/**
 * Thanh Tú Academy LMS - Comprehensive Mobile & Responsive Optimizations
 * Tối ưu hóa toàn diện giao diện di động cho toàn bộ website
 */

/* ==========================================================================
   1. GLOBAL MOBILE MENU BUTTON & ANIMATION
   ========================================================================== */
@media (min-width: 861px) {
  .mobile-menu-button {
    display: none !important;
  }
  .mobile-menu-backdrop {
    display: none !important;
  }
}

@media (max-width: 860px) {
  .site-header__inner {
    gap: 8px !important;
    position: relative;
  }

  .mobile-menu-button {
    display: inline-flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    align-items: center !important;
    gap: 4.5px !important;
    width: 42px !important;
    height: 42px !important;
    padding: 0 !important;
    border-radius: 10px !important;
    border: 1.5px solid #e2e8f0 !important;
    background: #f8fafc !important;
    cursor: pointer !important;
    order: 2 !important;
    margin-left: auto !important;
    flex-shrink: 0 !important;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1) !important;
  }

  .mobile-menu-button span {
    display: block !important;
    width: 20px !important;
    height: 2.2px !important;
    background: #0f172a !important;
    border-radius: 2px !important;
    margin: 0 !important;
    transform-origin: center !important;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease, background-color 0.2s ease !important;
  }

  /* Dark header adaptation (Homepage & dark shells) */
  body.home .mobile-menu-button,
  body.front-page .mobile-menu-button,
  .site-header--dark .mobile-menu-button {
    border-color: rgba(255, 255, 255, 0.18) !important;
    background: rgba(255, 255, 255, 0.08) !important;
  }
  body.home .mobile-menu-button span,
  body.front-page .mobile-menu-button span,
  .site-header--dark .mobile-menu-button span {
    background: #ffffff !important;
  }

  /* Hamburger to 'X' smooth transformation */
  .mobile-menu-button[aria-expanded="true"] {
    background: rgba(2, 132, 199, 0.12) !important;
    border-color: #0284c7 !important;
  }
  .mobile-menu-button[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6.7px) rotate(45deg) !important;
    background: #0284c7 !important;
  }
  .mobile-menu-button[aria-expanded="true"] span:nth-child(2) {
    opacity: 0 !important;
    transform: scaleX(0) !important;
  }
  .mobile-menu-button[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6.7px) rotate(-45deg) !important;
    background: #0284c7 !important;
  }

  /* Backdrop Overlay */
  .mobile-menu-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    top: var(--tu-header, 60px);
    z-index: 175;
    background: rgba(10, 15, 29, 0.65);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity 0.25s ease;
  }
  .mobile-menu-backdrop.is-open {
    display: block;
    opacity: 1;
  }

  body.mobile-nav-active {
    overflow: hidden !important;
  }

  /* ==========================================================================
     2. MOBILE MENU DRAWER (SITE-NAV)
     ========================================================================== */
  .site-nav {
    display: none !important;
    position: fixed !important;
    top: var(--tu-header, 60px) !important;
    left: 0 !important;
    right: 0 !important;
    max-height: calc(100vh - var(--tu-header, 60px)) !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    z-index: 180 !important;
    background: #080d1a !important;
    border-bottom: 1.5px solid rgba(56, 189, 248, 0.25) !important;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8) !important;
    padding: 18px 16px 36px !important;
    margin: 0 !important;
  }
  .site-nav.is-open {
    display: block !important;
    animation: mobileNavSlideDown 0.28s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }
  @keyframes mobileNavSlideDown {
    from {
      opacity: 0;
      transform: translateY(-12px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .site-nav__list {
    display: flex !important;
    flex-direction: column !important;
    gap: 7px !important;
    padding: 0 !important;
    margin: 0 !important;
    list-style: none !important;
  }
  .site-nav__list li {
    width: 100% !important;
    margin: 0 !important;
    position: relative !important;
  }
  .site-nav__list a {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    gap: 10px !important;
    min-height: 48px !important;
    padding: 12px 16px !important;
    border-radius: 12px !important;
    color: #f1f5f9 !important;
    font-size: 15px !important;
    font-weight: 500 !important;
    background: rgba(255, 255, 255, 0.04) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    text-decoration: none !important;
    transition: all 0.18s ease !important;
  }
  .site-nav__list a:hover,
  .site-nav__list a:active {
    background: rgba(2, 132, 199, 0.16) !important;
    border-color: rgba(56, 189, 248, 0.35) !important;
    color: #38bdf8 !important;
  }
  .site-nav__list .current-menu-item > a {
    background: rgba(2, 132, 199, 0.22) !important;
    border-color: #0284c7 !important;
    color: #38bdf8 !important;
    font-weight: 600 !important;
  }

