/**
 * Responsive Component Patterns
 * =============================
 * This file documents and centralizes the 5 key responsive patterns used throughout the system.
 * Import this file after critical.css to establish consistent responsive behavior.
 * 
 * Patterns:
 * 1. Responsive Table Pattern - Safe horizontal scrolling on small screens
 * 2. Form Grid Pattern - Multi-column to single-column stacking
 * 3. Button/Action Bar Wrapping - Flexible button group wrapping
 * 4. Modal/Drawer Behavior - Off-canvas and overlay patterns
 * 5. Card/List Mobile Fallback - Grid to list fallback for dense data
 */

/* ============================================================================
 * PATTERN 1: RESPONSIVE TABLE PATTERN
 * Use: Wrapping data tables for safe horizontal overflow on small screens
 * ============================================================================ */

.table-responsive {
  display: block;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
}

.table-responsive table {
  margin-bottom: 0;
  min-width: 100%;
}

@media (max-width: 768px) {
  .table-responsive {
    max-width: 100%;
    margin-left: 0;
    margin-right: 0;
    padding: 0;
  }

  .table-responsive table {
    font-size: 0.875rem;
  }

  .table-responsive th,
  .table-responsive td {
    padding: 0.5rem 0.75rem;
    white-space: normal;
  }
}

/* Alternative: Card-based table fallback for very small screens */
@media (max-width: 480px) {
  .table-responsive {
    display: block;
    max-width: 100%;
    margin: 0;
    padding: 0;
  }

  .table-responsive table {
    display: block;
  }

  .table-responsive thead {
    display: none;
  }

  .table-responsive tbody {
    display: block;
  }

  .table-responsive tr {
    display: block;
    border: 1px solid #ddd;
    margin-bottom: 1rem;
    border-radius: 4px;
    overflow: hidden;
  }

  .table-responsive td {
    display: block;
    text-align: right;
    padding: 0.75rem;
    position: relative;
    padding-left: 50%;
  }

  .table-responsive td::before {
    content: attr(data-label);
    position: absolute;
    left: 0.75rem;
    font-weight: bold;
    text-align: left;
  }
}

/* ============================================================================
 * PATTERN 2: FORM GRID PATTERN
 * Use: Multi-column forms that stack to single column on small screens
 * ============================================================================ */

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.form-grid--full {
  grid-column: 1 / -1;
}

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 1rem;
}

.form-group label {
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.5rem 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
}

@media (max-width: 768px) {
  .form-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-bottom: 1rem;
  }

  .form-group label {
    font-size: 0.9rem;
  }

  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: 0.75rem;
    font-size: 16px; /* Prevents zoom on iOS */
  }
}

/* ============================================================================
 * PATTERN 3: BUTTON/ACTION BAR WRAPPING PATTERN
 * Use: Button groups that wrap flexibly on small screens
 * ============================================================================ */

.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
  align-items: center;
}

.action-bar--centered {
  justify-content: center;
}

.action-bar--right {
  justify-content: flex-end;
}

.action-bar--space-between {
  justify-content: space-between;
}

.action-bar button,
.action-bar a.btn,
.action-bar input[type="submit"],
.action-bar input[type="button"] {
  white-space: nowrap;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.2s;
}

@media (max-width: 768px) {
  .action-bar {
    gap: 0.25rem;
    margin: 0.75rem 0;
  }

  .action-bar button,
  .action-bar a.btn,
  .action-bar input[type="submit"],
  .action-bar input[type="button"] {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    min-height: 44px; /* Touch target */
  }

  .action-bar--space-between {
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  .action-bar {
    flex-direction: column;
  }

  .action-bar button,
  .action-bar a.btn,
  .action-bar input[type="submit"],
  .action-bar input[type="button"] {
    width: 100%;
    text-align: center;
  }

  .action-bar--centered {
    justify-content: stretch;
  }

  .action-bar--right {
    justify-content: stretch;
  }
}

/* ============================================================================
 * PATTERN 4: MODAL/DRAWER BEHAVIOR PATTERN
 * Use: Off-canvas sidebars and overlay modals for navigation
 * ============================================================================ */

/* Sidebar/Drawer Container */
.drawer {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 250px;
  background: white;
  z-index: 999;
  transform: translateX(-100%);
  transition: transform 0.3s ease-out;
  box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
  overflow-y: auto;
}

.drawer.open {
  transform: translateX(0);
}

/* Overlay/Backdrop */
.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease-out;
}

.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* Toggle Button for Drawer */
.drawer-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1000;
  background: #333;
  color: white;
  border: none;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

.drawer-toggle:hover {
  background: #555;
}

@media (max-width: 768px) {
  .drawer-toggle {
    display: block;
  }

  .drawer {
    width: 80%;
    max-width: 250px;
  }
}

@media (max-width: 480px) {
  .drawer {
    width: 100%;
  }

  .drawer-toggle {
    top: 0.5rem;
    left: 0.5rem;
    padding: 0.5rem;
    font-size: 1.2rem;
  }
}

