:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e67e22;
    --bg-light: #f8f9fa;
    --text-color: #333;
    --border-color: #ddd;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    margin: 0;
    padding: 0;
    background-color: #fff;
}
ul { list-style: none; padding: 0; }
nav {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo { font-size: 1.5rem; font-weight: bold; color: white; }
.nav-links { display: flex; gap: 20px; }
a { color: var(--secondary-color) font-weight: 500; text-decoration: none;  }
a:hover { color: var(--accent-color); }
.card a { text-decoration: none; color: var(--secondary-color); transition: color 0.2s; }
.card a:hover { color: var(--accent-color); }
.learning-list a { text-decoration: none; color: white; transition: color 0.2s; background: var(--primary-color); border: 1px solid black;padding: 5px 10px; border-radius: 12px }
.learning-list a:hover { color: var(--accent-color); }
.note a { text-decoration: none; color: var(--secondary-color); transition: color 0.2s; }
.note a:hover { color: var(--accent-color); }
.container { max-width: 1000px; margin: 0 auto; padding: 2rem; }
section { margin-bottom: 4rem; scroll-margin-top: 80px; }
h1, h2, h3 { color: var(--primary-color); }
.intro {
    text-align: center;
    padding: 3rem 1rem;
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}
.intro p { font-size: 1.1rem; max-width: 800px; margin: 1rem auto; }
section {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-left: 5px solid var(--accent-color);
}
.toolkit-header { display: flex; align-items: center; gap: 10px; margin-bottom: 1rem; }
.toolkit-links { margin-top: 1.5rem; display: flex; gap: 15px; }
.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 4px;
    font-weight: bold;
}
.btn:hover { background-color: var(--secondary-color); color: white; }
.demo-gif { margin-top: 20px; max-width: 100%; border-radius: 8px; border: 1px solid #ccc; }
.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}
.card {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    background: var(--bg-light);
    transition: transform 0.2s;
    position: relative; padding-top: 30px;margin-top:30px
}
.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.card h3 {
    margin-top: 10px;
    font-size: 1.1rem;
}
.tag {
    display: inline-block;
    font-size: 0.7rem;
    padding: 2px 4px;
    border-radius: 8px;
    background: #e2e6ea;
    color: #555;
    float:right;
    margin-top:3px;
}
.learning-list { display: flex; flex-direction: column; margin-left: 15px; margin-right: 15px; gap:8px}
footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}
footer a { color: var(--secondary-color); }
@media (max-width: 768px) {
    .nav-links { display: none; }
    .toolkit-links { flex-direction: column; }
}
<style>
  .mammoth-tabs {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    max-width: 800px;
    margin-top:40px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 6px;
    overflow: hidden;
  }
  .tab-nav {
    background: #f4f4f4;
    border-bottom: 1px solid #ddd;
    overflow: hidden;
  }
  .tab-btn {
    background: inherit;
    float: left;
    border: none;
    outline: none;
    cursor: pointer;
    padding: 14px 24px;
    transition: 0.3s;
    font-size: 16px;
    color: #555;
    font-weight: 500;
    width: 200px;
    text-align: left;
  }
  .tab-btn:hover {
    background-color: #e0e0e0;
    color: #000;
  }
  .tab-btn.active {
    background-color: #fff;
    color: #000;
    border-bottom: 2px solid #fff; /* Hides the border to merge with content */
    font-weight: bold;
    margin-bottom: -1px;
  }
  .tab-content {
    display: none;
    padding-left: 5px;
    padding-right: 5px;
    background-color: #fff;
    animation: fadeEffect 0.4s;
  }
  .tab-content.active {
    display: block;
  }
  @keyframes fadeEffect {
    from {opacity: 0;}
    to {opacity: 1;}
  }
  .instruction-text {
    line-height: 1.6;
    margin-bottom: 15px;
  }
  .instruction-list {
    margin-bottom: 15px;
    padding-left: 20px;
  }
  .code-block {
    background: #2d2d2d;
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    white-space: pre-wrap;
    margin-bottom: 15px;
    overflow-x: auto;
  }
  .note {
    background: #f9f9dd;
    border: 1px solid #ccb;
    padding: 10px;
    padding-bottom: 0px;
    padding-top: 0px;
    margin: 15px 0;
    font-size: 0.9em;
    color: #555;
  }
  .tab-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    text-align: right;
  }
  .btn-github {
    display: inline-block;
    padding: 10px 20px;
    background-color: #24292e;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
  }
  .btn-github:hover {
    background-color: #444d56;
  }