/*
  Economic Geography Course Styles
  Extends base.css with course-specific components
  Note: No decorative/expressive icons per instructor request
*/

/* ===== COURSE NAVIGATION BAR ===== */
.course-nav {
  background: white;
  border-bottom: 2px solid var(--color-primary);
  position: sticky;
  top: 73px;
  z-index: 999;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.course-nav .container {
  padding: 0 2rem;
}

.course-nav ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0;
}

.course-nav li {
  margin: 0;
  padding: 0;
}

.course-nav li::before {
  display: none;
}

.course-nav a {
  display: block;
  padding: 1rem 1.5rem;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
}

.course-nav a:hover,
.course-nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  background-color: var(--color-surface);
  text-decoration: none;
}

/* ===== COURSE SECTIONS ===== */
.course-section {
  margin-bottom: 4rem;
}

.course-intro {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: 10px;
  margin-bottom: 2rem;
  border-left: 4px solid var(--color-primary);
}

.course-intro .lead {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

/* ===== INFO CARDS ===== */
.info-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.info-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.info-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.info-card h3 {
  color: var(--color-primary);
  margin-top: 0;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-surface);
  font-size: 1.2rem;
}

.info-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.info-card ul li {
  padding: 0.5rem 0;
  margin: 0;
  border-bottom: 1px solid var(--color-surface);
  font-size: 0.95rem;
}

.info-card ul li:last-child {
  border-bottom: none;
}

.info-card ul li::before {
  display: none;
}

/* ===== QUICK LINKS GRID ===== */
.quick-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.quick-link-card {
  background: white;
  border: 2px solid var(--color-border);
  border-radius: 10px;
  padding: 2rem;
  text-align: center;
  text-decoration: none;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 150px;
}

.quick-link-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  text-decoration: none;
}

.quick-link-content h3 {
  color: var(--color-primary);
  margin: 0 0 0.75rem 0;
  font-size: 1.25rem;
  transition: color var(--transition-fast);
}

.quick-link-card:hover .quick-link-content h3 {
  color: var(--color-primary-dark);
}

.quick-link-content p {
  color: var(--color-text-light);
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
}

/* ===== OUTCOMES GRID ===== */
.outcomes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.outcome-card {
  background: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  border-radius: 8px;
  padding: 1.75rem;
}

.outcome-card h3 {
  color: var(--color-primary);
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.outcome-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.outcome-card ul li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.75rem;
  margin: 0;
  line-height: 1.6;
  font-size: 0.95rem;
}

.outcome-card ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
  font-size: 1.1rem;
}

/* ===== ASSIGNMENTS OVERVIEW ===== */
.assignments-overview {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: 2rem 0;
}

.assignment-type {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.5rem;
  transition: all var(--transition-normal);
}

.assignment-type:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.assignment-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.assignment-header h3 {
  color: var(--color-primary);
  margin: 0;
  font-size: 1.2rem;
}

.assignment-header .points {
  background: var(--color-primary);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

.assignment-type p {
  color: var(--color-text-light);
  margin-bottom: 1rem;
  line-height: 1.6;
}

/* ===== GRADING SUMMARY ===== */
.grading-summary {
  background: var(--color-surface);
  border-radius: 10px;
  padding: 2rem;
  margin-top: 2rem;
}

.grading-summary h3 {
  color: var(--color-primary);
  margin-top: 0;
  margin-bottom: 1.5rem;
  text-align: center;
}

.grade-breakdown {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.grade-item {
  display: grid;
  grid-template-columns: 150px 1fr 60px;
  align-items: center;
  gap: 1rem;
}

.grade-category {
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.95rem;
}

.grade-bar {
  height: 30px;
  background: var(--color-primary);
  border-radius: 15px;
  width: var(--percentage);
  min-width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: width 0.6s ease;
}

.grade-percent {
  font-weight: 600;
  color: var(--color-primary);
  text-align: right;
}

.total-points {
  text-align: center;
  font-size: 1.1rem;
  color: var(--color-primary);
  margin: 0;
  padding-top: 1rem;
  border-top: 2px solid var(--color-border);
}

/* ===== TOPICS GRID ===== */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.topic-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
  transition: all var(--transition-normal);
  cursor: default;
}

.topic-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.topic-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: white;
  font-weight: bold;
  font-size: 1.2rem;
  border-radius: 50%;
  margin-bottom: 0.75rem;
}

.topic-card h4 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.4;
}

/* ===== ALERT BOXES ===== */
.alert-box {
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  border-left: 4px solid;
}

.alert-box h3 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.alert-box.info {
  background: #e8f4f8;
  border-color: #0288d1;
}

