/* BDG Game — Lightweight SEO-Optimized Stylesheet */
/* Mobile-first | Dark Gaming Theme | Zero Dependencies */

/* ===== CSS RESET & BASE ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0a12;--bg-card:#12121e;--bg-card-hover:#1a1a2e;
  --text:#e2e2f0;--text-muted:#8888a8;--text-heading:#ffffff;
  --primary:#6366f1;--primary-hover:#818cf8;
  --accent:#10b981;--accent-hover:#34d399;
  --gold:#f59e0b;--gold-hover:#fbbf24;
  --red:#ef4444;--violet:#8b5cf6;--green:#22c55e;
  --border:#1e1e35;--radius:10px;--radius-sm:6px;
  --max-w:1140px;--transition:0.2s ease;
  --font:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,sans-serif;
}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-hover)}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{color:var(--text-heading);line-height:1.3;font-weight:700}
h1{font-size:clamp(1.75rem,4vw,2.75rem);margin-bottom:.75rem}
h2{font-size:clamp(1.4rem,3vw,2rem);margin-bottom:.6rem}
h3{font-size:clamp(1.15rem,2.5vw,1.5rem);margin-bottom:.5rem}
p{margin-bottom:1rem}

/* ===== LAYOUT ===== */
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 1rem}
.section{padding:3rem 0}
.section:nth-child(even){background:var(--bg-card)}

/* ===== SKIP LINK (Accessibility) ===== */
.skip-link{position:absolute;top:-100%;left:0;background:var(--primary);color:#fff;padding:.5rem 1rem;z-index:9999;font-weight:600}
.skip-link:focus{top:0}

/* ===== HEADER & NAV ===== */
.header{background:rgba(10,10,18,.95);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);position:sticky;top:0;z-index:100;border-bottom:1px solid var(--border);padding:.75rem 0}
.header .container{display:flex;align-items:center;justify-content:space-between;position:relative}
.logo{font-size:1.4rem;font-weight:800;color:var(--text-heading);letter-spacing:-.02em;flex-shrink:0}
.logo span{color:var(--primary)}
.nav{display:flex;align-items:center}
.nav-list{display:flex;gap:1.5rem;align-items:center}
.nav-list a{color:var(--text-muted);font-size:.9rem;font-weight:500;transition:color var(--transition)}
.nav-list a:hover,.nav-list a[aria-current="page"]{color:var(--primary)}
.nav-toggle{display:none;background:none;border:none;color:var(--text-heading);font-size:1.6rem;cursor:pointer;padding:.35rem;line-height:1;z-index:101}

/* Mobile Nav */
@media(max-width:768px){
  .nav-toggle{display:block}
  .nav{position:static}
  .nav-list{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg-card);flex-direction:column;padding:0;gap:0;border-bottom:2px solid var(--primary);box-shadow:0 8px 24px rgba(0,0,0,.4);z-index:100}
  .nav-list.active{display:flex}
  .nav-list li{width:100%}
  .nav-list a{display:block;padding:.9rem 1.25rem;width:100%;border-bottom:1px solid var(--border);font-size:1rem}
  .nav-list a:last-child{border-bottom:none}
  .nav-list a:hover,.nav-list a[aria-current="page"]{background:rgba(99,102,241,.1)}
}

/* ===== BREADCRUMBS ===== */
.breadcrumbs{padding:.75rem 0;font-size:.85rem;color:var(--text-muted)}
.breadcrumbs a{color:var(--text-muted)}
.breadcrumbs a:hover{color:var(--primary)}
.breadcrumbs span{margin:0 .4rem;opacity:.5}

/* ===== HERO ===== */
.hero{padding:4rem 0 3rem;text-align:center;background:linear-gradient(180deg,rgba(99,102,241,.08) 0%,transparent 100%)}
.hero h1{margin-bottom:.5rem}
.hero .subtitle{font-size:clamp(1rem,2vw,1.25rem);color:var(--text-muted);margin-bottom:1.5rem;max-width:640px;margin-left:auto;margin-right:auto}
.hero-actions{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.75rem;border-radius:var(--radius);font-weight:600;font-size:.95rem;border:none;cursor:pointer;transition:all var(--transition);text-align:center}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-1px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-gold{background:var(--gold);color:#000}
.btn-gold:hover{background:var(--gold-hover);color:#000;transform:translateY(-1px)}

/* ===== CARDS ===== */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;transition:all var(--transition)}
.card:hover{border-color:var(--primary);transform:translateY(-2px)}
.card h3{margin-bottom:.5rem}
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;margin-top:1.5rem}

/* ===== FEATURE LIST ===== */
.feature-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;margin:1.5rem 0}
.feature-item{display:flex;gap:.75rem;align-items:flex-start;padding:1rem;background:var(--bg-card);border-radius:var(--radius-sm);border:1px solid var(--border)}
.feature-icon{width:40px;height:40px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0;background:rgba(99,102,241,.15);color:var(--primary)}
.feature-item h3{font-size:1rem;margin-bottom:.25rem}
.feature-item p{font-size:.9rem;color:var(--text-muted);margin:0}

/* ===== STEPS ===== */
.steps{counter-reset:step;margin:1.5rem 0}
.step{display:flex;gap:1rem;align-items:flex-start;padding:1rem 0;border-bottom:1px solid var(--border);counter-increment:step}
.step:last-child{border-bottom:none}
.step::before{content:counter(step);width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;flex-shrink:0}
.step p{margin:0;padding-top:.35rem}

