/* ============================================
   Design System: Emerald Trust Gaming UI
   bd-ok.top | Original Design System
   ============================================ */
:root {
  --color-primary: #0d9488;
  --color-primary-dark: #0f766e;
  --color-primary-soft: rgba(13,148,136,.12);
  --color-secondary: #6366f1;
  --color-accent: #f59e0b;
  --color-bg: #0a0f1a;
  --color-bg-soft: #0f172a;
  --color-surface: #1e293b;
  --color-surface-strong: #253349;
  --color-card: linear-gradient(145deg,#1a2537,#162032);
  --color-card-alt: linear-gradient(145deg,#1e2d42,#192740);
  --color-border: rgba(13,148,136,.25);
  --color-border-strong: rgba(13,148,136,.45);
  --color-text: #e2e8f0;
  --color-text-soft: #94a3b8;
  --color-text-muted: #64748b;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-footer-bg: #050a14;
  --color-footer-text: #94a3b8;
  --gradient-hero: linear-gradient(135deg,#0a0f1a 0%,#0f2027 50%,#0a0f1a 100%);
  --gradient-button: linear-gradient(135deg,#0d9488,#0ea5e9);
  --gradient-button-hover: linear-gradient(135deg,#0f766e,#0284c7);
  --gradient-cta: linear-gradient(135deg,rgba(13,148,136,.15),rgba(99,102,241,.1));
  --shadow-header: 0 2px 20px rgba(0,0,0,.3),0 0 1px rgba(13,148,136,.2);
  --shadow-card: 0 4px 24px rgba(0,0,0,.2),0 0 1px rgba(13,148,136,.15);
  --shadow-card-hover: 0 8px 32px rgba(0,0,0,.3),0 0 2px rgba(13,148,136,.3);
  --shadow-button: 0 2px 12px rgba(13,148,136,.25);
  --shadow-soft: 0 2px 8px rgba(0,0,0,.15);
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 999px;
  --radius-card: 14px;
  --font-base: system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,"Noto Sans Bengali",sans-serif;
  --fs-h1: clamp(1.8rem,4vw,2.8rem);
  --fs-h2: clamp(1.4rem,3vw,2rem);
  --fs-h3: clamp(1.15rem,2vw,1.5rem);
  --fs-body: clamp(15px,.95vw,17px);
  --fs-small: 14px;
  --fs-nav: clamp(13px,.84vw,15px);
  --lh-heading: 1.25;
  --lh-body: 1.85;
  --container-max: 1200px;
  --section-y: clamp(48px,6vw,80px);
  --gap-md: 24px;
  --header-h: 72px;
  --motion-normal: .3s;
  --ease-out: cubic-bezier(.25,.46,.45,.94);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-base);
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  color:var(--color-text);
  background:var(--color-bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--color-primary);text-decoration:none;transition:color var(--motion-normal);}
a:hover{color:#5eead4;}
h1,h2,h3,h4,h5,h6{font-weight:800;line-height:var(--lh-heading);color:var(--color-text);}
h1{font-size:var(--fs-h1);}
h2{font-size:var(--fs-h2);}
h3{font-size:var(--fs-h3);}
p{margin-bottom:1rem;}
ul,ol{padding-left:1.2em;margin-bottom:1rem;}
.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 clamp(16px,3vw,24px);}

