h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: #2c3e50;
    text-align: center;
}

.definition-box {
    background-color: #e8f4fc;
    border-left: 5px solid #3498db;
    padding: 20px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
}

.operation-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-top: 4px solid #3498db;
    margin: 15px 0;
}
#bst-visualization {
    text-align: center;
    margin: 30px 0;
    padding: 15px;
    background-color: #f9f9f9;
    border-radius: 8px;
    border: 2px dashed #3498db;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
    padding: 20px;
}

header {
    background: #2c3e50;
    color: white;
    padding: 20px;
    text-align: center;
    margin-bottom: 20px;
}

h2 {
    color: #2c3e50;
    margin: 20px 0 15px;
    border-bottom: 2px solid #3498db;
    padding-bottom: 5px;
}

h3 {
    color: #3498db;
    margin: 15px 0 10px;
}

p {
    margin-bottom: 15px;
}

ul, ol {
    margin: 15px 0;
    padding-left: 30px;
}

li {
    margin-bottom: 8px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 15px auto;
    border: 1px solid #ddd;
    border-radius: 4px;
}

a {
    color: #3498db;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    background: #2c3e50;
    color: white;
}