/* ============================================
   MEDIA SCREEN QUERIES
   Combined from: landing.css, subject-selection.css,
   lesson-viewer.css, class-view.css
   ============================================ */


/* ============================================
   FROM: landing.css
   ============================================ */

@media (max-width: 767px) {
  .logo-text span {
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  .cta-button {
    padding: 10px 20px;
    font-size: 15px;
    width: fit-content;
    margin: 0 auto;
  }
}

@media (max-width: 640px) {
  .chat-float-container {
    bottom: 20px;
    right: 20px;
  }

  /* Hide orb when chat is open on mobile */
  .chat-window-modern:not(.hidden) ~ .chat-orb-trigger {
    display: none;
  }

  .chat-window-modern {
    width: 100vw;
    height: 100vh;
    max-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: 0;
    border-radius: 0;
    z-index: 10000;
  }

  /* Adjust input area padding on mobile */
  .chat-input-area {
    padding: 16px 20px 20px;
  }

  .send-btn {
    padding: 12px 16px;
  }

  .kimi-orb {
    width: 60px;
    height: 60px;
  }

  .eye {
    width: 8px;
    height: 8px;
  }

  .orb-face {
    gap: 8px;
  }
}

/* Tablet */
@media (min-width: 641px) and (max-width: 1023px) {
  .chat-window-modern {
    width: 380px;
    height: 600px;
  }

  .chat-float-container {
    bottom: 1.5rem;
    right: 1.5rem;
  }
}

/* Desktop Responsive */
@media (max-width: 767px) {
  .hero-landing {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero-stats-landing {
    gap: var(--space-4);
  }

  .stat-card {
    padding: var(--space-3) var(--space-4);
  }

  .stat-icon {
    font-size: 1.5rem;
  }

  .stat-number {
    font-size: var(--text-xl);
  }

  .classes-section,
  .features-section {
    padding: 60px 0;
  }

  .class-grid-landing {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .class-card-landing {
    padding: var(--space-6);
  }

  .class-number {
    font-size: 3rem;
  }

  .features-grid-landing {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

@media (min-width: 768px) and (max-wHiddeidth: 1023px) {
  .class-grid-landing {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}


/* ============================================
   FROM: subject-selection.css
   ============================================ */

@media (max-width: 768px) {
  .logo-text span {
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  .chat-float-container {
    bottom: 20px;
    right: 20px;
  }

  /* Hide orb when chat is open on mobile */
  .chat-window-modern:not(.hidden) ~ .chat-orb-trigger {
    display: none;
  }

  .chat-window-modern {
    width: 100vw;
    height: 100vh;
    max-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: 0;
    border-radius: 0;
    z-index: 10000;
  }

  /* Adjust input area padding on mobile */
  .chat-input-area {
    padding: 16px 20px 20px;
  }

  .send-btn {
    padding: 12px 16px;
  }

  .kimi-orb {
    width: 60px;
    height: 60px;
  }

  .eye {
    width: 8px;
    height: 8px;
  }

  .orb-face {
    gap: 8px;
  }
}

/* Tablet */
@media (min-width: 641px) and (max-width: 1023px) {
  .chat-window-modern {
    width: 380px;
    height: 600px;
  }

  .chat-float-container {
    bottom: 1.5rem;
    right: 1.5rem;
  }
}

/* Desktop Responsive */
@media (max-width: 767px) {
  .hero-landing {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero-stats-landing {
    gap: var(--space-4);
  }

  .stat-card {
    padding: var(--space-3) var(--space-4);
  }

  .stat-icon {
    font-size: 1.5rem;
  }

  .stat-number {
    font-size: var(--text-xl);
  }

  .classes-section,
  .features-section {
    padding: 60px 0;
  }

  .class-grid-landing {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .class-card-landing {
    padding: var(--space-6);
  }

  .class-number {
    font-size: 3rem;
  }

  .features-grid-landing {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

@media (min-width: 768px) and (max-wHiddeidth: 1023px) {
  .class-grid-landing {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* Mobile Responsive */
@media (max-width: 767px) {
  .subject-selection-main {
    padding: var(--space-6) 0 var(--space-12);
  }

  .page-header {
    margin-bottom: var(--space-8);
  }

  .header-icon {
    font-size: 3rem;
  }

  .subjects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .subject-card {
    padding: var(--space-6);
  }

  .subject-icon {
    width: 60px;
    height: 60px;
    font-size: 2rem;
  }

  .subject-name {
    font-size: var(--text-xl);
  }

  .subject-description {
    font-size: var(--text-sm);
  }

  .info-card {
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
  }

  .info-icon {
    font-size: 2.5rem;
  }

  .info-title {
    font-size: var(--text-lg);
  }

  .info-text {
    font-size: var(--text-sm);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .subjects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .subjects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}


