:root {
    --primary-color: #007AFF;
    --secondary-color: #5856D6;
    --background-color: #F5F5F7;
    --text-color: #1D1D1F;
    --hover-color: #2997FF;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 2rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.search-container {
    margin-bottom: 2rem;
}

.search-input {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    border: 2px solid #E5E5E5;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(0, 122, 255, 0.1);
}

.faq-categories {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.category {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.category:hover {
    transform: translateY(-5px);
}

.category h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.faq-item {
    background: white;
    margin-bottom: 1rem;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
}

.faq-question:hover {
    background-color: #F8F8F8;
}

.faq-answer {
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    background-color: #FAFAFA;
}

.faq-answer.active {
    padding: 1.5rem;
    max-height: 500px;
}

.keyboard-shortcut {
    display: inline-block;
    background: #E5E5E5;
    padding: 0.2rem 0.5rem;
    border-radius: 5px;
    font-family: monospace;
    margin: 0 0.2rem;
}

.tag {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 15px;
    font-size: 0.9rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

@media (max-width: 1024px) {
    .faq-categories {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .category {
        padding: 1rem;
    }
    
    .faq-question {
        padding: 1rem;
    }
    
    .faq-answer.active {
        padding: 1rem;
    }
}