@media(max-width:768px) {
  :root {
    --bs-body-font-size: 1.1rem!important;
    --bs-nav-link-font-size: 1.25rem!important;
  }
  .vh-100 {
    height: calc(100vh - 56px) !important;
  }
  .vh-75 {
    height: calc(75vh - 56px) !important;
  }
  .vh-50 {
    height: calc(50vh - 56px) !important;
  }
  .vh-25 {
    height: calc(25vh - 56px) !important;
  }
}

/* ──────────────────────────────────────────────
   Bottom Sheet – Adaptive Light / Dark
   ────────────────────────────────────────────── */
@media (max-width: 991.98px) {

  /* ── colour tokens (light) ── */
  :root {
    --bs-sheet-bg: rgba(255, 255, 255, 0.88);
    --bs-sheet-bg-solid: #ffffff;
    --bs-sheet-text: #1a1a2e;
    --bs-sheet-text-muted: #64748b;
    --bs-sheet-border: rgba(0, 0, 0, 0.06);
    --bs-sheet-handle: rgba(0, 0, 0, 0.18);
    --bs-sheet-hover: rgba(0, 0, 0, 0.04);
    --bs-sheet-active: rgba(59, 130, 246, 0.08);
    --bs-sheet-accent: #2563eb;
    --bs-sheet-shadow: 0 -8px 40px rgba(0, 0, 0, 0.12);
    --bs-sheet-divider: rgba(0, 0, 0, 0.06);
    --bs-sheet-card-bg: rgba(0, 0, 0, 0.03);
    --bs-sheet-close-bg: rgba(0, 0, 0, 0.06);
    --bs-sheet-close-color: #64748b;
    --bs-sheet-chevron: #94a3b8;
    --bs-sheet-badge-bg: rgba(59, 130, 246, 0.1);
    --bs-sheet-badge-text: #2563eb;
  }

  /* ── colour tokens (dark) ── */
  @media (prefers-color-scheme: dark) {
    :root {
      --bs-sheet-bg: rgba(22, 22, 30, 0.92);
      --bs-sheet-bg-solid: #16161e;
      --bs-sheet-text: #e8e8ed;
      --bs-sheet-text-muted: #8b8b9e;
      --bs-sheet-border: rgba(255, 255, 255, 0.06);
      --bs-sheet-handle: rgba(255, 255, 255, 0.22);
      --bs-sheet-hover: rgba(255, 255, 255, 0.05);
      --bs-sheet-active: rgba(96, 165, 250, 0.12);
      --bs-sheet-accent: #60a5fa;
      --bs-sheet-shadow: 0 -8px 40px rgba(0, 0, 0, 0.5);
      --bs-sheet-divider: rgba(255, 255, 255, 0.06);
      --bs-sheet-card-bg: rgba(255, 255, 255, 0.04);
      --bs-sheet-close-bg: rgba(255, 255, 255, 0.08);
      --bs-sheet-close-color: #8b8b9e;
      --bs-sheet-chevron: #5a5a72;
      --bs-sheet-badge-bg: rgba(96, 165, 250, 0.15);
      --bs-sheet-badge-text: #60a5fa;
    }
  }

  /* Also support Bootstrap dark-mode class */
  html[data-bs-theme="dark"],
  html.dark-mode {
    --bs-sheet-bg: rgba(22, 22, 30, 0.92);
    --bs-sheet-bg-solid: #16161e;
    --bs-sheet-text: #e8e8ed;
    --bs-sheet-text-muted: #8b8b9e;
    --bs-sheet-border: rgba(255, 255, 255, 0.06);
    --bs-sheet-handle: rgba(255, 255, 255, 0.22);
    --bs-sheet-hover: rgba(255, 255, 255, 0.05);
    --bs-sheet-active: rgba(96, 165, 250, 0.12);
    --bs-sheet-accent: #60a5fa;
    --bs-sheet-shadow: 0 -8px 40px rgba(0, 0, 0, 0.5);
    --bs-sheet-divider: rgba(255, 255, 255, 0.06);
    --bs-sheet-card-bg: rgba(255, 255, 255, 0.04);
    --bs-sheet-close-bg: rgba(255, 255, 255, 0.08);
    --bs-sheet-close-color: #8b8b9e;
    --bs-sheet-chevron: #5a5a72;
    --bs-sheet-badge-bg: rgba(96, 165, 250, 0.15);
    --bs-sheet-badge-text: #60a5fa;
  }

  /* ── Bottom Sheet Container ── */
  #offcanvasNavbarDark.offcanvas.offcanvas-bottom {
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    top: auto !important;
    z-index: 1045 !important;
    height: auto !important;
    max-height: 85vh !important;
    min-height: 240px;
    border-top-left-radius: 1.25rem;
    border-top-right-radius: 1.25rem;
    border: none !important;
    background-color: var(--bs-sheet-bg) !important;
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    box-shadow: var(--bs-sheet-shadow);
    color: var(--bs-sheet-text) !important;
    transition: transform 0.38s cubic-bezier(0.32, 0.72, 0, 1) !important;
    overflow: hidden;
  }

