/* Courses Page Styles */
:root {
  --primary: #ff6600;
  --primary-dark: #e55a00;
  --secondary: #ff8533;
  --success: #4caf50;
  --danger: #ff6b6b;
  --bg: #ffffff;
  --card-bg: #ffffff;
  --text: #333;
  --text-light: #666;
  --border: #e0e0e0;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Nunito, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.courses-container {
  min-height: 100vh;
}

/* Header */
.courses-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: 30px 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 6px;
}

.courses-logo {
  height: 54px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  opacity: 0.9;
  margin-left: -8px;
}

.header-content h1 {
  font-size: 30px;
  margin-bottom: 6px;
}

.header-content p {
  font-size: 16px;
  opacity: 0.9;
}

/* Buttons */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 102, 0, 0.4);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-secondary {
  background: var(--secondary);
  color: white;
}

.btn-secondary:hover {
  background: #6a3f95;
}

/* Filters Section */
.filters-section {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: flex-end;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.filter-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.filter-group select,
.filter-group input {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.3s ease;
}

.filter-group select:focus,
.filter-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.15);
}

.filter-group input {
  min-width: 200px;
}

/* Courses Grid */
.browse-courses {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.course-card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border: 2px solid transparent;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
  border-color: var(--primary);
}

.course-card-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  padding: 30px 20px;
  color: white;
  text-align: center;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.course-card-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.course-card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.course-card-meta {
  font-size: 13px;
  opacity: 0.9;
}

.course-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-info {
  margin-bottom: 16px;
  flex: 1;
}

.course-level {
  display: inline-block;
  background: rgba(255, 102, 0, 0.12);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.course-lessons {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 8px;
}

.course-description {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.5;
  margin-bottom: 12px;
}

.course-enrolled-badge {
  background: var(--success);
  color: white;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  text-align: center;
  margin-bottom: 12px;
}

.course-card-footer {
  display: flex;
  gap: 10px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.course-card-footer button {
  flex: 1;
  padding: 10px 12px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-enroll {
  background: var(--primary);
  color: white;
}

.btn-enroll:hover {
  background: var(--primary-dark);
}

.btn-view {
  background: var(--bg);
  color: var(--primary);
  border: 1px solid var(--border);
}

.btn-view:hover {
  background: var(--primary);
  color: white;
}

/* Loading */
.loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-light);
  font-size: 16px;
}

.loading::after {
  content: " ...";
  animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
  0%, 20% { color: rgba(0, 0, 0, 0); }
  40%, 60% { color: var(--text-light); }
  80%, 100% { color: rgba(0, 0, 0, 0); }
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  overflow-y: auto;
  padding: 20px;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  display: none;
}

.modal.active ~ .modal-overlay {
  display: block;
}

.modal-content {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  position: relative;
  max-width: 500px;
  width: 100%;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 28px;
  color: var(--text-light);
  cursor: pointer;
  z-index: 10;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.modal-close:hover {
  color: var(--text);
  transform: rotate(90deg);
}

/* Enrollment Modal */
.enroll-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: 40px 30px;
  text-align: center;
}

.enroll-icon {
  font-size: 56px;
  margin-bottom: 16px;
  display: block;
}

.enroll-header h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.enroll-header .text-muted {
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
}

.enroll-details {
  padding: 30px;
  background: #f8f9fa;
  border-bottom: 1px solid var(--border);
}

.detail-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  font-size: 14px;
}

.detail-item:not(:last-child) {
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
}

.detail-label {
  color: var(--text-light);
  font-weight: 500;
}

.detail-value {
  color: var(--text);
  font-weight: 600;
}

.enroll-message {
  padding: 20px 30px;
  font-size: 14px;
  color: var(--text-light);
}

.modal-footer {
  padding: 20px 30px;
  display: flex;
  gap: 10px;
  border-top: 1px solid var(--border);
}

.modal-footer button {
  flex: 1;
}

/* Utilities */
.text-muted {
  color: var(--text-light);
}

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-content h1 {
    font-size: 24px;
  }

  .filters-section {
    margin: 30px auto;
    flex-direction: column;
  }

  .filter-group input {
    min-width: 100%;
  }

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

  .modal-content {
    border-radius: 16px 16px 0 0;
  }
}