* {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: Arial, sans-serif;
      background: #f4f6fb;
      color: #222;
    }

    .container {
      max-width: 750px;
      margin: 0 auto;
      padding: 20px;
    }

    .card {
      background: #fff;
      border-radius: 18px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
      overflow: hidden;
      padding-bottom: 20px;
    }

    .banner {
      width: 100%;
      aspect-ratio: 3 / 2;
      max-height: 30vw;
      min-height: 140px;
      object-fit: cover;
      object-position: top;
      display: block;
    }

    h1 {
      margin: 20px 0 10px;
      color: #d40000;
      text-align: center;
      font-size: 34px;
      letter-spacing: 1px;
    }

    .subtitle {
      text-align: center;
      font-size: 18px;
      color: #666;
      margin: 0 20px 20px;
    }

    .btn-group {
      text-align: center;
      margin: 20px;
    }

    .btn {
      display: inline-block;
      padding: 12px 20px;
      margin: 5px;
      background: #004080;
      color: white;
      text-decoration: none;
      border-radius: 10px;
      font-weight: bold;
      cursor: pointer;
      border: none;
      font-size: 16px;
    }

    .btn-upload {
      background: #d40000;
    }

    .btn:hover {
      opacity: 0.85;
    }

    #gallery {
      display: none;
      padding: 20px;
      grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
      gap: 10px;
      background: #f9f9f9;
      border-top: 2px solid #eee;
      animation: fade 0.35s ease;
    }

    @keyframes fade {
      from {
        opacity: 0;
        transform: translateY(-6px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    #gallery img {
      width: 100%;
      height: 110px;
      object-fit: cover;
      border-radius: 5px;
      border: 1px solid #ccc;
    }

    .back {
      display: inline-block;
      margin: 22px auto 0;
      padding: 12px 22px;
      background: navy;
      color: white;
      text-decoration: none;
      border-radius: 10px;
      font-weight: bold;
      transition: 0.2s ease;
    }

    .back:hover {
      opacity: 0.85;
      transform: translateY(-1px);
    }

    .btn-wrap {
      text-align: center;
      padding-top: 10px;
    }

    @media (max-width: 600px) {
      .container {
        padding: 12px;
      }
      h1 {
        font-size: 28px;
      }
      .btn {
        width: 90%;
        margin-bottom: 10px;
      }
    }