html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow-y: auto;
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f5f5;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 800px;
    margin: 40px auto 0 auto;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 2rem;
    font-size: 2rem;
}

h2 {
    font-size: 1rem;
    color: #555;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.converter-box {
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.input-section, .output-section {
    margin-bottom: 1.5rem;
}

.format-info {
    margin: 1rem 0;
    color: #666;
    font-size: 0.9rem;
}

.format-info ol, .format-info ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.format-info li {
    margin-bottom: 0.1rem;
    font-size: 0.9rem;
}

code {
    font-family: monospace;
    background-color: #f0f0f0;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9rem;
}

#result-list {
    width: 100%;
    min-height: 100px;
    padding: 1rem;
    border: 2px solid #ddd;
    border-radius: 5px;
    background-color: #f9f9f9;
    overflow-y: auto;
    margin: 0.5rem 0;
    font-size: 0.9rem;
    max-height: 200px;
}

#result-list pre {
    margin: 0;
    white-space: pre-wrap;
    font-size: 0.9rem;
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

button {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

#copy-btn {
    background-color: #4a90e2;
    color: white;
}

#copy-btn:hover {
    background-color: #357abd;
}

@media (max-width: 600px) {
    .container {
        width: 95%;
        margin: 20px auto;
    }
    
    .converter-box {
        padding: 1rem;
    }
    
    button {
        padding: 0.6rem 1.2rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.1rem;
    }

    .format-info, 
    .format-info li,
    code,
    #result-list,
    #result-list pre {
        font-size: 0.85rem;
    }
}