body.dark {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0e0e0e;
    color: #fff;
}

.login-container {
    max-width: 320px;
    margin: 100px auto;
    padding: 20px;
    background: #1a1a1a;
    border-radius: 8px;
    text-align: center;
}

.login-container input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: none;
    border-radius: 6px;
}

.login-container button {
    width: 100%;
    padding: 12px;
    background: #00c853;
    border: none;
    color: #000;
    font-weight: bold;
    border-radius: 6px;
}

.top-bar {
    background: #111;
    padding: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.online { color: #00c853; }
.offline { color: #ff5252; }

.bottom-menu {
    position: fixed;
    bottom: 0;
    width: 100%;
    background: #111;
    display: flex;
}

.bottom-menu button {
    flex: 1;
    padding: 15px;
    background: none;
    border: none;
    color: #fff;
}