/* ============================================================
   uuu8.click - theme.css
   Class prefix: ui40-
   Mobile-first HTML5 casino gaming site (Vietnamese)
   Palette: #00B8D4 | #1A1A1A | #8470FF | #4B0082 | #00695C
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --ui40-primary: #00B8D4;
  --ui40-secondary: #8470FF;
  --ui40-accent: #4B0082;
  --ui40-bg: #1A1A1A;
  --ui40-bg-alt: #00695C;
  --ui40-bg-deep: #0d0d0d;
  --ui40-text: #ffffff;
  --ui40-text-muted: #b8c0cc;
  --ui40-border: rgba(132, 112, 255, 0.25);
  --ui40-card-bg: #232323;
  --ui40-card-bg-alt: #2a2a2a;
  --ui40-gradient: linear-gradient(135deg, #00B8D4 0%, #8470FF 60%, #4B0082 100%);
  --ui40-gradient-alt: linear-gradient(135deg, #00695C 0%, #00B8D4 100%);
  --ui40-shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
  --ui40-shadow-glow: 0 0 18px rgba(0, 184, 212, 0.45);
  --ui40-radius: 12px;
  --ui40-radius-sm: 8px;
  --ui40-header-h: 56px;
  --ui40-bottomnav-h: 62px;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 62.5%; -webkit-text-size-adjust: 100%; }
body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background: var(--ui40-bg);
  color: var(--ui40-text);
  line-height: 1.5rem;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--ui40-primary); text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ---------- Layout ---------- */
.ui40-container { width: 100%; max-width: 430px; margin: 0 auto; padding: 0 1.2rem; }
.ui40-wrapper { width: 100%; }
.ui40-grid { display: grid; gap: 1rem; }
.ui40-section { padding: 2rem 0; }
.ui40-section-alt { background: var(--ui40-bg-deep); }

/* ---------- Header ---------- */
.ui40-header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--ui40-header-h);
  background: rgba(26, 26, 26, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--ui40-border);
  z-index: 1000;
}
.ui40-header-inner {
  max-width: 430px; margin: 0 auto; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1.2rem;
}
.ui40-logo { display: flex; align-items: center; gap: 0.6rem; }
.ui40-logo img { width: 28px; height: 28px; border-radius: 6px; }
.ui40-logo-text {
  font-size: 1.6rem; font-weight: 800;
  background: var(--ui40-gradient); -webkit-background-clip: text;
  background-clip: text; -webkit-text-fill-color: transparent;
  letter-spacing: 0.5px;
}
.ui40-header-actions { display: flex; align-items: center; gap: 0.5rem; }
.ui40-menu-toggle {
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  color: var(--ui40-text); font-size: 2rem; line-height: 1;
}

/* ---------- Buttons ---------- */
.ui40-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.7rem 1.2rem; font-size: 1.3rem; font-weight: 700;
  border-radius: var(--ui40-radius-sm); transition: transform .15s ease, box-shadow .15s ease;
  min-height: 40px; text-align: center;
}
.ui40-btn:active { transform: scale(0.96); }
.ui40-btn-register {
  background: var(--ui40-gradient); color: #fff;
  box-shadow: var(--ui40-shadow-glow);
}
.ui40-btn-login {
  background: transparent; color: var(--ui40-primary);
  border: 1px solid var(--ui40-primary);
}
.ui40-btn-promo {
  background: var(--ui40-gradient-alt); color: #fff;
  padding: 0.8rem 1.6rem; font-size: 1.4rem;
  box-shadow: 0 4px 14px rgba(0, 105, 92, 0.5);
}
.ui40-btn-block { display: flex; width: 100%; }
.ui40-text-link {
  color: var(--ui40-primary); font-weight: 600;
  border-bottom: 1px dashed rgba(0, 184, 212, 0.5);
  padding-bottom: 1px;
}

