:root {
  --bg-primary: #0a0e27;
  --bg-secondary: #131829;
  --bg-tertiary: #1a1f3a;
  --accent-cyan: #00d4ff;
  --accent-blue: #0066ff;
  --accent-teal: #00ffcc;
  --text-primary: #ffffff;
  --text-secondary: #a8b2d1;
  --text-muted: #6b7790;
  --border-color: rgba(0, 212, 255, 0.2);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
  --transition-speed: 0.3s;
}

body.light-theme {
  --bg-primary: #f0f4f8;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e8eef5;
  --accent-cyan: #0088cc;
  --accent-blue: #0044aa;
  --accent-teal: #00aa88;
  --text-primary: #1a1f3a;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --border-color: rgba(0, 136, 204, 0.2);
  --shadow-glow: 0 0 20px rgba(0, 136, 204, 0.15);
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

#app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 280px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  z-index: 100;
  transition: transform 0.3s ease, background-color var(--transition-speed);
}

.sidebar-header {
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  color: var(--accent-cyan);
}

.logo-cube {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border-radius: 6px;
  position: relative;
  animation: logoPulse 2s ease-in-out infinite;
  transform-style: preserve-3d;
}

@keyframes logoPulse {
  0%, 100% {
    transform: scale(1) rotateZ(0deg);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
  }
  50% {
    transform: scale(1.1) rotateZ(180deg);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.8);
  }
}

.theme-toggle {
  width: 50px;
  height: 26px;
  background: var(--bg-tertiary);
  border-radius: 13px;
  cursor: pointer;
  position: relative;
  border: 2px solid var(--border-color);
  transition: all var(--transition-speed);
}

.theme-toggle:hover {
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.toggle-icon {
  width: 18px;
  height: 18px;
  background: var(--accent-cyan);
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform var(--transition-speed);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

body.light-theme .toggle-icon {
  transform: translateX(24px);
}

.nav-menu {
  list-style: none;
  padding: 16px 0;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  cursor: pointer;
  transition: all var(--transition-speed);
  position: relative;
  color: var(--text-secondary);
}

.nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 4px;
  background: var(--accent-cyan);
  transform: scaleY(0);
  transition: transform var(--transition-speed);
}

.nav-item:hover,
.nav-item.active {
  background: rgba(0, 212, 255, 0.1);
  color: var(--text-primary);
  transform: translateX(4px);
}

.nav-item:hover::before,
.nav-item.active::before {
  transform: scaleY(1);
}

.nav-icon {
  font-size: 20px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 8px;
  transition: all var(--transition-speed);
}

.nav-item:hover .nav-icon,
.nav-item.active .nav-icon {
  background: var(--accent-cyan);
  transform: rotateY(360deg);
  box-shadow: var(--shadow-glow);
}

.sidebar-footer {
  padding: 24px;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.progress-circle {
  width: 80px;
  height: 80px;
  margin: 0 auto 12px;
  position: relative;
}

.progress-circle svg {
  transform: rotate(-90deg);
}

.circle-bg {
  fill: none;
  stroke: var(--bg-tertiary);
  stroke-width: 3;
}

.circle {
  fill: none;
  stroke: var(--accent-cyan);
  stroke-width: 3;
  stroke-linecap: round;
  animation: progress 2s ease-out forwards;
}

@keyframes progress {
  from {
    stroke-dasharray: 0, 100;
  }
}

.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-cyan);
}

.sidebar-footer p {
  color: var(--text-muted);
  font-size: 14px;
}

.main-content {
  margin-left: 280px;
  flex: 1;
  padding: 40px;
  min-height: 100vh;
}

.content-section {
  display: none;
  animation: fadeIn 0.6s ease-out;
}

.content-section.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  min-height: 80vh;
  perspective: 1000px;
}

.hero-text {
  flex: 1;
  animation: slideInLeft 1s ease-out;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.hero-title {
  font-size: 56px;
  line-height: 1.2;
  margin-bottom: 24px;
  font-weight: 800;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue), var(--accent-teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite;
  background-size: 200% 200%;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.cta-button {
  padding: 16px 48px;
  font-size: 18px;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all var(--transition-speed);
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.cta-button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.cta-button:hover::before {
  width: 300px;
  height: 300px;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 212, 255, 0.5);
}