/* ============================================
   FROM: lesson-viewer.css
   ============================================ */

/* ============================================
   MOBILE RESPONSIVE (< 768px)
   ============================================ */

@media (max-width: 767px) {
  /* Hide navbar title on mobile */
  .navbar-title {
    display: none;
  }

  /* Hide breadcrumb on mobile */
  .breadcrumb-wrapper {
    display: none;
  }

  /* Remove layout padding */
  .lesson-viewer-layout {
    padding: 0;
  }

  /* Stack layout */
  .lesson-layout {
    flex-direction: column;
    gap: 0;
  }

  /* Sidebar becomes slide-in menu */
  .lesson-sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    width: 85%;
    max-width: 320px;
    height: 100vh;
    z-index: calc(var(--z-sticky) + 2);
    transition: left 0.3s ease-out;
    border-radius: 0;
    max-height: 100vh;
  }

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

  .sidebar-close {
    display: flex; /* Show close button on mobile */
    align-items: center;
    justify-content: center;
  }

  .mobile-only {
    display: block;
  }

  /* Content takes full width */
  .lesson-content-area {
    width: 100%;
  }

  .content-box {
    padding: var(--space-5);
    border-radius: 0;
    box-shadow: none;
    min-height: calc(100vh - var(--navbar-height));
  }

  /* Adjust sidebar content */
  .sidebar-content {
    padding: var(--space-4);
  }

  .lesson-info {
    padding: var(--space-3);
  }

  .lesson-info-title {
    font-size: var(--text-sm);
  }

  .sidebar-tab,
  .sidebar-action-btn,
  .sidebar-nav-btn {
    padding: var(--space-3);
  }
}

/* ============================================
   TABLET (768px - 1023px)
   ============================================ */

@media (min-width: 768px) and (max-width: 1023px) {
  .lesson-sidebar {
    width: 280px;
  }

  .content-box {
    padding: var(--space-8);
  }

  .navbar-title {
    max-width: 300px;
  }
}

/* ============================================
   LARGE DESKTOP (1440px+)
   ============================================ */

@media (min-width: 1440px) {
  .lesson-sidebar {
    width: 360px;
  }

  .navbar-title {
    max-width: 500px;
  }
}

/* ============================================
   TOUCH FEEDBACK
   ============================================ */

@media (hover: none) {
  .sidebar-tab:active,
  .sidebar-action-btn:active,
  .sidebar-nav-btn:active {
    transform: scale(0.98);
  }
}

@media (max-width: 768px) {
  .logo-text span {
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  .chat-float-container {
    bottom: 20px;
    right: 20px;
  }

  /* Hide orb when chat is open on mobile */
  .chat-window-modern:not(.hidden) ~ .chat-orb-trigger {
    display: none;
  }

  .chat-window-modern {
    width: 100vw;
    height: 100vh;
    max-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: 0;
    border-radius: 0;
    z-index: 10000;
  }

  /* Adjust input area padding on mobile */
  .chat-input-area {
    padding: 16px 20px 20px;
  }

  .send-btn {
    padding: 12px 16px;
  }

  .kimi-orb {
    width: 60px;
    height: 60px;
  }

  .eye {
    width: 8px;
    height: 8px;
  }

  .orb-face {
    gap: 8px;
  }
}

/* Tablet */
@media (min-width: 641px) and (max-width: 1023px) {
  .chat-window-modern {
    width: 380px;
    height: 600px;
  }

  .chat-float-container {
    bottom: 1.5rem;
    right: 1.5rem;
  }
}

/* Desktop Responsive */
@media (max-width: 767px) {
  .hero-landing {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero-stats-landing {
    gap: var(--space-4);
  }

  .stat-card {
    padding: var(--space-3) var(--space-4);
  }

  .stat-icon {
    font-size: 1.5rem;
  }

  .stat-number {
    font-size: var(--text-xl);
  }

  .classes-section,
  .features-section {
    padding: 60px 0;
  }

  .class-grid-landing {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .class-card-landing {
    padding: var(--space-6);
  }

  .class-number {
    font-size: 3rem;
  }

  .features-grid-landing {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

@media (min-width: 768px) and (max-wHiddeidth: 1023px) {
  .class-grid-landing {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Mobile Notch Style - Deep Tucked Corner */
@media (max-width: 640px) {
  .chat-float-container {
    bottom: 0 !important; 
    right: 0 !important;
    padding: 0 !important; 
    margin: 0 !important;
    /* Fixes position to the absolute edge */
    overflow: hidden; 
  }

  .kimi-orb {
    width: 65px;
    height: 65px;
    /* Pushed further right (35px) and down (35px) */
    /* Only about 30% of the button will be visible */
    transform: translate(35px, 35px); 
    
