@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400&display=swap');

:root {
    --bg: #060a14;
    --surface: rgba(255, 255, 255, 0.03);
    --surface-hover: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    --text: #f0f2f5;
    --text-secondary: #8b95a5;
    --text-tertiary: #5c6575;

    --accent: #5eead4;
    --accent-dim: rgba(94, 234, 212, 0.15);

    --radius: 12px;
    --radius-sm: 8px;

    --font: "Inter", system-ui, -apple-system, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(94, 234, 212, 0.06), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(59, 130, 246, 0.04), transparent);
    pointer-events: none;
    z-index: -1;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: opacity 0.15s;
}

a:hover {
    opacity: 0.8;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(6, 10, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-logo {
    height: 32px;
    opacity: 0.95;
    display: block;
}

.brand-divider {
    width: 1px;
    height: 22px;
    background: var(--border);
}

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

nav {
    display: flex;
    gap: 4px;
}

nav a {
    padding: 8px 14px;
    font-size: 14px;
    color: var(--text-secondary);
    border-radius: 6px;
    transition: all 0.15s;
}

nav a:hover {
    color: var(--text);
    background: var(--surface);
    opacity: 1;
}

/* Article layout */
.article-container {
    max-width: 820px;
    padding-top: 48px;
    padding-bottom: 48px;
}

.article-kicker {
    font-size: 11px;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 12px;
}

.article-title {
    font-size: 34px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 14px;
}

.article-lead {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 18px;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 36px;
}

.tag {
    font-size: 11px;
    font-family: var(--font-mono);
    padding: 5px 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
}

/* Article typography */
.article-body {
    color: var(--text-secondary);
}

.article-body h2 {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text);
    margin: 40px 0 14px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.article-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    margin: 28px 0 10px;
}

.article-body h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin: 22px 0 8px;
}

.article-body p {
    margin: 0 0 14px;
}

.article-body strong {
    color: var(--text);
    font-weight: 500;
}

.article-body ul,
.article-body ol {
    margin: 0 0 14px;
    padding-left: 24px;
}

.article-body li {
    margin: 4px 0;
}

.article-body li::marker {
    color: var(--text-tertiary);
}

.article-body hr {
    border: none;
    height: 0;
    margin: 8px 0;
}

.article-body blockquote {
    border-left: 2px solid var(--accent);
    background: var(--surface);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 12px 18px;
    margin: 0 0 14px;
}

.article-body blockquote p:last-child {
    margin-bottom: 0;
}

/* Code */
.article-body code {
    font-family: var(--font-mono);
    font-size: 13px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 6px;
    color: var(--accent);
    white-space: nowrap;
}

.article-body pre {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    margin: 0 0 14px;
    overflow-x: auto;
}

.article-body pre code {
    background: transparent;
    border: none;
    padding: 0;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.6;
    white-space: pre;
}

/* Tables */
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 14px;
    font-size: 13.5px;
    display: block;
    overflow-x: auto;
}

.article-body th {
    text-align: left;
    font-size: 11px;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 7px 12px;
    white-space: nowrap;
}

.article-body td {
    border: 1px solid var(--border);
    padding: 6px 12px;
    color: var(--text-secondary);
}

.article-body tr:hover td {
    background: var(--surface);
}

/* Article list page */
.article-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 36px;
}

.article-card {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 20px 22px;
    color: inherit;
    transition: all 0.2s;
}

.article-card:hover {
    border-color: var(--border-hover);
    background: var(--surface-hover);
    opacity: 1;
}

.article-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.article-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.article-card .card-meta {
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--text-tertiary);
    margin-bottom: 10px;
}

.article-card .card-cta {
    font-size: 13px;
    color: var(--accent);
    margin-bottom: 0;
}

.articles-note {
    margin-top: 20px;
    font-size: 12px;
    color: var(--text-tertiary);
}

/* Footnote */
.article-footnote {
    margin-top: 48px;
    padding: 16px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 2px solid var(--accent);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
}

/* Footer */
footer {
    padding: 28px 0 40px;
    text-align: center;
    border-top: 1px solid var(--border);
    margin-top: 24px;
}

footer p {
    font-size: 12px;
    color: var(--text-tertiary);
}

footer p + p {
    margin-top: 4px;
}

/* Responsive */
@media (max-width: 600px) {
    header .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .article-title {
        font-size: 26px;
    }

    .article-container {
        padding-top: 32px;
    }
}