.hero-3d {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  height: 500px;
}

.blockchain-cube {
  width: 200px;
  height: 200px;
  position: relative;
  transform-style: preserve-3d;
  animation: rotateCube 20s infinite linear;
}

@keyframes rotateCube {
  0% {
    transform: rotateX(0deg) rotateY(0deg);
  }
  100% {
    transform: rotateX(360deg) rotateY(360deg);
  }
}

.cube-face {
  position: absolute;
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 102, 255, 0.2));
  border: 2px solid var(--accent-cyan);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: bold;
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
}

.cube-face.front {
  transform: rotateY(0deg) translateZ(100px);
}

.cube-face.back {
  transform: rotateY(180deg) translateZ(100px);
}

.cube-face.right {
  transform: rotateY(90deg) translateZ(100px);
}

.cube-face.left {
  transform: rotateY(-90deg) translateZ(100px);
}

.cube-face.top {
  transform: rotateX(90deg) translateZ(100px);
}

.cube-face.bottom {
  transform: rotateX(-90deg) translateZ(100px);
}

.particles {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
}

.section-title {
  font-size: 42px;
  margin-bottom: 48px;
  color: var(--text-primary);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  width: 60%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-cyan), transparent);
  border-radius: 2px;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  margin-top: 32px;
}

.module-card {
  height: 320px;
  perspective: 1000px;
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.module-card:hover .card-inner {
  transform: rotateY(180deg);
}

.card-front,
.card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 16px;
  padding: 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: all var(--transition-speed);
}

.card-front {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card-back {
  transform: rotateY(180deg);
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.module-card:hover .card-front,
.module-card:hover .card-back {
  box-shadow: var(--shadow-glow);
  border-color: var(--accent-cyan);
}

.module-icon {
  font-size: 48px;
  margin-bottom: 16px;
  display: inline-block;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.module-card h3 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.module-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 15px;
}

.module-meta {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.module-meta span {
  font-size: 14px;
  color: var(--text-muted);
}

.card-back h4 {
  font-size: 18px;
  margin-bottom: 16px;
  color: var(--accent-cyan);
}

.card-back ul {
  list-style: none;
  flex: 1;
}

.card-back li {
  padding: 8px 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: 24px;
}

.card-back li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}

.module-btn {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.module-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: 60px;
  perspective: 1000px;
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-left: auto;
  animation: slideInRight 0.8s ease-out;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-right: auto;
  animation: slideInLeft 0.8s ease-out;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.timeline-marker {
  position: absolute;
  left: 50%;
  top: 0;
  width: 20px;
  height: 20px;
  background: var(--accent-cyan);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px var(--bg-primary), 0 0 0 6px var(--accent-cyan);
  z-index: 10;
}

.timeline-content {
  width: calc(50% - 40px);
  padding: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all var(--transition-speed);
}

.timeline-content:hover {
  transform: translateZ(20px) scale(1.05);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent-cyan);
}

.timeline-content h3 {
  color: var(--accent-cyan);
  font-size: 14px;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.timeline-content h4 {
  font-size: 22px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.timeline-content p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.career-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin-top: 32px;
}

.career-card {
  padding: 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  transition: all var(--transition-speed);
  cursor: pointer;
}

.career-card:hover {
  transform: translateY(-8px) rotateX(5deg);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent-cyan);
}

.career-card h3 {
  font-size: 22px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.salary {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}

.skills {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.skills li {
  padding: 6px 14px;
  background: var(--bg-tertiary);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.demand {
  margin-top: 16px;
}

.demand span {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.demand-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.demand-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
  border-radius: 4px;
  animation: fillBar 1.5s ease-out;
}

@keyframes fillBar {
  from { width: 0; }
}

.resources-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.resource-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all var(--transition-speed);
  cursor: pointer;
}

.resource-item:hover {
  transform: translateX(8px) rotateY(5deg);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent-cyan);
}