  /* Submenu toggles */
  .site-nav .site-nav__toggle {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 48px !important;
    height: 48px !important;
    position: absolute !important;
    right: 0 !important;
    top: 0 !important;
    background: transparent !important;
    border: 0 !important;
    cursor: pointer !important;
    z-index: 2 !important;
  }
  .site-nav .site-nav__toggle::after {
    content: "" !important;
    display: inline-block !important;
    width: 8px !important;
    height: 8px !important;
    border-right: 2px solid rgba(255, 255, 255, 0.7) !important;
    border-bottom: 2px solid rgba(255, 255, 255, 0.7) !important;
    transform: rotate(45deg) !important;
    transition: transform 0.2s ease !important;
  }
  .site-nav .site-nav__item--has-children.is-open .site-nav__toggle::after {
    transform: rotate(-135deg) !important;
    border-color: #38bdf8 !important;
  }
  .site-nav .mega-dropdown,
  .site-nav .site-nav__dropdown {
    display: none;
    background: rgba(15, 23, 42, 0.8) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    border-radius: 12px !important;
    margin-top: 6px !important;
    padding: 10px !important;
  }
  .site-nav .site-nav__item--has-children.is-open .mega-dropdown,
  .site-nav .site-nav__item--has-children.is-open .site-nav__dropdown {
    display: block !important;
  }

  /* Mobile Nav Footer Actions */
  .mobile-nav-footer {
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
    margin-top: 20px !important;
    padding-top: 18px !important;
    border-top: 1px dashed rgba(255, 255, 255, 0.12) !important;
  }
  .mobile-nav-zalo {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    min-height: 48px !important;
    padding: 10px 16px !important;
    border-radius: 12px !important;
    background: linear-gradient(135deg, #0068ff 0%, #0052cc 100%) !important;
    color: #ffffff !important;
    font-size: 14.5px !important;
    font-weight: 600 !important;
    text-decoration: none !important;
    box-shadow: 0 4px 16px rgba(0, 104, 255, 0.4) !important;
  }
  .mobile-nav-community {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    min-height: 44px !important;
    padding: 10px 16px !important;
    border-radius: 12px !important;
    background: rgba(255, 255, 255, 0.06) !important;
    border: 1px solid rgba(255, 255, 255, 0.14) !important;
    color: #38bdf8 !important;
    font-size: 13.5px !important;
    font-weight: 500 !important;
    text-decoration: none !important;
  }
  .mobile-nav-login {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    min-height: 44px !important;
    padding: 10px 16px !important;
    border-radius: 12px !important;
    background: #ffffff !important;
    color: #0f172a !important;
    font-size: 13.5px !important;
    font-weight: 600 !important;
    text-decoration: none !important;
  }
}

/* ==========================================================================
   3. RESPONSIVE OPTIMIZATIONS ACROSS PAGES
   ========================================================================== */

/* Products Catalog Page (/san-pham/) */
@media (max-width: 768px) {
  .tulms-prod-hero {
    padding: 32px 0 24px !important;
  }
  .tulms-filter-tabs {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding-bottom: 10px !important;
    gap: 8px !important;
    scrollbar-width: none;
  }
  .tulms-filter-tabs::-webkit-scrollbar {
    display: none;
  }
  .tulms-tab-btn {
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    padding: 8px 16px !important;
    font-size: 13px !important;
    border-radius: 999px !important;
  }
  .tulms-prod-grid {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }
  .tulms-prod-card__actions {
    display: flex !important;
    flex-direction: column !important;
    gap: 8px !important;
  }
  .tulms-btn-detail,
  .tulms-btn-buy,
  .tulms-btn-zalo {
    width: 100% !important;
    min-height: 44px !important;
    justify-content: center !important;
    text-align: center !important;
    border-radius: 10px !important;
  }
}