/* ---------- Mobile Menu ---------- */
.ui40-mobile-menu {
  position: fixed; top: 0; right: -100%; width: 80%; max-width: 320px;
  height: 100vh; background: var(--ui40-bg-deep);
  padding: 2rem 1.5rem; z-index: 9999;
  transition: right .3s ease; overflow-y: auto;
  border-left: 1px solid var(--ui40-border);
}
.ui40-mobile-menu.ui40-open { right: 0; }
.ui40-menu-overlay {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.6);
  z-index: 9998; display: none;
}
.ui40-menu-overlay.ui40-open { display: block; }
.ui40-menu-close { font-size: 2.4rem; color: var(--ui40-text); position: absolute; top: 1rem; right: 1.2rem; }
.ui40-menu-title { font-size: 1.6rem; font-weight: 700; margin-bottom: 1.5rem; color: var(--ui40-primary); }
.ui40-menu-list li { margin-bottom: 1rem; }
.ui40-menu-list a { display: block; padding: 1rem; background: var(--ui40-card-bg); border-radius: var(--ui40-radius-sm); color: var(--ui40-text); font-size: 1.4rem; }
.ui40-menu-list a:active { background: var(--ui40-accent); }

/* ---------- Carousel ---------- */
.ui40-carousel { position: relative; margin-top: var(--ui40-header-h); overflow: hidden; }
.ui40-carousel-track { display: flex; transition: transform .5s ease; }
.ui40-carousel-slide { min-width: 100%; position: relative; cursor: pointer; }
.ui40-carousel-slide img { width: 100%; height: auto; aspect-ratio: 16/9; object-fit: cover; }
.ui40-carousel-caption {
  position: absolute; left: 1.2rem; bottom: 1.2rem; right: 1.2rem;
  background: rgba(13, 13, 13, 0.7); padding: 0.8rem 1rem;
  border-radius: var(--ui40-radius-sm); backdrop-filter: blur(4px);
}
.ui40-carousel-caption h3 { font-size: 1.5rem; color: var(--ui40-primary); margin-bottom: 0.3rem; }
.ui40-carousel-caption p { font-size: 1.2rem; color: var(--ui40-text-muted); }
.ui40-carousel-dots { display: flex; justify-content: center; gap: 0.5rem; padding: 0.8rem 0; }
.ui40-carousel-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.3); }
.ui40-carousel-dot.ui40-active { background: var(--ui40-primary); width: 22px; border-radius: 4px; }

/* ---------- Section Titles ---------- */
.ui40-section-title {
  font-size: 1.8rem; font-weight: 800; margin-bottom: 1.2rem;
  display: flex; align-items: center; gap: 0.6rem;
}
.ui40-section-title::before {
  content: ""; width: 4px; height: 22px; background: var(--ui40-gradient); border-radius: 2px;
}
.ui40-section-subtitle { font-size: 1.3rem; color: var(--ui40-text-muted); margin-bottom: 1.5rem; }

/* ---------- Game Grid ---------- */
.ui40-game-block { padding: 1.5rem 0; }
.ui40-game-block-title {
  font-size: 1.6rem; font-weight: 800; margin: 1.5rem 0 1rem;
  display: flex; align-items: center; justify-content: space-between;
  padding-bottom: 0.6rem; border-bottom: 2px solid var(--ui40-border);
}
.ui40-game-block-title span:first-child { color: var(--ui40-primary); }
.ui40-game-block-title .ui40-tag {
  font-size: 1.1rem; padding: 0.2rem 0.8rem; border-radius: 999px;
  background: var(--ui40-accent); color: #fff; font-weight: 600;
}
.ui40-game-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.8rem; }
.ui40-game-card {
  background: var(--ui40-card-bg); border-radius: var(--ui40-radius-sm);
  overflow: hidden; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease;
  border: 1px solid transparent;
}
.ui40-game-card:active { transform: scale(0.96); border-color: var(--ui40-primary); }
.ui40-game-card img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.ui40-game-card-name {
  font-size: 1.1rem; padding: 0.5rem; text-align: center; color: var(--ui40-text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ---------- Cards / Modules ---------- */
.ui40-card {
  background: var(--ui40-card-bg); border-radius: var(--ui40-radius);
  padding: 1.5rem; margin-bottom: 1.2rem; border: 1px solid var(--ui40-border);
}
.ui40-card h3 { font-size: 1.5rem; color: var(--ui40-primary); margin-bottom: 0.8rem; }
.ui40-card p { font-size: 1.3rem; color: var(--ui40-text-muted); margin-bottom: 0.8rem; line-height: 1.6rem; }
.ui40-card ul { margin: 0.8rem 0; padding-left: 1.2rem; }
.ui40-card ul li { font-size: 1.3rem; color: var(--ui40-text-muted); margin-bottom: 0.5rem; list-style: disc; }

