body {
    font-family: sans-serif;
    margin: 0;
    background: #222;
    color: #fff;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hidden {
    display: none !important;
}

#login-screen {
    text-align: center;
}

#chat-screen {
    display: flex;
    width: 90vw;
    height: 90vh;
    background: #333;
    border-radius: 10px;
    overflow: hidden;
}

.sidebar {
    width: 30%;
    background: #2a2a2a;
    padding: 20px;
    border-right: 1px solid #444;
}

.chat-area {
    width: 70%;
    display: flex;
    flex-direction: column;
}

#messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 10px;
}

.input-area {
    padding: 20px;
    background: #2a2a2a;
    display: flex;
    gap: 10px;
}

input {
    min-width: 180px;
    padding: 10px;
    border-radius: 5px;
    border: none;
    flex: 1;
}

button {
    padding: 10px 20px;
    cursor: pointer;
    background: #007bff;
    border: none;
    color: white;
    border-radius: 5px;
}

.msg {
    padding: 10px;
    border-radius: 10px;
    max-width: 70%;
    word-wrap: break-word;
}

.msg.my {
    background: #0056b3;
    align-self: flex-end;
}

.msg.their {
    background: #444;
    align-self: flex-start;
}