/* ==========================================================================
   ZUHRIS PHOTOGRAPHY LAB — RESPONSIVE & MOBILE STYLESHEET
   Comprehensive Mobile & Tablet UI/UX Overhaul
   ========================================================================== */

/* Tablet & Smaller Desktops (max-width: 1024px) */
@media (min-width: 1025px) and (max-width: 1280px) {
  .nav-container {
    padding: 0 1rem;
    gap: 0.5rem;
  }
  .nav-links {
    gap: 0.2rem;
  }
  .nav-link {
    padding: 0.38rem 0.55rem;
    font-size: 0.8rem;
    gap: 0.25rem;
  }
  .btn-nav-cta {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
  }
  .student-session-btn {
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
  }
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .hero-tag {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .dashboard-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .challenges-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    width: 100%;
    box-sizing: border-box;
  }

  .simulator-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .triangle-layout {
    grid-template-columns: 1fr;
  }

  .materi-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .materi-sidebar {
    position: static;
    margin-bottom: 0;
    width: 100%;
    box-sizing: border-box;
    padding: 1.25rem;
  }

  .materi-nav-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 0.5rem;
    width: 100%;
    box-sizing: border-box;
  }

  .materi-content-card {
    width: 100%;
    max-width: 100%;
    padding: 1.75rem 1.5rem;
    box-sizing: border-box;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

/* Mobile Smartphones (max-width: 768px) */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  body {
    font-size: 15px;
    padding-bottom: 2rem;
    overflow-x: clip !important;
  }

  @supports not (overflow-x: clip) {
    body {
      overflow-x: hidden !important;
    }
  }

  .navbar {
    z-index: 1000 !important;
  }

  .page-view,
  .page-view.active {
    transform: none !important;
  }

  .container {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
  }

  /* Header & Navigation Mobile */
  .nav-container {
    padding: 0 0.75rem;
    gap: 0.5rem;
  }

  .brand {
    gap: 0.45rem;
  }

  .brand-logo-icon {
    width: 32px;
    height: 32px;
  }

  .brand-title {
    font-size: 0.95rem;
    white-space: nowrap;
  }

  .nav-actions {
    gap: 0.35rem;
  }

  /* Compact Circular Student Avatar Button on Mobile Navbar */
  .student-session-nav {
    width: 36px;
    height: 36px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
  }

  #student-nav-name {
    display: none; /* Hide text on mobile top bar to prevent wrapping/collision */
  }

  .student-session-btn .student-icon {
    font-size: 1.1rem;
    display: block;
    line-height: 1;
  }

  .mobile-toggle {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    border-radius: var(--radius-md);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    color: #ffffff;
    font-size: 1.45rem;
    font-weight: 800;
    cursor: pointer;
    line-height: 1;
    transition: all var(--transition-fast);
  }

  .mobile-toggle:hover, .mobile-toggle:active {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--accent-amber);
    color: var(--accent-amber);
  }

  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    height: calc(100vh - var(--header-height));
    background: rgba(10, 12, 16, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    padding: 1.25rem 1rem 2rem;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-medium);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: 999;
    overflow-y: auto;
  }

  .nav-links.mobile-open {
    transform: translateX(0);
  }

  .mobile-only-student-item {
    display: block;
    width: 100%;
    margin-bottom: 0.5rem;
    list-style: none;
  }

  .mobile-student-profile-card .btn-primary-compact,
  .mobile-student-profile-card button {
    width: auto !important;
    flex-shrink: 0 !important;
    padding: 0.4rem 0.8rem !important;
    font-size: 0.8rem !important;
  }

  .nav-link {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.8rem 1rem;
    font-size: 0.92rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: rgba(18, 22, 31, 0.95);
    color: #cbd5e1;
    box-sizing: border-box;
    transition: all var(--transition-fast);
    text-decoration: none;
  }

  .nav-link:hover, .nav-link.active {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--accent-amber);
    color: var(--accent-amber);
  }

  .nav-link-teacher {
    border-color: rgba(6, 182, 212, 0.35) !important;
  }

  .nav-link-teacher.active {
    background: rgba(6, 182, 212, 0.15) !important;
    border-color: var(--accent-cyan) !important;
    color: var(--accent-cyan) !important;
  }

