/* =========================================================
   topgamebaidoithuong.click - Core stylesheet
   Prefix: gf6b-
   Palette: #00695C / #273746 / #AFEEEE / #FFCCCB / #A9A9A9 / #8B008B
   Mobile-first. All custom classes use the gf6b- prefix.
   ========================================================= */

:root{
  --gf6b-bg:#0d1b22;
  --gf6b-bg-2:#102a32;
  --gf6b-deep:#273746;
  --gf6b-teal:#00695C;
  --gf6b-teal-2:#00897B;
  --gf6b-magenta:#8B008B;
  --gf6b-magenta-2:#b81db8;
  --gf6b-pale:#AFEEEE;
  --gf6b-pink:#FFCCCB;
  --gf6b-gray:#A9A9A9;
  --gf6b-text:#eaf6f6;
  --gf6b-muted:#9fb3bb;
  --gf6b-line:rgba(175,238,238,.14);
  --gf6b-gold:#ffd479;
  --gf6b-shadow:0 10px 26px rgba(0,0,0,.45);
  --gf6b-radius:16px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Segoe UI","Roboto","Helvetica Neue",Arial,sans-serif;
  background:radial-gradient(1200px 600px at 20% -10%,rgba(139,0,139,.25),transparent 60%),
             radial-gradient(900px 500px at 110% 10%,rgba(0,105,92,.35),transparent 55%),
             linear-gradient(180deg,#0a151b 0%,#0d1b22 50%,#0a141a 100%);
  color:var(--gf6b-text);
  line-height:1.6;
  -webkit-text-size-adjust:100%;
  overflow-x:hidden;
}
a{color:var(--gf6b-pale);text-decoration:none}
a:hover{color:#fff}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.3;font-weight:800}
p{margin:0 0 1em}
.gf6b-container{width:100%;max-width:1200px;margin:0 auto;padding:0 14px}

/* ---------- Header ---------- */
.gf6b-header{
  position:sticky;top:0;z-index:1000;
  background:linear-gradient(90deg,#0a141a 0%,#14323a 55%,#1d0f24 100%);
  border-bottom:1px solid var(--gf6b-line);
  box-shadow:0 6px 18px rgba(0,0,0,.35);
}
.gf6b-header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:62px;gap:10px;
}
.gf6b-logo{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:.3px}
.gf6b-logo-mark{
  width:38px;height:38px;border-radius:11px;
  background:conic-gradient(from 140deg,var(--gf6b-magenta),var(--gf6b-teal),var(--gf6b-magenta));
  display:grid;place-items:center;color:#fff;font-size:18px;
  box-shadow:0 0 16px rgba(139,0,139,.5);
}
.gf6b-logo-text{font-size:18px;background:linear-gradient(90deg,var(--gf6b-pale),#fff 60%,var(--gf6b-pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.gf6b-logo-text small{display:block;font-size:10px;color:var(--gf6b-muted);font-weight:600;letter-spacing:2px}
.gf6b-nav{display:none;gap:18px;font-size:14px}
.gf6b-nav a{color:var(--gf6b-muted);font-weight:600;transition:color .2s}
.gf6b-nav a:hover{color:var(--gf6b-pale)}
.gf6b-head-actions{display:flex;align-items:center;gap:8px}
.gf6b-btn{
  border:0;cursor:pointer;border-radius:999px;font-weight:800;
  padding:10px 18px;font-size:13px;letter-spacing:.3px;
  transition:transform .15s, box-shadow .2s, filter .2s;
}
.gf6b-btn:active{transform:scale(.96)}
.gf6b-btn-login{background:transparent;color:var(--gf6b-pale);border:1px solid var(--gf6b-pale)}
.gf6b-btn-login:hover{background:rgba(175,238,238,.12)}
.gf6b-btn-register{
  background:linear-gradient(90deg,var(--gf6b-magenta),var(--gf6b-magenta-2));
  color:#fff;box-shadow:0 6px 18px rgba(139,0,139,.45);
}
.gf6b-btn-register:hover{filter:brightness(1.08)}
.gf6b-icon-btn{
  background:transparent;border:1px solid var(--gf6b-line);color:var(--gf6b-pale);
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-size:18px;cursor:pointer;
}

