body {
    margin: 0;
    font-family: sans-serif;
    overflow: hidden;
}

.top {
    width: 100%;
    height: 30px;

    display: flex;
}
.top .web_name {
    margin: auto 0 auto 10px;
}

.main {
    position: fixed;
    display: flex;
    width: 100%;
    height: calc(100% - 30px);
}
.main .input_div {
    border: gray solid 2px;
    background-color: white;
    border-radius: 15px;
    position: fixed;

    display: flex;
    flex-direction: column;

    max-width: 800px;
    width: 90%;
    height: 80px;
    left: 50%;  /* Zentriert das Element horizontal */
    bottom: 50px;  /* Setzt es an den unteren Rand */
    transform: translateX(-50%);  /* Korrigiert die horizontale Zentrierung */
}
.main .input_div #message {
    margin: 5px;
    border: none;
    resize: none;
    height: 60px;

    font-family: sans-serif;
    font-size: 16px;
}
.main .input_div #message:focus {
    outline: none;
    border: none;
}
.main .input_div #message::placeholder{
    color: #bbb;
}

.main .input_div #submit {
    margin: 5px 10px 5px auto;
    width: 100px;
    height: 30px;
    border: none;
    border-radius: 15px;
    font-size: 16px;

    background-color: #ddd;
    font-family: sans-serif;
    color: #555;

    transition: width 200ms;
}
.main .input_div #submit:hover {
    cursor: pointer;
    width: 160px;

}
.main #chat_log {
    margin: 0 auto 140px auto;
    max-width: 1000px;
    width: 90%;
    
    display: flex;
    flex-direction: column;

    overflow-y: auto;
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;
}
.main #chat_log::-webkit-scrollbar {
    display: none;
}
.main #chat_log .m41d {
    margin: 5px auto 5px 5px;
    text-align: left;

    background-color: #eef;
    padding: 10px;
    border-radius: 10px;
}
.main #chat_log .user {
    margin: 5px 5px 5px auto;
    text-align: right;

    background-color: #eee;
    padding: 10px;
    border-radius: 10px;
}