body {
    background-color: #0A0A0F;
    color: #E8E8F0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

h1, h2, h3 {
    color: #00D4FF;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    border-left: 4px solid #00D4FF;
    padding-left: 1rem;
}

h2 {
    font-size: 1.75rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
}

p {
    color: #B0B0C0;
    margin-bottom: 1.5rem;
}

.guide-list {
    list-style: none;
    padding: 0;
}

.guide-item {
    background: #12121A;
    border: 1px solid #252530;
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: all 0.2s ease;
}

.guide-item:hover {
    border-color: #00D4FF;
    transform: translateY(-2px);
}

.guide-link {
    display: block;
    padding: 1.5rem;
    text-decoration: none;
    color: #E8E8F0;
    font-weight: 600;
    font-size: 1.1rem;
}

.guide-link span {
    display: block;
    color: #6B6B80;
    font-size: 0.9rem;
    font-weight: 400;
    margin-top: 0.25rem;
}

.back-link {
    display: inline-block;
    margin-bottom: 2rem;
    color: #00D4FF;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
}

.back-link:hover {
    text-decoration: underline;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-card {
    background: #12121A;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #252530;
}

.feature-card h3 {
    margin-top: 0;
    font-size: 1.25rem;
}

@media (max-width: 600px) {
    .container {
        padding: 2rem 1rem;
    }
    h1 {
        font-size: 2rem;
    }
}