/* ============================================================
   u666.homes - Core Stylesheet (uifb- prefix)
   Mobile-first HTML5 gaming site for Vietnam market
   Palette: #1A1A1A | #FF91A4 | #8B4513 | #FA8072 | #AD1457
   ============================================================ */
:root {
  --uifb-bg: #1A1A1A;
  --uifb-bg-2: #241016;
  --uifb-primary: #FF91A4;
  --uifb-secondary: #FA8072;
  --uifb-accent: #AD1457;
  --uifb-gold: #8B4513;
  --uifb-text: #FFFFFF;
  --uifb-text-soft: #F2D7DD;
  --uifb-card-bg: #2a1419;
  --uifb-border: rgba(255, 145, 164, 0.25);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 62.5%; }
body {
  font-family: "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(circle at top, #2a1419 0%, #1A1A1A 65%);
  color: var(--uifb-text);
  line-height: 1.5rem;
  max-width: 430px;
  margin: 0 auto;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.uifb-header {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  background: linear-gradient(90deg, #1A1A1A, #2a1419);
  border-bottom: 1px solid var(--uifb-border);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  min-height: 56px;
}
.uifb-logo { display: flex; align-items: center; gap: 0.6rem; font-weight: 800; font-size: 1.6rem; color: var(--uifb-primary); letter-spacing: 0.5px; }
.uifb-logo img { width: 28px; height: 28px; border-radius: 6px; object-fit: cover; }
.uifb-logo .uifb-logo-tag { font-size: 1rem; color: var(--uifb-text-soft); font-weight: 500; }
.uifb-nav-actions { display: flex; align-items: center; gap: 0.6rem; }
.uifb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: none;
  border-radius: 999px;
  padding: 0.7rem 1.2rem;
  font-size: 1.2rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s;
  min-height: 36px;
}
.uifb-btn-login { background: transparent; color: var(--uifb-primary); border: 1px solid var(--uifb-primary); }
.uifb-btn-login:hover { background: rgba(255,145,164,0.12); }
.uifb-btn-register { background: linear-gradient(90deg, #FF91A4, #AD1457); color: #fff; box-shadow: 0 4px 12px rgba(173, 20, 87, 0.45); }
.uifb-btn-register:hover, .uifb-btn:focus { transform: translateY(-1px); }
.uifb-menu-toggle {
  background: transparent;
  border: none;
  color: var(--uifb-primary);
  font-size: 1.8rem;
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.uifb-mobile-menu {
  position: fixed;
  top: 56px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  background: #2a1419;
  border-bottom: 1px solid var(--uifb-border);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  z-index: 9999;
}
.uifb-mobile-menu.uifb-menu-open { max-height: 520px; padding: 0.5rem 1rem 1rem; overflow-y: auto; }
.uifb-mobile-menu a { display: block; padding: 1rem 0.6rem; color: var(--uifb-text-soft); border-bottom: 1px dashed rgba(255,145,164,0.15); font-size: 1.3rem; }
.uifb-mobile-menu a:hover { color: var(--uifb-primary); }
main.uifb-main { padding-top: 64px; padding-bottom: 16px; }
.uifb-section { padding: 1.6rem 1rem; }
.uifb-section-title { font-size: 1.8rem; font-weight: 800; color: var(--uifb-primary); margin-bottom: 0.8rem; display: flex; align-items: center; gap: 0.6rem; line-height: 1.25; }
.uifb-section-title::before { content: ""; display: inline-block; width: 4px; min-width: 4px; height: 18px; background: linear-gradient(180deg, #FF91A4, #AD1457); border-radius: 4px; }
.uifb-subtitle { font-size: 1.3rem; color: var(--uifb-text-soft); margin: 0.6rem 0 1rem; }
.uifb-carousel { position: relative; overflow: hidden; border-radius: 14px; margin: 1rem; box-shadow: 0 6px 18px rgba(0,0,0,0.5); }
.uifb-carousel-track { display: flex; transition: transform 0.5s ease; }
.uifb-slide { min-width: 100%; position: relative; cursor: pointer; }
.uifb-slide img { width: 100%; height: 180px; object-fit: cover; }
