:root {
    --primary-color-light: #258ace;
    --secondary-color-light: #E2DFD0;
    --primary-color-dark: #258ace;
    --secondary-color-dark: #E2DFD0;
    --text-dark: #eee;
    --text-light: #eee;
    --background-dark: #000;
    --background-light: #000;
    --link-color: var(--primary-color-light);
}

body {
    font-family: sans-serif;
    line-height: 1.6;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    color: var(--text-light);
    background: var(--background-light);
}
header {
    text-align: center;
    border-bottom: 1px solid #333;
    padding-bottom: 20px;
    margin-bottom: 30px;
}
h1 {
    color: var(--primary-color-light);
}
h2.section-title {
    color: var(--primary-color-light);
    border-bottom: 2px solid var(--primary-color-light);
    padding-bottom: 5px;
    margin-top: 40px;
}
.intro {
    max-width: 600px;
    margin: 0 auto 40px;
    text-align: center;
}
.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}
.guide-card {
    border: 1px solid;
    border-color: #333;
    background-color: #1b1b1b;
    border-radius: 8px;
    padding: 20px;
    transition: transform 0.2s, box-shadow 0.2s;
}
.guide-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.guide-card h3 {
    margin-top: 0;
    color: var(--primary-color-light);
}
.guide-card a {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}
footer {
    border-top: 1px solid;
    padding-top: 20px;
    margin-top: 40px;
    text-align: center;
    font-size: 0.9em;
    color: #666;
}
h1, h2.section-title, .guide-card h3 {
        color: var(--primary-color-light);
        border-bottom: 2px solid var(--primary-color-light);
    }
@media (prefers-color-scheme: dark) {
    body {
        background-color: var(--background-dark);
        color: var(--text-dark);
    }
    header, footer {
        border-color: #333;
    }
    h1, h2.section-title, .guide-card h3 {
        color: var(--primary-color-dark);
        border-bottom: 2px solid var(--primary-color-dark);
    }
    .guide-card {
        border-color: #333;
        background-color: #1b1b1b;
    }
    :root {
        --link-color: var(--primary-color-dark);
    }
}