  .btn-nav-cta {
    display: none; /* Keep header clean on mobile */
  }

  /* Hero Section Mobile */
  .hero-section {
    padding: 2.5rem 0 2rem;
  }

  .hero-title {
    font-size: 2.15rem;
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-desc {
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

  .hero-actions .btn-primary, .hero-actions .btn-secondary {
    width: 100%;
    padding: 0.85rem 1.25rem;
    font-size: 0.95rem;
  }

  .hero-camera-card {
    padding: 1.25rem;
  }

  .camera-lens-mock {
    width: 140px;
    height: 140px;
    margin-bottom: 1rem;
  }

  .lens-aperture-center {
    width: 50px;
    height: 50px;
    font-size: 0.7rem;
  }

  /* Dashboard Cards Mobile */
  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .lab-card {
    padding: 1.35rem;
  }

  .diff-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  /* ========================================================================
     CAMERA SIMULATOR MOBILE OVERHAUL: STICKY VIEWFINDER & DIRECT CONTROLS
     ======================================================================== */
  .simulator-layout {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    max-width: 100% !important;
    gap: 0.65rem !important;
    align-items: stretch !important;
    box-sizing: border-box !important;
    position: relative !important;
    overflow: visible !important;
  }

  .simulator-left-col {
    display: contents !important;
  }

  .simulator-right-col {
    display: contents !important;
  }

  /* 1. TOP TOOLBAR: SCENE, LIGHT & MODE SWITCHER */
  .camera-top-toolbar {
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    width: 100% !important;
    max-width: 100% !important;
    gap: 0.5rem !important;
    padding: 0.65rem 0.75rem !important;
    margin-bottom: 0.5rem !important;
    position: relative !important;
    z-index: 300 !important;
    box-sizing: border-box !important;
    overflow: visible !important;
  }

  .scene-select-group {
    width: 100% !important;
    display: flex !important;
    position: relative !important;
    z-index: 310 !important;
    box-sizing: border-box !important;
    overflow: visible !important;
  }

  .toolbar-dropdown-wrapper {
    width: 100% !important;
    position: relative !important;
    z-index: 320 !important;
    box-sizing: border-box !important;
    overflow: visible !important;
  }

  .toolbar-dropdown-trigger {
    width: 100% !important;
    min-height: 44px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding: 0.55rem 0.85rem !important;
    font-size: 0.85rem !important;
    font-weight: 700 !important;
    box-sizing: border-box !important;
    touch-action: manipulation !important;
    cursor: pointer !important;
  }

  .toolbar-dropdown-panel {
    display: none;
    position: relative !important;
    top: auto !important;
    left: auto !important;
    right: auto !important;
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    margin-top: 0.45rem !important;
    max-height: min(55dvh, 380px) !important;
    max-height: min(55vh, 380px);
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    overscroll-behavior: contain !important;
    touch-action: pan-y !important;
    z-index: 350 !important;
    box-sizing: border-box !important;
    background: rgba(15, 23, 42, 0.98) !important;
    border: 1px solid var(--border-medium) !important;
    border-radius: var(--radius-md) !important;
    padding: 0.65rem !important;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.85), 0 0 15px rgba(245, 158, 11, 0.2) !important;
  }

  .toolbar-dropdown-wrapper.open .toolbar-dropdown-panel {
    display: block !important;
    animation: dropdownSlideDown 0.18s cubic-bezier(0.16, 1, 0.3, 1) !important;
  }

  @keyframes dropdownSlideDown {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .dropdown-options-grid {
    display: flex !important;
    flex-direction: column !important;
    gap: 0.4rem !important;
    max-height: none !important;
    overflow: visible !important;
    touch-action: pan-y !important;
    padding-bottom: 0.25rem !important;
  }

  .dropdown-option-btn {
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 0.2rem !important;
    min-height: 48px !important;
    padding: 0.65rem 0.85rem !important;
    touch-action: pan-y !important;
    cursor: pointer !important;
    border-radius: var(--radius-sm) !important;
    background: rgba(255, 255, 255, 0.04) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    box-sizing: border-box !important;
  }

  .dropdown-option-btn:active,
  .dropdown-option-btn:hover {
    background: rgba(245, 158, 11, 0.15) !important;
    border-color: rgba(245, 158, 11, 0.4) !important;
  }

