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

:root {
    --color-text: #1a1a1a;
    --color-text-secondary: #666;
    --color-border: #e0e0e0;
    --color-bg: #fafafa;
    --color-card: #fff;
    --color-accent: #0066cc;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-text: #f5f5f5;
        --color-text-secondary: #aaa;
        --color-border: #333;
        --color-bg: #0d0d0d;
        --color-card: #1a1a1a;
        --color-accent: #4d94ff;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    padding: 20px;
}

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

header {
    margin-bottom: 40px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 30px;
}

.site-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    font-family: 'Courier New', monospace;
    letter-spacing: 0.5px;
}

.site-title a {
    color: inherit;
    text-decoration: none;
}

.blink-cursor {
    display: inline-block;
    width: 0.6em;
    height: 0.10em;
    margin-left: 6px;
    margin-bottom: -0.05em;
    background: #01fc2b;
    vertical-align: baseline;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    50.01%, 100% { opacity: 0; }
}

.timestamp {
    font-size: 12px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

nav {
    display: flex;
    gap: 24px;
    margin-top: 20px;
    flex-wrap: wrap;
}

nav a.nav-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 14px;
    cursor: pointer;
    padding: 8px 0;
    transition: color 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
}

nav a.nav-btn:hover,
nav a.nav-btn.active {
    color: var(--color-text);
}

nav a.nav-btn.active {
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 6px;
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-secondary);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    color: inherit;
}

.card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 12px;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.card-icon {
    font-size: 20px;
    opacity: 0.6;
}

.card-description {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.post-header {
    margin-bottom: 32px;
}

.post-title {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 8px;
}

.post-date {
    font-size: 12px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.post-body {
    font-size: 16px;
}

.post-body p {
    margin-bottom: 16px;
    line-height: 1.8;
}

.post-body h2, .post-body h3 {
    margin: 24px 0 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-secondary);
    font-size: 15px;
}

.post-body img {
    width: 100%;
    border-radius: 4px;
    margin: 16px 0;
}

.post-body a {
    color: var(--color-accent);
}

.post-body ul, .post-body ol {
    margin: 0 0 16px 20px;
    line-height: 1.8;
}

.back-link {
    display: inline-block;
    margin-top: 32px;
    font-size: 13px;
    color: var(--color-text-secondary);
    text-decoration: none;
}

.back-link:hover {
    color: var(--color-accent);
}

.empty-state {
    color: var(--color-text-secondary);
    font-size: 14px;
}

@media (max-width: 640px) {
    body {
        padding: 16px;
    }

    .site-title {
        font-size: 24px;
    }

    nav {
        gap: 12px;
    }

    nav a.nav-btn {
        font-size: 12px;
    }

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