body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
}

.container {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.full-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

.logout {
    position: absolute;
    top: 10px;
    right: 20px;
    color: #fff;
    background: rgba(0, 0, 0, 0.7);
    padding: 5px 10px;
    border-radius: 4px;
    text-decoration: none;
    z-index: 3;
}

.chat-icon {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #007bff;
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 24px;
    z-index: 3;
}

.chat-box {
    position: fixed;
    bottom: 80px;
    right: 20px;
    width: 350px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    z-index: 3;
}

.chat-header {
    background: #007bff;
    color: #fff;
    padding: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 8px 8px 0 0;
}

.chat-header h3 {
    margin: 0;
}

.chat-header span {
    cursor: pointer;
}

.chat-content {
    padding: 15px;
    max-height: 300px;
    overflow-y: auto;
}

.chat-content h4 {
    margin: 0 0 10px;
}

.navigation {
    margin-top: 15px;
    display: flex;
    gap: 10px;
}

.nav-button {
    padding: 8px 15px;
    background: #333;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
}

.nav-button.disabled {
    background: #ccc;
    cursor: not-allowed;
}

.auth-container {
    max-width: 400px;
    margin: 50px auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.auth-container input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.auth-container button {
    width: 100%;
    padding: 10px;
    background: #007bff;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.error {
    color: red;
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .chat-box {
        width: 90%;
        right: 5%;
        bottom: 70px;
    }

    .chat-icon {
        bottom: 15px;
        right: 15px;
    }
}