  .dropdown-option-btn.active {
    background: rgba(245, 158, 11, 0.25) !important;
    border-color: var(--accent-amber) !important;
  }

  .mode-switch-group {
    width: 100%;
    display: flex;
    justify-content: space-between;
    box-sizing: border-box;
  }

  .mode-btn {
    flex: 1;
    min-width: 0;
    text-align: center;
    padding: 0.4rem 0;
    font-size: 0.82rem;
  }

  /* 2. LIVE VIEWFINDER & EXPOSURE METER (ORDER 1 - STICKY FLOATING) */
  .viewfinder-wrapper {
    order: 1 !important;
    position: -webkit-sticky !important;
    position: sticky !important;
    top: calc(var(--header-height) + 6px) !important;
    z-index: 100 !important;
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    align-self: stretch !important;
    box-sizing: border-box !important;
    border-radius: var(--radius-md) !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.95), 0 0 0 1px rgba(255, 255, 255, 0.15) !important;
    background: #000000 !important;
    margin: 0 0 0.5rem 0 !important;
    overflow: hidden !important;
  }

  .viewfinder-aspect-box {
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    aspect-ratio: 16 / 9 !important;
    position: relative !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
    background: #000000 !important;
  }

  @supports not (aspect-ratio: 16 / 9) {
    .viewfinder-aspect-box {
      padding-top: 56.25% !important;
    }
  }

  .simulation-canvas {
    position: absolute !important;
    inset: 0 !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    min-width: 100% !important;
    min-height: 100% !important;
    max-width: 100% !important;
    max-height: 100% !important;
    object-fit: cover !important;
    display: block !important;
  }

  .viewfinder-osd {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100% !important;
    height: 100% !important;
    padding: 0.35rem 0.5rem !important;
    font-size: 0.62rem !important;
    box-sizing: border-box !important;
    pointer-events: none !important;
  }

  .osd-top, .osd-bottom {
    pointer-events: auto !important;
  }

  .osd-bottom {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
  }

  .osd-tag {
    padding: 0.15rem 0.35rem !important;
    font-size: 0.65rem !important;
  }

  .osd-tag.highlight {
    cursor: pointer;
  }

  .meter-container {
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    align-self: stretch !important;
    padding: 0.45rem 0.75rem !important;
    margin: 0 !important;
  }

  .meter-header {
    flex-direction: row !important;
    justify-content: space-between !important;
    align-items: center !important;
    gap: 0.25rem !important;
    margin-bottom: 0.25rem !important;
  }

  .meter-title {
    font-size: 0.68rem !important;
  }

  .meter-status-badge {
    font-size: 0.62rem !important;
    padding: 0.12rem 0.4rem !important;
  }

  .meter-scale-wrapper {
    height: 18px !important;
  }

  .meter-needle {
    height: 14px !important;
  }

  /* 3. CAMERA CONTROLS: SLIDERS & SHUTTER (ORDER 2 - DIRECTLY UNDER STICKY VIEWFINDER) */
  .control-panel {
    order: 2 !important;
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    align-self: stretch !important;
    padding: 0.85rem !important;
    gap: 0.75rem !important;
    border-radius: var(--radius-md) !important;
    background: var(--bg-secondary) !important;
    box-shadow: var(--shadow-md) !important;
    margin-bottom: 0.5rem !important;
    position: relative !important;
    z-index: 10 !important;
  }

  /* 4. VISUAL METRIC INDICATOR CARDS (ORDER 3 - STACKED UNDER CONTROLS) */
  .visual-indicators-grid {
    order: 3 !important;
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    gap: 0.5rem !important;
    margin: 0.25rem 0 0.5rem 0 !important;
    position: relative !important;
    z-index: 10 !important;
  }

  .indicator-card {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding: 0.65rem 0.85rem !important;
    background: rgba(18, 22, 31, 0.95) !important;
    border: 1px solid var(--border-subtle) !important;
    border-radius: var(--radius-md) !important;
    margin: 0 !important;
  }

  .indicator-top {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    width: 100% !important;
    margin-bottom: 0.35rem !important;
  }

  .indicator-name {
    font-size: 0.78rem !important;
    font-weight: 700 !important;
    color: var(--text-muted) !important;
    text-transform: uppercase !important;
    white-space: nowrap !important;
  }

