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

:root {
    --bg: #fafafa;
    --text: #1a1a1a;
    --text-light: #666;
    --accent: #2563eb;
    --card-bg: #fff;
    --border: #e5e5e5;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(250, 250, 250, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

nav {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text);
    text-decoration: none;
}

.nav-links a {
    margin-left: 2rem;
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
}

.nav-links a:hover {
    color: var(--accent);
}

/* Main Content */
main {
    max-width: 800px;
    margin: 0 auto;
    padding: 6rem 2rem 4rem;
}

/* Hero */
.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Sections */
.section {
    padding: 3rem 0;
}

.section h2 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: 600;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.card a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.card a:hover {
    text-decoration: underline;
}

.badge {
    display: inline-block;
    background: var(--border);
    color: var(--text-light);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-light);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
}

footer a {
    color: var(--text-light);
}

footer a:hover {
    color: var(--accent);
}

/* Responsive */
@media (max-width: 600px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    nav {
        padding: 1rem;
    }

    main {
        padding: 5rem 1rem 2rem;
    }
}