header {
      background-color: #1e293b;
      color: white;
      padding: 2rem;
      text-align: center;
    }
    header h1 {
      margin: 0;
      font-size: 2.5rem;
      
    }
    header p {
      font-size: 1.2rem;
      margin-top: 0.5rem;
    }

    .app-header {
      background-color: #1e293b;
      color: white;
      text-align: center;
      padding: 2rem;
    }

    .logo {
      width: 120px;
      height: 120px;
      margin-bottom: 1rem;
      object-fit: contain;
    }

    .text-block h1 {
      margin: 0;
      font-size: 2.5rem;
    }

    .text-block p {
      font-size: 1.2rem;
      margin-top: 0.5rem;
    }

    
    .section2 {
      max-width: 960px;
      margin: 2rem auto;
      padding: 0 1rem;
      color: white;
      line-height: 1.8;
    }
    .section2 h2 {
      font-size: 2rem;
      border-left: 4px solid #3b82f6;
      padding-left: 1rem;
      margin-bottom: 1rem;
    }

    .features2 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 1.5rem;
    }
    .feature2 {
      background-color: #1e293b;
      border-radius: 12px;
      padding: 1.5rem;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
      line-height: 1.8;
    }
    .features2 h3 {
      margin-top: 0;
      color: white;
    }

    .image-placeholder {
      margin-bottom: 1rem;
      width: 100%;
      height: auto;
      background-color: #1A3D4F;
      border-radius: 8px;
      display: flex;
      flex-direction: column; /* ⬅️ 세로 방향 정렬 */
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      color: white;
      margin: 1rem 0;
      padding: 0.5rem;
    }

    .download {
      text-align: center;
      margin-top: 3rem;
    }
    .download a {
      display: inline-block;
      padding: 1rem 2rem;
      background-color: #3b82f6;
      color: white;
      border-radius: 8px;
      font-size: 1.1rem;
      text-decoration: none;
      transition: background-color 0.3s;
      margin: 0.5rem 0.5rem; /* 버튼 간격 */
    }
    .download a:hover {
      background-color: #2563eb;
    }