/* ============ MAIN CONTENT AREA ============ */
    .main-content {
      flex: 1;
      background: #F4F4F7;
      position: relative;
      background: white;
      padding: 40px;
      border-radius: 16px;
      box-shadow: 0px 8px 25px rgba(0, 0, 0, 0.08);
      position: relative;
      z-index: 2;
      border: 1px solid rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(20px);
      margin-right: 0.75rem;
    }

    .main-content::before {
      content: '';
      position: fixed;
      top: 10%;
      right: 5%;
      width: 100px;
      height: 100px;
      background: radial-gradient(circle, rgba(68, 215, 182, 0.03) 0%, transparent 70%);
      border-radius: 50%;
      animation: float 6s ease-in-out infinite;
      pointer-events: none;
      z-index: 1;
    }

    .main-content::after {
      content: '';
      position: fixed;
      bottom: 15%;
      right: 10%;
      width: 60px;
      height: 60px;
      background: radial-gradient(circle, rgba(31, 58, 101, 0.02) 0%, transparent 70%);
      border-radius: 50%;
      animation: float 8s ease-in-out infinite reverse;
      pointer-events: none;
      z-index: 1;
    }

    @keyframes float {

      0%,
      100% {
        transform: translateY(0px) rotate(0deg);
      }

      50% {
        transform: translateY(-20px) rotate(180deg);
      }
    }


    /* Content Body */
    .content-body {
      max-width: 1100px;
    }

    .content-container {
      max-width: 1100px;
      background: white;
      padding: 40px;
      border-radius: 16px;
      box-shadow: 0px 8px 25px rgba(0, 0, 0, 0.08);
      position: relative;
      z-index: 2;
      border: 1px solid rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(20px);
    }

    .content-container::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent 0%, rgba(68, 215, 182, 0.3) 50%, transparent 100%);
    }

    /* Hero Section */
    .hero-section {
      text-align: center;
      margin-bottom: 64px;
      padding: 48px 0;
      position: relative;
      overflow: hidden;
    }

    .hero-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: radial-gradient(ellipse 80% 50% at 50% 20%, rgba(68, 215, 182, 0.08) 0%, transparent 50%);
      pointer-events: none;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, rgba(68, 215, 182, 0.15) 0%, rgba(31, 58, 101, 0.08) 100%);
      border: 1px solid rgba(68, 215, 182, 0.3);
      border-radius: 50px;
      padding: 10px 24px;
      font-size: 14px;
      font-weight: 600;
      color: #1F3A65;
      margin-bottom: 32px;
      position: relative;
      z-index: 1;
      transition: all 0.3s ease;
      backdrop-filter: blur(10px);
    }

    .hero-badge:hover {
      transform: translateY(-2px);
      box-shadow: 0px 8px 25px rgba(68, 215, 182, 0.2);
      border-color: rgba(68, 215, 182, 0.4);
    }

    .hero-badge i {
      color: #44D7B6;
      animation: sparkle 2s ease-in-out infinite;
    }

    @keyframes sparkle {

      0%,
      100% {
        transform: scale(1);
        opacity: 1;
      }

      50% {
        transform: scale(1.2);
        opacity: 0.8;
      }
    }

    .hero-title {
      font-size: 48px;
      font-weight: 700;
      color: #1F3A65;
      line-height: 1.2;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #1F3A65 0%, #44D7B6 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-description {
      font-size: 20px;
      color: #666;
      line-height: 1.6;
      margin-bottom: 32px;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 28px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      font-size: 16px;
      transition: all 0.3s ease;
      cursor: pointer;
      border: none;
    }

    .btn-primary {
      background: #1F3A65;
      color: white;
      box-shadow: 0px 4px 12px rgba(31, 58, 101, 0.3);
    }

    .btn-primary:hover {
      background: #173058;
      transform: translateY(-2px);
      box-shadow: 0px 6px 20px rgba(31, 58, 101, 0.4);
    }

    .btn-secondary {
      background: rgba(68, 215, 182, 0.1);
      color: #1F3A65;
      border: 1px solid rgba(68, 215, 182, 0.3);
    }

    .btn-secondary:hover {
      background: rgba(68, 215, 182, 0.2);
      transform: translateY(-2px);
    }

    /* Video Section */
    .video-section {
      background: linear-gradient(135deg, rgba(68, 215, 182, 0.05) 0%, rgba(31, 58, 101, 0.02) 100%);
      border-radius: 16px;
      padding: 48px;
      margin: 48px 0;
      text-align: center;
      border: 1px solid rgba(68, 215, 182, 0.1);
    }

    .video-container {
      position: relative;
      width: 100%;
      max-width: 800px;
      margin: 0 auto;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0px 12px 40px rgba(0, 0, 0, 0.15);
    }

    .video-placeholder {
      aspect-ratio: 16/9;
      background: linear-gradient(135deg, #1F3A65 0%, #44D7B6 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 24px;
      font-weight: 600;
      position: relative;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .video-placeholder:hover {
      transform: scale(1.02);
    }

    .play-button {
      position: absolute;
      width: 80px;
      height: 80px;
      background: rgba(255, 255, 255, 0.9);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #1F3A65;
      font-size: 32px;
      transition: all 0.3s ease;
    }

    .video-placeholder:hover .play-button {
      background: white;
      transform: scale(1.1);
    }

