body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    color: #343a40;
}
.wrapper {
    flex: 1;
}
header {
    background-color: #343a40;
    color: white;
    padding: 2rem 0;
    text-align: center;
}
nav {
    display: flex;
    justify-content: center;
    background-color: #495057;
}
nav a {
    color: white;
    padding: 1rem;
    text-decoration: none;
    text-transform: uppercase;
    transition: background-color 0.3s ease;
}
nav a:hover {
    background-color: #6c757d;
}
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}
.grid-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.category-card {
    background: #ffffff;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
}
.category-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}
.category-card h2 {
    color: #495057;
    margin-bottom: 1rem;
    border-bottom: 2px solid #dee2e6;
    padding-bottom: 0.5rem;
}
ul {
    list-style: none;
    padding: 0;
}
ul li {
    background: #e9ecef;
    margin: 0.5rem 0;
    padding: 0.75rem;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    display: flex;
    align-items: center;
}
ul li a {
    text-decoration: none;
    color: #495057;
    font-weight: bold;
    flex-grow: 1;
    font-size: 1.1rem;
}
ul li:hover {
    background: #dee2e6;
}
ul li a:hover {
    text-decoration: underline;
}
ul li .icon {
    background-color: #6c757d;
    border-radius: 50%;
    color: white;
    display: inline-block;
    height: 30px;
    margin-right: 10px;
    text-align: center;
    width: 30px;
    line-height: 30px;
}
footer {
    text-align: center;
    padding: 1rem 0;
    background: #343a40;
    color: white;
    margin-top: auto;
    border-top: 2px solid #495057;
}
@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: 1fr;
    }
}