/* =========================================================
   www 789bet - design.css
   Mobile-first HTML5 casino homepage styles
   Prefix: vb7e-  | Lang: vi  | Max width: 430px
   Palette: #87CEFA #BBBBBB #778899 #48D1CC #1B263B #4169E1
   ========================================================= */

/* ---------- Reset & Base ---------- */
:root{
  --vb7e-bg:#0f1420;
  --vb7e-bg-2:#1B263B;
  --vb7e-bg-3:#16203a;
  --vb7e-primary:#4169E1;
  --vb7e-accent:#48D1CC;
  --vb7e-sky:#87CEFA;
  --vb7e-grey:#778899;
  --vb7e-silver:#BBBBBB;
  --vb7e-text:#eaf2ff;
  --vb7e-text-dim:#9fb0cc;
  --vb7e-gold:#ffcf5c;
  --vb7e-red:#ff5b6e;
  --vb7e-green:#3ddc97;
  --vb7e-radius:14px;
  --vb7e-shadow:0 8px 24px rgba(0,0,0,.35);
  --vb7e-header-h:60px;
  --vb7e-nav-h:62px;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{font-size:62.5%;scroll-behavior:smooth}
body{
  font-family:"Segoe UI","Roboto","Helvetica Neue",Arial,sans-serif;
  background:linear-gradient(180deg,var(--vb7e-bg) 0%,var(--vb7e-bg-2) 100%);
  color:var(--vb7e-text);
  line-height:1.55;
  max-width:430px;
  margin:0 auto;
  min-height:100vh;
  position:relative;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--vb7e-sky);text-decoration:none}
a:hover{color:var(--vb7e-accent)}
h1,h2,h3,h4{font-weight:700;line-height:1.3;color:#fff}
h1{font-size:2.2rem}
h2{font-size:2rem}
h3{font-size:1.7rem}
p{font-size:1.35rem;color:var(--vb7e-text-dim)}
.vb7e-container{width:100%;max-width:430px;padding:0 14px;margin:0 auto}
.vb7e-visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- Header ---------- */
.vb7e-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--vb7e-header-h);
  background:linear-gradient(90deg,var(--vb7e-bg-2) 0%,var(--vb7e-bg-3) 100%);
  border-bottom:1px solid rgba(135,206,250,.18);
  box-shadow:0 2px 12px rgba(0,0,0,.35);
  max-width:430px;margin:0 auto;
}
.vb7e-header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;padding:0 12px}
.vb7e-logo{display:flex;align-items:center;gap:8px;color:#fff;font-weight:800;font-size:1.6rem;letter-spacing:.3px}
.vb7e-logo .vb7e-logo-mark{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--vb7e-primary),var(--vb7e-accent));
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.4rem;font-weight:900;
  box-shadow:0 2px 8px rgba(65,105,225,.55);
}
.vb7e-logo small{display:block;font-size:1rem;color:var(--vb7e-silver);font-weight:500;letter-spacing:.4px}
.vb7e-header-actions{display:flex;align-items:center;gap:8px}
.vb7e-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 16px;border-radius:24px;font-size:1.3rem;font-weight:700;
  cursor:pointer;border:none;transition:transform .15s ease, box-shadow .15s ease, filter .15s ease;
  white-space:nowrap;line-height:1;
}
.vb7e-btn:active{transform:scale(.95)}
.vb7e-btn-login{
  background:transparent;color:var(--vb7e-sky);
  border:1.5px solid rgba(135,206,250,.55);
}
.vb7e-btn-login:hover{background:rgba(135,206,250,.1)}
.vb7e-btn-register{
  background:linear-gradient(135deg,var(--vb7e-gold) 0%,#ff9d3d 100%);
  color:#1B263B;font-weight:800;
  box-shadow:0 4px 12px rgba(255,207,92,.35);
}
.vb7e-btn-register:hover{filter:brightness(1.08)}
.vb7e-btn-primary{
  background:linear-gradient(135deg,var(--vb7e-primary),var(--vb7e-accent));
  color:#fff;box-shadow:0 4px 12px rgba(65,105,225,.45);
}
.vb7e-hamburger{
  display:none;width:40px;height:40px;border:none;background:transparent;color:#fff;font-size:2rem;cursor:pointer;
}