/* ---------- Mobile menu ---------- */
.gf6b-menu-backdrop{
  position:fixed;inset:0;background:rgba(3,8,12,.65);z-index:9999;
  opacity:0;pointer-events:none;transition:opacity .25s;
}
.gf6b-menu-backdrop.gf6b-open{opacity:1;pointer-events:auto}
.gf6b-side-menu{
  position:fixed;top:0;right:-86%;width:80%;max-width:320px;height:100%;
  background:linear-gradient(180deg,#10212a,#0c1419);z-index:10000;
  transition:right .3s ease;padding:18px 16px;overflow-y:auto;border-left:1px solid var(--gf6b-line);
}
.gf6b-side-menu.gf6b-open{right:0}
.gf6b-menu-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.gf6b-menu-head h3{font-size:16px;color:#fff}
.gf6b-menu-close{background:transparent;border:0;color:#fff;font-size:22px;cursor:pointer}
.gf6b-menu-actions{display:flex;gap:10px;margin-bottom:18px}
.gf6b-menu-actions .gf6b-btn{flex:1;text-align:center}
.gf6b-menu-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px}
.gf6b-menu-list a{
  display:flex;align-items:center;gap:12px;padding:13px 12px;border-radius:12px;
  color:var(--gf6b-text);font-weight:700;border:1px solid transparent;
}
.gf6b-menu-list a:hover{background:rgba(175,238,238,.08);border-color:var(--gf6b-line)}
.gf6b-menu-list .material-icons,.gf6b-menu-list i{font-size:22px;color:var(--gf6b-pale)}

/* ---------- Hero ---------- */
.gf6b-hero{
  position:relative;margin-top:14px;border-radius:22px;overflow:hidden;
  box-shadow:var(--gf6b-shadow);border:1px solid var(--gf6b-line);
}
.gf6b-hero-slides{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none}
.gf6b-hero-slides::-webkit-scrollbar{display:none}
.gf6b-hero-slide{
  flex:0 0 100%;scroll-snap-align:start;position:relative;min-height:340px;
  display:flex;align-items:flex-end;
}
.gf6b-hero-slide img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.gf6b-hero-overlay{
  position:relative;z-index:2;padding:22px 18px;
  background:linear-gradient(180deg,transparent 20%,rgba(5,12,16,.85) 100%);
  width:100%;
}
.gf6b-tag{
  display:inline-block;font-size:11px;letter-spacing:1px;font-weight:800;
  background:rgba(139,0,139,.25);color:var(--gf6b-pink);
  padding:5px 11px;border-radius:999px;border:1px solid rgba(255,204,203,.4);
  margin-bottom:10px;
}
.gf6b-hero-overlay h2{font-size:24px;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.6)}
.gf6b-hero-overlay p{color:var(--gf6b-pale);font-size:14px;margin-bottom:14px}
.gf6b-hero-dots{display:flex;gap:6px;justify-content:center;padding:8px 0}
.gf6b-hero-dots span{
  width:8px;height:8px;border-radius:999px;background:rgba(175,238,238,.3);cursor:pointer;
}
.gf6b-hero-dots span.gf6b-active{background:var(--gf6b-magenta);width:22px;transition:all .25s}

/* ---------- Section ---------- */
.gf6b-section{margin:28px 0}
.gf6b-section-head{
  display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;gap:12px;
}
.gf6b-section-title{
  font-size:20px;color:#fff;display:flex;align-items:center;gap:10px;
}
.gf6b-section-title .material-icons{color:var(--gf6b-pink);font-size:24px}
.gf6b-section-more{font-size:13px;color:var(--gf6b-pale);font-weight:700}
.gf6b-section-more:hover{color:#fff}

/* ---------- Category chips ---------- */
.gf6b-chips{display:flex;gap:8px;overflow-x:auto;padding-bottom:8px;scrollbar-width:none}
.gf6b-chips::-webkit-scrollbar{display:none}
.gf6b-chip{
  flex:0 0 auto;border:1px solid var(--gf6b-line);background:rgba(175,238,238,.06);
  color:var(--gf6b-pale);padding:9px 16px;border-radius:999px;font-weight:700;font-size:13px;
  cursor:pointer;white-space:nowrap;transition:all .2s;
}
.gf6b-chip.gf6b-active,.gf6b-chip:hover{
  background:linear-gradient(90deg,var(--gf6b-teal),var(--gf6b-magenta));
  border-color:transparent;color:#fff;
}

