body {
    background: #f5f5f5;
    font-family: Arial, sans-serif;
}

.container {
    width: 65%;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
}

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

.thread {
    border-bottom: 1px solid #ddd;
    padding: 15px 0;
}

.comment {
    background: #f0f0f0;
    padding: 10px;
    margin: 10px 0;
}

input, textarea {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
}

.btn {
    background: #000;
    color: #fff;
    padding: 8px 15px;
    border: none;
    cursor: pointer;
    text-decoration: none;
}