/* ---- Header ---- */
.site-header{
  position:sticky;top:0;z-index:1000;width:100%;
  background:rgba(10,15,26,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--color-border);
  box-shadow:var(--shadow-header);
}
.header-inner{
  width:100%;max-width:none;
  padding-left:clamp(10px,1.2vw,20px);
  padding-right:clamp(10px,1.2vw,20px);
  min-height:var(--header-h);
  display:flex;align-items:center;
  gap:clamp(10px,1vw,18px);
}
.brand-wrap{flex:0 0 auto;margin-right:clamp(4px,.8vw,14px);}
.site-logo{
  display:block;width:auto;
  height:clamp(32px,3vw,42px);
  max-width:clamp(118px,10vw,168px);
  object-fit:contain;
}
.primary-nav{
  flex:1 1 auto;min-width:0;
  display:flex;align-items:center;justify-content:center;
  flex-wrap:nowrap;gap:clamp(6px,.72vw,14px);
  white-space:nowrap;overflow:visible;
}
.primary-nav a{
  flex:0 1 auto;min-width:0;
  padding:9px clamp(6px,.65vw,12px);
  font-size:var(--fs-nav);line-height:1;
  white-space:nowrap;color:var(--color-text-soft);
  font-weight:600;border-radius:var(--radius-xs);
  transition:all var(--motion-normal) var(--ease-out);
  border-bottom:2px solid transparent;
}
.primary-nav a:hover,.primary-nav a.active{
  color:#5eead4;border-color:var(--color-primary);
  background:rgba(13,148,136,.06);
}
.header-actions{
  flex:0 0 auto;margin-left:auto;
  display:flex;align-items:center;justify-content:flex-end;
  gap:clamp(6px,.6vw,10px);white-space:nowrap;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 20px;border-radius:var(--radius-pill);
  font-weight:700;font-size:var(--fs-small);
  cursor:pointer;border:none;text-decoration:none;
  transition:all var(--motion-normal) var(--ease-out);
  min-height:42px;white-space:nowrap;
}
.btn-register{
  background:var(--gradient-button);color:#fff;
  box-shadow:var(--shadow-button);
}
.btn-register:hover{background:var(--gradient-button-hover);transform:translateY(-1px);color:#fff;}
.btn-login{
  color:var(--color-primary);border:1.5px solid var(--color-primary);
  background:transparent;
}
.btn-login:hover{background:rgba(13,148,136,.1);color:#5eead4;}
.nav-toggle{
  display:none;flex:0 0 40px;width:40px;height:40px;
  align-items:center;justify-content:center;
  background:transparent;border:1.5px solid var(--color-border);
  border-radius:var(--radius-sm);color:var(--color-text);
  cursor:pointer;font-size:1.3rem;
  margin-left:2px;
}

/* ---- Mobile Header ---- */
@media(max-width:1180px){
  .header-inner{padding-left:clamp(8px,2.4vw,14px);padding-right:clamp(8px,2.4vw,14px);gap:clamp(6px,1.8vw,10px);}
  .brand-wrap{flex:0 1 auto;margin-right:0;}
  .site-logo{height:clamp(30px,8vw,40px);max-width:clamp(104px,27vw,138px);}
  .primary-nav{display:none;}
  .header-actions{margin-left:auto;gap:clamp(5px,1.6vw,8px);}
  .header-actions .btn{min-height:40px;padding-inline:clamp(10px,2.6vw,14px);font-size:clamp(12px,3.2vw,14px);}
  .nav-toggle{display:inline-flex;}
}
@media(max-width:375px){
  .header-inner{padding-left:8px;padding-right:8px;gap:6px;}
  .site-logo{max-width:104px;}
  .header-actions .btn{min-height:38px;padding-inline:9px;font-size:12px;}
  .nav-toggle{flex-basis:38px;width:38px;height:38px;}
}

/* ---- Mobile Menu ---- */
#mobile-menu{
  display:none;position:fixed;
  left:12px;right:12px;top:calc(var(--header-h) + 8px);
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  box-shadow:0 12px 40px rgba(0,0,0,.4);
  padding:16px;z-index:999;
  max-height:calc(100vh - var(--header-h) - 24px);
  overflow-y:auto;flex-direction:column;gap:4px;
}
#mobile-menu.is-open{display:flex;}
#mobile-menu a{
  display:block;padding:14px 16px;color:var(--color-text);
  font-weight:600;border-radius:var(--radius-sm);
  transition:background var(--motion-normal);
}
#mobile-menu a:hover,#mobile-menu a.active{background:rgba(13,148,136,.1);color:#5eead4;}

/* ---- Sections ---- */
.section{padding:var(--section-y) 0;}
.section-alt{background:var(--color-bg-soft);}
.section-accent{background:var(--gradient-cta);}

