:root {
    --bg-color: #ffffff;
    --text-color: #111111;
    --accent-color: #000000;
    --secondary-color: #666666;
    --code-bg: #f4f4f4;
    --font-stack: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0a0a0a;
        --text-color: #e0e0e0;
        --accent-color: #ffffff;
        --secondary-color: #a0a0a0;
        --code-bg: #1a1a1a;
    }
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-stack);
    line-height: 1.6;
    padding: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

header {
    margin-bottom: 4rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--secondary-color);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

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

.cursor {
    display: inline-block;
    width: 10px;
    height: 1.5rem;
    background-color: var(--accent-color);
    animation: blink 1s step-end infinite;
    vertical-align: middle;
    margin-left: 5px;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

section {
    margin-bottom: 4rem;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-left: 4px solid var(--accent-color);
    padding-left: 1rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.card {
    border: 1px solid var(--secondary-color);
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    background: var(--bg-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 4px 4px 0 var(--accent-color);
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.card p {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.tags {
    margin-bottom: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    font-size: 0.75rem;
    background-color: var(--code-bg);
    padding: 0.2rem 0.5rem;
    border-radius: 2px;
}

.link-btn {
    display: inline-block;
    text-decoration: none;
    color: var(--bg-color);
    background-color: var(--text-color);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    text-align: center;
    transition: opacity 0.2s;
}

.link-btn:hover {
    opacity: 0.8;
}

.link-btn.secondary {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--text-color);
}

footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--secondary-color);
    text-align: center;
    font-size: 0.8rem;
    color: var(--secondary-color);
}