* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

h2 {
    color: #2c3e50;
    margin-bottom: 15px;
}

.prompt-box {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.prompt-box h3 {
    font-size: 1em;
    font-weight: normal;
    color: #2c3e50;
    margin-bottom: 15px;
}

.prompt-content {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.prompt-content p {
    font-size: 1.4em;
    font-weight: bold;
    line-height: 1.6;
    margin: 0 0 15px 0;
    color: #2c3e50;
}

.prompt-meta {
    margin-top: 10px;
    display: flex;
    gap: 10px;
}

.genre-tag, .level-tag {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: bold;
}

.genre-tag {
    background-color: #3498db;
    color: white;
}

.level-tag {
    background-color: #e74c3c;
    color: white;
}

.copy-button {
    display: block;
    width: 100%;
    padding: 10px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
    margin-bottom: 20px;
}

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

.filter-form {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.filter-controls {
    display: flex;
    align-items: flex-end;
    gap: 15px;
}

.filter-group {
    flex: 1;
    min-width: 0;
}

.filter-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #2c3e50;
}

.filter-group select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.filter-button {
    flex: 0 0 auto;
    padding: 8px 20px;
    background-color: #2ecc71;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
    white-space: nowrap;
    height: 37px;
}

.filter-button:hover {
    background-color: #27ae60;
}

.ai-links {
    margin-bottom: 30px;
}

.button-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
}

.ai-button {
    display: block;
    padding: 12px;
    text-align: center;
    text-decoration: none;
    color: white;
    border-radius: 5px;
    font-weight: bold;
    transition: opacity 0.3s;
}

.ai-button:hover {
    opacity: 0.9;
}

.chatgpt {
    background-color: #10a37f;
}

.gemini {
    background-color: #4285f4;
}

.perplexity {
    background-color: #6c5ce7;
}

.claude {
    background-color: #2c3e50;
}

.tips-section {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.tips-content {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
}

.tips-content p {
    margin-bottom: 10px;
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    
    .button-group {
        grid-template-columns: 1fr;
    }
    
    .filter-controls {
        flex-direction: column;
        gap: 10px;
    }
    
    .filter-button {
        width: 100%;
    }
}