:root {
    --primary-blue:  #007bff;
    --accent-yellow: #ffc107;
    --bg-white:      #ffffff;
    --bg-light:      #f0f8ff;
  }
  
  body {
    font-family: 'Roboto', sans-serif;
    background: var(--bg-white);
    color: #333;
    scroll-behavior: smooth;
  }
  
  h1, h2, h5 {
    font-family: 'Playfair Display', serif;
  }
  
  /* Logo responsivo */
  .logo-img {
    height: 50px;
    max-height: 6vh;
  }
  
  .navbar {
    background: var(--primary-blue);
    transition: box-shadow 0.3s ease;
  }
  
  .navbar.scrolled {
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  }
  
  .navbar-brand img {
    height: 50px;
    margin-right: 8px;
  }
  
  .nav-link {
    color: var(--bg-white) !important;
  }
  
  .btn-accent {
    background: var(--accent-yellow);
    color: #000;
    transition: transform 0.3s, box-shadow 0.3s;
  }
  
  .btn-accent:hover {
    transform: scale(1.05);
    box-shadow: 0 0 8px var(--accent-yellow);
  }
  
  .hero {
    position: relative;
    padding: 60px 0;
    background: linear-gradient(135deg, var(--bg-light), var(--bg-white));
    overflow: hidden;
  }
  
  .hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("pattern-light.png");
    background-repeat: repeat;
    opacity: 0.1;
    pointer-events: none;
  }
  
  .hero .container {
    position: relative;
    z-index: 1;
  }
  
  .services,
  .gallery {
    padding: 60px 0;
  }
  
  .service-card {
    height: 280px;
    background-color: #000;
  }
  
  .service-card img {
    object-fit: cover;
    filter: brightness(70%);
    transition: transform 0.4s ease;
  }
  
  .service-card:hover img {
    transform: scale(1.05);
  }
  
  .service-overlay {
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    padding: 20px;
    z-index: 2;
    transition: background 0.3s ease;
  }
  
  .service-card:hover .service-overlay {
    background: rgba(0, 0, 0, 0.65);
  }
  
  .gallery img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 4px;
  }
  
  .footer {
    background: var(--primary-blue);
    color: var(--bg-white);
    padding: 40px 0;
  }
  
  .social-icons a {
    color: var(--bg-white);
    margin: 0 10px;
    font-size: 1.5rem;
    transition: color 0.3s;
  }
  
  .social-icons a:hover {
    color: var(--accent-yellow);
  }
  
  #backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--accent-yellow);
    color: var(--primary-blue);
    border: none;
    border-radius: 50%;
    width: 45px;
    height: 45px;
    font-size: 1.5rem;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    cursor: pointer;
    z-index: 999;
  }
  
  #backToTop:hover {
    opacity: 0.8;
  }
  
  /* 📱 Responsividad adicional */
  @media (max-width: 576px) {
    .hero h1 {
      font-size: 1.6rem;
    }
  
    .logo-img,
    .navbar-brand img {
      height: 40px;
    }
  
    .btn-accent {
      font-size: 0.9rem;
      padding: 8px 14px;
    }
  
    .service-overlay h5 {
      font-size: 1.1rem;
    }
  
    .service-overlay p {
      font-size: 0.9rem;
    }
  
    .service-card {
      height: 220px;
    }
  
    .gallery img {
      height: 160px;
    }
  
    #backToTop {
      bottom: 20px;
      right: 20px;
      width: 40px;
      height: 40px;
      font-size: 1.2rem;
    }
  
    .footer p,
    .footer h5 {
      font-size: 0.9rem;
    }
  }