/* ---------- Game grid & cards ---------- */
.gf6b-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.gf6b-card{
  position:relative;border-radius:14px;overflow:hidden;background:#13242c;
  border:1px solid var(--gf6b-line);aspect-ratio:3/4;display:flex;flex-direction:column;
  transition:transform .2s, box-shadow .2s;
}
.gf6b-card:hover{transform:translateY(-4px);box-shadow:0 12px 22px rgba(139,0,139,.25)}
.gf6b-card .gf6b-card-img{flex:1;position:relative;overflow:hidden}
.gf6b-card .gf6b-card-img img{width:100%;height:100%;object-fit:cover}
.gf6b-card-ribbon{
  position:absolute;top:8px;left:8px;font-size:10px;font-weight:800;letter-spacing:.5px;
  background:linear-gradient(90deg,var(--gf6b-magenta),#d4408f);color:#fff;
  padding:3px 9px;border-radius:999px;
}
.gf6b-card-play{
  position:absolute;inset:0;background:rgba(5,12,16,.55);display:flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity .2s;font-size:30px;color:#fff;
}
.gf6b-card:hover .gf6b-card-play{opacity:1}
.gf6b-card-body{
  padding:8px 9px;background:linear-gradient(180deg,rgba(0,0,0,.2),rgba(0,0,0,.55));
}
.gf6b-card-title{font-size:12px;font-weight:700;color:#fff;line-height:1.25;height:30px;overflow:hidden}
.gf6b-card-meta{font-size:10px;color:var(--gf6b-muted);margin-top:2px}

/* ---------- Feature blocks ---------- */
.gf6b-features{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.gf6b-feature{
  background:linear-gradient(180deg,rgba(0,105,92,.18),rgba(139,0,139,.12));
  border:1px solid var(--gf6b-line);border-radius:16px;padding:16px;
}
.gf6b-feature .material-icons,.gf6b-feature i{font-size:30px;color:var(--gf6b-pink);margin-bottom:8px}
.gf6b-feature h4{color:#fff;font-size:15px}
.gf6b-feature p{color:var(--gf6b-muted);font-size:12px;margin:0}

/* ---------- Promo CTA banner ---------- */
.gf6b-cta{
  margin:24px 0;border-radius:20px;padding:22px 18px;text-align:center;color:#fff;
  background:
    radial-gradient(400px 200px at 80% 0%,rgba(255,204,203,.25),transparent 60%),
    linear-gradient(120deg,var(--gf6b-magenta) 0%,#3b1136 60%,var(--gf6b-teal) 130%);
  border:1px solid rgba(255,212,121,.4);
  box-shadow:0 10px 28px rgba(139,0,139,.35);
}
.gf6b-cta h3{font-size:20px;color:#fff}
.gf6b-cta p{color:var(--gf6b-pale);font-size:13px;margin-bottom:14px}
.gf6b-cta .gf6b-btn{background:#fff;color:var(--gf6b-magenta)}
.gf6b-cta .gf6b-btn:hover{background:var(--gf6b-pink)}

/* ---------- SEO long text ---------- */
.gf6b-prose{
  background:rgba(13,27,34,.6);border:1px solid var(--gf6b-line);border-radius:18px;padding:18px;
  color:var(--gf6b-text);font-size:14px;
}
.gf6b-prose h2{color:#fff;font-size:19px;margin-top:14px}
.gf6b-prose h2:first-child{margin-top:0}
.gf6b-prose h3{color:var(--gf6b-pale);font-size:15px;margin-top:14px}
.gf6b-prose ul{margin:0 0 1em;padding-left:20px}
.gf6b-prose li{margin-bottom:6px}
.gf6b-prose a{color:var(--gf6b-pink);font-weight:700;text-decoration:underline}

/* ---------- Steps ---------- */
.gf6b-steps{display:grid;grid-template-columns:1fr;gap:10px}
.gf6b-step{
  display:flex;gap:12px;background:rgba(0,105,92,.12);border:1px solid var(--gf6b-line);
  padding:14px;border-radius:14px;align-items:flex-start;
}
.gf6b-step-num{
  flex:0 0 32px;width:32px;height:32px;border-radius:50%;
  background:linear-gradient(135deg,var(--gf6b-magenta),var(--gf6b-teal));
  color:#fff;display:grid;place-items:center;font-weight:800;
}
.gf6b-step h4{color:#fff;font-size:14px;margin:0 0 4px}
.gf6b-step p{color:var(--gf6b-muted);font-size:12px;margin:0}

/* ---------- FAQ ---------- */
.gf6b-faq-item{
  border:1px solid var(--gf6b-line);border-radius:12px;margin-bottom:10px;overflow:hidden;
  background:rgba(175,238,238,.04);
}
.gf6b-faq-q{
  width:100%;text-align:left;background:transparent;border:0;color:#fff;
  padding:14px 16px;font-size:14px;font-weight:700;cursor:pointer;display:flex;justify-content:space-between;gap:10px;
}
.gf6b-faq-q .material-icons{transition:transform .2s;color:var(--gf6b-pink)}
.gf6b-faq-item.gf6b-open .gf6b-faq-q .material-icons{transform:rotate(180deg)}
.gf6b-faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 16px;color:var(--gf6b-muted);font-size:13px}
.gf6b-faq-item.gf6b-open .gf6b-faq-a{max-height:400px;padding:0 16px 14px}