.resource-icon {
  font-size: 36px;
  flex-shrink: 0;
}

.resource-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.resource-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin-top: 32px;
}

.community-card {
  padding: 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  text-align: center;
  transition: all var(--transition-speed);
  cursor: pointer;
}

.community-card:hover {
  transform: translateY(-8px) scale(1.05);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent-cyan);
}

.community-icon {
  font-size: 56px;
  margin-bottom: 20px;
  display: inline-block;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.community-card h3 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.community-card p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

.join-btn {
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.join-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

.faq-list {
  max-width: 800px;
  margin: 32px auto 0;
}

.faq-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: all var(--transition-speed);
}

.faq-item:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.2);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px;
  cursor: pointer;
  user-select: none;
}

.faq-question span {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-toggle {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 50%;
  font-size: 24px;
  color: var(--accent-cyan);
  transition: all var(--transition-speed);
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  background: var(--accent-cyan);
  color: white;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 24px;
}

.faq-answer p {
  color: var(--text-secondary);
  line-height: 1.8;
}

@media (max-width: 1024px) {
  .hero-container {
    flex-direction: column;
    text-align: center;
  }

  .hero-title {
    font-size: 42px;
  }

  .timeline::before {
    left: 30px;
  }

  .timeline-marker {
    left: 30px;
  }

  .timeline-content {
    width: calc(100% - 80px);
    margin-left: 80px !important;
    margin-right: 0 !important;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.mobile-open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    padding: 20px;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .section-title {
    font-size: 32px;
  }

  .modules-grid,
  .career-grid,
  .community-grid {
    grid-template-columns: 1fr;
  }

  .blockchain-cube {
    width: 150px;
    height: 150px;
  }

  .cube-face {
    width: 150px;
    height: 150px;
  }

  .cube-face.front { transform: rotateY(0deg) translateZ(75px); }
  .cube-face.back { transform: rotateY(180deg) translateZ(75px); }
  .cube-face.right { transform: rotateY(90deg) translateZ(75px); }
  .cube-face.left { transform: rotateY(-90deg) translateZ(75px); }
  .cube-face.top { transform: rotateX(90deg) translateZ(75px); }
  .cube-face.bottom { transform: rotateX(-90deg) translateZ(75px); }
}

[data-tilt] {
  transition: transform 0.3s ease;
}

.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 200;
  background: var(--accent-cyan);
  border: none;
  border-radius: 8px;
  width: 50px;
  height: 50px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.4);
  transition: all var(--transition-speed);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 3px;
  background: white;
  border-radius: 2px;
  transition: all var(--transition-speed);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(9px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-9px);
}

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  animation: fadeIn 0.3s ease-out;
}

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

.modal-content {
  background: var(--bg-secondary);
  border: 2px solid var(--accent-cyan);
  border-radius: 20px;
  padding: 40px;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: slideUp 0.4s ease-out;
  box-shadow: 0 0 50px rgba(0, 212, 255, 0.5);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--bg-tertiary);
  border: none;
  color: var(--text-primary);
  font-size: 32px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-speed);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.modal-close:hover {
  background: var(--accent-cyan);
  transform: rotate(90deg);
  box-shadow: var(--shadow-glow);
}

.career-modal-header {
  margin-bottom: 30px;
}

.career-modal-title {
  font-size: 36px;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}

.career-modal-salary {
  font-size: 28px;
  color: var(--accent-teal);
  font-weight: 700;
  margin-bottom: 20px;
}

.career-modal-section {
  margin: 30px 0;
}

.career-modal-section h3 {
  font-size: 24px;
  color: var(--accent-cyan);
  margin-bottom: 15px;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 10px;
}

.career-modal-section p,
.career-modal-section li {
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 10px 0;
}

.career-modal-section ul {
  list-style: none;
  padding-left: 0;
}

.career-modal-section li::before {
  content: '✓';
  color: var(--accent-cyan);
  font-weight: bold;
  margin-right: 10px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 15px;
}

.skill-tag {
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: white;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
}

