nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 0;
    margin: 0;
}

nav ul li a {
    display: block;
    color: #fff;
    padding: 12px 24px;
    font-size: 15px;
    transition: background 0.2s;
}

nav ul li a:hover,
nav ul li a.active {
    background-color: #388E3C;
}

.sidebar-block ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-block ul li {
    padding: 4px 0;
}

.news-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.news-list li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.news-list li:last-child {
    border-bottom: none;
}

.btn {
    display: inline-block;
    background-color: #FF9800;
    color: #fff;
    border: none;
    padding: 8px 18px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
}

.btn:hover {
    background-color: #F57C00;
}

.btn-green {
    background-color: #4CAF50;
}

.btn-green:hover {
    background-color: #388E3C;
}