/* ---------- Mobile Menu ---------- */
.vb7e-menu-overlay{
  position:fixed;inset:0;background:rgba(5,8,16,.6);z-index:9998;
  opacity:0;visibility:hidden;transition:.25s;
  max-width:430px;margin:0 auto;
}
.vb7e-menu-overlay.vb7e-open{opacity:1;visibility:visible}
.vb7e-side-menu{
  position:fixed;top:0;right:-86%;width:80%;max-width:340px;height:100%;z-index:9999;
  background:linear-gradient(180deg,var(--vb7e-bg-2),var(--vb7e-bg));
  padding:80px 18px 30px;transition:right .28s ease;overflow-y:auto;
  border-left:1px solid rgba(135,206,250,.18);
}
.vb7e-side-menu.vb7e-open{right:0}
.vb7e-menu-close{position:absolute;top:14px;right:14px;width:38px;height:38px;border:none;background:transparent;color:#fff;font-size:2rem;cursor:pointer}
.vb7e-side-menu h4{font-size:1.3rem;color:var(--vb7e-silver);margin:14px 0 8px;text-transform:uppercase;letter-spacing:1px}
.vb7e-side-menu ul{list-style:none}
.vb7e-side-menu li{margin-bottom:6px}
.vb7e-side-menu a{
  display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:10px;
  color:var(--vb7e-text);font-size:1.4rem;font-weight:600;
  background:rgba(255,255,255,.03);border:1px solid rgba(135,206,250,.08);
}
.vb7e-side-menu a:hover{background:rgba(72,209,204,.14);color:#fff}
.vb7e-side-menu a i{color:var(--vb7e-accent);font-size:1.6rem}

/* ---------- Main ---------- */
.vb7e-main{padding-top:calc(var(--vb7e-header-h) + 8px);padding-bottom:80px}

/* ---------- Hero / Carousel ---------- */
.vb7e-hero{position:relative;margin:8px 0 0;overflow:hidden}
.vb7e-carousel{position:relative;border-radius:0;overflow:hidden}
.vb7e-slides{display:flex;transition:transform .45s ease}
.vb7e-slide{
  min-width:100%;height:200px;position:relative;
  display:flex;align-items:flex-end;padding:18px;
}
.vb7e-slide::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(0deg,rgba(15,20,32,.92) 0%,rgba(15,20,32,.35) 55%,rgba(15,20,32,.15) 100%);
}
.vb7e-slide-content{position:relative;z-index:2}
.vb7e-slide-tag{
  display:inline-block;padding:4px 10px;border-radius:20px;font-size:1.05rem;font-weight:700;
  background:rgba(72,209,204,.18);color:var(--vb7e-accent);border:1px solid rgba(72,209,204,.35);
  margin-bottom:8px;
}
.vb7e-slide h2{font-size:2rem;color:#fff;margin-bottom:6px;text-shadow:0 2px 6px rgba(0,0,0,.5)}
.vb7e-slide p{color:var(--vb7e-silver);font-size:1.25rem;margin-bottom:10px}
.vb7e-slide .vb7e-btn{font-size:1.25rem}
.vb7e-carousel-dots{
  position:absolute;bottom:10px;left:50%;transform:translateX(-50%);
  display:flex;gap:6px;z-index:3;
}
.vb7e-carousel-dots span{
  width:7px;height:7px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;transition:.2s;
}
.vb7e-carousel-dots span.vb7e-active{background:var(--vb7e-accent);width:20px;border-radius:6px}

/* ---------- Quick stats ---------- */
.vb7e-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:14px;margin-top:6px}
.vb7e-stat{
  background:rgba(255,255,255,.04);border:1px solid rgba(135,206,250,.14);border-radius:12px;
  padding:10px 6px;text-align:center;
}
.vb7e-stat .vb7e-stat-num{display:block;font-size:1.7rem;font-weight:800;color:var(--vb7e-gold)}
.vb7e-stat .vb7e-stat-label{font-size:1.05rem;color:var(--vb7e-text-dim);display:block;margin-top:2px}

/* ---------- Section heading ---------- */
.vb7e-section{padding:18px 14px 6px}
.vb7e-section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.vb7e-section-title{
  display:flex;align-items:center;gap:8px;font-size:1.75rem;color:#fff;font-weight:800;
}
.vb7e-section-title i{color:var(--vb7e-accent);font-size:1.9rem}
.vb7e-section-link{font-size:1.15rem;color:var(--vb7e-sky);font-weight:600}

/* ---------- Category filter ---------- */
.vb7e-filter{display:flex;gap:8px;overflow-x:auto;padding:6px 14px 12px;scrollbar-width:none}
.vb7e-filter::-webkit-scrollbar{display:none}
.vb7e-filter button{
  flex:0 0 auto;padding:8px 16px;border-radius:22px;border:1px solid rgba(135,206,250,.25);
  background:rgba(255,255,255,.04);color:var(--vb7e-silver);font-size:1.25rem;font-weight:600;cursor:pointer;
  transition:.18s;
}
.vb7e-filter button.vb7e-active{
  background:linear-gradient(135deg,var(--vb7e-primary),var(--vb7e-accent));
  color:#fff;border-color:transparent;box-shadow:0 3px 10px rgba(65,105,225,.4);
}

