/* ==========================================================================
   SkillRock Dedicated Mobile Experience Stylesheet (mobile.css)
   Clean, ergonomic UI & UX specifically tailored for smartphones (<= 768px)
   Does NOT alter the laptop / desktop layout.
   ========================================================================== */

@media (max-width: 768px) {

  /* --------------------------------------------------------------------------
     0. PWA SMART INSTALL BANNER (MOBILE APP EXPERIENCE)
     -------------------------------------------------------------------------- */
  .pwa-install-banner {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding: 10px 14px !important;
    background: var(--bg-card, #1E293B) !important;
    border-bottom: 1px solid var(--border-color, rgba(255, 255, 255, 0.1)) !important;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2) !important;
    gap: 10px !important;
    z-index: 9990 !important;
    position: relative !important;
    animation: slideDown 0.25s ease-out !important;
  }

  .pwa-install-left {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    min-width: 0 !important;
  }

  .pwa-install-icon {
    width: 38px !important;
    height: 38px !important;
    border-radius: 9px !important;
    object-fit: cover !important;
    flex-shrink: 0 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3) !important;
  }

  .pwa-install-title {
    font-weight: 800 !important;
    font-size: 0.88rem !important;
    color: var(--text-main, #FFFFFF) !important;
    line-height: 1.2 !important;
  }

  .pwa-install-sub {
    font-size: 0.72rem !important;
    color: var(--text-muted, #94A3B8) !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    max-width: 165px !important;
  }

  .pwa-install-right {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    flex-shrink: 0 !important;
  }

  .pwa-install-btn {
    font-size: 0.78rem !important;
    padding: 7px 14px !important;
    border-radius: 8px !important;
    font-weight: 800 !important;
    background: var(--primary-action, #6366F1) !important;
    border-color: var(--primary-action, #6366F1) !important;
    color: #FFFFFF !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 4px !important;
  }

  .pwa-dismiss-btn {
    background: none !important;
    border: none !important;
    color: var(--text-muted, #94A3B8) !important;
    font-size: 1.3rem !important;
    line-height: 1 !important;
    padding: 4px !important;
    cursor: pointer !important;
  }


  /* --------------------------------------------------------------------------
     1. GLOBAL TOUCH & CONTAINER NORMALIZATION
     -------------------------------------------------------------------------- */
  html, body {
    overflow-x: hidden !important;
    width: 100% !important;
    max-width: 100vw !important;
    -webkit-tap-highlight-color: transparent;
  }

  /* Prevent auto-zooming on form fields on iOS / Android */
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="search"],
  input[type="number"],
  input[type="url"],
  select,
  textarea {
    font-size: 16px !important;
  }

  /* Compact Fluid Container Padding */
  .container {
    padding-left: 12px !important;
    padding-right: 12px !important;
    width: 100% !important;
    max-width: 100vw !important;
    box-sizing: border-box !important;
  }

  /* Cards Mobile Padding & Radius (Eliminate desktop padding waste) */
  .card {
    padding: 16px !important;
    margin-bottom: 14px !important;
    border-radius: 12px !important;
    box-sizing: border-box !important;
  }

  /* Force all desktop multi-column grids to stack cleanly on mobile */
  .grid-2,
  .grid-3,
  .grid-4,
  .course-grid,
  .admin-metrics-grid,
  .admin-telemetry-grid,
  .admin-two-col-grid,
  .course-layout-grid {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 14px !important;
    width: 100% !important;
  }

  /* --------------------------------------------------------------------------
     2. NAVBAR & TOP HEADER (COMPACT & UNCLUTTERED)
     -------------------------------------------------------------------------- */
  .navbar-pw {
    height: 56px !important;
  }

  .navbar-pw-content {
    padding: 0 10px !important;
    gap: 8px !important;
    height: 100% !important;
  }

  .pw-brand-img {
    width: 28px !important;
    height: 28px !important;
    border-radius: 6px !important;
  }

  .pw-brand-text {
    font-size: 1.05rem !important;
    letter-spacing: -0.01em;
  }

