/* Base Styles */
:root {
  --primary-color: #3d5af1;
  --primary-dark: #2c3e94;
  --secondary-color: #ff7b54;
  --text-color: #333333;
  --text-light: #666666;
  --background-light: #f8f9fa;
  --background-dark: #343a40;
  --success-color: #28a745;
  --error-color: #dc3545;
  --warning-color: #ffc107;
  --border-color: #dee2e6;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-light);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

a {
  text-decoration: none;
  color: var(--primary-color);
}

button {
  cursor: pointer;
  border: none;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
}

.logo h1 {
  color: var(--primary-color);
  font-size: 28px;
  margin-bottom: 5px;
}

.tagline {
  color: var(--text-light);
  font-size: 14px;
}

.profile {
  display: flex;
  align-items: center;
  gap: 10px;
}

.profile-img {
  border-radius: 50%;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 40px 0;
  margin-bottom: 30px;
  background-color: #fff;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-top: 30px;
}

.hero h2 {
  font-size: 32px;
  margin-bottom: 15px;
  color: var(--primary-color);
}

/* Challenge Selector */
.challenge-selector {
  margin-bottom: 40px;
}

.path-selection {
  margin-bottom: 20px;
}

.path-buttons {
  display: flex;
  gap: 15px;
  margin-top: 15px;
}

.path-btn {
  padding: 10px 20px;
  background-color: var(--background-light);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  font-weight: 600;
}

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

.challenge-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.challenge-card {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 20px;
  transition: var(--transition);
  border-left: 5px solid var(--primary-color);
  cursor: pointer;
}

.challenge-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.challenge-card h4 {
  margin-bottom: 10px;
  color: var(--primary-color);
}

.challenge-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 15px;
  font-size: 14px;
  color: var(--text-light);
}

.card-badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
}

.beginner {
  background-color: #e7f5ff;
  color: #1971c2;
}

.intermediate {
  background-color: #fff3bf;
  color: #e67700;
}

.advanced {
  background-color: #ffe3e3;
  color: #c92a2a;
}

.challenge-status {
  display: flex;
  align-items: center;
  gap: 5px;
}

.status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.not-started {
  background-color: #ced4da;
}

.completed {
  background-color: var(--success-color);
}

/* Current Challenge */
.current-challenge {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 30px;
  margin-bottom: 40px;
}

.challenge-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 15px;
}

.challenge-header h3 {
  color: var(--primary-color);
  font-size: 22px;
}

.challenge-info {
  display: flex;
  gap: 15px;
  align-items: center;
}

.estimated-time {
  color: var(--text-light);
  font-size: 14px;
}

.challenge-description {
  margin-bottom: 30px;
  padding: 20px;
  background-color: var(--background-light);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--primary-color);
}

.challenge-description ul, .challenge-description ol {
  margin-left: 20px;
  margin-top: 10px;
  margin-bottom: 10px;
}

.challenge-description code {
  background-color: #f1f1f1;
  padding: 2px 4px;
  border-radius: 4px;
  font-family: monospace;
}

.challenge-description pre {
  background-color: #f1f1f1;
  padding: 15px;
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin: 15px 0;
  font-family: monospace;
}

/* Editor */
.editor-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 30px;
}

.editor-wrapper, .preview-wrapper {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 15px;
  background-color: var(--background-dark);
  color: white;
}

.icon-btn {
  background-color: transparent;
  color: white;
  padding: 5px 10px;
  font-size: 14px;
}

.run-btn {
  background-color: var(--success-color);
  color: white;
  padding: 5px 15px;
  font-size: 14px;
}

.code-editor {
  height: 400px;
  background-color: #1e1e1e;
}

#code-input {
  width: 100%;
  height: 100%;
  padding: 15px;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 14px;
  line-height: 1.5;
  color: #d4d4d4;
  background-color: #1e1e1e;
  border: none;
  resize: none;
  outline: none;
}