/* Single Product Detail Page (/product/*) */
@media (max-width: 768px) {
  .tulms-single-product-grid {
    grid-template-columns: 1fr !important;
    gap: 28px !important;
  }
  .tulms-single-actions {
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
  }
  .tulms-single-actions .tulms-btn-buy,
  .tulms-single-actions .tulms-btn-zalo {
    width: 100% !important;
    min-height: 50px !important;
    font-size: 15px !important;
  }
  .tulms-single-pricing {
    flex-wrap: wrap !important;
    gap: 12px !important;
  }
  .tulms-steps-grid {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }
}

/* Checkout Page (/checkout/) */
@media (max-width: 768px) {
  .lms-checkout-page {
    padding: 24px 0 60px !important;
  }
  .lms-checkout-2col {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }
  .lms-checkout-col-aside {
    order: -1 !important;
  }
  .lms-checkout-panel {
    padding: 20px 16px !important;
    border-radius: 14px !important;
  }
  .lms-vietqr-grid {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
    text-align: center !important;
  }
  .lms-vietqr-image-wrap {
    max-width: 200px !important;
    margin: 0 auto !important;
  }
  .lms-bank-info-item .value-with-copy {
    justify-content: space-between !important;
  }
  #place_order {
    font-size: 15px !important;
    min-height: 52px !important;
  }
}

/* Typography & Headings Balance */
@media (max-width: 640px) {
  .split-masthead h1,
  .premium-hero__copy h1,
  .tulms-prod-hero h1 {
    font-size: clamp(26px, 7vw, 34px) !important;
    line-height: 1.25 !important;
  }
  .home-section__heading h2,
  .lms-checkout-panel__title {
    font-size: clamp(18px, 5.5vw, 24px) !important;
  }
}

/* ==========================================================================
   4. BRAND LOGO STYLING (TDACADEMY)
   ========================================================================== */
.brand {
  display: inline-flex !important;
  align-items: center !important;
  text-decoration: none !important;
}
.brand__logo {
  height: auto !important;
  max-height: 44px !important;
  width: auto !important;
  max-width: 175px !important;
  object-fit: contain !important;
  display: block !important;
  transition: opacity 0.2s ease, transform 0.2s ease !important;
}
.brand__logo:hover {
  transform: scale(1.02) !important;
}
.brand__logo--light {
  display: block !important;
}
.brand__logo--dark {
  display: none !important;
}

/* Dark header mode: Homepage & Dark Header */
body.home .site-header .brand__logo--light,
body.front-page .site-header .brand__logo--light,
.site-header--dark .brand__logo--light {
  display: none !important;
}
body.home .site-header .brand__logo--dark,
body.front-page .site-header .brand__logo--dark,
.site-header--dark .brand__logo--dark {
  display: block !important;
}

/* In footer */
.site-footer .brand__logo--light {
  display: none !important;
}
.site-footer .brand__logo--dark {
  display: block !important;
  max-height: 48px !important;
}

@media (max-width: 600px) {
  .brand__logo {
    max-height: 38px !important;
    max-width: 145px !important;
  }

  /* Curriculum lesson thumbnail mobile optimization */
  .curriculum__lesson {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    padding: 8px 10px !important;
  }
  .curriculum__lesson-thumb {
    width: 82px !important;
    min-width: 82px !important;
    max-width: 82px !important;
    aspect-ratio: 16 / 9 !important;
    border-radius: 6px !important;
    flex-shrink: 0 !important;
  }
  .curriculum__lesson-body {
    flex: 1 !important;
    min-width: 0 !important;
  }
  .curriculum__lesson-body .lesson-label {
    font-size: 12.5px !important;
    line-height: 1.35 !important;
  }
  .lesson-thumb__play {
    width: 24px !important;
    height: 24px !important;
  }
  .lesson-thumb__play svg {
    width: 10px !important;
    height: 10px !important;
  }
  .lesson-thumb__duration {
    font-size: 8.5px !important;
    padding: 1px 4px !important;
    right: 3px !important;
    bottom: 3px !important;
  }
}



/* ==========================================================================
   GLOBAL VIEWPORT HARDENING (NO HORIZONTAL OVERFLOW ON ANY MOBILE DEVICE)
   ========================================================================== */
html, body {
  max-width: 100vw !important;
  overflow-x: hidden !important;
}

*, *::before, *::after {
  box-sizing: border-box;
}

img, video, iframe, canvas, svg {
  max-width: 100%;
}