* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  html, body {
    font-family: sans-serif;
    background: #f7f8fa;
    color: #222;
    min-height: 100vh;
  }
  
  .container {
    width: 90%;
    max-width: 1350px;
    margin: 0 auto;
    padding-bottom: 2rem;
  }
  
  .gym-header {
    background: rgba(226, 229, 233, 1);
    font-size: 2.2rem;
    font-weight: 800;
    padding: 2.5rem 0 2rem 0;
    text-align: center;
    margin: 0 0 2rem 0;
    border-radius: 0.5rem;
  }
  
  /* .on-heading {
    font-size: 2.2rem;
    color: #000000;
    font-weight: 800;
    letter-spacing: 1px;
  } */
  .on-heading::after {
    content: '';
    display: block;
    width: 130px;
    height: 5px;
    background-color:#e2b347;
    margin: 2px auto 0;
    border-radius: 4px;
  }
  
  .main-flex {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
  }
  
  aside {
    flex: 1 1 220px;
    max-width: 260px;
    min-width: 180px;
  }
  .gym-list {
    flex: 3 1 0;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    min-width: 0;
  }
  
  .gym-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.07);
    padding: 2rem 1.5rem 1.5rem 1.5rem;
    transition: box-shadow 0.2s;
    border-left: 6px solid #1976d2;
    min-width: 0;
  }
  
  .gym-card:hover {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
  }
  
  .gym-card h2 {
    font-size: 1.75rem;
    color: #002147;
    font-weight: 700;
    margin-bottom: 0.3rem;
  }
  .gym-card h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background-color:#e2b347;
    position: absolute;
    border-radius: 2px;
  }
  
  .gym-card p {
    font-size: 1.06rem;
    line-height: 1.7;
    color: #333;
    margin-bottom: 1.2rem;
  }
  
  .gym-img-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 1rem;
  }
  .gym-img-gallery img:first-child {
    grid-column: span 2;
  }
  
  .gym-img-gallery img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 1px 8px rgba(0,0,0,0.07);
    border: 1px solid #002147;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  .gym-img-gallery img.loaded {
    opacity: 1;
    transform: scale(1);
  }
  
  .gym-img-gallery img:hover {
    transform: scale(1.03);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
    z-index: 1;
  }
  
  @media (max-width: 1024px) {
    .main-flex {
      flex-direction: column;
    }
    aside {
      max-width: 100%;
      margin-bottom: 2rem;
    }
  }
  

@media (max-width: 600px) {
    .gym-img-gallery {
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }
    .gym-img-gallery img:first-child {
      grid-column: auto;
    }
  }