  .indicator-readout {
    font-family: var(--font-mono) !important;
    font-size: 0.82rem !important;
    font-weight: 800 !important;
    color: #ffffff !important;
    white-space: nowrap !important;
    text-align: right !important;
  }

  .progress-bar-track {
    width: 100% !important;
    height: 7px !important;
    background: rgba(255, 255, 255, 0.1) !important;
    border-radius: 9999px !important;
    margin: 0.25rem 0 !important;
    overflow: hidden !important;
  }

  .indicator-desc {
    font-size: 0.7rem !important;
    color: #94a3b8 !important;
    margin-top: 0.2rem !important;
    white-space: normal !important;
  }

  /* 5. HISTOGRAM REAL-TIME CARD (ORDER 4 - UNDER VISUAL INDICATORS) */
  .histogram-card {
    order: 4 !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding: 0.75rem 0.85rem !important;
    background: rgba(18, 22, 31, 0.95) !important;
    border: 1px solid var(--border-subtle) !important;
    border-radius: var(--radius-md) !important;
    margin: 0 0 0.5rem 0 !important;
    position: relative !important;
    z-index: 10 !important;
  }

  .histogram-header {
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 0.15rem !important;
    margin-bottom: 0.4rem !important;
  }

  .histogram-title {
    font-size: 0.75rem !important;
    font-weight: 800 !important;
    color: #ffffff !important;
    line-height: 1.2 !important;
  }

  .histogram-subtitle {
    font-size: 0.68rem !important;
    color: #94a3b8 !important;
  }

  .histogram-canvas {
    width: 100% !important;
    height: 65px !important;
    display: block !important;
    background: #000000 !important;
    border-radius: 4px !important;
  }

  .histogram-legend {
    display: flex !important;
    justify-content: space-between !important;
    font-size: 0.65rem !important;
    gap: 0.25rem !important;
    margin-top: 0.35rem !important;
  }

  /* 6. PHOTO ROLL GALLERY (ORDER 6) */
  .photo-roll {
    order: 6 !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  /* Photo Roll Mobile: Smooth Horizontal Swipe */
  .roll-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .roll-grid {
    display: flex !important;
    overflow-x: auto !important;
    scroll-snap-type: x mandatory !important;
    -webkit-overflow-scrolling: touch !important;
    gap: 0.75rem !important;
    padding: 0.25rem 0.25rem 0.75rem 0.25rem !important;
    scrollbar-width: thin !important;
  }

  .photo-card {
    flex: 0 0 160px !important;
    scroll-snap-align: start !important;
    box-sizing: border-box !important;
  }

  /* Triangle & Light Flow Mobile */
  .triangle-container {
    padding: 1rem;
  }

  .light-flow-box {
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
  }

  .flow-arrow {
    display: none;
  }

  /* Section Header Mobile */
  .section-header {
    text-align: center !important;
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 auto 1.5rem !important;
    padding: 0 !important;
    box-sizing: border-box !important;
  }

  .section-tag {
    font-size: 0.75rem !important;
    margin-bottom: 0.35rem !important;
    display: inline-block !important;
  }

  .section-title {
    font-size: 1.65rem !important;
    line-height: 1.25 !important;
    margin-bottom: 0.45rem !important;
    word-break: break-word !important;
  }

  .section-desc {
    font-size: 0.88rem !important;
    line-height: 1.5 !important;
    max-width: 100% !important;
    margin: 0 auto !important;
    box-sizing: border-box !important;
  }

  /* Comparison Lab Mobile */
  .comparison-section {
    width: 100% !important;
    max-width: 100% !important;
    padding: 1.25rem 1rem !important;
    border-radius: var(--radius-md) !important;
    box-sizing: border-box !important;
    margin: 0 auto !important;
    overflow: hidden !important;
  }

  .comparison-controls-row {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.75rem !important;
    margin-bottom: 1rem !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .compare-preset-btns {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 0.5rem !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .btn-preset {
    width: 100% !important;
    min-height: 38px !important;
    padding: 0.5rem 0.5rem !important;
    font-size: 0.78rem !important;
    text-align: center !important;
    justify-content: center !important;
    box-sizing: border-box !important;
  }