  .pw-mobile-toggle-btn {
    display: inline-flex !important;
    padding: 6px 8px !important;
    border-radius: 8px !important;
  }

  .pw-nav-right {
    gap: 8px !important;
    align-items: center !important;
  }

  /* Compact XP Badge (fits neatly beside logo without squishing) */
  .pw-xp-badge {
    padding: 4px 8px !important;
    font-size: 0.74rem !important;
    gap: 3px !important;
    max-width: 95px !important;
    white-space: nowrap !important;
  }

  .pw-xp-badge i,
  .pw-xp-badge svg {
    width: 12px !important;
    height: 12px !important;
  }

  .pw-user-greeting {
    display: none !important;
  }

  .pw-avatar-trigger {
    padding: 2px !important;
  }

  .pw-avatar-img {
    width: 32px !important;
    height: 32px !important;
  }

  .pw-chevron-icon {
    display: none !important;
  }

  /* Mobile Profile Dropdown (Full width sheet style) */
  .pw-dropdown-menu {
    width: calc(100vw - 20px) !important;
    right: -6px !important;
    top: 52px !important;
    border-radius: 14px !important;
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45) !important;
  }

  /* --------------------------------------------------------------------------
     3. MAIN WRAPPER & MOBILE BOTTOM NAVIGATION CLEARANCE
     -------------------------------------------------------------------------- */
  .main-wrapper-pw,
  .main-wrapper-pw.with-sidebar {
    margin-left: 0 !important;
    padding: 12px 10px 88px 10px !important;
    width: 100% !important;
    max-width: 100vw !important;
    box-sizing: border-box !important;
  }

  /* Mobile Bottom App Navigation Bar */
  .mobile-bottom-nav {
    display: flex !important;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    height: 60px !important;
    background: var(--nav-bg, #0F172A) !important;
    backdrop-filter: blur(16px) !important;
    -webkit-backdrop-filter: blur(16px) !important;
    border-top: 1px solid var(--border-color, rgba(255, 255, 255, 0.08)) !important;
    z-index: 9999 !important;
    box-shadow: 0 -3px 16px rgba(0, 0, 0, 0.25) !important;
    padding-bottom: env(safe-area-inset-bottom, 0px) !important;
  }

  .mobile-bottom-item {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    text-decoration: none !important;
    color: var(--text-muted, #94A3B8) !important;
    font-size: 0.65rem !important;
    font-weight: 600 !important;
    gap: 3px !important;
    flex: 1 !important;
    height: 100% !important;
    position: relative !important;
    -webkit-tap-highlight-color: transparent !important;
  }

  .mobile-bottom-item i,
  .mobile-bottom-item svg {
    width: 20px !important;
    height: 20px !important;
  }

  .mobile-bottom-item.active {
    color: var(--primary-action, #6366F1) !important;
    font-weight: 700 !important;
  }

  .mobile-bottom-item.active svg {
    stroke: var(--primary-action, #6366F1) !important;
  }

  .footer,
  .footer.with-sidebar {
    margin-left: 0 !important;
    padding-bottom: 76px !important;
  }

  /* --------------------------------------------------------------------------
     4. COURSE DETAIL & LECTURE PAGE (Image 1 Mobile Fixes)
     -------------------------------------------------------------------------- */
    /* Mobile Primary Action Card (Positioned right below video progress bar) */
  .mobile-course-action-card {
    display: block !important;
    padding: 16px 14px !important;
    margin-bottom: 20px !important;
    border-radius: 14px !important;
    background: var(--bg-card) !important;
    border: 1.5px solid var(--primary-action) !important;
    box-shadow: 0 4px 18px rgba(99, 102, 241, 0.15) !important;
  }

  .mobile-course-action-card .btn {
    width: 100% !important;
    text-align: center !important;
    justify-content: center !important;
  }

  /* Compact Collapsible "About This Course" on Mobile */
  .course-about-container {
    max-height: 84px !important;
    overflow: hidden !important;
    position: relative !important;
    transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1) !important;
  }

  .course-about-container::after {
    content: '' !important;
    position: absolute !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 38px !important;
    background: linear-gradient(transparent, var(--bg-card)) !important;
    pointer-events: none !important;
  }