/* ---- Hero Variants ---- */
.home-hero{
  padding:clamp(80px,10vw,120px) 0 clamp(48px,6vw,80px);
  background:var(--gradient-hero);
  position:relative;overflow:hidden;
}
.home-hero::before{
  content:'';position:absolute;top:-50%;left:-25%;
  width:150%;height:200%;
  background:radial-gradient(circle at 30% 20%,rgba(13,148,136,.08),transparent 40%),
             radial-gradient(circle at 70% 80%,rgba(99,102,241,.06),transparent 35%);
  pointer-events:none;
}
.hero-content{position:relative;z-index:1;}
.hero-badge{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.5rem 1rem;border-radius:var(--radius-pill);
  background:rgba(13,148,136,.1);border:1px solid rgba(13,148,136,.3);
  color:#5eead4;font-weight:700;font-size:.9rem;
  margin-bottom:1.5rem;
}
.hero-lead{color:var(--color-text-soft);font-size:clamp(15px,1.1vw,18px);line-height:1.8;max-width:680px;}
.glow-line{width:100px;height:3px;border-radius:var(--radius-pill);background:var(--gradient-button);margin:1.5rem 0;box-shadow:0 0 16px rgba(13,148,136,.4);}
.hero-img{border-radius:var(--radius-xl);border:1px solid var(--color-border);box-shadow:var(--shadow-card);overflow:hidden;}
.hero-img img{width:100%;display:block;}

/* inner page hero */
.inner-hero{padding:clamp(100px,12vw,130px) 0 clamp(32px,4vw,48px);}
.inner-hero .hero-badge{font-size:.85rem;}

/* ---- Cards ---- */
.card-base{
  background:var(--color-card);
  border:1px solid var(--color-border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:clamp(20px,2.5vw,32px);
  transition:all var(--motion-normal) var(--ease-out);
}
.card-base:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-2px);border-color:var(--color-border-strong);}
.feature-card .icon-box{
  width:52px;height:52px;border-radius:var(--radius-md);
  display:flex;align-items:center;justify-content:center;
  background:rgba(13,148,136,.12);border:1px solid rgba(13,148,136,.2);
  color:var(--color-primary);font-size:1.3rem;margin-bottom:1rem;
}
.trust-card{background:var(--color-card-alt);border-left:3px solid var(--color-secondary);}
.guide-card{background:var(--color-card-alt);border-left:3px solid var(--color-accent);}
.step-card{position:relative;padding-left:clamp(48px,5vw,64px);}
.step-card .step-num{
  position:absolute;left:16px;top:20px;
  width:32px;height:32px;border-radius:50%;
  background:var(--gradient-button);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:.9rem;
}
.plan-card{text-align:center;}
.plan-card.featured{border-color:var(--color-primary);box-shadow:0 0 24px rgba(13,148,136,.15);}
.plan-card .price{font-size:1.8rem;font-weight:900;color:var(--color-primary);margin:.5rem 0;}

/* ---- Grid Layouts ---- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap-md);}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-md);}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap-md);}
.grid-2-1{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(24px,3vw,40px);align-items:start;}
.grid-1-2{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(24px,3vw,40px);align-items:start;}
.grid-7-5{display:grid;grid-template-columns:1.4fr 1fr;gap:clamp(24px,3vw,40px);align-items:center;}
.grid-5-7{display:grid;grid-template-columns:1fr 1.4fr;gap:clamp(24px,3vw,40px);align-items:center;}
@media(max-width:900px){
  .grid-2,.grid-3,.grid-4,.grid-2-1,.grid-1-2,.grid-7-5,.grid-5-7{grid-template-columns:1fr;}
}
@media(max-width:640px){
  .grid-2{grid-template-columns:1fr;}
}

