body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 300px;
}

h1 {
    text-align: center;
}

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

label {
    margin-top: 10px;
}

.dob-container {
    display: flex;
    gap: 5px;
    margin-bottom: 10px;
}

.dob-container select,
.dob-container input {
    flex: 1;
}

select,
input[type="text"],
input[type="number"] {
    width: 100%;
    padding: 5px;
    margin-bottom: 5px;
}

.day-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
    max-width: 100%;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #fff;
}

.day-grid input[type="radio"] {
    display: none;
}

.day-grid label {
    display: block;
    text-align: center;
    padding: 5px;
    background-color: #f0f0f0;
    border-radius: 3px;
    cursor: pointer;
}

.day-grid input[type="radio"]:checked + label {
    background-color: #333;
    color: #fff;
}

.age-years {
    text-align: center;
    font-weight: bold;
    font-size: 20px;
    margin-bottom: 10px;
}

.age-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    text-align: center;
    padding: 5px;
}

.age-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    
}

.age-cell p {
    margin: 0;
    font-size: 12px;
}

.age-cell span {
    font-weight: bold;
    font-size: 16px;
}

p {
    margin: 10px 0;
}

#ageCalculatorForm p span {
    font-weight: bold;
}