.uifb-slide .uifb-slide-cap { position: absolute; left: 12px; bottom: 12px; background: linear-gradient(90deg, rgba(173,20,87,0.85), rgba(255,145,164,0.6)); padding: 0.5rem 0.9rem; border-radius: 8px; font-size: 1.2rem; font-weight: 700; }
.uifb-carousel-dots { position: absolute; bottom: 10px; right: 14px; display: flex; gap: 6px; }
.uifb-dot { width: 8px; height: 8px; background: rgba(255,255,255,0.5); border-radius: 50%; cursor: pointer; }
.uifb-dot.uifb-dot-active { background: var(--uifb-primary); width: 18px; border-radius: 6px; }
.uifb-hero { text-align: center; padding: 1.6rem 1rem 0.6rem; }
.uifb-hero h1 { font-size: 2.2rem; font-weight: 800; color: var(--uifb-primary); line-height: 1.25; margin-bottom: 0.8rem; text-shadow: 0 2px 10px rgba(173, 20, 87, 0.6); }
.uifb-hero p { font-size: 1.25rem; color: var(--uifb-text-soft); margin-bottom: 1.2rem; }
.uifb-cta-row { display: flex; gap: 0.8rem; justify-content: center; margin: 1rem 0; flex-wrap: wrap; }
.uifb-cta-row .uifb-btn { font-size: 1.25rem; padding: 0.9rem 1.4rem; }
.uifb-filter-bar { display: flex; gap: 0.5rem; overflow-x: auto; padding: 0.6rem 1rem 0.8rem; scrollbar-width: none; }
.uifb-filter-bar::-webkit-scrollbar { display: none; }
.uifb-filter-tab { white-space: nowrap; padding: 0.55rem 1.1rem; font-size: 1.2rem; font-weight: 700; border-radius: 999px; background: #2a1419; color: var(--uifb-text-soft); border: 1px solid var(--uifb-border); cursor: pointer; min-height: 36px; display: inline-flex; align-items: center; gap: 0.3rem; }
.uifb-filter-tab.uifb-tab-active { background: linear-gradient(90deg, #FF91A4, #AD1457); color: #fff; border-color: transparent; }
.uifb-game-group { margin: 0.6rem 0 0.4rem; }
.uifb-game-group-title { font-size: 1.4rem; font-weight: 800; color: var(--uifb-secondary); margin: 0.8rem 1rem 0.4rem; display: flex; align-items: center; gap: 0.4rem; line-height: 1.25; }
.uifb-game-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; padding: 0.4rem 1rem; }
.uifb-game-card { background: var(--uifb-card-bg); border: 1px solid var(--uifb-border); border-radius: 10px; padding: 0.5rem; text-align: center; cursor: pointer; transition: transform 0.18s ease, box-shadow 0.18s; min-height: 126px; }
.uifb-game-card:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(255, 145, 164, 0.25); border-color: var(--uifb-primary); }
.uifb-game-card img { width: 100%; height: 80px; object-fit: cover; border-radius: 8px; margin-bottom: 0.4rem; }
.uifb-game-card .uifb-game-name { font-size: 1.05rem; color: var(--uifb-text-soft); line-height: 1.2; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; min-height: 2.4rem; }
.uifb-game-card .uifb-game-hot { display: inline-block; background: var(--uifb-accent); color: #fff; font-size: 0.9rem; font-weight: 700; padding: 0 0.4rem; border-radius: 4px; margin-bottom: 0.3rem; }
.uifb-card { background: var(--uifb-card-bg); border: 1px solid var(--uifb-border); border-radius: 12px; padding: 1rem; margin: 0.8rem 1rem; box-shadow: 0 4px 12px rgba(0,0,0,0.3); }
.uifb-card h2, .uifb-card h3 { color: var(--uifb-primary); margin-bottom: 0.5rem; line-height: 1.25; }
.uifb-card h2 { font-size: 1.45rem; }
.uifb-card h3 { font-size: 1.25rem; }
.uifb-card p { font-size: 1.15rem; color: var(--uifb-text-soft); margin-bottom: 0.6rem; }
.uifb-card ul { list-style: none; padding-left: 0; }
.uifb-card li { position: relative; padding: 0.4rem 0 0.4rem 1.3rem; font-size: 1.15rem; color: var(--uifb-text-soft); }
.uifb-card li::before { content: "\f005"; font-family: "Font Awesome 6 Free"; font-weight: 900; position: absolute; left: 0; color: var(--uifb-primary); font-size: 0.95rem; }
.uifb-promo-link { color: var(--uifb-primary); font-weight: 800; cursor: pointer; border-bottom: 2px dashed transparent; transition: border-color 0.2s; }
