body {
    min-width: 300px;
    font-family: system-ui, sans-serif;
    background-color: #e5e7eb;
    color: #222;
    padding: 2rem;
    line-height: 1.5;
}

.container {
    max-width: 600px;
    margin: auto;
    background: white;
    padding: 2rem 2rem 0.5rem 2rem;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.05);
}

h1 {
    margin: 0 0 1.5rem 0;
    text-align: center;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.25rem;
}

input[type="date"],
input[type="number"] {
    padding: 0.5rem;
    width: 100%;
    box-sizing: border-box;
    margin-bottom: 0.5rem;
    border: 1px solid #ccc;
    background-color:  #f4faff;
}

input[type="radio"],
input[type="checkbox"] {
    margin-right: 0.5rem;
}

button {
    padding: 0.5rem 1rem;
    background-color: #0077cc;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #005fa3;
}

.result-list {
    text-align: left;
    list-style: none;
    padding-left: 0;
    margin-top: 1rem;
}

.result-line {
    display: flex;
    justify-content: space-between;
    padding: 0.4rem 0;
    border-bottom: 1px solid #eee;
}

.result-line.default {
    padding: 0 0 1rem 0;
    text-align: center;
    color: #555;
    font-style: italic;
}

.result-line.prime {
    color: green;
}

.result-line.nonprime {
    color: darkred;
}

.result-date {
    flex: 1;
    white-space: nowrap;
}

.result-age {
    min-width: 90px;
    text-align: right;
    color: #666;
}

.error {
    color: red;
}

.info {
    font-weight: bold;
    margin-bottom: 1rem;
    text-align: center;
}

.note-block {
    display: flex;
    align-items: flex-start;
    background-color: #eef6fb;
    color: #055160;
    border-left: 4px solid #2ca0c4;
    border-radius: 4px;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    gap: 0.75rem;
}

.note-label {
    font-weight: bold;
    min-width: 60px;
    flex-shrink: 0;
}

.note-text {
    line-height: 1.4;
}

.separator {
    margin: 1rem 0;
    border: none;
    border-top: 1px solid #ccc;
    opacity: 0.6;
}

.footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: #888;
    padding-top: 1rem;
    border-top: 1px solid #ddd;
}

/* Responsive Styles */
@media (max-width: 600px) {
    body {
        padding: 0;
    }

    .container {
        padding: 1.5rem 1.5rem 0.5rem 1.5rem;
        border-radius: 0;
        box-shadow: none;
    }

    h1 {
        font-size: 1.6rem;
    }

    .note-block {
        font-size: 0.75rem;
        gap: 0.5rem;
    }

    .footer {
        font-size: 0.8rem;
    }
}

@media (max-width: 400px) {
    body {
        padding: 0;
    }

    .container {
        padding: 1rem 1rem 0.2rem 1rem;
        border-radius: 0;
        box-shadow: none;
    }

    h1 {
        margin: 0 0 0.6rem 0;
        font-size: 1.3rem;
    }

    .result-line {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.2rem;
    }

    .result-age {
        text-align: left;
        min-width: auto;
        color: #333;
    }

    .note-block {
        padding: 0.5rem;
        gap: 0rem;
    }

    .footer {
        padding-top: 0.5rem;
    }
}