.preview {
  height: 400px;
  background-color: white;
}

#preview-frame {
  width: 100%;
  height: 100%;
  border: none;
}

.output {
  width: 100%;
  height: 100%;
  padding: 15px;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 14px;
  overflow-y: auto;
  background-color: #f8f8f8;
  display: none;
}

/* Controls */
.challenge-controls {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.hint-btn {
  background-color: #f8f9fa;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  font-size: 14px;
}

.hint-content {
  display: none;
  margin-top: 15px;
  padding: 15px;
  background-color: #fff8e6;
  border-left: 4px solid var(--warning-color);
  border-radius: var(--border-radius);
}

.navigation-btns {
  display: flex;
  gap: 15px;
}

.check-btn {
  background-color: var(--primary-color);
  color: white;
  padding: 10px 20px;
}

.next-btn {
  background-color: var(--success-color);
  color: white;
  padding: 10px 20px;
}

.next-btn:disabled {
  background-color: #ced4da;
  cursor: not-allowed;
}

.status-message {
  padding: 15px;
  border-radius: var(--border-radius);
  margin-top: 20px;
  display: none;
}

.success-message {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
  display: block;
}

.error-message {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
  display: block;
}

/* Progress */
.progress-container {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 30px;
  margin-bottom: 40px;
}

.progress-container h3 {
  margin-bottom: 20px;
  color: var(--primary-color);
}

.progress-track {
  margin-bottom: 25px;
}

.progress-bar {
  height: 10px;
  background-color: #e9ecef;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 10px;
}

.progress-fill {
  height: 100%;
  background-color: var(--primary-color);
  width: 0%;
  transition: width 0.5s ease;
}

.badges {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.badge {
  text-align: center;
  padding: 20px;
  border-radius: var(--border-radius);
  background-color: var(--background-light);
  border: 1px dashed var(--border-color);
  width: 150px;
}

.badge.unlocked {
  background-color: #fff;
  border: 1px solid var(--success-color);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.badge-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.badge-name {
  font-weight: 600;
  margin-bottom: 5px;
}

.badge-description {
  font-size: 12px;
  color: var(--text-light);
}

/* Footer */
footer {
  background-color: var(--background-dark);
  color: white;
  padding: 50px 0 20px;
  margin-top: 60px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 30px;
}

.footer-logo h2 {
  color: white;
  margin-bottom: 15px;
}

.footer-links h4, .footer-contact h4 {
  margin-bottom: 15px;
  color: white;
}

.footer-links ul {
  list-style: none;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  color: #adb5bd;
  transition: var(--transition);
}

.footer-links ul li a:hover {
  color: white;
}

.footer-contact p {
  margin-bottom: 10px;
  color: #adb5bd;
}

.social-links {
  display: flex;
  gap: 15px;
  margin-top: 15px;
}

.social-icon {
  display: inline-block;
  width: 32px;
  height: 32px;
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
  border-radius: 50%;
  text-align: center;
  line-height: 32px;
  transition: var(--transition);
}

.social-icon:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #adb5bd;
  font-size: 14px;
}

/* Responsive */
@media (max-width: 992px) {
  .editor-container {
      grid-template-columns: 1fr;
  }
  
  .footer-content {
      grid-template-columns: 1fr 1fr;
  }
  
  .footer-logo {
      grid-column: 1 / 3;
  }
}

@media (max-width: 768px) {
  .challenge-header {
      flex-direction: column;
      align-items: flex-start;
  }
  
  .challenge-info {
      margin-top: 10px;
  }
  
  .challenge-controls {
      flex-direction: column;
      gap: 20px;
  }
  
  .navigation-btns {
      width: 100%;
  }
  
  .footer-content {
      grid-template-columns: 1fr;
  }
  
  .footer-logo {
      grid-column: 1;
  }
  
  .challenge-cards {
      grid-template-columns: 1fr;
  }
}