/* ---------- Game grid ---------- */
.vb7e-game-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:0 14px}
.vb7e-card{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid rgba(135,206,250,.12);border-radius:var(--vb7e-radius);
  overflow:hidden;position:relative;cursor:pointer;transition:transform .18s ease, box-shadow .18s ease;
}
.vb7e-card:hover{transform:translateY(-3px);box-shadow:var(--vb7e-shadow);border-color:rgba(72,209,204,.5)}
.vb7e-card .vb7e-card-img{position:relative;height:96px;background:radial-gradient(circle at 50% 30%,#1f3052,#0f1420)}
.vb7e-card .vb7e-card-img img{width:100%;height:100%;object-fit:cover}
.vb7e-card .vb7e-card-badge{
  position:absolute;top:6px;left:6px;padding:2px 7px;border-radius:8px;font-size:.95rem;font-weight:700;
  background:linear-gradient(135deg,var(--vb7e-red),#ff8a3d);color:#fff;
}
.vb7e-card .vb7e-card-badge.vb7e-hot{background:linear-gradient(135deg,var(--vb7e-gold),#ff6b3d);color:#1B263B}
.vb7e-card .vb7e-card-play{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:.2s;
  background:rgba(15,20,32,.6);
}
.vb7e-card:hover .vb7e-card-play{opacity:1}
.vb7e-card .vb7e-card-play span{
  width:38px;height:38px;border-radius:50%;background:var(--vb7e-accent);color:#1B263B;
  display:flex;align-items:center;justify-content:center;font-size:1.4rem;
}
.vb7e-card-body{padding:8px 8px 10px}
.vb7e-card-body h4{font-size:1.2rem;color:#fff;font-weight:600;line-height:1.3;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.vb7e-card-body .vb7e-card-type{font-size:1rem;color:var(--vb7e-accent);font-weight:600;margin-top:3px}

/* Featured 2-col */
.vb7e-featured-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;padding:0 14px}
.vb7e-featured-grid .vb7e-card .vb7e-card-img{height:130px}
.vb7e-featured-grid .vb7e-card-body h4{font-size:1.4rem}

/* ---------- Promo banner ---------- */
.vb7e-promo-banner{
  margin:14px;border-radius:16px;padding:18px;color:#fff;position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--vb7e-primary) 0%,#7b4dff 60%,var(--vb7e-accent) 100%);
  box-shadow:0 8px 22px rgba(65,105,225,.35);
}
.vb7e-promo-banner::after{content:"🎁";position:absolute;right:-10px;bottom:-18px;font-size:6rem;opacity:.18}
.vb7e-promo-banner h3{font-size:1.9rem;color:#fff;margin-bottom:6px}
.vb7e-promo-banner p{color:rgba(255,255,255,.92);font-size:1.25rem;margin-bottom:10px}
.vb7e-promo-banner .vb7e-btn{background:#fff;color:var(--vb7e-primary);font-weight:800}

/* ---------- SEO long content ---------- */
.vb7e-seo{padding:18px 14px}
.vb7e-seo h2{font-size:1.9rem;margin:14px 0 8px;color:#fff;border-left:4px solid var(--vb7e-accent);padding-left:10px}
.vb7e-seo h3{font-size:1.55rem;margin:12px 0 6px;color:var(--vb7e-sky)}
.vb7e-seo p{font-size:1.32rem;color:var(--vb7e-text-dim);margin-bottom:8px}
.vb7e-seo ul{padding-left:20px;margin:6px 0 10px}
.vb7e-seo li{font-size:1.3rem;color:var(--vb7e-text-dim);margin-bottom:4px}
.vb7e-seo a{color:var(--vb7e-sky);font-weight:600;text-decoration:underline;text-underline-offset:2px}

/* ---------- Steps ---------- */
.vb7e-steps{display:grid;gap:10px;padding:0 14px}
.vb7e-step{
  display:flex;gap:12px;padding:12px;border-radius:12px;
  background:rgba(255,255,255,.04);border:1px solid rgba(135,206,250,.14);
}
.vb7e-step-num{
  flex:0 0 36px;width:36px;height:36px;border-radius:50%;
  background:linear-gradient(135deg,var(--vb7e-primary),var(--vb7e-accent));color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;font-size:1.5rem;
}
.vb7e-step h4{font-size:1.4rem;color:#fff;margin-bottom:3px}
.vb7e-step p{font-size:1.2rem;color:var(--vb7e-text-dim)}

