body {
      background-color: #ffffff;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    main {
      flex: 1;
      padding-bottom: 80px;
    }

    .navbar-brand {
      color: #406d96 !important;
      font-weight: 700;
    }

    .btn-primary {
      background-color: #406d96 !important;
      border-color: #406d96 !important;
    }

    footer {
      background-color: #406d96;
      color: white;
      margin-top: auto;
      padding: 2rem 0;
    }
    
    .svg-background {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      opacity: 0.25;
      width: 100%;
      max-width: 790px;
      z-index: 0;
      pointer-events: none;
      filter: drop-shadow(0 0 10px rgba(0,0,0,0.05));
    }


    footer a {
      color: white;
      margin: 0 0.5rem;
      font-size: 1.25rem;
    }

    .whatsapp-fixed {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      background: #25D366;
      color: white;
      border: none;
      border-radius: 50px;
      padding: 0.75rem 1.5rem;
      font-size: 1rem;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .whatsapp-fixed:hover {
      transform: scale(1.05);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
    }

    .card-obra {
      border: none;
      border-radius: 12px;
      transition: transform 0.2s;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
      height: 100%;
    }

    .card-obra:hover {
      transform: translateY(-5px);
    }

    .card-img-container {
      height: 150px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 1rem;
      background: #f8f9fa;
      border-radius: 12px 12px 0 0;
    }

    .card-img-loader {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
      transition: opacity 0.3s ease;
    }

    .card-title {
      color: #406d96;
      font-weight: 600;
      min-height: 60px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      margin: 0;
      padding: 1rem;
    }

    #busquedaObra {
      border-radius: 8px;
      border: 2px solid #406d96;
      max-width: 500px;
      margin: 2rem auto;
      padding: 0.8rem 1.5rem;
    }

    .placeholder-icon {
      font-size: 3rem;
      color: #406d96;
      opacity: 0.7;
    }

    @media (max-width: 768px) {
      .navbar-nav {
        margin-top: 1rem;
      }
      
      .nav-item .btn {
        width: 100%;
        margin-bottom: 0.5rem;
      }

      #busquedaObra {
        width: 90%;
      }
    }