/* =========================================================
   RESPONSIVE & MOBILE OPTIMIZATION SYSTEM - VAN88
   Covers: 320px, 375px, 414px, 600px, 768px, 900px, 1200px
   ========================================================= */

/* Prevent horizontal scroll globally */
html, body {
  overflow-x: hidden !important;
  max-width: 100vw !important;
  -webkit-text-size-adjust: 100%;
}

/* ================= 1200PX BREAKPOINT ================= */
@media (max-width: 1200px) {
  .lobby-nav-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .sportsbook-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .games-row-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .top-event-banner-img {
    max-width: 360px;
  }
}

/* ================= 900PX BREAKPOINT (TABLET / PHABLET) ================= */
@media (max-width: 900px) {
  /* Header Adjustments */
  .top-center-banner-link,
  .top-center-banner {
    display: none !important;
  }
  
  .top-header {
    padding: 0 12px;
    height: 56px;
  }

  .logo-van88-img {
    height: 32px;
  }

  /* Sidebar Drawer */
  .sidebar {
    left: -250px;
    width: 240px;
    top: 56px;
    bottom: 0;
    z-index: 1050;
    box-shadow: 4px 0 25px rgba(0, 0, 0, 0.85);
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .sidebar.mobile-open {
    left: 0;
  }

  /* Main Wrapper Margin Reset */
  .main-wrapper {
    margin-left: 0 !important;
    width: 100% !important;
    padding: 12px !important;
    padding-top: 66px !important;
  }

  /* Grids */
  .lobby-nav-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
  }

  .sportsbook-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .games-row-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .footer-nav-columns {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
}

/* ================= 768PX BREAKPOINT (MOBILE LANDSCAPE & TABLET) ================= */
@media (max-width: 768px) {
  /* Articles & Typography */
  .seo-article-wrapper {
    padding: 22px 14px !important;
    border-radius: 10px;
    font-size: 13.5px;
    line-height: 1.7;
    margin-bottom: 24px;
  }

  .seo-article-wrapper h1 {
    font-size: 19px !important;
    line-height: 1.35;
  }

  .seo-article-wrapper h2 {
    font-size: 17px !important;
    padding-left: 10px;
    margin: 22px 0 10px;
  }

  .seo-article-wrapper h3 {
    font-size: 15px !important;
    margin: 16px 0 8px;
  }

  .seo-article-wrapper ul,
  .seo-article-wrapper ol {
    margin-left: 18px;
    margin-bottom: 14px;
  }

  /* SEO Hero Badge on Home */
  .van88-hero-seo-badge {
    padding: 16px 14px;
    margin-bottom: 18px;
    border-radius: 10px;
  }

  .van88-seo-h1-wrap h1 {
    font-size: 17px;
    line-height: 1.4;
  }

  .van88-seo-h1-wrap .seo-sub {
    font-size: 12.5px;
    line-height: 1.55;
    margin-bottom: 12px;
  }

  .seo-highlights-pills {
    gap: 6px;
  }

  .seo-highlights-pills .pill {
    padding: 4px 8px;
    font-size: 11px;
  }

  /* TOC Box */
  .toc-box {
    padding: 14px 16px;
    margin: 16px 0 22px;
  }

  .toc-title {
    font-size: 14px;
  }

  .toc-list a {
    font-size: 13px;
  }

  /* Tables Scrollable on Mobile */
  .van-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 16px 0;
    border-radius: 6px;
  }

  .van-table {
    font-size: 12px;
    min-width: 480px;
  }

  .van-table th, .van-table td {
    padding: 8px 10px;
  }

  /* CTA Box */
  .article-cta-box {
    padding: 20px 14px;
    margin: 24px 0;
  }

  .article-cta-title {
    font-size: 17px;
    line-height: 1.35;
  }

  .article-cta-desc {
    font-size: 13px;
    margin-bottom: 16px;
  }

  .article-cta-btn {
    padding: 10px 24px;
    font-size: 13px;
    width: 100%;
    text-align: center;
    box-sizing: border-box;
  }

  /* Section Headings */
  .section-banner-head {
    padding: 8px 12px;
    margin-bottom: 14px;
  }

  .head-title-wrap h2 {
    font-size: 15px;
  }

  .head-title-wrap .title-icon {
    font-size: 17px;
  }

  /* FAQ Items */
  .faq-q {
    padding: 12px 14px;
    font-size: 13px;
  }

  .faq-a {
    font-size: 12.5px;
    padding: 0 14px;
  }

  .faq-item-box.active .faq-a {
    padding: 0 14px 14px;
  }

  /* Footer */
  .footer-nav-columns {
    grid-template-columns: 1fr !important;
    gap: 20px;
  }
}

/* ================= 600PX BREAKPOINT (STANDARD MOBILE) ================= */
@media (max-width: 600px) {
  /* Top Actions Compact */
  .top-right-actions .top-action-item {
    display: none !important;
  }

  .top-right-actions {
    gap: 6px;
  }

  .btn-agent {
    padding: 5px 8px;
    font-size: 11px;
  }

  .btn-agent .badge-pill {
    display: none;
  }

  .btn-reg-top, .btn-login-top {
    padding: 5px 10px;
    font-size: 11px;
  }

  .btn-reg-top .badge-pill {
    display: none;
  }

  /* Lobby Grid 4 columns */
  .lobby-nav-grid {
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 6px;
  }

  .lobby-nav-card {
    padding: 8px 4px;
    border-radius: 8px;
  }

  .lobby-nav-card .nav-icon {
    font-size: 20px;
    margin-bottom: 4px;
  }

  .lobby-nav-card .nav-label {
    font-size: 9.5px;
    letter-spacing: 0;
  }

  /* Game Cards 2 columns */
  .games-row-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .game-thumb-box-img {
    height: 90px;
  }

  .game-name-label {
    padding: 6px 4px;
    font-size: 11px;
  }

  /* Hero Banner */
  .hero-slider-wrap-img {
    border-radius: 10px;
  }

  .slider-dots {
    bottom: 6px;
  }

  .dot-indicator {
    width: 6px;
    height: 6px;
  }

  /* Notice Bar */
  .notice-ticker-bar {
    padding: 6px 10px;
    font-size: 12px;
  }
}

/* ================= 400PX BREAKPOINT (SMALL PHONES: iPhone SE, etc.) ================= */
@media (max-width: 400px) {
  .btn-agent {
    display: none !important;
  }

  .logo-van88-img {
    height: 28px;
  }

  .hamburger-btn {
    font-size: 20px;
    margin-right: 6px;
  }

  .top-right-actions {
    gap: 4px;
  }

  .btn-reg-top, .btn-login-top {
    padding: 4px 8px;
    font-size: 10.5px;
  }

  .lobby-nav-grid {
    grid-template-columns: repeat(3, 1fr) !important;
  }
}

/* ================= MOBILE SIDEBAR BACKDROP ================= */
.sidebar-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(3px);
  z-index: 1040;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.sidebar-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}