.ui40-feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.8rem; }
.ui40-feature-item {
  background: var(--ui40-card-bg-alt); padding: 1.2rem; border-radius: var(--ui40-radius-sm);
  text-align: center;
}
.ui40-feature-item .ui40-feature-icon { font-size: 2.4rem; color: var(--ui40-primary); margin-bottom: 0.5rem; }
.ui40-feature-item h4 { font-size: 1.3rem; color: var(--ui40-text); margin-bottom: 0.3rem; }
.ui40-feature-item p { font-size: 1.1rem; color: var(--ui40-text-muted); }

/* ---------- Testimonials ---------- */
.ui40-testimonial-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.ui40-testimonial {
  background: var(--ui40-card-bg); padding: 1.2rem; border-radius: var(--ui40-radius-sm);
  border-left: 3px solid var(--ui40-secondary);
}
.ui40-testimonial p { font-size: 1.3rem; color: var(--ui40-text); margin-bottom: 0.8rem; font-style: italic; }
.ui40-testimonial-author { font-size: 1.2rem; color: var(--ui40-primary); font-weight: 600; }

/* ---------- Payment ---------- */
.ui40-payment-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.8rem; }
.ui40-payment-item {
  background: var(--ui40-card-bg); padding: 1rem; border-radius: var(--ui40-radius-sm);
  text-align: center; border: 1px solid var(--ui40-border);
}
.ui40-payment-item .ui40-payment-icon { font-size: 2rem; color: var(--ui40-secondary); margin-bottom: 0.3rem; }
.ui40-payment-item span { font-size: 1.1rem; color: var(--ui40-text); }

/* ---------- Winners ---------- */
.ui40-winner-list { display: flex; flex-direction: column; gap: 0.6rem; }
.ui40-winner {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--ui40-card-bg); padding: 0.8rem 1rem; border-radius: var(--ui40-radius-sm);
}
.ui40-winner-name { font-size: 1.2rem; color: var(--ui40-text); }
.ui40-winner-game { font-size: 1.1rem; color: var(--ui40-text-muted); }
.ui40-winner-amount { font-size: 1.3rem; color: var(--ui40-primary); font-weight: 700; }

/* ---------- FAQ ---------- */
.ui40-faq-item { background: var(--ui40-card-bg); border-radius: var(--ui40-radius-sm); margin-bottom: 0.8rem; overflow: hidden; }
.ui40-faq-q { padding: 1rem 1.2rem; font-size: 1.3rem; font-weight: 600; color: var(--ui40-text); display: flex; justify-content: space-between; align-items: center; cursor: pointer; }
.ui40-faq-q .ui40-faq-icon { color: var(--ui40-primary); font-size: 1.6rem; }
.ui40-faq-a { padding: 0 1.2rem 1rem; font-size: 1.2rem; color: var(--ui40-text-muted); display: none; line-height: 1.6rem; }
.ui40-faq-item.ui40-open .ui40-faq-a { display: block; }
.ui40-faq-item.ui40-open .ui40-faq-icon { transform: rotate(45deg); }

/* ---------- App Download CTA ---------- */
.ui40-app-cta {
  background: var(--ui40-gradient-alt); padding: 1.8rem; border-radius: var(--ui40-radius);
  text-align: center; margin: 1.5rem 0;
}
.ui40-app-cta h3 { font-size: 1.6rem; color: #fff; margin-bottom: 0.5rem; }
.ui40-app-cta p { font-size: 1.2rem; color: rgba(255,255,255,0.9); margin-bottom: 1rem; }
.ui40-app-cta .ui40-btn { background: #fff; color: var(--ui40-bg-alt); }