  .course-about-container.expanded {
    max-height: 2000px !important;
  }

  .course-about-container.expanded::after {
    display: none !important;
  }

  .btn-toggle-about-mobile {
    display: inline-flex !important;
    align-items: center !important;
    gap: 4px !important;
    background: none !important;
    border: none !important;
    color: var(--primary-action) !important;
    font-size: 0.84rem !important;
    font-weight: 700 !important;
    cursor: pointer !important;
    padding: 4px 0 !important;
    margin-bottom: 16px !important;
  }

  .course-detail-container {
    padding-bottom: 24px !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  /* Compact Header & Filter Badges */
  .learning-compact-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
    margin-bottom: 14px !important;
    padding-bottom: 12px !important;
  }

  .learning-compact-header > div {
    width: 100% !important;
    justify-content: space-between !important;
  }

  /* Video Player Container */
  #ytPlayerContainer {
    border-radius: 10px !important;
  }

  /* Watch Progress Card */
  #playerWatchTimeDisplay {
    font-size: 0.78rem !important;
    margin-top: 3px !important;
  }

  #mainWatchPercentBadge {
    font-size: 0.8rem !important;
    padding: 4px 10px !important;
  }

  #certificationGateBadge {
    font-size: 0.76rem !important;
    margin-top: 4px !important;
  }

  /* Course About & Objectives */
  .course-detail-container h1 {
    font-size: 1.25rem !important;
    line-height: 1.35 !important;
  }

  /* Milestones Section */
  .milestone-card {
    padding: 14px !important;
    border-radius: 12px !important;
  }

  .milestone-card .btn {
    width: 100% !important;
    text-align: center !important;
    justify-content: center !important;
    padding: 10px 14px !important;
    margin-top: 8px !important;
  }

  .course-layout-grid > div:last-child > .card {
    position: static !important;
    margin-top: 14px !important;
  }

  /* --------------------------------------------------------------------------
     5. SKILLBOT AI ASSISTANT (Image 2 Mobile Fixes)
     -------------------------------------------------------------------------- */
  .chatgpt-wrapper {
    height: calc(100dvh - 138px) !important;
    min-height: 480px !important;
    border-radius: 14px !important;
    margin-bottom: 74px !important;
    border: 1px solid var(--border-color) !important;
  }

  .chatgpt-topbar {
    padding: 10px 14px !important;
  }

  .chatgpt-bot-name {
    font-size: 0.95rem !important;
  }

  .chatgpt-model-badge {
    font-size: 0.68rem !important;
    padding: 1px 6px !important;
  }

  .chatgpt-status {
    font-size: 0.72rem !important;
    max-width: 200px !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .btn-new-chat {
    padding: 5px 10px !important;
    font-size: 0.75rem !important;
    border-radius: 8px !important;
  }

  .chatgpt-stream {
    padding: 16px 12px !important;
    gap: 14px !important;
  }

  .chatgpt-hero-icon {
    width: 44px !important;
    height: 44px !important;
    font-size: 1.4rem !important;
    border-radius: 12px !important;
    margin-bottom: 10px !important;
  }

  .chatgpt-empty-state h2 {
    font-size: 1.22rem !important;
    margin-bottom: 6px !important;
  }

  .chatgpt-empty-state p {
    font-size: 0.84rem !important;
    line-height: 1.45 !important;
    padding: 0 8px !important;
  }

  .chatgpt-suggestions-grid {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 8px !important;
    margin-top: 16px !important;
  }

  .chatgpt-suggestion-card {
    padding: 10px 12px !important;
    border-radius: 10px !important;
    font-size: 0.82rem !important;
  }

  .chatgpt-input-container {
    padding: 8px 12px !important;
  }

  .chatgpt-input-box {
    padding: 6px 10px 6px 14px !important;
    border-radius: 18px !important;
  }

  .chatgpt-textarea {
    font-size: 0.88rem !important;
    min-height: 22px !important;
    max-height: 90px !important;
  }