/* ---- Content / Prose ---- */
.prose{max-width:820px;}
.prose h2{margin:2rem 0 1rem;}
.prose h3{margin:1.5rem 0 .75rem;}
.prose p{color:var(--color-text-soft);line-height:var(--lh-body);}
.content-panel{
  background:var(--color-card);border:1px solid var(--color-border);
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  padding:clamp(24px,3vw,40px);
}
.sidebar-tip{
  background:var(--color-card-alt);
  border:1px solid rgba(99,102,241,.2);
  border-radius:var(--radius-card);
  padding:clamp(20px,2.5vw,28px);
}
.sidebar-tip .tip-icon{
  width:44px;height:44px;border-radius:var(--radius-sm);
  background:rgba(99,102,241,.12);color:var(--color-secondary);
  display:flex;align-items:center;justify-content:center;
  font-size:1.2rem;margin-bottom:.75rem;
}

/* ---- CTA ---- */
.cta-section{
  background:var(--gradient-cta);
  border:1px solid var(--color-border);
  border-radius:var(--radius-xl);
  padding:clamp(32px,4vw,56px);
  text-align:center;
}
.cta-inline{
  display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;margin-top:1.5rem;
}

/* ---- Tables ---- */
.table-wrap{overflow-x:auto;border-radius:var(--radius-card);border:1px solid var(--color-border);}
.data-table{width:100%;border-collapse:collapse;color:var(--color-text);}
.data-table th{background:var(--color-surface-strong);padding:14px 16px;text-align:left;font-weight:700;white-space:nowrap;}
.data-table td{padding:12px 16px;border-top:1px solid rgba(255,255,255,.06);}
.data-table tr:hover td{background:rgba(13,148,136,.04);}

/* ---- FAQ ---- */
.faq-item{
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  margin-bottom:12px;overflow:hidden;
  background:var(--color-surface);
}
.faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;background:transparent;border:none;
  color:var(--color-text);font-weight:700;font-size:1rem;
  cursor:pointer;text-align:left;gap:12px;
  transition:background var(--motion-normal);
}
.faq-btn:hover{background:rgba(13,148,136,.06);}
.faq-btn .faq-icon{
  flex-shrink:0;width:28px;height:28px;border-radius:50%;
  background:rgba(13,148,136,.12);color:var(--color-primary);
  display:flex;align-items:center;justify-content:center;
  font-size:.8rem;transition:transform var(--motion-normal);
}
.faq-btn[aria-expanded="true"] .faq-icon{transform:rotate(45deg);}
.faq-answer{
  display:none;padding:0 20px 16px;
  color:var(--color-text-soft);line-height:1.8;
}
.faq-answer.is-open{display:block;}

/* ---- Forms (login/register) ---- */
.auth-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(24px,3vw,40px);align-items:start;}
.form-card{
  background:var(--color-card);border:1px solid var(--color-border);
  border-radius:var(--radius-xl);padding:clamp(28px,3.5vw,44px);
  box-shadow:var(--shadow-card);
}
.form-group{margin-bottom:1.25rem;}
.form-label{display:block;margin-bottom:.4rem;font-weight:600;color:var(--color-text-soft);font-size:.9rem;}
.form-input{
  width:100%;padding:12px 16px;
  background:var(--color-bg);border:1.5px solid var(--color-border);
  border-radius:var(--radius-sm);color:var(--color-text);
  font-size:1rem;transition:border-color var(--motion-normal);
}
.form-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(13,148,136,.15);}
.form-btn{
  width:100%;padding:14px;background:var(--gradient-button);
  color:#fff;border:none;border-radius:var(--radius-pill);
  font-weight:800;font-size:1rem;cursor:pointer;
  box-shadow:var(--shadow-button);
  transition:all var(--motion-normal);
}
.form-btn:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(13,148,136,.35);}
.trust-badge{
  display:flex;align-items:center;gap:.5rem;
  padding:.75rem 1rem;border-radius:var(--radius-sm);
  background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.2);
  color:#86efac;font-size:.9rem;font-weight:600;
  margin-top:1rem;
}
@media(max-width:900px){.auth-layout{grid-template-columns:1fr;}}

/* ---- Breadcrumb ---- */
.breadcrumb-nav{margin-bottom:1.5rem;}
.breadcrumb{display:flex;gap:.5rem;list-style:none;padding:0;margin:0;font-size:.9rem;}
.breadcrumb-item{color:var(--color-text-muted);}
.breadcrumb-item a{color:var(--color-text-soft);}
.breadcrumb-item.active{color:var(--color-primary);}
.breadcrumb-item + .breadcrumb-item::before{content:"›";margin-right:.5rem;color:var(--color-text-muted);}