.alert-box.info h3 {
  color: #0288d1;
}

.alert-box.important {
  background: #fff3e0;
  border-color: #f57c00;
}

.alert-box.important h3 {
  color: #f57c00;
}

.alert-box.success {
  background: #e8f5e9;
  border-color: #388e3c;
}

.alert-box.success h3 {
  color: #388e3c;
}

.alert-box.warning {
  background: #ffebee;
  border-color: #d32f2f;
}

.alert-box.warning h3 {
  color: #d32f2f;
}

.alert-box ul {
  margin: 0.5rem 0 0 0;
}

.alert-box ul li::before {
  color: inherit;
}

/* ===== CHAPTER PAGE STYLES ===== */
.chapter-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: 3rem 0;
  margin: -3rem 0 3rem 0;
  text-align: center;
}

.chapter-header h1 {
  color: white;
  margin: 0;
  font-size: 2.5rem;
}

.chapter-header .chapter-number {
  font-size: 1rem;
  opacity: 0.9;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  height: 0;
  overflow: hidden;
  background: #000;
  border-radius: 10px;
  margin: 2rem 0;
  box-shadow: var(--shadow-lg);
}

.video-container video,
.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.lecture-sections {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: 2rem 0;
}

.lecture-section {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.5rem;
}

.lecture-section h3 {
  color: var(--color-primary);
  margin-top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.lecture-section .duration {
  font-size: 0.9rem;
  color: var(--color-text-light);
  font-weight: 400;
}

.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.resource-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.resource-links a:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  text-decoration: none;
}

/* ===== CHAPTERS LIST ===== */
.chapters-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 2rem 0;
}

.chapter-link-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.5rem;
  text-decoration: none;
  transition: all var(--transition-normal);
}

.chapter-link-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateX(8px);
  text-decoration: none;
}

.chapter-link-number {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: white;
  font-weight: bold;
  font-size: 1.3rem;
  border-radius: 10px;
}

.chapter-link-content {
  flex: 1;
}

.chapter-link-content h3 {
  margin: 0 0 0.25rem 0;
  color: var(--color-text);
  font-size: 1.2rem;
}

.chapter-link-card:hover .chapter-link-content h3 {
  color: var(--color-primary);
}

.chapter-link-content p {
  margin: 0;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.chapter-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--color-text-light);
  flex-wrap: wrap;
}

/* ===== ASSIGNMENT CARDS ===== */
.assignment-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.assignment-card {
  background: white;
  border: 2px solid var(--color-border);
  border-radius: 10px;
  padding: 1.75rem;
  transition: all var(--transition-normal);
}

.assignment-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.assignment-card h3 {
  color: var(--color-primary);
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
}

.assignment-card .due-date {
  display: inline-block;
  background: var(--color-accent);
  color: white;
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.assignment-card p {
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.assignment-card .btn-outline {
  display: inline-block;
  width: 100%;
  text-align: center;
}

/* ===== NAVIGATION BUTTONS ===== */
.chapter-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 3rem 0 2rem 0;
  padding: 1.5rem 0;
  border-top: 2px solid var(--color-border);
  border-bottom: 2px solid var(--color-border);
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: white;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  background: var(--color-primary);
  color: white;
  text-decoration: none;
  transform: translateX(0);
}

.nav-btn.prev:hover {
  transform: translateX(-4px);
}

.nav-btn.next:hover {
  transform: translateX(4px);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 900px) {
  .course-nav {
    top: auto;
    position: relative;
  }

  .info-cards {
    grid-template-columns: 1fr;
  }

  .outcomes-grid {
    grid-template-columns: 1fr;
  }

  .grade-item {
    grid-template-columns: 120px 1fr 50px;
    gap: 0.75rem;
  }

  .topics-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
}

@media (max-width: 600px) {
  .course-nav ul {
    flex-direction: column;
  }

  .course-nav a {
    padding: 0.75rem 1rem;
    border-bottom: none;
    border-left: 3px solid transparent;
  }

  .course-nav a:hover,
  .course-nav a.active {
    border-left-color: var(--color-primary);
    border-bottom-color: transparent;
  }

  .quick-links-grid {
    grid-template-columns: 1fr;
  }

  .assignment-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .grade-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .grade-bar {
    width: 100% !important;
  }

  .grade-percent {
    text-align: left;
  }

  .chapter-link-card {
    flex-direction: column;
    text-align: center;
  }

  .chapter-navigation {
    flex-direction: column;
  }

  .nav-btn {
    width: 100%;
    justify-content: center;
  }
}

/* ===== UTILITY CLASSES ===== */
.text-muted {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
}

.badge.primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.badge.accent {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}