  .chatgpt-send-btn {
    width: 32px !important;
    height: 32px !important;
  }

  .chatgpt-disclaimer {
    display: none !important;
  }

  /* --------------------------------------------------------------------------
     6. ADMIN CONSOLE & DASHBOARD (Image 3 Mobile Fixes)
     -------------------------------------------------------------------------- */
  .admin-sidebar {
    transform: translateX(-100%) !important;
    z-index: 1000 !important;
    width: 260px !important;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
  }

  .admin-sidebar.open {
    transform: translateX(0) !important;
  }

  .admin-main {
    margin-left: 0 !important;
    width: 100% !important;
    max-width: 100vw !important;
    overflow-x: hidden !important;
  }

  .admin-topbar {
    padding: 0 12px !important;
    height: 54px !important;
  }

  .admin-mobile-toggle {
    display: block !important;
  }

  .admin-breadcrumb {
    font-size: 0.78rem !important;
    max-width: 160px !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
  }

  .admin-telemetry-badge {
    display: none !important;
  }

  .admin-view-app-btn {
    padding: 4px 10px !important;
    font-size: 0.75rem !important;
  }

  .admin-content {
    padding: 12px !important;
    width: 100% !important;
    max-width: 100vw !important;
  }

  /* Admin KPI Metric Cards (Single full-width column, huge readable typography) */
  .admin-metrics-grid {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 12px !important;
  }

  .admin-metric-card {
    padding: 16px !important;
    border-radius: 12px !important;
    width: 100% !important;
  }

  .admin-metric-val {
    font-size: 1.7rem !important;
  }

  /* Admin System Telemetry Grid */
  .admin-telemetry-grid {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
  }

  /* Admin 2-Column Sections (Stack on Mobile) */
  .admin-two-col-grid {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 16px !important;
  }

  /* Admin Table Wrappers with Smooth Touch Scrolling */
  .admin-table-wrapper {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    width: 100% !important;
    margin-bottom: 12px !important;
  }

  .admin-table th,
  .admin-table td {
    padding: 10px 12px !important;
    font-size: 0.8rem !important;
    white-space: nowrap !important;
  }

  .admin-card-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
  }

  .admin-card-header > div {
    width: 100% !important;
    justify-content: flex-start !important;
  }

    /* --------------------------------------------------------------------------
     7. OFFICIAL CERTIFICATE PRESENTATION (AUTHENTIC DIPLOMA SCALER)
     Preserves 100% of the authentic laptop layout, typography, borders & seals.
     -------------------------------------------------------------------------- */
  .cert-wrapper {
    padding: 0 4px !important;
    margin: 8px auto 30px auto !important;
    width: 100% !important;
    max-width: 100vw !important;
    box-sizing: border-box !important;
  }

  .cert-viewport {
    width: 100% !important;
    overflow: hidden !important;
    display: flex !important;
    justify-content: center !important;
    position: relative !important;
    margin: 0 auto 16px auto !important;
  }

  .cert-scaler {
    width: 960px !important;
    flex-shrink: 0 !important;
    transform-origin: top center !important;
  }

  .cert-frame {
    width: 960px !important;
    max-width: 960px !important;
    box-sizing: border-box !important;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15) !important;
  }

  .cert-action-bar {
    padding: 12px !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 10px !important;
  }

  .cert-action-bar > div {
    width: 100% !important;
    justify-content: center !important;
  }

  .name-lock-banner {
    padding: 12px 14px !important;
    flex-direction: column !important;
    align-items: stretch !important;
  }

  .name-lock-banner button {
    width: 100% !important;
  }

  /* --------------------------------------------------------------------------
     8. QUIZ ASSESSMENT RUNNER & RESULTS
     -------------------------------------------------------------------------- */
  #quiz-main-grid {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 16px !important;
    width: 100% !important;
  }

  #quiz-main-grid > .card {
    padding: 16px 14px !important;
    border-radius: 12px !important;
  }

  #q-statement {
    font-size: 1.1rem !important;
    line-height: 1.45 !important;
    margin-bottom: 16px !important;
  }

  .quiz-opt-card {
    padding: 12px 14px !important;
    min-height: 48px !important;
    font-size: 0.88rem !important;
    border-radius: 10px !important;
  }

