:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
    --text-color: #333;
    --border-color: #ced4da;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    /* background-color: var(--background-color); */
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    /* background-color: white; */
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-color);
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group-row {
    display: flex;
    flex-direction: row;
    gap: 10px;
}
.form-group-row input {
    margin-bottom: 6px;
}
.bottom-gap {
    margin-bottom: 20px;
}
label {
    margin-bottom: 5px;
    font-weight: bold;
}

input, select {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
}

button {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 18px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0056b3;
}

#result {
    margin-top: 30px;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: #e9ecef;
}

#result h2 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.hidden {
    display: none;
}

#explanation {
    margin-top: 20px;
}

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

    input, select, button {
        font-size: 14px;
    }
}