/* CodeMaster Pro - Premium Stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Fira+Code:wght@400;500;600&display=swap');

:root {
  /* Color Palette - Indigo / Violet Dark Theme */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-input: #1f2937;
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.3);
  
  --secondary: #10b981;
  --secondary-hover: #059669;
  
  --accent: #ec4899;
  --accent-glow: rgba(236, 72, 153, 0.2);
  
  --border: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Outfit', sans-serif;
  --font-mono: 'Fira Code', monospace;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-input: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-glow: rgba(79, 70, 229, 0.15);
  
  --border: rgba(15, 23, 42, 0.08);
  --border-focus: #4f46e5;
  
  --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.05);
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.3s, color 0.3s;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font-family: inherit;
}

/* Glassmorphism Card Utility */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Navigation Layout */
.app-container {
  display: flex;
  flex: 1;
  min-height: calc(100vh - 70px);
}

/* Header Styles */
header.app-header {
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #fff 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-icon {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-text-fill-color: initial;
  color: white;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px var(--primary-glow);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.search-bar {
  position: relative;
  display: flex;
  align-items: center;
}

.search-bar input {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  padding: 0.5rem 1rem 0.5rem 2.5rem;
  width: 250px;
  transition: var(--transition);
}

.search-bar input:focus {
  outline: none;
  border-color: var(--border-focus);
  width: 320px;
  box-shadow: 0 0 10px var(--primary-glow);
}

.search-bar i {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
}

/* Toggle Switch */
.theme-toggle-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  background: var(--border);
  color: var(--text-primary);
}

/* User Badge Widget */
.user-widget {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.35rem 0.75rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  cursor: pointer;
}

.user-widget img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--primary);
}

.user-widget-info {
  display: flex;
  flex-direction: column;
}

.user-widget-name {
  font-size: 0.875rem;
  font-weight: 600;
}

.user-widget-points {
  font-size: 0.75rem;
  color: var(--secondary);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Sidebar Styles */
aside.app-sidebar {
  width: 280px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.sidebar-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sidebar-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  padding-left: 0.75rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

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

.sidebar-link:hover, .sidebar-link.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.sidebar-link.active i {
  color: white;
}

/* Main Content Layout */
main.app-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* Dashboard Statistics Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-info h3 {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.stat-info p {
  font-size: 2rem;
  font-weight: 800;
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
}

.stat-icon.blue { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.stat-icon.emerald { background: linear-gradient(135deg, #10b981, #047857); }
.stat-icon.indigo { background: linear-gradient(135deg, #6366f1, #4338ca); }
.stat-icon.pink { background: linear-gradient(135deg, #ec4899, #be185d); }

/* Courses Tracks Grid */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.course-card {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 250px;
}

.course-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.course-badge {
  background: var(--primary-glow);
  color: var(--primary);
  border: 1px solid var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.course-icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--primary);
}

.course-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.course-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 1.5rem;
  flex: 1;
}

.progress-bar-container {
  background: rgba(255, 255, 255, 0.05);
  height: 8px;
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.progress-bar-fill {
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.5s ease-out;
}

.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 0.95rem;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 8px 20px var(--primary-glow);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--border);
  border-color: var(--text-secondary);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* Dynamic Leaderboard Widget */
.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: -0.02em;
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.leaderboard-row {
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.leaderboard-row:hover {
  background: rgba(255, 255, 255, 0.02);
}

.leaderboard-cell {
  padding: 1.25rem 1rem;
  text-align: left;
}

.leaderboard-rank {
  font-weight: 800;
  width: 60px;
}

.leaderboard-rank.rank-1 { color: #f59e0b; }
.leaderboard-rank.rank-2 { color: #94a3b8; }
.leaderboard-rank.rank-3 { color: #b45309; }

.leaderboard-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.leaderboard-user img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.leaderboard-points {
  font-weight: 700;
  color: var(--secondary);
}

/* Interactive Course Viewer Page Details */
.course-viewer-container {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: calc(100vh - 70px);
}

.lessons-sidebar {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  max-height: calc(100vh - 70px);
  padding: 1.5rem 1rem;
}