.resource-page {
  padding: 20px 0;
}

.back-button {
  padding: 12px 24px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  margin-bottom: 30px;
  transition: all var(--transition-speed);
}

.back-button:hover {
  background: var(--accent-cyan);
  color: white;
  transform: translateX(-5px);
  box-shadow: var(--shadow-glow);
}

.filter-bar {
  display: flex;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
  align-items: center;
}

.search-input {
  flex: 1;
  min-width: 250px;
  padding: 14px 20px;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 16px;
  transition: all var(--transition-speed);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.filter-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 20px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition-speed);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 30px;
}

.video-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: all var(--transition-speed);
}

.video-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent-cyan);
}

.video-thumbnail {
  width: 100%;
  height: 200px;
  background: var(--bg-tertiary);
  position: relative;
}

.video-thumbnail iframe {
  width: 100%;
  height: 100%;
}

.video-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  font-size: 24px;
  color: var(--text-muted);
}

.video-info {
  padding: 20px;
}

.video-info h3 {
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.video-info p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 15px;
}

.video-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 15px;
}

.badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.badge.free {
  background: linear-gradient(135deg, #00c853, #00e676);
  color: white;
}

.badge.paid {
  background: linear-gradient(135deg, #ffa726, #ff6f00);
  color: white;
}

.badge.beginner {
  background: var(--bg-tertiary);
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}

.badge.advanced {
  background: var(--bg-tertiary);
  color: var(--accent-teal);
  border: 1px solid var(--accent-teal);
}

.bookmark-btn {
  width: 100%;
  padding: 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 14px;
  transition: all var(--transition-speed);
}

.bookmark-btn:hover,
.bookmark-btn.bookmarked {
  background: linear-gradient(135deg, #ffd700, #ffed4e);
  color: #000;
  border-color: #ffd700;
  transform: scale(1.05);
}

.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
}

.doc-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  transition: all var(--transition-speed);
}

.doc-card:hover {
  transform: translateY(-8px) rotateY(5deg);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent-cyan);
}

.doc-icon {
  font-size: 64px;
  margin-bottom: 20px;
  display: inline-block;
  animation: float 3s ease-in-out infinite;
}

.doc-card h3 {
  font-size: 22px;
  color: var(--text-primary);
  margin-bottom: 15px;
}

.doc-card p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.doc-link {
  display: inline-block;
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: all var(--transition-speed);
}

.doc-link:hover {
  transform: translateX(5px);
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
}

.labs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 30px;
}

.lab-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 30px;
  transition: all var(--transition-speed);
}

.lab-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent-cyan);
}

.lab-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 15px;
  gap: 15px;
}

.lab-header h3 {
  font-size: 20px;
  color: var(--text-primary);
  flex: 1;
}

.difficulty {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.difficulty.easy {
  background: linear-gradient(135deg, #00c853, #00e676);
  color: white;
}

.difficulty.medium {
  background: linear-gradient(135deg, #ffa726, #ff6f00);
  color: white;
}

.difficulty.hard {
  background: linear-gradient(135deg, #e53935, #c62828);
  color: white;
}

.lab-card p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.lab-stats {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  color: var(--text-muted);
  font-size: 14px;
}

.lab-btn {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.lab-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

.news-grid {
  display: grid;
  gap: 30px;
}

.news-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 30px;
  position: relative;
  transition: all var(--transition-speed);
}

.news-card:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent-cyan);
}

.news-card.featured {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.news-tag {
  position: absolute;
  top: 15px;
  right: 15px;
  padding: 6px 14px;
  background: var(--accent-cyan);
  color: white;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
}

.news-card h3 {
  font-size: 24px;
  color: var(--text-primary);
  margin-bottom: 15px;
}

.news-card p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.news-meta {
  display: flex;
  gap: 20px;
  color: var(--text-muted);
  font-size: 14px;
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .videos-grid,
  .docs-grid,
  .labs-grid {
    grid-template-columns: 1fr;
  }

  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .search-input {
    width: 100%;
  }

  .modal-content {
    max-width: 90%;
    padding: 30px 20px;
  }

  .career-modal-title {
    font-size: 28px;
  }
}