body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background: linear-gradient(to right, #6a11cb, #2575fc); /* Modern gradient background */
    color: #333;
}

.container {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2); /* Enhanced shadow */
    text-align: center;
    width: 90%;
    max-width: 450px;
    box-sizing: border-box;
    animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

h1 {
    color: #333;
    margin-bottom: 25px;
    font-size: 2.2em;
    font-weight: 700;
}

.input-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 10px;
    color: #555;
    font-size: 1.1em;
    font-weight: 600;
}

input[type="date"] {
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 8px;
    width: calc(100% - 24px); /* Adjust for padding */
    max-width: 300px;
    box-sizing: border-box;
    font-size: 1em;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input[type="date"]:focus {
    border-color: #2575fc;
    box-shadow: 0 0 8px rgba(37, 117, 252, 0.3);
    outline: none;
}

button {
    background-color: #2575fc; /* Primary button color */
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 10px rgba(37, 117, 252, 0.3);
}

button:hover {
    background-color: #1a5bbd;
    transform: translateY(-2px);
}

.result {
    margin-top: 30px;
    font-size: 1.5em;
    color: #28a745; /* Success color */
    font-weight: bold;
    line-height: 1.6;
}

#detailedAgeResult {
    margin-top: 20px;
    padding: 15px;
    background-color: #e9f7ef; /* Light background for detailed results */
    border-radius: 10px;
    border: 1px solid #d4edda;
    color: #218838;
    font-size: 1.1em;
    text-align: left;
}

#detailedAgeResult p {
    margin: 8px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#detailedAgeResult span {
    font-weight: 700;
    color: #0056b3; /* Highlight numbers */
    font-size: 1.2em;
}

/* Mobile responsiveness */
@media (max-width: 600px) {
    .container {
        padding: 25px;
        width: 95%;
    }

    h1 {
        font-size: 1.8em;
    }

    label {
        font-size: 1em;
    }

    input[type="date"] {
        padding: 10px;
        font-size: 0.9em;
    }

    button {
        padding: 10px 20px;
        font-size: 1em;
    }

    .result {
        font-size: 1.2em;
    }

    #detailedAgeResult {
        font-size: 1em;
        padding: 10px;
    }
}

.summary-table {
    margin-top: 30px;
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #e2e6ea;
    text-align: left;
}

.summary-table h2 {
    color: #17a2b8;
    margin-bottom: 15px;
    font-size: 1.8em;
    text-align: center;
}

.summary-table table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

.summary-table td {
    padding: 10px 0;
    border-bottom: 1px solid #dee2e6;
    font-size: 1.1em;
}

.summary-table td:first-child {
    font-weight: 600;
    color: #555;
}

.summary-table td:last-child {
    text-align: right;
    font-weight: 700;
    color: #0056b3;
}

.summary-table tr:last-child td {
    border-bottom: none;
}

/* Styles for LCM/HCF Calculator */
.calculator-container { /* Re-using container class for consistency */
    background-color: #ffffff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    text-align: center;
    width: 90%;
    max-width: 450px;
    box-sizing: border-box;
    animation: fadeIn 1s ease-out;
}

.calculator-container h1 {
    color: #333;
    margin-bottom: 25px;
    font-size: 2.2em;
    font-weight: 700;
}

.calculator-container .input-group {
    margin-bottom: 25px;
}

.calculator-container label {
    display: block;
    margin-bottom: 10px;
    color: #555;
    font-size: 1.1em;
    font-weight: 600;
}

.calculator-container input[type="text"] { /* Changed from date to text for numbers */
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 8px;
    width: calc(100% - 24px);
    box-sizing: border-box;
    font-size: 1em;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.calculator-container input[type="text"]:focus {
    border-color: #2575fc;
    box-shadow: 0 0 8px rgba(37, 117, 252, 0.3);
    outline: none;
}

.calculator-container button {
    background-color: #2575fc;
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 10px rgba(37, 117, 252, 0.3);
}

.calculator-container button:hover {
    background-color: #1a5bbd;
    transform: translateY(-2px);
}

#resultsDisplay { /* Styles for the result page */
    margin-top: 30px;
    font-size: 1.5em;
    color: #007bff; /* Blue for results */
    font-weight: bold;
    line-height: 1.6;
}

#resultsDisplay p {
    margin: 10px 0;
}

.back-link {
    display: inline-block;
    margin-top: 25px;
    padding: 10px 20px;
    background-color: #6c757d; /* Secondary button color */
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.back-link:hover {
    background-color: #5a6268;
}

/* Ensure mobile responsiveness is maintained */
@media (max-width: 600px) {
    .calculator-container {
        padding: 25px;
        width: 95%;
    }

    .calculator-container h1 {
        font-size: 1.8em;
    }

    .calculator-container label {
        font-size: 1em;
    }

    .calculator-container input[type="text"] {
        padding: 10px;
        font-size: 0.9em;
    }

    .calculator-container button {
        padding: 10px 20px;
        font-size: 1em;
    }

    #resultsDisplay {
        font-size: 1.2em;
    }
}