body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#tabs-list button {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    margin-right: 1rem;
}

main {
    padding: 2rem;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1rem;
    position: fixed;
    bottom: 0;
    width: 100%;
}

.source-list {
    list-style-type: none;
    padding: 0;
}

.source-item {
    background-color: #fff;
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.source-item h3 {
    margin-top: 0;
}

.source-item .category {
    font-style: italic;
    color: #666;
}

.suggestion-form {
    max-width: 600px;
    margin: 0 auto;
}

.suggestion-form input,
.suggestion-form textarea {
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 1rem;
}

.suggestion-form button {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
}

.search-form {
    margin-bottom: 2rem;
}

.search-form input {
    width: 70%;
    padding: 0.5rem;
}

.search-form button {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
}