:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --background-color: #fafaf8;
    --text-color: #333;
    --panel-background: #ffffff;
    --panel-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1);
    --panel-min-height: 300px; 
}

body {
    font-family: 'Roboto', 'Arial', 'Helvetica', 'Hiragino Sans', 'Meiryo', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 15px 15px 5px 15px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

h1 {
    font-size: 28px;
    color: var(--primary-color);
    margin: 0 0 5px 0;
}

.home-link {
    text-decoration: none;
    color: var(--primary-color);
}

.description {
    font-size: 16px;
    color: var(--text-color);
    margin: 0;
    line-height: 1.4;
}

.container {
    display: flex;
    gap: 30px;
    max-width: 1000px;
    width: 100%;
    margin-bottom: 30px;
}

.left-panel, .right-panel {
    flex: 1;
    background-color: var(--panel-background);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--panel-shadow);
    min-height: var(--panel-min-height);
}


.right-panel {
    display: flex;
    justify-content: center;
    align-items: center;
}

.result-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.result-header {
    font-size: 18px;
    color: var(--primary-color);
    margin: 0 0 15px 0;
}

#result {
    font-size: 36px;
    font-weight: bold;
    text-align: center;
    word-break: break-word;
    width: 100%;
}

.radio-group label {
    align-items: center;
    padding: 5px 10px 5px 0; 
    transition: background-color 0.2s;
}

.radio-group input[type="radio"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 15px;
    height: 15px;
    border: 1px solid var(--primary-color);
    border-radius: 50%;
    margin-right: 10px;
    outline: none;
    position: relative;
    cursor: pointer;
}

.radio-group input[type="radio"]:checked::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    background-color: var(--primary-color);
    border-radius: 50%;
}

.radio-group span {
    font-size: 16px;
}


input[type="number"], input[type="text"] {
    width: 80px;
    padding: 5px;
    margin-right: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    margin-bottom: 10px;
}

select {
    width: 80px;
    padding: 5px;
    margin-right: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    margin-bottom: 10px;
    background-color: white;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

textarea {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    margin-bottom: 10px;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 10px; 
    width: 100%;
    font-size: 1em;
}

button:hover {
    background-color: #2980b9;
}

.copy-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 10px; 
    width: 100%;
    font-size: 14px;
}

.copy-button:hover {
    background-color: #2980b9;
}

.disabled-label {
    color: #888;
    cursor: pointer;
}

.info-section {
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
    padding: 20px;
    background-color: var(--panel-background);
    border-radius: 8px;
    box-shadow: var(--panel-shadow);
    margin-bottom: 20px;
}

.info-section h2 {
    color: var(--primary-color);
    margin-top: 10px;
    margin-bottom: 5px;
    font-size: 20px;
}

.info-section p, .info-section ul, .info-section dl {
    margin-bottom: 20px;
    margin-top: 0;
}

.info-section ul,
.info-section ol {
    padding-left: 0;
    list-style-position: inside;
}

.info-section ul ul,
    .info-section ol ol {
        padding-left: 20px;
}

.info-section dt {
    font-weight: bold;
    margin-top: 10px;
}

.info-section dd {
    margin-bottom: 10px;
    margin-left: 0;
}

footer {
    text-align: center;
    color: var(--text-color);
    padding: 0;
    margin:0;
    font-size: 0.9em;
}

footer p {
    margin: 0;
    font-size: 0.8em;
}

footer p a {
    color: #333;
    text-decoration: none;
    padding: 10px; 
}

.language-versions, .random-tools {
    list-style-type: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.language-versions li, .random-tools li {
    flex-basis: calc(50% - 5px);
}

.language-versions li a, .random-tools li a {
    display: block;
    text-decoration: none;
    color: var(--primary-color);
    background-color: #f0f0f0;
    padding: 10px;
    border-radius: 5px;
    transition: background-color 0.3s, color 0.3s;
    text-align: center;
}

.language-versions li a:hover, .random-tools li a:hover {
    background-color: var(--primary-color);
    color: white;
}

.language-versions li a span, .random-tools li a span {
    display: block;
    font-size: 0.8em;
    color: #666;
}

.language-versions li a:hover span, .random-tools li a:hover span {
    color: #f0f0f0;
}

.useful-links li {
    padding: 5px 0;
}

.useful-links li a {
    color: #004080;
    text-decoration: none;
}

@media (max-width: 768px) {
    body {
        box-sizing: border-box;
    }

    header {
        margin-bottom: 15px;
    }

    h1 {
        font-size: 20px; 
    }

    .description {
        font-size: 14px; 
        padding: 0 20px;
    }

    .container {
        flex-direction: column;
        width: 100%;
        gap: 20px;
        margin-bottom: 15px;
    }

    .left-panel, .right-panel {
        width: 100%;
        box-sizing: border-box;
    }

    input[type="number"], input[type="text"] {
    width: 60px;
    }

    .left-panel, .right-panel {
        width: 100%;
        min-height: var(--panel-min-height);
    }

    .right-panel {
        height: var(--panel-min-height); 
    }

    .result-header {
        font-size: 16px;
    }

    .info-section {
        margin-top: 15px;
    }

    .info-section h2 {
        font-size: 16px;
    }

    .radio-group input[type="radio"] {
        width: 18px;
        height: 18px;
    }

    .radio-group input[type="radio"]:checked::before {
        width: 10px;
        height: 10px;
    }

    .radio-group span {
        font-size: 14px;
    }

    .language-versions li {
        flex-basis: 100%;
    }

}


@media (max-width: 400px) {
   
    input[type="number"], input[type="text"] {
    width: 50px;
    }

}