  .split-slider-container {
    aspect-ratio: 4/3 !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  /* Photo Challenges Mobile Overhaul (Centered, Full-Width, 0 Overflow) */
  .challenges-grid {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    max-width: 100% !important;
    padding: 0 !important;
    gap: 1.25rem !important;
    margin: 0 auto !important;
    box-sizing: border-box !important;
    align-items: stretch !important;
  }

  .challenge-card {
    width: 100% !important;
    max-width: 100% !important;
    padding: 1.35rem 1.15rem !important;
    border-radius: var(--radius-md) !important;
    box-sizing: border-box !important;
    margin: 0 auto !important;
    overflow: hidden !important;
    align-self: stretch !important;
  }

  .challenge-badge {
    font-size: 0.78rem !important;
    line-height: 1.4 !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
    margin-bottom: 0.35rem !important;
  }

  .challenge-title {
    font-size: 1.25rem !important;
    line-height: 1.3 !important;
    margin-bottom: 0.65rem !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  .challenge-goal {
    padding: 0.75rem 0.85rem !important;
    font-size: 0.85rem !important;
    line-height: 1.45 !important;
    margin: 0.5rem 0 0.85rem !important;
    border-radius: var(--radius-sm) !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
    box-sizing: border-box !important;
    width: 100% !important;
  }

  .challenge-card p {
    font-size: 0.82rem !important;
    line-height: 1.45 !important;
    margin-bottom: 1rem !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  .challenge-score-display {
    padding: 0.55rem 0.85rem !important;
    margin-bottom: 0.85rem !important;
    box-sizing: border-box !important;
    border-radius: var(--radius-sm) !important;
    width: 100% !important;
  }

  .challenge-card .btn-start-challenge {
    width: 100% !important;
    min-height: 46px !important;
    padding: 0.75rem 1rem !important;
    font-size: 0.92rem !important;
    font-weight: 800 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    text-align: center !important;
    border-radius: var(--radius-md) !important;
    box-sizing: border-box !important;
  }

  /* Quiz Mobile Overhaul */
  .quiz-wrapper {
    width: 100% !important;
    max-width: 100% !important;
    padding: 1.25rem 1rem !important;
    border-radius: var(--radius-md) !important;
    box-sizing: border-box !important;
    margin: 0 auto !important;
    overflow: hidden !important;
  }

  .quiz-progress-bar {
    margin-bottom: 1.25rem !important;
    height: 6px !important;
  }

  .quiz-question-header {
    font-size: 0.8rem !important;
    margin-bottom: 0.35rem !important;
  }

  .quiz-question-text {
    font-size: 1.15rem !important;
    line-height: 1.35 !important;
    margin-bottom: 1.25rem !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  .quiz-options-list {
    gap: 0.65rem !important;
    margin-bottom: 1.25rem !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .quiz-option-btn {
    width: 100% !important;
    min-height: 48px !important;
    padding: 0.75rem 0.85rem !important;
    font-size: 0.88rem !important;
    line-height: 1.4 !important;
    border-radius: var(--radius-md) !important;
    box-sizing: border-box !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  .quiz-explanation-box {
    padding: 0.85rem 1rem !important;
    margin-bottom: 1.25rem !important;
    font-size: 0.85rem !important;
    line-height: 1.5 !important;
    box-sizing: border-box !important;
    border-radius: var(--radius-sm) !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  #btn-next-quiz,
  #btn-restart-quiz {
    width: 100% !important;
    min-height: 46px !important;
    justify-content: center !important;
    text-align: center !important;
    padding: 0.75rem 1rem !important;
    font-size: 0.92rem !important;
    box-sizing: border-box !important;
  }

  /* Materi Fotografi Mobile Overhaul (Clean, Centered, Zero Horizontal Overflow) */
  .materi-layout {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    max-width: 100% !important;
    gap: 1.25rem !important;
    margin: 0 auto !important;
    box-sizing: border-box !important;
    align-items: stretch !important;
  }

  .materi-sidebar {
    width: 100% !important;
    max-width: 100% !important;
    padding: 1.15rem 1rem !important;
    border-radius: var(--radius-md) !important;
    box-sizing: border-box !important;
    margin: 0 !important;
    position: static !important;
  }