/* ---------- FAQ ---------- */
.vb7e-faq{padding:0 14px;margin-top:6px}
.vb7e-faq-item{
  border:1px solid rgba(135,206,250,.14);border-radius:10px;margin-bottom:8px;overflow:hidden;background:rgba(255,255,255,.03);
}
.vb7e-faq-q{
  width:100%;text-align:left;background:transparent;border:none;color:#fff;font-size:1.35rem;font-weight:700;
  padding:12px 14px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:10px;
}
.vb7e-faq-q .vb7e-faq-icon{color:var(--vb7e-accent);transition:transform .2s;font-size:1.4rem}
.vb7e-faq-item.vb7e-open .vb7e-faq-icon{transform:rotate(45deg)}
.vb7e-faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 14px}
.vb7e-faq-item.vb7e-open .vb7e-faq-a{max-height:280px;padding:0 14px 12px}
.vb7e-faq-a p{font-size:1.25rem;color:var(--vb7e-text-dim)}

/* ---------- Footer ---------- */
.vb7e-footer{
  background:var(--vb7e-bg-3);border-top:1px solid rgba(135,206,250,.14);
  padding:22px 14px 30px;margin-top:18px;
}
.vb7e-footer-cols{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
.vb7e-footer h5{color:#fff;font-size:1.35rem;margin-bottom:8px;font-weight:700}
.vb7e-footer ul{list-style:none}
.vb7e-footer li{margin-bottom:5px}
.vb7e-footer a{color:var(--vb7e-silver);font-size:1.2rem}
.vb7e-footer a:hover{color:var(--vb7e-accent)}
.vb7e-footer-brand{font-size:1.25rem;color:var(--vb7e-text-dim);margin-bottom:10px}
.vb7e-footer-pay{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.vb7e-footer-pay span{
  padding:5px 10px;border-radius:8px;background:rgba(255,255,255,.06);
  font-size:1.1rem;color:var(--vb7e-silver);border:1px solid rgba(135,206,250,.14);
}
.vb7e-footer-bottom{
  text-align:center;border-top:1px solid rgba(135,206,250,.1);padding-top:14px;margin-top:10px;
  font-size:1.15rem;color:var(--vb7e-grey);
}
.vb7e-cta-band{
  margin:14px;padding:18px;border-radius:16px;text-align:center;
  background:linear-gradient(135deg,#0f1420 0%,var(--vb7e-bg-2) 100%);
  border:1.5px dashed rgba(72,209,204,.5);
}
.vb7e-cta-band h3{font-size:1.8rem;color:#fff;margin-bottom:6px}
.vb7e-cta-band p{font-size:1.25rem;margin-bottom:12px}

/* ---------- Mobile bottom nav ---------- */
.vb7e-bottom-nav{
  position:fixed;bottom:0;left:0;right:0;z-index:1000;
  height:var(--vb7e-nav-h);
  background:linear-gradient(180deg,var(--vb7e-bg-3) 0%,#0a0f1c 100%);
  border-top:1px solid rgba(72,209,204,.3);
  display:flex;justify-content:space-around;align-items:stretch;
  max-width:430px;margin:0 auto;box-shadow:0 -4px 18px rgba(0,0,0,.4);
}
.vb7e-bottom-nav a, .vb7e-bottom-nav button{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  background:transparent;border:none;color:var(--vb7e-silver);font-size:1rem;font-weight:600;
  cursor:pointer;text-decoration:none;padding:6px 2px;position:relative;transition:color .15s;
}
.vb7e-bottom-nav a i, .vb7e-bottom-nav button i{font-size:2rem}
.vb7e-bottom-nav a.vb7e-nav-promo, .vb7e-bottom-nav button.vb7e-nav-promo{color:var(--vb7e-gold)}
.vb7e-bottom-nav a:hover, .vb7e-bottom-nav button:hover{color:#fff}
.vb7e-bottom-nav .vb7e-active{color:var(--vb7e-accent)}
.vb7e-bottom-nav .vb7e-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:3px;border-radius:0 0 4px 4px;background:var(--vb7e-accent);
}
.vb7e-nav-fab{
  position:absolute;top:-22px;left:50%;transform:translateX(-50%);
  width:48px;height:48px;border-radius:50%;border:3px solid #0a0f1c;
  background:linear-gradient(135deg,var(--vb7e-gold),#ff6b3d);color:#1B263B;
  display:flex;align-items:center;justify-content:center;font-size:2.2rem;cursor:pointer;
  box-shadow:0 4px 12px rgba(255,107,61,.5);
}

/* ---------- Desktop ---------- */
@media (min-width:769px){
  .vb7e-bottom-nav{display:none}
  .vb7e-hamburger{display:none}
}
@media (max-width:768px){
  .vb7e-hamburger{display:flex;align-items:center;justify-content:center}
  .vb7e-main{padding-bottom:calc(var(--vb7e-nav-h) + 14px)}
}