/* ---------- Featured winners / ticker ---------- */
.gf6b-ticker{
  background:#0a141a;border:1px solid var(--gf6b-line);border-radius:12px;
  padding:10px 12px;display:flex;align-items:center;gap:10px;overflow:hidden;
}
.gf6b-ticker-label{
  flex:0 0 auto;font-size:11px;font-weight:800;color:#fff;background:var(--gf6b-magenta);
  padding:4px 9px;border-radius:999px;letter-spacing:.5px;
}
.gf6b-ticker-track{flex:1;overflow:hidden;white-space:nowrap;position:relative;height:20px}
.gf6b-ticker-track span{position:absolute;left:100%;top:0;font-size:12px;color:var(--gf6b-pale);animation:gf6b-scroll 22s linear infinite}
@keyframes gf6b-scroll{from{transform:translateX(0)}to{transform:translateX(-100%)}}

/* ---------- Footer ---------- */
.gf6b-footer{
  margin-top:30px;border-top:1px solid var(--gf6b-line);
  background:linear-gradient(180deg,#0c1419,#070c10);padding:24px 0 16px;color:var(--gf6b-muted);
}
.gf6b-footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.gf6b-footer h4{color:#fff;font-size:14px;margin-bottom:8px}
.gf6b-footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px;font-size:12px}
.gf6b-footer a{color:var(--gf6b-muted)}
.gf6b-footer a:hover{color:var(--gf6b-pale)}
.gf6b-footer-bottom{
  border-top:1px solid var(--gf6b-line);margin-top:18px;padding-top:14px;
  font-size:11px;text-align:center;color:#7a8d94;
}
.gf6b-disclaimer{
  margin-top:14px;font-size:11px;color:#7a8d94;line-height:1.6;
  background:rgba(0,0,0,.25);border-radius:10px;padding:10px 12px;
}

/* ---------- Bottom nav (mobile only) ---------- */
.gf6b-bottom-nav{
  position:fixed;left:0;right:0;bottom:0;z-index:1000;
  display:flex;justify-content:space-around;align-items:stretch;
  height:62px;
  background:linear-gradient(90deg,#0a141a,#14323a 50%,#1d0f24);
  border-top:1px solid rgba(175,238,238,.18);
  box-shadow:0 -6px 18px rgba(0,0,0,.5);
}
.gf6b-bottom-nav a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--gf6b-muted);font-size:10px;font-weight:700;gap:2px;text-decoration:none;
  position:relative;transition:color .2s;
}
.gf6b-bottom-nav a.gf6b-bn-promo{color:var(--gf6b-pink)}
.gf6b-bottom-nav a.active{color:#fff}
.gf6b-bottom-nav a.active::before{
  content:"";position:absolute;top:0;width:26px;height:3px;border-radius:0 0 6px 6px;
  background:linear-gradient(90deg,var(--gf6b-magenta),var(--gf6b-pale));
}
.gf6b-bottom-nav .material-icons,.gf6b-bottom-nav i{font-size:22px}
.gf6b-bottom-nav .ion{font-size:22px}

/* ---------- Desktop breakpoints ---------- */
@media (min-width:768px){
  .gf6b-nav{display:flex}
  .gf6b-icon-btn.gf6b-burger{display:none}
  .gf6b-grid{grid-template-columns:repeat(5,1fr)}
  .gf6b-features{grid-template-columns:repeat(4,1fr)}
  .gf6b-steps{grid-template-columns:repeat(4,1fr)}
  .gf6b-footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}
  .gf6b-bottom-nav{display:none}
  .gf6b-hero-slide{min-height:420px}
  .gf6b-hero-overlay h2{font-size:34px}
  main{padding-bottom:20px !important}
}

/* main always gets bottom clearance on mobile for bottom nav */
main{padding-bottom:84px}

/* === Mobile fine-tune: small phones <= 430px === */
@media (max-width: 430px) {
  html { font-size: 14px; -webkit-text-size-adjust: 100%; }
  body { font-size: 14px; line-height: 1.5; overflow-x: hidden; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.05rem; }
  img { max-width: 100%; height: auto; }
  .gf6bhero-title { font-size: 1.6rem !important; }
  .gf6bgame-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 8px !important; }
  .gf6bcard { padding: 6px !important; }
  .gf6bsection { padding: 12px 10px !important; }
  .gf6bbottom-nav { height: 56px !important; }
  .gf6bbottom-nav a { font-size: 10px !important; }
}