  .materi-nav-list {
    display: flex !important;
    flex-direction: column !important;
    gap: 0.35rem !important;
    width: 100% !important;
    max-height: 280px !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding-right: 4px !important;
    box-sizing: border-box !important;
  }

  .materi-nav-btn {
    padding: 0.65rem 0.75rem !important;
    font-size: 0.85rem !important;
    min-height: 44px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .materi-content-card {
    width: 100% !important;
    max-width: 100% !important;
    padding: 1.25rem 1rem !important;
    border-radius: var(--radius-md) !important;
    box-sizing: border-box !important;
    margin: 0 !important;
    overflow: hidden !important;
  }

  .materi-title {
    font-size: 1.35rem !important;
    line-height: 1.25 !important;
    margin-bottom: 0.35rem !important;
    word-break: break-word !important;
  }

  .card-subtitle#materi-active-subtitle {
    font-size: 0.9rem !important;
    line-height: 1.4 !important;
  }

  .materi-body {
    font-size: 0.92rem !important;
    line-height: 1.6 !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  .materi-body p {
    margin-bottom: 1rem !important;
  }

  .materi-body h3 {
    font-size: 1.1rem !important;
    margin: 1.25rem 0 0.5rem !important;
    line-height: 1.3 !important;
  }

  .materi-body ul,
  .materi-body ol {
    padding-left: 1.25rem !important;
    margin-bottom: 1rem !important;
  }

  .materi-body li {
    margin-bottom: 0.45rem !important;
    font-size: 0.9rem !important;
    line-height: 1.55 !important;
  }

  .materi-diagram-box {
    padding: 0.85rem 0.75rem !important;
    margin: 1rem 0 !important;
    font-size: 0.85rem !important;
    border-radius: var(--radius-sm) !important;
    box-sizing: border-box !important;
    word-break: break-word !important;
  }

  .materi-diagram-box p {
    margin-bottom: 0.4rem !important;
    line-height: 1.4 !important;
  }

  .materi-footer-row {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.75rem !important;
    margin-top: 1.5rem !important;
    padding-top: 1rem !important;
    text-align: center !important;
    box-sizing: border-box !important;
  }

  .materi-footer-row #materi-sim-link {
    width: 100% !important;
    justify-content: center !important;
    padding: 0.75rem 1rem !important;
    font-size: 0.9rem !important;
    box-sizing: border-box !important;
  }

  .materi-footer-row span,
  .materi-footer-tag {
    font-size: 0.78rem !important;
    color: #64748b !important;
    display: block !important;
  }

  /* Practice Sheet Mobile Overhaul */
  .practice-card, .teacher-card {
    padding: 1.15rem !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .practice-scene-target-grid {
    grid-template-columns: 1fr !important;
    gap: 0.75rem !important;
  }

  .practice-sync-header {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.5rem !important;
  }

  #btn-sync-camera {
    width: 100% !important;
    justify-content: center !important;
    padding: 0.75rem 1rem !important;
  }

  .practice-camera-result-card {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
    padding: 0.85rem !important;
  }

  .practice-submit-container {
    width: 100% !important;
  }

  .practice-submit-btn {
    width: 100% !important;
    justify-content: center !important;
    text-align: center !important;
    padding: 0.85rem 1rem !important;
    font-size: 0.92rem !important;
    white-space: normal !important;
    line-height: 1.3 !important;
    box-sizing: border-box !important;
  }

  /* Teacher Portal Mobile Overhaul */
  .teacher-stats-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 0.65rem !important;
    margin-bottom: 1.25rem !important;
  }

  .teacher-stat-card {
    padding: 0.75rem !important;
  }

  .teacher-stat-val {
    font-size: 1.5rem !important;
  }

  .teacher-stat-label {
    font-size: 0.68rem !important;
  }

  .teacher-toolbar-card {
    position: sticky !important;
    top: var(--header-height) !important;
    z-index: 30 !important;
    background: rgba(18, 22, 31, 0.96) !important;
    backdrop-filter: blur(12px) !important;
    border: 1px solid var(--border-medium) !important;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.6) !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 1rem !important;
    padding: 1rem !important;
    margin-bottom: 1.5rem !important;
  }

  .teacher-filter-group {
    flex-direction: column !important;
    align-items: stretch !important;
    width: 100% !important;
    gap: 0.75rem !important;
  }

