamp(24px,5vw,32px);margin:12px 0}
h2{font-size:clamp(20px,4.2vw,26px);margin:10px 0}
hr.gold{border:0;height:1px;background:var(--line);margin:16px 0}
.small{opacity:.85;font-size:.9rem}
.center{text-align:center}
.mt-20{margin-top:20px} .mb-20{margin-bottom:20px}

/* Buttons */
.btn{
  display:inline-block;background:var(--gold);color:#111;padding:10px 16px;
  border-radius:10px;font-weight:700;border:0;cursor:pointer;
  transition:transform .08s, background .15s;
}
.btn:hover{background:var(--gold-2)}
.btn:active{transform:translateY(1px)}
.btn-outline{background:transparent;color:var(--gold);border:1px solid var(--line)}
.btn-row{display:flex;gap:10px;flex-wrap:wrap}
.focus-visible:focus-visible,.btn:focus-visible,a:focus-visible{outline:2px solid var(--gold-2);outline-offset:2px}

/* NAVBAR */
.nav{
  position:sticky;top:0;z-index:1000;background:rgba(13,13,13,.84);
  backdrop-filter:saturate(140%) blur(6px); border-bottom:1px solid var(--line);
}
.nav .inner{display:flex;align-items:center;justify-content:space-between;padding:10px 16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand .logo{width:28px;height:28px;background:url('/images/rollercoin_logo.png') center/contain no-repeat;filter:drop-shadow(0 1px 3px rgba(0,0,0,.6))}
.nav-links{display:flex;gap:14px}
.nav-links a{padding:6px 10px;border-radius:8px}
.nav-links a.active,.nav-links a:hover{background:rgba(240,211,109,.08)}
.menu-btn{display:none;background:transparent;border:1px solid var(--line);border-radius:8px;color:var(--gold);padding:6px 8px}

@media (max-width:860px){
  .nav-links{
    display:none;position:absolute;left:0;right:0;top:56px;background:rgba(13,13,13,.98);
    border-bottom:1px solid var(--line); padding:10px 16px; flex-direction:column; gap:8px;
  }
  .nav.open .nav-links{display:flex}
  .menu-btn{display:inline-block}
}

/* Footer */
.footer{margin-top:32px;border-top:1px solid var(--line);padding:16px;text-align:center;color:var(--text)}
.footer a{color:var(--gold)}