:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #131824;
    --bg-card: #1a1f2e;
    --text-primary: #e8eaf0;
    --text-secondary: #a8b3cf;
    --text-muted: #6b7a9d;
    --accent-primary: #4a9eff;
    --accent-secondary: #7c3aed;
    --accent-success: #10b981;
    --border-color: #2a3142;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--accent-primary);
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.icon-keyboard {
    display: inline-block;
    width: 40px;
    height: 30px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
    position: relative;
    flex-shrink: 0;
}

.icon-keyboard::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    border: 2px solid white;
    border-radius: 2px;
}

.icon-keyboard::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 2px;
    background: white;
    border-radius: 1px;
}

.icon-windows,
.icon-apple,
.icon-linux,
.icon-code,
.icon-browser,
.icon-editor {
    display: inline-block;
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--accent-primary);
    margin-right: 0.5rem;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

main {
    flex: 1;
    padding: 3rem 20px;
}

.hero {
    text-align: center;
    margin-bottom: 4rem;
}

.search-box {
    max-width: 600px;
    margin: 2rem auto;
    display: flex;
    gap: 1rem;
}

#searchInput {
    flex: 1;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    transition: border-color 0.3s;
}

#searchInput:focus {
    outline: none;
    border-color: var(--accent-primary);
}

#searchBtn {
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

#searchBtn:hover {
    background: #3a8ee5;
}

.categories {
    margin-bottom: 4rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-primary);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s, border-color 0.3s;
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.category-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--accent-primary);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.3s;
}

.btn:hover {
    background: #3a8ee5;
}

.popular-shortcuts {
    margin-bottom: 4rem;
}

.shortcuts-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.shortcut-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: border-color 0.3s;
}

.shortcut-item:hover {
    border-color: var(--accent-primary);
}

.shortcut-keys {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    white-space: nowrap;
}

kbd {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--accent-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.shortcut-desc {
    color: var(--text-secondary);
    flex: 1;
}

.about {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

.about p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
}

footer {
    background: var(--bg-secondary);
    border-top: 2px solid var(--accent-primary);
    padding: 2rem 0;
    text-align: center;
    margin-top: auto;
}

footer p {
    color: var(--text-muted);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .search-box {
        flex-direction: column;
    }

    .category-grid {
        grid-template-columns: 1fr;
    }

    .shortcuts-list {
        grid-template-columns: 1fr;
    }

    .shortcut-item {
        flex-direction: column;
        text-align: center;
    }
}