* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background: linear-gradient(135deg, #25D366, #128C7E);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.title {
    text-align: center;
    font-size: 30px;
    font-weight: bold;
    color: #128C7E;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: gray;
    margin-bottom: 25px;
    font-size: 14px;
}

.input-box {
    margin-bottom: 20px;
}

.input-box label {
    font-size: 16px;
    font-weight: bold;
    color: #333;
    display: block;
    margin-bottom: 10px;
}

textarea {
    width: 100%;
    height: 150px;
    padding: 15px;
    border: 2px solid #25D366;
    border-radius: 12px;
    resize: none;
    outline: none;
    font-size: 16px;
}

textarea:focus {
    border-color: #128C7E;
    box-shadow: 0 0 10px rgba(18, 140, 126, 0.3);
}

.btn {
    width: 100%;
    padding: 14px;
    background: #25D366;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    cursor: pointer;
    transition: 0.3s;
    font-weight: bold;
}

.btn:hover {
    background: #128C7E;
}

#numdata {
    margin-top: 25px;
    background: #f7f7f7;
    padding: 15px;
    border-radius: 10px;
    min-height: 60px;
    color: #333;
    border: 1px solid #ddd;
}

.amesage {
    padding: 10px;
    margin: 10px 0;
    background: #f1f1f1;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    .title {
        font-size: 24px;
    }
}