  .quiz-opt-card > div:last-child {
    font-size: 0.88rem !important;
    line-height: 1.4 !important;
  }

  #quiz-palette-grid {
    grid-template-columns: repeat(5, 1fr) !important;
    gap: 6px !important;
  }

  .palette-btn {
    font-size: 0.78rem !important;
    min-height: 36px !important;
    border-radius: 6px !important;
  }

  /* Clear / Prev / Next buttons bar in quiz runner */
  #quiz-main-grid .card > div[style*="justify-content: space-between"] {
    flex-direction: column-reverse !important;
    gap: 10px !important;
    align-items: stretch !important;
  }

  #btn-clear-answer {
    width: 100% !important;
    justify-content: center !important;
    padding: 8px 12px !important;
  }

  #btn-prev-q,
  #btn-next-q {
    flex: 1 !important;
    text-align: center !important;
    justify-content: center !important;
    padding: 10px 14px !important;
  }

  #submit-confirm-modal .card {
    padding: 20px 16px !important;
    width: 92% !important;
    max-width: 360px !important;
  }

  /* Quiz Results Screen (quiz_result.html) */
  .quiz-result-hero {
    padding: 24px 16px !important;
  }

  /* --------------------------------------------------------------------------
     9. MILESTONE STEPPER & PROJECT SUBMISSION (assignment_detail & submit_project)
     -------------------------------------------------------------------------- */
  .assignment-container,
  .submit-project-container {
    padding: 0 4px 60px 4px !important;
    width: 100% !important;
    max-width: 100vw !important;
    box-sizing: border-box !important;
  }

  .assignment-container h1,
  .submit-project-container h1 {
    font-size: 1.35rem !important;
    line-height: 1.3 !important;
  }

  .assignment-container .card,
  .submit-project-container .card {
    padding: 16px 14px !important;
    border-radius: 12px !important;
  }

  /* Responsive Tables inside Assignments */
  .assignment-container table,
  .submit-project-container table {
    font-size: 0.8rem !important;
  }

  .assignment-container th,
  .assignment-container td,
  .submit-project-container th,
  .submit-project-container td {
    padding: 8px 10px !important;
    white-space: normal !important;
  }

  /* Action Bar Buttons Stack on Mobile */
  .assignment-container > div:last-child {
    flex-direction: column !important;
    gap: 10px !important;
    align-items: stretch !important;
  }

  .assignment-container > div:last-child .btn {
    width: 100% !important;
    text-align: center !important;
    justify-content: center !important;
  }

  /* Code Workspace Editor for Algorithmic Assignments */
  #codeSnippet {
    font-size: 13px !important;
    line-height: 1.45 !important;
    padding: 12px 10px !important;
    min-height: 240px !important;
    tab-size: 2 !important;
    border-radius: 8px !important;
  }

  /* --------------------------------------------------------------------------
     10. COURSES CATALOG & MY LEARNING (courses.html & my_learning.html)
     -------------------------------------------------------------------------- */
  .learning-hero-card {
    padding: 20px 16px !important;
    border-radius: 14px !important;
    margin-bottom: 16px !important;
  }

  .learning-hero-card h1 {
    font-size: 1.4rem !important;
    line-height: 1.25 !important;
    margin-bottom: 8px !important;
  }

  .learning-hero-card p {
    font-size: 0.86rem !important;
    line-height: 1.5 !important;
    margin-bottom: 14px !important;
  }

  .bubble-filter-scroll {
    gap: 7px !important;
    padding-bottom: 8px !important;
    margin-bottom: 16px !important;
  }

  .bubble-chip {
    padding: 6px 14px !important;
    font-size: 0.8rem !important;
  }

  .course-card-custom {
    border-radius: 14px !important;
    width: 100% !important;
  }

  .course-card-custom img {
    height: 165px !important;
  }

  .personalized-banner {
    padding: 12px 14px !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
  }

  /* --------------------------------------------------------------------------
     11. STUDENT DASHBOARD (dashboard.html)
     -------------------------------------------------------------------------- */
  .lms-dashboard-container {
    padding: 0 4px 60px 4px !important;
    width: 100% !important;
  }