.uifb-promo-link:hover { border-bottom-color: var(--uifb-primary); }
.uifb-promo-banner { display: block; margin: 0.8rem 1rem; padding: 1.1rem; border-radius: 12px; text-align: center; font-weight: 800; font-size: 1.3rem; color: #fff; background: linear-gradient(90deg, #AD1457, #FF91A4); box-shadow: 0 6px 16px rgba(173,20,87,0.5); cursor: pointer; }
.uifb-testimonials { display: grid; gap: 0.6rem; padding: 0.6rem 1rem; }
.uifb-testimonial { background: var(--uifb-card-bg); border-left: 3px solid var(--uifb-primary); border-radius: 8px; padding: 0.8rem; }
.uifb-testimonial .uifb-t-author { font-weight: 800; color: var(--uifb-primary); font-size: 1.15rem; }
.uifb-testimonial p { font-size: 1.1rem; color: var(--uifb-text-soft); margin-top: 0.3rem; }
.uifb-payment-row { display: flex; gap: 0.5rem; flex-wrap: wrap; padding: 0.6rem 1rem; }
.uifb-payment { background: var(--uifb-card-bg); border: 1px solid var(--uifb-border); border-radius: 8px; padding: 0.5rem 0.9rem; font-size: 1.1rem; color: var(--uifb-text-soft); font-weight: 700; display: inline-flex; align-items: center; gap: 0.3rem; }
.uifb-winner-list { display: grid; gap: 0.4rem; padding: 0.4rem 1rem; }
.uifb-winner { display: flex; justify-content: space-between; gap: 0.6rem; background: var(--uifb-card-bg); border-radius: 8px; padding: 0.5rem 0.8rem; font-size: 1.1rem; }
.uifb-winner .uifb-w-name { color: var(--uifb-text-soft); }
.uifb-winner .uifb-w-amount { color: var(--uifb-primary); font-weight: 800; white-space: nowrap; }
.uifb-footer { background: #14080c; border-top: 1px solid var(--uifb-border); padding: 1.4rem 1rem 2.2rem; margin-top: 1.2rem; }
.uifb-footer-brand { font-size: 1.15rem; color: var(--uifb-text-soft); margin-bottom: 0.8rem; }
.uifb-footer-links { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.6rem 0; }
.uifb-footer-links a { background: #2a1419; border: 1px solid var(--uifb-border); color: var(--uifb-primary); padding: 0.4rem 0.8rem; border-radius: 999px; font-size: 1.05rem; font-weight: 700; cursor: pointer; }
.uifb-footer-links a:hover { background: linear-gradient(90deg, #FF91A4, #AD1457); color: #fff; }
.uifb-copyright { font-size: 1rem; color: #9a8a92; text-align: center; margin-top: 0.8rem; }
.uifb-bottom-nav { position: fixed; bottom: 0; left: 50%; transform: translateX(-50%); width: 100%; max-width: 430px; height: 62px; background: linear-gradient(180deg, #2a1419, #1A1A1A); border-top: 1px solid var(--uifb-border); display: flex; justify-content: space-around; align-items: center; z-index: 1000; box-shadow: 0 -4px 14px rgba(0,0,0,0.5); }
.uifb-bnav-btn { flex: 1; min-width: 60px; min-height: 60px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; background: transparent; border: none; color: var(--uifb-text-soft); cursor: pointer; transition: transform 0.18s, color 0.18s; }
.uifb-bnav-btn .uifb-bnav-icon { font-size: 22px; line-height: 1; }
.uifb-bnav-btn .uifb-bnav-icon.material-icons { font-size: 24px; }
.uifb-bnav-btn .uifb-bnav-label { font-size: 11px; font-weight: 700; }
.uifb-bnav-btn:hover, .uifb-bnav-btn.uifb-bnav-active { color: var(--uifb-primary); transform: translateY(-2px); }
.uifb-bnav-btn.uifb-bnav-active .uifb-bnav-icon { text-shadow: 0 0 8px rgba(255, 145, 164, 0.7); }
.uifb-pulse { animation: uifbPulse 1.8s infinite; }
@keyframes uifbPulse { 0%, 100% { transform: translateY(-2px) scale(1); } 50% { transform: translateY(-2px) scale(1.08); } }
@media (min-width: 769px) { .uifb-bottom-nav { display: none; } body { max-width: 480px; } }
@media (max-width: 768px) { main.uifb-main { padding-bottom: 80px; } }
@media (max-width: 360px) { .uifb-game-grid { grid-template-columns: repeat(2, 1fr); } .uifb-hero h1 { font-size: 1.9rem; } .uifb-btn { padding: 0.65rem 0.9rem; } }