.module-group {
  margin-bottom: 1.5rem;
}

.module-header-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lesson-list-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.lesson-item-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.lesson-item-btn:hover {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
}

.lesson-item-btn.active {
  background: var(--primary-glow);
  color: var(--primary);
  border-color: var(--primary);
  font-weight: 600;
}

.lesson-status-icon {
  font-size: 0.9rem;
}

.lesson-status-icon.completed {
  color: var(--secondary);
}

/* Workspace Frame (Editor + Explanations) */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: calc(100vh - 70px);
  overflow: hidden;
}

.workspace-explanation {
  padding: 2.5rem;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-height: calc(100vh - 70px);
}

.explanation-text {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.explanation-text p {
  margin-bottom: 1.25rem;
}

.explanation-text code {
  background: var(--bg-input);
  border: 1px solid var(--border);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

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

.code-editor-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #1e1e1e; /* Editor standard black */
  position: relative;
}

.editor-header {
  height: 48px;
  background: #181818;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
}

.editor-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.editor-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.editor-container-mount {
  flex: 1;
  position: relative;
}

/* Console Panel at bottom */
.console-panel {
  height: 220px;
  background: #151515;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.console-header {
  height: 40px;
  background: #0d0d0d;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.console-output {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #a8ffb2;
  white-space: pre-wrap;
}

.console-output.error {
  color: #ff8b8b;
}

/* Tabs for Editor widgets (Notes / Code) */
.tabs-container {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Quiz UI Components */
.quiz-wrapper {
  padding: 2rem;
  margin-top: 1rem;
}

.quiz-question {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.quiz-option-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.quiz-option-label:hover {
  background: rgba(255,255,255,0.02);
  border-color: var(--text-secondary);
}

.quiz-option-label input {
  accent-color: var(--primary);
}

.quiz-option-label.selected {
  background: var(--primary-glow);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

/* Achievement Badges Flex */
.badges-flex {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.badge-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

.badge-icon-img {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Forms (Login/Register) Style */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 140px);
  padding: 2rem;
}

.auth-form-card {
  width: 100%;
  max-width: 450px;
  padding: 3rem 2.5rem;
}

.auth-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.auth-header h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.auth-header p {
  color: var(--text-secondary);
}

.form-group {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-control {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 10px var(--primary-glow);
}

/* Notes Textarea styling */
.notes-textarea {
  width: 100%;
  height: 100%;
  min-height: 250px;
  background: #1a1a1a;
  border: none;
  color: #fff;
  padding: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  resize: none;
}

.notes-textarea:focus {
  outline: none;
}

/* Certificate Layout styles */
.certificate-preview-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
}

.certificate-border {
  border: 15px double var(--primary);
  background: #111827;
  padding: 4rem;
  text-align: center;
  max-width: 800px;
  width: 100%;
  position: relative;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.certificate-title {
  font-family: 'Outfit', sans-serif;
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.certificate-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 2rem;
}

.certificate-recipient {
  font-size: 2.25rem;
  font-weight: 700;
  color: white;
  text-decoration: underline;
  margin-bottom: 1.5rem;
}

.certificate-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.certificate-course {
  font-weight: 700;
  color: var(--secondary);
}

.certificate-footer-layout {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
}

.certificate-sign {
  border-top: 1px solid var(--border);
  width: 200px;
  padding-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Admin Dashboard CSS layout */
.admin-stats-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

/* Responsive elements */
@media (max-width: 1024px) {
  .workspace-grid {
    grid-template-columns: 1fr;
    height: auto;
    overflow: visible;
  }
  .workspace-explanation {
    max-height: none;
  }
  .course-viewer-container {
    grid-template-columns: 1fr;
  }
  .lessons-sidebar {
    max-height: 300px;
  }
}

@media (max-width: 768px) {
  .app-container {
    flex-direction: column;
  }
  aside.app-sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  header.app-header {
    padding: 0 1rem;
  }
  .search-bar input {
    width: 150px;
  }
  .search-bar input:focus {
    width: 200px;
  }
}