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

body {
    font-family: "Courier New", Courier, monospace;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px;
    margin-bottom: 60px;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.hero .subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.feature-card {
    background: white;
    padding: 32px 24px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: #2d3748;
}

.feature-card p {
    color: #718096;
    font-size: 0.95rem;
}

/* Keyboard Shortcuts Section */
.keyboard-shortcuts {
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 60px;
}

.keyboard-shortcuts h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 32px;
    color: #2d3748;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.shortcut {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: #f7fafc;
    border-radius: 6px;
}

kbd {
    display: inline-block;
    padding: 8px 16px;
    font-size: 1rem;
    font-family: monospace;
    font-weight: 600;
    background: linear-gradient(180deg, #fff 0%, #e2e8f0 100%);
    border: 1px solid #cbd5e0;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    min-width: 50px;
    text-align: center;
}

.shortcut span {
    color: #4a5568;
    font-size: 0.95rem;
}

/* CTA Section */
.cta {
    text-align: center;
    padding: 40px 20px;
}

.cta p {
    font-size: 1.1rem;
    color: #4a5568;
    margin-bottom: 24px;
}

.btn-primary {
    display: inline-block;
    padding: 14px 32px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.5);
}

.note {
    margin-top: 16px;
    font-size: 0.9rem;
    color: #718096;
    font-style: italic;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    margin-top: 40px;
    border-top: 1px solid #e2e8f0;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.footer-links a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #764ba2;
    text-decoration: underline;
}

.footer-links span {
    color: #cbd5e0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero .subtitle {
        font-size: 1rem;
    }

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

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

    .keyboard-shortcuts {
        padding: 24px;
    }
}