    /* Keep your existing blue color from image_82b378.png */
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    
    /* Rounded only on the top-left to look like a pull-out tab */
    border-radius: 24px 0 0 0; 
    
    /* Remove floating animation to keep it tucked */
    animation: none; 
    box-shadow: -2px -2px 10px rgba(0, 0, 0, 0.2);
  }

  /* Shift eyes to the top-left visible sliver */
  .orb-face {
    transform: translate(-18px, -18px) scale(0.8);
  }

  /* Remove outer glow to prevent it from overlapping text */
  .kimi-orb::before {
    display: none;
  }

  /* Ensure the full window still covers the screen when opened */
  .chat-window-modern:not(.hidden) {
    width: 100vw;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    transform: none;
  }
}

@media screen and (max-width: 480px) {
  .qa-contribute-btn {
    font-size: 10px !important;
    padding: 2px 8px !important;
    min-height: 22px !important;
    border-radius: 15px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  }
}


/* ============================================
   FROM: class-view.css
   ============================================ */

@media (max-width: 1023px) {
  .class-view-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 300px;
    height: 100vh;
    z-index: 1050;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    border-radius: 0;
    max-height: 100vh;
  }

  .sidebar.sidebar-open {
    transform: translateX(0);
    box-shadow: 2px 0 20px rgba(0, 0, 0, 0.3);
  }

  .sidebar-close {
    display: flex;
  }

  #mobile-filter-btn {
    display: inline-flex;
    width: 100%;
  }

  .content-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
  }

  .page-title {
    font-size: 1.75rem;
  }

  /* Improved Filter Layout for Mobile */
  .filter-bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    padding: var(--space-4);
  }

  .filter-group {
    min-width: auto;
  }

  .filter-group label {
    font-size: var(--text-xs);
  }

  .filter-select {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-3);
    height: 42px;
  }

  .lessons-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

@media (max-width: 767px) {
  .main-content {
    padding: var(--space-4) 16px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .filter-bar {
    padding: var(--space-3);
    gap: var(--space-2);
  }

  .lessons-container {
    padding: var(--space-4);
  }

  .lessons-count {
    font-size: var(--text-sm);
    padding: var(--space-3);
  }

  .lesson-card {
    padding: var(--space-4);
  }

  .lesson-card-title {
    font-size: var(--text-base);
  }

  .lesson-card-meta {
    flex-direction: column;
    gap: var(--space-2);
    align-items: flex-start;
  }

  .bookmark-btn {
    width: 36px;
    height: 36px;
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  #mobile-filter-btn span:not(.btn-icon) {
    display: none;
  }
  
  .btn-icon {
    margin-right: 0;
  }

  .sidebar {
    width: 260px;
  }
}

@media (max-width: 768px) {
  .logo-text span {
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  .chat-float-container {
    bottom: 20px;
    right: 20px;
  }

  /* Hide orb when chat is open on mobile */
  .chat-window-modern:not(.hidden) ~ .chat-orb-trigger {
    display: none;
  }

  .chat-window-modern {
    width: 100vw;
    height: 100vh;
    max-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: 0;
    border-radius: 0;
    z-index: 10000;
  }

  /* Adjust input area padding on mobile */
  .chat-input-area {
    padding: 16px 20px 20px;
  }

  .send-btn {
    padding: 12px 16px;
  }

  .kimi-orb {
    width: 60px;
    height: 60px;
  }

  .eye {
    width: 8px;
    height: 8px;
  }

  .orb-face {
    gap: 8px;
  }
}

/* Tablet */
@media (min-width: 641px) and (max-width: 1023px) {
  .chat-window-modern {
    width: 380px;
    height: 600px;
  }

  .chat-float-container {
    bottom: 1.5rem;
    right: 1.5rem;
  }
}

/* Desktop Responsive */
@media (max-width: 767px) {
  .hero-landing {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero-stats-landing {
    gap: var(--space-4);
  }

  .stat-card {
    padding: var(--space-3) var(--space-4);
  }

  .stat-icon {
    font-size: 1.5rem;
  }

  .stat-number {
    font-size: var(--text-xl);
  }

  .classes-section,
  .features-section {
    padding: 60px 0;
  }

  .class-grid-landing {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .class-card-landing {
    padding: var(--space-6);
  }

  .class-number {
    font-size: 3rem;
  }

  .features-grid-landing {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

@media (min-width: 768px) and (max-wHiddeidth: 1023px) {
  .class-grid-landing {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Fix dropdown overflow on small screens */
@media (max-width: 640px) {
  .filter-group {
    width: 100%;
  }

  .filter-group select {
    width: 100%;
    min-width: 0;          /* IMPORTANT: prevents overflow */
    box-sizing: border-box;
    font-size: 14px;       /* slightly smaller for mobile */
    padding: 10px 12px;
  }
}