    .video-title {
      font-size: 28px;
      font-weight: 700;
      color: #1F3A65;
      margin-bottom: 12px;
    }

    .video-description {
      font-size: 16px;
      color: #666;
      margin-bottom: 32px;
    }

    /* Feature Grid */
    .features-section {
      margin: 64px 0;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: #1F3A65;
      text-align: center;
      margin-bottom: 16px;
    }

    .section-subtitle {
      font-size: 18px;
      color: #666;
      text-align: center;
      margin-bottom: 48px;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 32px;
      margin: 48px 0;
    }

    .feature-card {
      background: white;
      border: 1px solid rgba(0, 0, 0, 0.08);
      border-radius: 16px;
      padding: 32px;
      transition: all 0.4s ease;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(135deg, #44D7B6 0%, #1F3A65 100%);
      transform: scaleX(0);
      transition: transform 0.4s ease;
    }

    .feature-card:hover {
      transform: translateY(-8px);
      box-shadow: 0px 20px 60px rgba(0, 0, 0, 0.1);
      border-color: rgba(68, 215, 182, 0.2);
    }

    .feature-card:hover::before {
      transform: scaleX(1);
    }

    .feature-icon {
      width: 64px;
      height: 64px;
      background: linear-gradient(135deg, #44D7B6 0%, #1F3A65 100%);
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
      color: white;
      margin-bottom: 24px;
      box-shadow: 0px 8px 24px rgba(68, 215, 182, 0.3);
    }

    .feature-title {
      font-size: 22px;
      font-weight: 700;
      color: #1F3A65;
      margin-bottom: 12px;
    }

    .feature-description {
      font-size: 16px;
      color: #666;
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .feature-link {
      color: #44D7B6;
      text-decoration: none;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: all 0.3s ease;
    }

    .feature-link:hover {
      color: #1F3A65;
      transform: translateX(4px);
    }

    /* Stats Section */
    .stats-section {
      background: linear-gradient(135deg, #1F3A65 0%, #44D7B6 100%);
      border-radius: 16px;
      padding: 48px;
      margin: 64px 0;
      color: white;
      text-align: center;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 40px;
      margin-top: 40px;
    }

    .stat-item {
      text-align: center;
    }

    .stat-number {
      font-size: 48px;
      font-weight: 700;
      margin-bottom: 8px;
      background: rgba(255, 255, 255, 0.9);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .stat-label {
      font-size: 16px;
      opacity: 0.9;
      font-weight: 500;
    }

    /* Code Block */
    .code-section {
      margin: 64px 0;
    }

    .code-container {
      background: #1a1a1a;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0px 12px 40px rgba(0, 0, 0, 0.15);
    }

    .code-header {
      background: #2d2d2d;
      padding: 16px 24px;
      display: flex;
      align-items: center;
      gap: 8px;
      border-bottom: 1px solid #404040;
    }

    .code-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
    }

    .code-dot:nth-child(1) {
      background: #ff5f57;
    }

    .code-dot:nth-child(2) {
      background: #ffbd2e;
    }

    .code-dot:nth-child(3) {
      background: #28ca42;
    }

    .code-title {
      color: #fff;
      font-size: 14px;
      font-weight: 500;
      margin-left: 12px;
    }

    .code-content {
      padding: 24px;
      font-family: 'JetBrains Mono', 'Fira Code', monospace;
      font-size: 14px;
      line-height: 1.6;
      color: #e6e6e6;
      overflow-x: auto;
    }

    .code-comment {
      color: #6a9955;
    }

    .code-keyword {
      color: #569cd6;
    }

    .code-string {
      color: #ce9178;
    }

    .code-function {
      color: #dcdcaa;
    }




    /* CTA Section */
    .cta-section {
      background: linear-gradient(135deg, rgba(68, 215, 182, 0.1) 0%, rgba(31, 58, 101, 0.05) 100%);
      border-radius: 16px;
      padding: 48px;
      text-align: center;
      margin: 64px 0;
      border: 1px solid rgba(68, 215, 182, 0.2);
    }

    .cta-title {
      font-size: 32px;
      font-weight: 700;
      color: #1F3A65;
      margin-bottom: 16px;
    }

    .cta-description {
      font-size: 18px;
      color: #666;
      margin-bottom: 32px;
      max-width: 500px;
      margin-left: auto;
      margin-right: auto;
    }

    /* ============ RESPONSIVE DESIGN ============ */
    @media (max-width: 768px) {
      .sidebar {
        transform: translateX(-100%);
        width: 100%;
      }

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

      .main-content {
        margin-left: 0px !important;
        margin-right: 0px !important;
      }

      .mobile-toggle {
        display: block;
      }

      .content-body {
        padding: 24px;
      }

      .content-container {
        padding: 32px 24px;
      }

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

      .hero-description {
        font-size: 18px;
      }

      .hero-buttons {
        flex-direction: column;
        align-items: center;
      }

      .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }

      .video-section {
        padding: 32px 24px;
      }
    }

    @media (max-width: 480px) {
      .content-body {
        padding: 20px;
      }

      .content-container {
        padding: 24px 20px;
      }

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

    }
    
    @media (min-width: 1025px) {
  .main-content {
    margin-left: calc(260px + 40px); /* default sidebar width + spacing */
  }
}

@media (max-width: 1024px) {
  .main-content {
    margin-left: 0;
  }
}