  .lms-welcome-banner {
    padding: 18px 16px !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 16px !important;
    border-radius: 14px !important;
    margin-bottom: 20px !important;
  }

  .lms-welcome-banner h1 {
    font-size: 1.45rem !important;
    margin-bottom: 6px !important;
  }

  .lms-welcome-banner p {
    font-size: 0.88rem !important;
    line-height: 1.5 !important;
    margin-bottom: 14px !important;
  }

  .lms-welcome-banner > div:last-child {
    min-width: 100% !important;
    width: 100% !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 8px !important;
  }

  .lms-welcome-banner .card {
    padding: 12px 8px !important;
  }

  /* --------------------------------------------------------------------------
     12. CERTIFICATE VERIFICATION & SCANNER (verify_certificate.html)
     -------------------------------------------------------------------------- */
  .verify-container {
    padding: 0 4px !important;
    margin: 16px auto 40px auto !important;
    width: 100% !important;
  }

  .verify-card {
    padding: 20px 14px !important;
    border-radius: 12px !important;
  }

  .verify-card h1 {
    font-size: 1.35rem !important;
  }

  .spec-table {
    padding: 14px 12px !important;
    margin-bottom: 16px !important;
  }

  .spec-row {
    grid-template-columns: 1fr !important;
    gap: 3px !important;
    padding: 8px 0 !important;
  }

  .spec-row > div:first-child {
    font-size: 0.78rem !important;
    color: var(--text-muted) !important;
  }

  .spec-row > div:last-child {
    font-size: 0.88rem !important;
    word-break: break-all !important;
  }

  /* --------------------------------------------------------------------------
     13. ADMIN SUBMISSION EVALUATION (submission_review.html)
     -------------------------------------------------------------------------- */
  .admin-review-grid {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
  }

  .admin-review-actions {
    display: flex !important;
    flex-direction: column !important;
    gap: 8px !important;
    width: 100% !important;
  }

  .admin-review-actions .admin-btn {
    width: 100% !important;
    text-align: center !important;
    justify-content: center !important;
  }

  /* Admin Form Rows Stacking */
  .admin-card div[style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 12px !important;
  }

  .admin-card form > div:last-child {
    flex-direction: column !important;
    gap: 8px !important;
    width: 100% !important;
  }

  .admin-card form > div:last-child .admin-btn {
    width: 100% !important;
    text-align: center !important;
    justify-content: center !important;
  }

  /* --------------------------------------------------------------------------
     14. PEER CHAT & MESSAGING (chat.html)
     -------------------------------------------------------------------------- */
  .chat-layout {
    height: calc(100dvh - 142px) !important;
    min-height: unset !important;
    margin-bottom: 74px !important;
    border-radius: 12px !important;
  }

  /* --------------------------------------------------------------------------
     15. DISCOVER & SKILL SWAP (discover.html & profile.html)
     -------------------------------------------------------------------------- */
  .discover-filter-grid {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
  }

  .discover-filter-grid button,
  .discover-filter-grid a {
    width: 100% !important;
    justify-content: center !important;
  }

  div[style*="grid-template-columns: 2fr 1fr auto"] {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 8px !important;
  }

  div[style*="grid-template-columns: 2fr 1fr auto"] button {
    width: 100% !important;
  }

  /* --------------------------------------------------------------------------
     16. LANDING PAGE HERO & CALL TO ACTION (index.html)
     -------------------------------------------------------------------------- */
  .hero-title {
    font-size: 1.85rem !important;
    line-height: 1.25 !important;
    letter-spacing: -0.5px !important;
  }

  .hero-subtitle {
    font-size: 0.95rem !important;
    line-height: 1.5 !important;
    margin-bottom: 24px !important;
  }

  .hero-cta-wrap {
    flex-direction: column !important;
    gap: 10px !important;
  }

  .hero-cta-wrap .btn {
    width: 100% !important;
    justify-content: center !important;
    padding: 12px 18px !important;
  }