/* ============================================================================
 * PATTERN 5: CARD/LIST MOBILE FALLBACK PATTERN
 * Use: Grid of cards that falls back to list on small screens
 * ============================================================================ */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.card {
  background: white;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card-content {
  font-size: 0.95rem;
  color: #666;
  margin-bottom: 1rem;
}

.card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
  }

  .card {
    padding: 1rem;
  }

  .card-title {
    font-size: 1rem;
  }

  .card-content {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .card-grid {
    display: block;
  }

  .card {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
  }

  .card-title {
    margin-bottom: 0.25rem;
  }

  .card-actions {
    margin-left: auto;
    flex-wrap: wrap;
  }
}

/* ============================================================================
 * ACCESSIBILITY ENHANCEMENTS (Phase 6)
 * ============================================================================ */

/* Keyboard Focus Visibility - Always visible for keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid #4A90E2;
  outline-offset: 2px;
}

/* Touch Target Minimum Size - 44x44px per WCAG recommendations */
button,
a.btn,
input[type="button"],
input[type="submit"],
input[type="reset"],
a[role="button"],
.action-bar button {
  min-height: 44px;
  min-width: 44px;
}

.drawer-toggle {
  min-height: 44px;
  min-width: 44px;
}

/* Text Readability on Small Screens */
@media (max-width: 480px) {
  body {
    font-size: 16px; /* Prevents iOS zoom on input focus */
  }

  h1, .h1 {
    font-size: 1.5rem;
    line-height: 1.2;
  }

  h2, .h2 {
    font-size: 1.3rem;
    line-height: 1.3;
  }

  h3, .h3 {
    font-size: 1.1rem;
    line-height: 1.4;
  }

  p {
    line-height: 1.6;
  }

  label {
    font-size: 0.95rem;
    line-height: 1.4;
  }
}

/* Prevent Unintended Horizontal Scrolling */
body,
html {
  overflow-x: hidden;
  width: 100%;
}

.container,
.main-content {
  max-width: 100%;
  overflow-x: hidden;
}

/* Ensure overflow: auto elements don't create unexpected scroll */
@media (max-width: 768px) {
  table {
    display: block;
    width: 100%;
    overflow-x: auto;
  }

  .responsive-table-wrapper {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* ============================================================================
 * HELPER UTILITIES
 * ============================================================================ */

/* Hide/Show by Breakpoint */
.hide-mobile {
  display: none;
}

.show-mobile {
  display: block;
}

@media (min-width: 769px) {
  .hide-mobile {
    display: block;
  }

  .show-mobile {
    display: none;
  }
}

/* Touch-Friendly Minimum Size */
.touch-target {
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Responsive Spacing */
.spacing-mobile-reduced {
  margin: 0.5rem 0;
}

@media (min-width: 769px) {
  .spacing-mobile-reduced {
    margin: 1rem 0;
  }
}

/* Responsive Typography */
.text-responsive {
  font-size: clamp(0.875rem, 2vw, 1.125rem);
}

/* Container Queries Alternative (if needed) */
.container-responsive {
  width: 100%;
  max-width: 100%;
  padding: 0 1rem;
  margin: 0 auto;
}

@media (min-width: 480px) {
  .container-responsive {
    padding: 0 1.5rem;
  }
}

@media (min-width: 768px) {
  .container-responsive {
    max-width: 720px;
    padding: 0 2rem;
  }
}

@media (min-width: 1024px) {
  .container-responsive {
    max-width: 960px;
  }
}

@media (min-width: 1280px) {
  .container-responsive {
    max-width: 1140px;
  }
}

/* ============================================================================
 * ADDED: CONSISTENT SIDEBAR COMPONENT STYLES
 * ============================================================================ */

/* General Sidebar Item Styling */
.sidebar-item {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 12px 20px;
  color: #e0e0e0;
  text-decoration: none;
  font-weight: 500;
  transition: background-color 0.2s, color 0.2s;
  border-left: 4px solid transparent;
}

.sidebar-link:hover,
.sidebar-link.active {
  background-color: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-left-color: #F8A617; /* Accent color */
}

.sidebar-link i {
  width: 20px;
  text-align: center;
  font-size: 1.1rem;
}

/* Logout Button Styling */
.logout-item {
  margin-top: auto; /* Pushes to the bottom */
}

.logout-btn {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
}

/* Course Switcher Styling */
.course-switcher {
  padding: 15px 20px;
  background-color: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.course-switch-form {
  margin: 0;
}

.course-switch-select {
  width: 100%;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #5c2c3a;
  background-color: #f4f2ee;
  color: #4A0018;
  font-weight: 600;
  cursor: pointer;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%234A0018' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.7rem center;
  background-size: 1em;
}

.course-switch-select:focus {
  outline: none;
  border-color: #F8A617;
  box-shadow: 0 0 0 2px rgba(248, 166, 23, 0.5);
}

/* Hides the label but keeps it accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Ensure the menu list fills the space for logout button positioning */
.sidebar .menu-list {
    display: flex;
    flex-direction: column;
    height: 100%;
}