  .teacher-filter-item {
    width: 100% !important;
  }

  .teacher-filter-select, .teacher-search-input {
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .teacher-actions-container {
    flex-direction: column !important;
    width: 100% !important;
    gap: 0.5rem !important;
  }

  .teacher-btn-export {
    width: 100% !important;
    justify-content: center !important;
    padding: 0.75rem 1rem !important;
    font-size: 0.9rem !important;
    box-sizing: border-box !important;
  }

  .teacher-sub-actions-group {
    display: flex !important;
    width: 100% !important;
    gap: 0.5rem !important;
  }

  .teacher-btn-sub {
    flex: 1 !important;
    justify-content: center !important;
    padding: 0.65rem 0.35rem !important;
    font-size: 0.76rem !important;
    white-space: nowrap !important;
    box-sizing: border-box !important;
  }

  .teacher-login-card {
    padding: 1.75rem 1.25rem !important;
    margin: 1rem auto !important;
  }

  .teacher-welcome-banner {
    padding: 1.15rem !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 1rem !important;
  }

  .btn-teacher-logout {
    width: 100% !important;
    justify-content: center !important;
  }

  /* Teacher Folder Grid Mobile */
  .teacher-folders-grid {
    grid-template-columns: 1fr !important;
    gap: 0.85rem !important;
  }

  .student-folder-card {
    padding: 1rem !important;
  }

  /* Teacher Portal Header Mobile Optimization (No Overflow, Clean Fit) */
  .teacher-portal-body .nav-container {
    padding: 0 0.75rem !important;
    gap: 0.5rem !important;
  }

  .teacher-portal-body .brand {
    gap: 0.45rem !important;
    flex: 1 !important;
    min-width: 0 !important;
  }

  .teacher-portal-body .brand-title {
    font-size: 0.95rem !important;
    white-space: nowrap !important;
  }

  .teacher-portal-body .brand-badge-tag {
    display: none !important;
  }

  .teacher-portal-body .nav-actions-right {
    flex-shrink: 0 !important;
  }

  .teacher-portal-body .nav-actions-right .btn-primary {
    padding: 0.45rem 0.75rem !important;
    font-size: 0.82rem !important;
    white-space: nowrap !important;
    gap: 0.35rem !important;
  }

  /* Modal Mobile */
  .modal-content {
    padding: 1.25rem;
    max-height: 94vh;
  }

  .modal-actions-row {
    display: flex !important;
    flex-direction: column-reverse !important;
    width: 100% !important;
    gap: 0.5rem !important;
  }

  .modal-actions-row .btn-primary,
  .modal-actions-row .btn-secondary,
  .modal-actions-row button {
    width: 100% !important;
    justify-content: center !important;
    padding: 0.75rem 1rem !important;
    font-size: 0.9rem !important;
    white-space: nowrap !important;
    box-sizing: border-box !important;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}

/* Extra Small Screens (max-width: 400px) */
@media (max-width: 400px) {
  .hero-title {
    font-size: 1.85rem;
  }

  .brand-title {
    font-size: 0.85rem;
  }

  .teacher-portal-body .brand-title {
    font-size: 0.85rem !important;
  }

  .teacher-portal-body .nav-actions-right .btn-primary {
    padding: 0.38rem 0.55rem !important;
    font-size: 0.75rem !important;
  }

  .param-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }
}

/* ==========================================================================
   REAL PHOTO ANALYZER RESPONSIVE ADJUSTMENTS
   ========================================================================== */
@media (max-width: 900px) {
  .real-photo-main-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .real-photo-layout {
    padding: 1rem 0.5rem 2.5rem;
  }

  .photo-dropzone {
    padding: 2.5rem 1rem;
  }
}

@media (max-width: 600px) {
  .camera-profile-card {
    padding: 1rem;
  }

  .camera-card-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .camera-param-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  .camera-param-item {
    padding: 0.75rem 0.65rem;
  }

  .camera-param-item .param-value {
    font-size: 1.15rem;
  }

  .camera-brand-logo-wrap {
    width: 60px;
    height: 38px;
    padding: 4px 6px;
  }

  .camera-model-name {
    font-size: 1.05rem;
  }

  .real-photo-history-grid {
    grid-template-columns: 1fr;
  }
}