  /* Override Bootstrap text-bg-dark to use our sheet colours */
  #offcanvasNavbarDark.offcanvas.offcanvas-bottom.text-bg-dark {
    --bs-dark-rgb: none;
    background-color: var(--bs-sheet-bg) !important;
    color: var(--bs-sheet-text) !important;
  }

  /* Force correct transform states for bottom sheet */
  #offcanvasNavbarDark.offcanvas.offcanvas-bottom {
    transform: translateY(100%) !important;
  }
  #offcanvasNavbarDark.offcanvas.offcanvas-bottom.show:not(.hiding),
  #offcanvasNavbarDark.offcanvas.offcanvas-bottom.showing {
    transform: translateY(0) !important;
  }
  #offcanvasNavbarDark.offcanvas.offcanvas-bottom.hiding {
    transform: translateY(100%) !important;
  }

  /* ── Backdrop ── */
  .offcanvas-backdrop.show {
    opacity: 0.4 !important;
    backdrop-filter: blur(2px);
  }

  /* ── Drag Handle ── */
  #offcanvasNavbarDark .drag-handle {
    width: 36px;
    height: 4px;
    border-radius: 2px;
    background: var(--bs-sheet-handle);
    margin: 0 auto;
    flex-shrink: 0;
  }

  /* ── Header ── */
  #offcanvasNavbarDark .offcanvas-header {
    padding: 12px 20px 10px !important;
    border-bottom: 1px solid var(--bs-sheet-divider) !important;
    position: relative;
  }
  #offcanvasNavbarDark .offcanvas-title {
    font-size: 0.8rem !important;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--bs-sheet-text-muted) !important;
    margin-top: 4px;
  }
  #offcanvasNavbarDark .btn-close,
  #offcanvasNavbarDark .btn-close-white {
    filter: none !important;
    background: var(--bs-sheet-close-bg) !important;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    padding: 0 !important;
    opacity: 1;
    background-image: none !important;
    position: absolute;
    top: 14px;
    right: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  #offcanvasNavbarDark .btn-close::before {
    content: "\00d7";
    font-size: 1.2rem;
    line-height: 1;
    color: var(--bs-sheet-close-color);
    font-weight: 300;
  }

  /* ── Body ── */
  #offcanvasNavbarDark .offcanvas-body {
    padding: 8px 0 !important;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    position: relative;
  }

  /* ── Navigation List Reset ── */
  #offcanvasNavbarDark .navbar-nav {
    flex-direction: column !important;
    margin: 0 !important;
    padding: 0 8px !important;
    gap: 0 !important;
  }
  #offcanvasNavbarDark .navbar-nav .nav-item {
    margin: 0;
    list-style: none;
  }

  /* ── Navigation Links ── */
  #offcanvasNavbarDark .navbar-nav .nav-link {
    display: flex !important;
    align-items: center;
    gap: 12px;
    padding: 12px 16px !important;
    color: var(--bs-sheet-text) !important;
    font-size: 0.95rem !important;
    font-weight: 450;
    border-radius: 12px;
    transition: background 0.2s ease, transform 0.15s ease;
    text-decoration: none;
    position: relative;
    margin: 1px 0;
  }
  #offcanvasNavbarDark .navbar-nav .nav-link:hover,
  #offcanvasNavbarDark .navbar-nav .nav-link:focus {
    background: var(--bs-sheet-hover);
  }
  #offcanvasNavbarDark .navbar-nav .nav-link:active {
    background: var(--bs-sheet-active);
    transform: scale(0.98);
  }
  #offcanvasNavbarDark .navbar-nav .nav-link i.mdi {
    font-size: 1.25rem;
    width: 1.5rem;
    text-align: center;
    color: var(--bs-sheet-text-muted);
    flex-shrink: 0;
  }
  #offcanvasNavbarDark .navbar-nav .nav-link span {
    flex: 1;
  }
  #offcanvasNavbarDark .navbar-nav .nav-item.active > .nav-link {
    background: var(--bs-sheet-active);
    color: var(--bs-sheet-accent) !important;
  }
  #offcanvasNavbarDark .navbar-nav .nav-item.active > .nav-link i.mdi {
    color: var(--bs-sheet-accent);
  }

  /* ── Dropdown toggle chevron (replace caret) ── */
  #offcanvasNavbarDark .navbar-nav .nav-link.dropdown-toggle::after {
    display: none !important;
  }
  #offcanvasNavbarDark .navbar-nav .nav-link[data-bs-submenu]::after {
    content: "\203A";
    font-size: 1.5rem;
    line-height: 1;
    color: var(--bs-sheet-chevron);
    margin-left: auto;
    font-weight: 300;
  }

