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

body {
    background-color: #e9f7ef;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background: #ffffff;
    padding: 25px;
    width: 100%;
    max-width: 400px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0, 128, 0, 0.2);
}

h1 {
    text-align: center;
    color: #1e8449;
    margin-bottom: 20px;
}

.output-box {
    display: flex;
    margin-bottom: 20px;
}

.output-box input {
    flex: 1;
    padding: 10px;
    font-size: 16px;
    border: 2px solid #1e8449;
    border-right: none;
    border-radius: 5px 0 0 5px;
    outline: none;
}

.output-box button {
    background: #1e8449;
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 0 5px 5px 0;
}

.settings {
    margin-bottom: 20px;
}

.setting {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 8px 0;
}

.setting label {
    color: #145a32;
}

.setting input[type="number"] {
    width: 70px;
    padding: 5px;
    border: 1px solid #1e8449;
    border-radius: 5px;
}

.generate-btn {
    width: 100%;
    padding: 12px;
    background: #1e8449;
    color: #ffffff;
    border: none;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
}

.generate-btn:hover,
.output-box button:hover {
    background: #145a32;
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 20px;
    }
}