/* ===== TABLE ===== */
.table-wrap{overflow-x:auto;margin:1.5rem 0;border-radius:var(--radius);border:1px solid var(--border)}
table{width:100%;border-collapse:collapse;font-size:.9rem}
thead{background:rgba(99,102,241,.1)}
th,td{padding:.75rem 1rem;text-align:left;border-bottom:1px solid var(--border)}
th{font-weight:600;color:var(--text-heading);font-size:.85rem;text-transform:uppercase;letter-spacing:.03em}
tr:last-child td{border-bottom:none}

/* ===== FAQ SECTION ===== */
.faq{margin:2rem 0}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:.75rem;overflow:hidden}
.faq-q{width:100%;padding:1rem 1.25rem;background:var(--bg-card);border:none;color:var(--text-heading);font-size:1rem;font-weight:600;text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:var(--font);transition:background var(--transition)}
.faq-q:hover{background:var(--bg-card-hover)}
.faq-q::after{content:'+';font-size:1.3rem;color:var(--primary);flex-shrink:0;margin-left:1rem;transition:transform var(--transition)}
.faq-item.open .faq-q::after{content:'-'}
.faq-a{padding:0 1.25rem;max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;color:var(--text-muted);font-size:.95rem;line-height:1.7}
.faq-item.open .faq-a{max-height:500px;padding:0 1.25rem 1rem}

/* ===== COLOUR BOXES (Colour Prediction) ===== */
.color-boxes{display:flex;gap:1rem;justify-content:center;margin:1.5rem 0;flex-wrap:wrap}
.color-box{width:100px;height:100px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem;color:#fff}
.color-box.red{background:var(--red)}
.color-box.green{background:var(--green)}
.color-box.violet{background:var(--violet)}

/* ===== CTA BANNER ===== */
.cta-banner{background:linear-gradient(135deg,rgba(99,102,241,.15),rgba(139,92,246,.1));border:1px solid rgba(99,102,241,.3);border-radius:var(--radius);padding:2rem;text-align:center;margin:2rem 0}
.cta-banner h2{margin-bottom:.5rem}
.cta-banner p{color:var(--text-muted);margin-bottom:1rem}

/* ===== ALERT / WARNING ===== */
.alert{padding:1rem 1.25rem;border-radius:var(--radius-sm);margin:1.5rem 0;font-size:.9rem;border-left:4px solid}
.alert-warning{background:rgba(245,158,11,.08);border-color:var(--gold);color:var(--gold)}
.alert-info{background:rgba(99,102,241,.08);border-color:var(--primary);color:var(--text)}

/* ===== FOOTER ===== */
.footer{background:var(--bg-card);border-top:1px solid var(--border);padding:3rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;margin-bottom:2rem}
.footer h4{color:var(--text-heading);margin-bottom:.75rem;font-size:1rem}
.footer ul li{margin-bottom:.4rem}
.footer ul a{color:var(--text-muted);font-size:.9rem}
.footer ul a:hover{color:var(--primary)}
.footer-bottom{text-align:center;padding-top:1.5rem;border-top:1px solid var(--border);color:var(--text-muted);font-size:.85rem}

/* ===== SUPPORT CHANNELS (Customer Care) ===== */
.support-channels{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin:1.5rem 0}
.channel{text-align:center;padding:1.5rem;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius)}
.channel-icon{font-size:2rem;margin-bottom:.5rem}
.channel h3{font-size:1rem;margin-bottom:.25rem}
.channel p{font-size:.85rem;color:var(--text-muted);margin:0}

/* ===== INTERNAL LINK BLOCKS ===== */
.related-pages{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin:2rem 0}
.related-page{display:block;padding:1.25rem;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:all var(--transition);color:var(--text)}
.related-page:hover{border-color:var(--primary);transform:translateY(-2px);color:var(--text)}
.related-page h3{font-size:1rem;color:var(--primary);margin-bottom:.25rem}
.related-page p{font-size:.85rem;color:var(--text-muted);margin:0}

/* ===== UTILITY ===== */
.text-center{text-align:center}
.text-muted{color:var(--text-muted)}
.mt-1{margin-top:1rem}.mt-2{margin-top:2rem}.mb-1{margin-bottom:1rem}.mb-2{margin-bottom:2rem}
.highlight{color:var(--gold);font-weight:600}
.tag{display:inline-block;padding:.2rem .6rem;border-radius:var(--radius-sm);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.03em}
.tag-green{background:rgba(16,185,129,.15);color:var(--accent)}
.tag-gold{background:rgba(245,158,11,.15);color:var(--gold)}
.tag-primary{background:rgba(99,102,241,.15);color:var(--primary)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ===== RESPONSIVE FINE-TUNING ===== */
@media(max-width:480px){
  .hero{padding:2.5rem 0 2rem}
  .section{padding:2rem 0}
  .card{padding:1.25rem}
  .color-boxes{gap:.5rem}
  .color-box{width:80px;height:80px;font-size:.95rem}
  .hero-actions{flex-direction:column;align-items:center}
  .btn{width:100%;justify-content:center}
}
@media(min-width:769px){
  .container{padding:0 2rem}
}