/* ============ MAIN CONTENT AREA ============ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  line-height: 1.6;
  font-size: 16px;
}
    .main-content {
      flex: 1;
      margin-left: 300px;
      background: #F4F4F7;
      position: relative;
    }
    .login-article{
      margin-left: 300px;
    }

    /* Content Body */
    .content-body {
      padding: 40px;
    }

    .content-container {
      max-width: 800px;
      margin: 0 auto;
      background: white;
      padding: 60px;
      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%);
    }

    /* Article Styles */
    .article-header {
      text-align: center;
      margin-bottom: 48px;
      padding-bottom: 32px;
      border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    }

    .article-meta {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 24px;
      margin-bottom: 24px;
      font-size: 14px;
      color: #666;
    }

    .meta-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .meta-item i {
      color: #44D7B6;
      font-size: 16px;
    }

    .article-title {
      font-size: 42px;
      font-weight: 700;
      color: #1F3A65;
      line-height: 1.2;
      margin-bottom: 16px;
      background: linear-gradient(135deg, #1F3A65 0%, #44D7B6 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .article-subtitle {
      font-size: 20px;
      color: #666;
      font-weight: 400;
      line-height: 1.5;
      max-width: 600px;
      margin: 0 auto;
    }

    /* Article Content */
    .article-content {
      font-size: 17px;
      line-height: 1.8;
      color: #333D4B;
    }

    .article-content h1 {
      font-size: 36px;
      font-weight: 700;
      color: #1F3A65;
      margin: 48px 0 24px 0;
      line-height: 1.3;
      position: relative;
      padding-left: 20px;
    }

    .article-content h1::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 4px;
      background: linear-gradient(135deg, #44D7B6 0%, #1F3A65 100%);
      border-radius: 2px;
    }

    .article-content h2 {
      font-size: 28px;
      font-weight: 700;
      color: #1F3A65;
      margin: 40px 0 20px 0;
      line-height: 1.4;
      position: relative;
      padding-left: 16px;
    }

    .article-content h2::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 3px;
      background: #44D7B6;
      border-radius: 2px;
    }

    .article-content h3 {
      font-size: 22px;
      font-weight: 600;
      color: #1F3A65;
      margin: 32px 0 16px 0;
      line-height: 1.4;
    }

    .article-content h4 {
      font-size: 18px;
      font-weight: 600;
      color: #333D4B;
      margin: 24px 0 12px 0;
    }

    .article-content p {
      margin-bottom: 20px;
      text-align: justify;
    }

    .article-content ul,
    .article-content ol {
      margin: 20px 0;
      padding-left: 32px;
    }

    .article-content li {
      margin-bottom: 8px;
      line-height: 1.7;
    }

    .article-content li::marker {
      color: #44D7B6;
      font-weight: 600;
    }

    /* Step Boxes */
    .step-box {
      background: linear-gradient(135deg, rgba(68, 215, 182, 0.05) 0%, rgba(31, 58, 101, 0.02) 100%);
      border: 1px solid rgba(68, 215, 182, 0.2);
      border-radius: 12px;
      padding: 24px;
      margin: 32px 0;
      position: relative;
    }

    .step-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }

    .step-number {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, #44D7B6 0%, #1F3A65 100%);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 700;
      font-size: 16px;
      flex-shrink: 0;
    }

    .step-title {
      font-size: 20px;
      font-weight: 700;
      color: #1F3A65;
      margin: 0;
    }

    .step-content {
      font-size: 16px;
      line-height: 1.7;
      color: #666;
    }

    /* Code Blocks */
    .code-block {
      background: #1a1a1a;
      border-radius: 12px;
      overflow: hidden;
      margin: 32px 0;
      box-shadow: 0px 8px 25px 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;
    }

    /* Info Boxes */
    .info-box {
      border-radius: 12px;
      padding: 20px 24px;
      margin: 24px 0;
      border-left: 4px solid;
      position: relative;
    }

    .info-box.tip {
      background: rgba(68, 215, 182, 0.05);
      border-color: #44D7B6;
      color: #1F3A65;
    }

    .info-box.warning {
      background: rgba(255, 193, 7, 0.05);
      border-color: #ffc107;
      color: #856404;
    }

    .info-box.note {
      background: rgba(31, 58, 101, 0.05);
      border-color: #1F3A65;
      color: #1F3A65;
    }

    .info-box-title {
      font-weight: 700;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 16px;
    }

    .info-box-content {
      font-size: 15px;
      line-height: 1.6;
    }

    /* Images */
    .article-image {
      width: 100%;
      border-radius: 12px;
      margin: 24px 0 8px 0;
      box-shadow: 0px 8px 25px rgba(0, 0, 0, 0.1);
      border: 1px solid rgba(0, 0, 0, 0.08);
      transition: all 0.3s ease;
      cursor: pointer;
    }