/* ---- Comparison ---- */
.compare-card{
  background:var(--color-card);border:1px solid rgba(99,102,241,.2);
  border-radius:var(--radius-xl);padding:clamp(28px,3.5vw,44px);
  box-shadow:var(--shadow-card);
}

/* ---- Testimonials ---- */
.testimonial-card{
  background:var(--color-card-alt);border:1px solid var(--color-border);
  border-radius:var(--radius-card);padding:clamp(20px,2.5vw,28px);
}
.rating-pill{
  display:inline-block;padding:.3rem .7rem;border-radius:var(--radius-pill);
  background:rgba(99,102,241,.12);border:1px solid rgba(99,102,241,.3);
  color:#c4b5fd;font-weight:700;font-size:.85rem;
}
.stars{color:#fbbf24;font-size:1rem;letter-spacing:2px;}

/* ---- Policy ---- */
.policy-layout{max-width:880px;margin:0 auto;}
.policy-toc{
  background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-md);padding:20px 24px;margin-bottom:2rem;
}
.policy-toc a{color:var(--color-text-soft);display:block;padding:6px 0;font-size:.95rem;}
.policy-toc a:hover{color:var(--color-primary);}
.policy-note{
  background:rgba(245,158,11,.06);border-left:3px solid var(--color-warning);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:16px 20px;margin:1.5rem 0;color:var(--color-text-soft);
}

/* ---- Footer ---- */
.site-footer{
  margin-top:clamp(48px,6vw,80px);
  border-top:1px solid var(--color-border);
  background:var(--color-footer-bg);
  padding:clamp(40px,5vw,64px) 0 24px;
}
.footer-grid{display:grid;grid-template-columns:1.2fr 2fr;gap:clamp(24px,3vw,48px);}
.footer-brand p{color:var(--color-footer-text);font-size:.9rem;line-height:1.7;margin-top:.75rem;}
.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}
.footer-links a{color:var(--color-footer-text);font-size:.9rem;padding:6px 0;display:block;transition:color var(--motion-normal);}
.footer-links a:hover{color:var(--color-primary);}
.footer-bottom{
  margin-top:clamp(24px,3vw,40px);padding-top:20px;
  border-top:1px solid rgba(255,255,255,.06);
  text-align:center;color:var(--color-text-muted);font-size:.85rem;
}
@media(max-width:768px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-links{grid-template-columns:repeat(2,1fr);}
}

/* ---- Checklist ---- */
.check-list{list-style:none;padding:0;}
.check-list li{padding:.4rem 0 .4rem 1.6rem;position:relative;color:var(--color-text-soft);}
.check-list li::before{content:"✓";position:absolute;left:0;color:var(--color-success);font-weight:800;}

/* ---- Image containers ---- */
.img-frame{border-radius:var(--radius-xl);overflow:hidden;border:1px solid var(--color-border);box-shadow:var(--shadow-card);}
.img-frame img{width:100%;display:block;}

/* ---- Utility ---- */
.text-center{text-align:center;}
.text-muted{color:var(--color-text-muted);}
.mb-0{margin-bottom:0;}
.mb-1{margin-bottom:.5rem;}
.mb-2{margin-bottom:1rem;}
.mb-3{margin-bottom:1.5rem;}
.mb-4{margin-bottom:2rem;}
.mt-2{margin-top:1rem;}
.mt-3{margin-top:1.5rem;}
.mt-4{margin-top:2rem;}
.gap-row{display:flex;flex-wrap:wrap;gap:12px;}

/* ---- Focus / A11y ---- */
:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:var(--radius-xs);}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;}
}

/* ---- AOS fallback ---- */
[data-aos]{opacity:1!important;transform:none!important;}

/* ---- Print ---- */
@media print{
  .site-header,.site-footer,.nav-toggle,#mobile-menu,.btn{display:none;}
  body{background:#fff;color:#000;}
}