:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-code: #1f242c;
    --border: rgb(240 246 252 / 10%);
    --border-hover: rgb(240 246 252 / 25%);
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-blue: #38bdf8;
    --accent-green: #3fb950;
    --accent-purple: #c084fc;
}

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

body {
    font-family: Inter, -apple-system, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    padding: 0 20px 80px;
}

.article-container {
    max-width: 820px;
    margin: 0 auto;
}

/* Nav Header */
.article-header-nav {
    padding: 32px 0 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color 0.15s ease;
}

.back-link:hover {
    color: #7dd3fc;
}

.badge-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 4px 10px;
    border-radius: 9999px;
    background: rgb(56 189 248 / 10%);
    color: var(--accent-blue);
    border: 1px solid rgb(56 189 248 / 25%);
    font-weight: 600;
}

/* Typography */
h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.3rem;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: #fff;
}

.meta-line {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    align-items: center;
}

.meta-line a {
    color: var(--accent-blue);
    text-decoration: none;
}

h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.45rem;
    margin: 44px 0 16px;
    color: #fff;
    letter-spacing: -0.01em;
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
}

h3 {
    font-size: 1.15rem;
    margin: 24px 0 12px;
    color: var(--text-primary);
}

p {
    margin-bottom: 18px;
    color: #c9d1d9;
    font-size: 1.02rem;
}

ul,
ol {
    margin: 0 0 20px 24px;
    color: #c9d1d9;
}

li {
    margin-bottom: 8px;
}

strong {
    color: #fff;
}

/* Blueprint Pre / Code */
pre {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px;
    overflow-x: auto;
    margin: 20px 0 24px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.88rem;
    line-height: 1.5;
    color: #e6edf3;
}

code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    background: rgb(240 246 252 / 8%);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--accent-blue);
}

pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

/* Architecture Diagram Box */
.diagram-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    margin: 24px 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.84rem;
    line-height: 1.45;
    color: var(--accent-blue);
    overflow-x: auto;
    white-space: pre;
}

/* Results Table */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.92rem;
}

th,
td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
}

td {
    color: #c9d1d9;
}

.highlight-green {
    color: var(--accent-green);
    font-weight: 600;
}

/* Author footer card */
.author-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-top: 56px;
    display: flex;
    gap: 20px;
    align-items: center;
}

.author-info h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.15rem;
    margin-bottom: 4px;
    color: #fff;
}

.author-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.author-links {
    display: flex;
    gap: 14px;
}

.author-links a {
    color: var(--accent-blue);
    font-size: 0.85rem;
    text-decoration: none;
    font-weight: 500;
}

.author-links a:hover {
    text-decoration: underline;
}

@media (width <= 600px) {
    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    pre,
    .diagram-box {
        font-size: 0.78rem;
        padding: 14px;
    }

    .author-card {
        flex-direction: column;
        align-items: flex-start;
    }
}