/* ---------- Promo Banner ---------- */
.ui40-promo-banner {
  background: var(--ui40-gradient); padding: 1.5rem; border-radius: var(--ui40-radius);
  text-align: center; margin: 1.5rem 0; box-shadow: var(--ui40-shadow-glow);
}
.ui40-promo-banner h3 { font-size: 1.6rem; color: #fff; margin-bottom: 0.5rem; }
.ui40-promo-banner p { font-size: 1.2rem; color: rgba(255,255,255,0.95); margin-bottom: 1rem; }
.ui40-promo-banner .ui40-btn { background: #fff; color: var(--ui40-accent); }

/* ---------- Footer ---------- */
.ui40-footer { background: var(--ui40-bg-deep); padding: 2rem 0 1rem; margin-top: 2rem; }
.ui40-footer-brand { font-size: 1.3rem; color: var(--ui40-text-muted); margin-bottom: 1.5rem; line-height: 1.6rem; }
.ui40-footer-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.8rem; margin-bottom: 1.5rem; }
.ui40-footer-links a { font-size: 1.2rem; color: var(--ui40-text-muted); padding: 0.5rem 0; }
.ui40-footer-promo { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 1.5rem; }
.ui40-footer-promo .ui40-btn { flex: 1; min-width: 45%; font-size: 1.2rem; padding: 0.6rem 0.8rem; }
.ui40-footer-copy { font-size: 1.1rem; color: var(--ui40-text-muted); text-align: center; padding-top: 1.2rem; border-top: 1px solid var(--ui40-border); }

/* ---------- Mobile Bottom Nav ---------- */
.ui40-bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0;
  height: var(--ui40-bottomnav-h);
  background: rgba(13, 13, 13, 0.98);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--ui40-border);
  display: flex; justify-content: space-around; align-items: center;
  z-index: 1000;
}
.ui40-bottom-nav-item {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; min-width: 60px; min-height: 60px;
  color: var(--ui40-text-muted); transition: color .15s ease, transform .15s ease;
  text-decoration: none;
}
.ui40-bottom-nav-item:active { transform: scale(0.92); }
.ui40-bottom-nav-item .ui40-bn-icon { font-size: 2.2rem; line-height: 1; }
.ui40-bottom-nav-item .ui40-bn-label { font-size: 1rem; line-height: 1; }
.ui40-bottom-nav-item.ui40-active { color: var(--ui40-primary); }
.ui40-bottom-nav-item.ui40-active .ui40-bn-icon { text-shadow: 0 0 8px rgba(0, 184, 212, 0.6); }
.ui40-bottom-nav-item.ui40-promo { color: var(--ui40-secondary); }

/* ---------- Main padding ---------- */
.ui40-main { padding-bottom: 80px; }

/* ---------- Desktop ---------- */
@media (min-width: 769px) {
  .ui40-bottom-nav { display: none; }
  .ui40-container { max-width: 960px; }
  .ui40-header-inner { max-width: 960px; }
  .ui40-game-grid { grid-template-columns: repeat(6, 1fr); }
  .ui40-feature-grid { grid-template-columns: repeat(4, 1fr); }
  .ui40-testimonial-grid { grid-template-columns: repeat(3, 1fr); }
  .ui40-payment-grid { grid-template-columns: repeat(6, 1fr); }
  .ui40-footer-links { grid-template-columns: repeat(4, 1fr); }
  .ui40-main { padding-bottom: 0; }
  .ui40-menu-toggle { display: none; }
  .ui40-desktop-nav { display: flex; gap: 1.2rem; }
  .ui40-desktop-nav a { color: var(--ui40-text-muted); font-size: 1.3rem; }
}
.ui40-desktop-nav { display: none; }

/* ---------- Helpers ---------- */
.ui40-text-center { text-align: center; }
.ui40-mt-1 { margin-top: 1rem; }
.ui40-mt-2 { margin-top: 2rem; }
.ui40-mb-1 { margin-bottom: 1rem; }
.ui40-mb-2 { margin-bottom: 2rem; }
.ui40-hidden { display: none; }