  /* ── Hide original dropdown-menus (replaced by JS sub-sheets) ── */
  #offcanvasNavbarDark .dropdown-menu {
    display: none !important;
  }

  /* ── Divider ── */
  #offcanvasNavbarDark .navbar-nav + .navbar-nav {
    border-top: 1px solid var(--bs-sheet-divider);
    margin-top: 4px !important;
    padding-top: 4px !important;
  }

  /* ── User Account Card ── */
  #offcanvasNavbarDark .nav-item.user-account > .nav-link {
    background: var(--bs-sheet-card-bg);
  }

  /* ── Sign-in Button ── */
  #offcanvasNavbarDark .user-login .btn {
    width: 100%;
    padding: 0.75rem !important;
    font-size: 0.95rem;
    font-weight: 600;
  }
  
  #offcanvasNavbarDark .user-login.ms-2 {
    margin-left: 0 !important;
  }

  /* ── hr dividers in bottom sheet ── */
  #offcanvasNavbarDark hr.dropdown-divider {
    border-color: var(--bs-sheet-divider);
    margin: 4px 16px;
  }

  /* ── Badge ── */
  #offcanvasNavbarDark .badge.bg-danger {
    font-size: 0.65rem;
    padding: 3px 6px;
    border-radius: 8px;
  }

  /* ── Sub-sheet Panel ── */
  .bottom-sub-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1070;
    max-height: 85vh;
    min-height: 200px;
    border-top-left-radius: 1.25rem;
    border-top-right-radius: 1.25rem;
    background: var(--bs-sheet-bg);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    box-shadow: var(--bs-sheet-shadow);
    color: var(--bs-sheet-text);
    transform: translateY(100%);
    transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }
  .bottom-sub-sheet.show {
    transform: translateY(0);
  }

  /* Sub-sheet header */
  .bottom-sub-sheet .sub-sheet-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px 10px;
    border-bottom: 1px solid var(--bs-sheet-divider);
    flex-shrink: 0;
  }
  .bottom-sub-sheet .sub-sheet-header .drag-handle {
    width: 36px;
    height: 4px;
    border-radius: 2px;
    background: var(--bs-sheet-handle);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 6px;
  }
  .bottom-sub-sheet .sub-sheet-back {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--bs-sheet-close-bg);
    color: var(--bs-sheet-text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.2s ease;
    padding: 0;
    line-height: 1;
  }
  .bottom-sub-sheet .sub-sheet-back:hover {
    background: var(--bs-sheet-hover);
  }
  .bottom-sub-sheet .sub-sheet-title {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--bs-sheet-text-muted);
    flex: 1;
    text-align: center;
    padding-right: 40px;
  }

  /* Sub-sheet body */
  .bottom-sub-sheet .sub-sheet-body {
    padding: 8px 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    flex: 1;
  }
  .bottom-sub-sheet .sub-sheet-body .sub-sheet-list {
    list-style: none;
    margin: 0;
    padding: 0 8px;
  }
  .bottom-sub-sheet .sub-sheet-body .sub-sheet-list li {
    margin: 1px 0;
  }
  .bottom-sub-sheet .sub-sheet-body .sub-sheet-list a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--bs-sheet-text);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 450;
    border-radius: 12px;
    transition: background 0.2s ease, transform 0.15s ease;
  }
  .bottom-sub-sheet .sub-sheet-body .sub-sheet-list a:hover {
    background: var(--bs-sheet-hover);
  }
  .bottom-sub-sheet .sub-sheet-body .sub-sheet-list a:active {
    background: var(--bs-sheet-active);
    transform: scale(0.98);
  }
  .bottom-sub-sheet .sub-sheet-body .sub-sheet-list a i.mdi {
    font-size: 1.25rem;
    width: 1.5rem;
    text-align: center;
    color: var(--bs-sheet-text-muted);
    flex-shrink: 0;
  }
  .bottom-sub-sheet .sub-sheet-body .sub-sheet-list a span {
    flex: 1;
  }
  .bottom-sub-sheet .sub-sheet-body .sub-sheet-list a[data-bs-submenu]::after {
    content: "\203A";
    font-size: 1.5rem;
    line-height: 1;
    color: var(--bs-sheet-chevron);
    font-weight: 300;
  }

  /* Backdrop for sub-sheets */
  .sub-sheet-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1069;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
  }
  .sub-sheet-backdrop.show {
    opacity: 1;
    pointer-events: auto;
  }

  /* ── Prevent body scroll when bottom sheet is open ── */
  body.bottom-sheet-open {
    overflow: hidden;
    touch-action: none;
  }



  /* Override Bootstrap offcanvas for smaller width devices */
  .offcanvas-start,
  .offcanvas-end {
    max-width: 100% !important;
  }
}