.mpesa-calc-wrapper {
    max-width: 700px;
    margin: auto;
    padding: 20px;
    background-color: #000;
    border: 2px solid #1b8415;
    border-radius: 15px;
    box-shadow: 0 0 10px #1b8415;
    color: white;
    font-family: Arial, sans-serif;
}

.mpesa-calc-wrapper h2 {
    text-align: center;
    color: #1b8415;
    margin-bottom: 20px;
}

#mpesaAmount {
    width: 100%;
    padding: 10px;
    font-size: 1.1em;
    border-radius: 8px;
    border: 2px solid #1b8415;
    margin-bottom: 15px;
    background: #111;
    color: white;
}

.button-group {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 20px;
}

.button-group button {
    flex: 1;
    background-color: #1b8415;
    color: white;
    font-weight: bold;
    border: none;
    padding: 12px;
    font-size: 1em;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.button-group button:hover {
    background-color: #146c11;
}

#mpesaResult p {
    background: #111;
    border-left: 4px solid #1b8415;
    padding: 10px;
    margin: 10px 0;
    border-radius: 6px;
    font-size: 1em;
    color: white;
}

.mpesa-note {
    margin-top: 30px;
    font-size: 0.9em;
    color: #ccc;
    background-color: #111;
    border-top: 1px solid #1b8415;
    padding-top: 10px;
    line-height: 1.6em;
}