    .article-image:hover {
      transform: scale(1.02);
      box-shadow: 0px 12px 35px rgba(0, 0, 0, 0.15);
    }

    .screenshot-container {
      margin: 32px 0;
      text-align: center;
    }

    .image-caption {
      text-align: center;
      font-size: 14px;
      color: #666;
      margin: 12px 0 8px 0;
      font-style: italic;
      font-weight: 500;
    }

    /* Video Container */
    .video-container {
      margin: 32px 0;
      text-align: center;
    }

    .video-wrapper {
      position: relative;
      width: 100%;
      max-width: 700px;
      margin: 0 auto 12px;
      border-radius: 16px;
      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;
      position: relative;
      cursor: pointer;
      transition: all 0.4s ease;
      overflow: hidden;
    }

    .video-placeholder::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: radial-gradient(circle at center, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .video-placeholder:hover::before {
      opacity: 1;
    }

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

    .play-button {
      position: absolute;
      width: 80px;
      height: 80px;
      background: rgba(255, 255, 255, 0.95);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #1F3A65;
      font-size: 32px;
      transition: all 0.4s ease;
      box-shadow: 0px 8px 25px rgba(0, 0, 0, 0.2);
      z-index: 2;
    }

    .video-placeholder:hover .play-button {
      background: white;
      transform: scale(1.15);
      box-shadow: 0px 12px 35px rgba(0, 0, 0, 0.3);
    }

    .video-info {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
      text-align: left;
      z-index: 2;
    }

    .video-info h4 {
      font-size: 22px;
      font-weight: 700;
      margin: 0 0 8px 0;
      color: white;
      text-shadow: 0px 2px 8px rgba(0, 0, 0, 0.3);
    }

    .video-info p {
      font-size: 16px;
      margin: 0;
      opacity: 0.9;
      color: white;
      text-shadow: 0px 1px 4px rgba(0, 0, 0, 0.3);
    }

    /* Video Overlay Effects */
    .video-placeholder::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 50%;
      background: linear-gradient(transparent 0%, rgba(0, 0, 0, 0.4) 100%);
      pointer-events: none;
    }

    /* Table of Contents */
    .toc {
      background: rgba(68, 215, 182, 0.05);
      border: 1px solid rgba(68, 215, 182, 0.2);
      border-radius: 12px;
      padding: 24px;
      margin: 32px 0;
    }

    .toc-title {
      font-size: 18px;
      font-weight: 700;
      color: #1F3A65;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .toc-list {
      list-style: none;
      padding: 0;
    }

    .toc-item {
      margin-bottom: 8px;
    }

    .toc-link {
      color: #666;
      text-decoration: none;
      font-size: 15px;
      transition: all 0.3s ease;
      display: block;
      padding: 4px 0;
    }

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

    /* Article Footer */
    .article-footer {
      margin-top: 64px;
      padding-top: 32px;
      border-top: 1px solid rgba(0, 0, 0, 0.08);
      text-align: center;
    }

    .article-tags {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
      margin-bottom: 24px;
    }

    .tag {
      background: rgba(68, 215, 182, 0.1);
      color: #1F3A65;
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 500;
      border: 1px solid rgba(68, 215, 182, 0.2);
    }

    .share-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-top: 24px;
    }

    .share-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      font-size: 18px;
      transition: all 0.3s ease;
    }

    .share-btn.twitter {
      background: rgba(29, 161, 242, 0.1);
      color: #1da1f2;
      border: 1px solid rgba(29, 161, 242, 0.2);
    }

    .share-btn.linkedin {
      background: rgba(0, 119, 181, 0.1);
      color: #0077b5;
      border: 1px solid rgba(0, 119, 181, 0.2);
    }

    .share-btn.facebook {
      background: rgba(24, 119, 242, 0.1);
      color: #1877f2;
      border: 1px solid rgba(24, 119, 242, 0.2);
    }

    .share-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0px 6px 20px rgba(0, 0, 0, 0.1);
    }

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

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

      .main-content {
        margin-left: 0;
      }

      .mobile-toggle {
        display: block;
      }

      .content-body {
        padding: 24px;
      }

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

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

      .article-subtitle {
        font-size: 18px;
      }

      .article-meta {
        flex-direction: column;
        gap: 12px;
      }

      .article-content h1 {
        font-size: 28px;
      }

      .article-content h2 {
        font-size: 24px;
      }

      .step-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }

      .share-buttons {
        gap: 12px;
      }
    }

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

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

      .article-title {
        font-size: 28px;
      }

      .article-content {
        font-size: 16px;
      }
    }