body {
      font-family: Arial, sans-serif;
      background-color: #ffffff;
      color: #333;
      max-width:1000px; margin:0 auto; padding:20px;
    }
    header {
      display: flex;
      justify-content: center;
      margin: 20px auto;
    }
    
    header img {
      height: 70px;
    }
    
    header a {
      text-decoration: none;
      display: flex;
      align-items:center;
      color: #333;
      gap: 2px;
    }
    
    main {
      padding: 20px;
    }

    img.feature{width:100%;height:auto;border-radius:8px;margin:12px 0;}

    .cta{background:#f0f8ff;border-left:4px solid #0073e6;padding:12px;border-radius:6px;margin:16px 0;}
    .note{background:#f7f7f7;border-left:4px solid #ddd;padding:12px;margin:12px 0;}
    .internal-links{background:#fbfeff;border:1px solid #e6f2ff;padding:12px;border-radius:6px;margin-top:20px;}
    .author-bio{background:#fff9f0;border:1px solid #ffe7c4;padding:14px;border-radius:8px;margin-top:24px;}
    ul{margin-left:1.05rem;}
    .faq{margin-top:20px;}
    .board {background:rgba(255, 217, 0, 0.208);padding:16px;border-radius:10px;margin:18px 0}

    footer {
      border-top: 1px solid #9f9f9f;
      padding: 20px;
      margin-top: 50px;
    }
    .footer-container {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
    }
    .footer-column {
      flex: 1 1 200px;
    }
    .footer-column h4 {
      margin-top: 0;
      margin-bottom: 10px;
      font-size: 1.1em;
    }
    .footer-column a {
      display: block;
      color: #333;
      text-decoration: none;
      margin-bottom: 5px;
    }
    .footer-column a:hover {
      text-decoration: underline;
    }
    .footer-text {
      margin-top: 50px;
      text-align: center;
      font-size: medium;
    }

 
.container { max-width: 960px; margin: auto; padding: 1rem; }
.nav-tabs { display: flex; overflow-x: auto; }
.nav-tab { flex: 1; padding: 0.8rem; cursor: pointer; border: none; background: none; border-bottom: 3px solid transparent; }
.nav-tab.active { border-bottom-color: #343434; font-weight: bold; }

.card { background: #fff; border-radius: .75rem; padding: 1.2rem; box-shadow: 0 2px 6px rgba(0,0,0,0.05); margin-bottom: 1rem; }
.label { display: block; font-weight: 600; margin-bottom: .4rem; }
.slider { width: 100%; margin-bottom: 30px;}
.diameter-display { display: flex; justify-content: space-between; font-size: .9rem; }
.ring-detail { margin-top: 20px;}

.ring-container { display: flex; flex-direction: column; align-items: center; }
.ring { border: 3px solid #343434; border-radius: 50%; transition: .2s; }

.size-grid { display: grid; gap: 1rem; grid-template-columns: repeat(3, 1fr); }
.size-card { text-align: center; border: 1px solid #eee; padding: .8rem; border-radius: .5rem; background: #fafafa; }

.conversion-list { display: grid; gap: .5rem; }
.conversion-item { display: flex; justify-content: space-between; background: #f9fafb; padding: .5rem .8rem; border-radius: .5rem; }

.size-table { width: 100%; border-collapse: collapse; }
.size-table th, .size-table td { border: 1px solid #eee; padding: .4rem; text-align: center; }
.size-table th { background: #343434; color: #fff; }

.tab-content { display: none; }
.tab-content.active { display: block; }

.contact-form {
  text-align: center;
}

.blog {
    margin: 80px auto;
}

.blog-list {
          list-style: none;
          padding: 0;
          display: flex;
          flex-direction: column;
          align-items: center;
          gap: 20px;
        }
      
        .blog-list li {
          width: 100%;
          max-width: 280px;
        }
      
        .blog-list a {
          display: block;
          text-decoration: none;
          padding: 12px 18px;
          color: #000;
          background-color: rgba(255, 217, 0, 0.208);
          border-radius: 8px;
          transition: all 0.3s ease-in-out;
          box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
      
        .blog-list a:hover {
          transform: translateY(-2px);
          box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }    

        table {
      width: 100%;
      border-collapse: collapse;
      margin: 15px 0;
    }
    table, th, td {
      border: 1px solid #ccc;
      text-align: center;
      padding: 8px;
    }
    th {
      background: #f4f4f4;
    }