  .stats-strip {
    flex-direction: column !important;
    gap: 8px !important;
    font-size: 0.84rem !important;
    margin-bottom: 36px !important;
  }

  .stats-dot {
    display: none !important;
  }

  /* --------------------------------------------------------------------------
     VIDEO PLAYER MOBILE OPTIMIZATIONS (COMPACT SPEED & EXPAND BUTTON VISIBILITY)
     -------------------------------------------------------------------------- */
  .skillrock-controls-bar {
    padding: 8px 10px !important;
    gap: 6px !important;
  }

  .controls-action-row {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    gap: 4px !important;
  }

  .controls-group-left {
    display: flex !important;
    align-items: center !important;
    gap: 4px !important;
    min-width: 0 !important;
  }

  .controls-group-right {
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    flex-shrink: 0 !important;
  }

  .unskippable-guard-pill {
    display: none !important; /* Hide badge on mobile devices to prevent crowding */
  }

  /* Compact Speed Selector on Mobile so Expand Button is clearly visible */
  .player-speed-select {
    padding: 2px 4px !important;
    font-size: 0.68rem !important;
    height: 26px !important;
    min-width: 36px !important;
    max-width: 46px !important;
    border-radius: 4px !important;
    font-weight: 700 !important;
    flex-shrink: 0 !important;
    border-width: 1px !important;
  }

  /* Expand / Fullscreen Button - High Priority & Visible */
  .btn-player-ctrl#btnPlayerFullscreen {
    display: inline-flex !important;
    flex-shrink: 0 !important;
    padding: 5px !important;
    min-width: 30px !important;
    min-height: 30px !important;
    background: rgba(255, 255, 255, 0.12) !important;
    border-radius: 6px !important;
  }

  .player-time-badge {
    font-size: 0.72rem !important;
    margin-left: 2px !important;
  }

  .unskippable-scrubber-wrapper {
    padding: 6px 0 !important;
  }

  .btn-player-ctrl {
    padding: 5px !important;
    min-width: 30px !important;
    min-height: 30px !important;
  }
}

/* ==========================================================================
   EXTRA-COMPACT SCREENS (<= 480px, e.g. iPhone SE, 360px Android devices)
   ========================================================================== */
@media (max-width: 480px) {
  .container,
  .main-wrapper-pw,
  .main-wrapper-pw.with-sidebar {
    padding-left: 8px !important;
    padding-right: 8px !important;
  }

  .card {
    padding: 14px 12px !important;
  }

  .pw-brand-text {
    font-size: 0.98rem !important;
  }

  .pw-xp-badge {
    padding: 3px 6px !important;
    font-size: 0.7rem !important;
    max-width: 82px !important;
  }

  .course-detail-container h1 {
    font-size: 1.18rem !important;
  }

  .chatgpt-hero-icon {
    width: 38px !important;
    height: 38px !important;
    font-size: 1.2rem !important;
  }

  .chatgpt-empty-state h2 {
    font-size: 1.15rem !important;
  }

  .admin-metric-val {
    font-size: 1.45rem !important;
  }

  

  /* SkillRock Custom Mobile Video Controls Optimization */
  .skillrock-controls-bar {
    padding: 10px 12px 10px 12px !important;
    gap: 8px !important;
  }

  .unskippable-guard-pill {
    display: none !important; /* Hide badge on narrow screens to prevent crowding */
  }

  .player-time-badge {
    font-size: 0.75rem !important;
  }

  .unskippable-scrubber-wrapper {
    padding: 6px 0 !important;
  }

  .btn-player-ctrl {
    padding: 8px !important;
    min-width: 36px !important;
    min-height: 36px !important;
  }
}


/* Fullscreen Landscape Rotation for Mobile Devices */
@media (max-width: 900px) and (orientation: portrait) {
  .skillrock-player-frame:fullscreen,
  .skillrock-player-frame:-webkit-full-screen {
    width: 100vh !important;
    height: 100vw !important;
    transform: rotate(90deg) !important;
    transform-origin: top left !important;
    position: fixed !important;
    top: 0 !important;
    left: 100vw !important;
    max-width: none !important;
    max-height: none !important;
  }
}