body {
    font-family: Arial, sans-serif;
    background: #f2f2f2;
}

.chat-box {
    width: 350px;
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
    overflow: hidden;
}

.chat-header {
    background: #2ecc71;
    color: #fff;
    padding: 12px;
    font-size: 16px;
    font-weight: bold;
}

.chat-header small {
    display: block;
    font-weight: normal;
    font-size: 12px;
}

.close {
    float: right;
    cursor: pointer;
}

form {
    padding: 15px;
}

input, textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
}

textarea {
    height: 80px;
    resize: none;
}

.btn-group {
    display: flex;
    gap: 10px;
}

.btn {
    flex: 1;
    padding: 10px;
    border: none;
    color: #fff;
    cursor: pointer;
    border-radius: 5px;
    font-size: 14px;
}

.web {
    background: #16a085;
}

.mobile {
    background: #2ecc71;
}