:root {
  --background: #080b0e;
  --surface: #0d1116;
  --surface-hover: #11161c;

  --border: #1b232c;

  --text: #f1f4f6;
  --muted: #8b949e;
  --dim: #59636d;

  --accent: #65d68b;

  --max-width: 1180px;
}

* {
  margin: 0;
  padding: 0;

  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--background);
  color: var(--text);

  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;

  line-height: 1.7;

  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(calc(100% - 48px), var(--max-width));

  margin: 0 auto;
}

/* ---------------- HEADER ---------------- */

.site-header {
  border-bottom: 1px solid var(--border);

  background: rgba(8, 11, 14, 0.88);

  position: sticky;
  top: 0;

  z-index: 10;

  backdrop-filter: blur(12px);
}

.nav {
  height: 72px;

  display: flex;

  align-items: center;

  justify-content: space-between;
}

.brand {
  display: flex;

  align-items: center;

  gap: 12px;
}

.brand-mark {
  font-family: monospace;

  font-size: 13px;

  font-weight: 700;

  letter-spacing: 0.12em;

  color: var(--accent);

  border: 1px solid var(--accent);

  padding: 4px 7px;
}

.brand-name {
  font-size: 14px;

  color: var(--muted);
}

nav {
  display: flex;

  gap: 30px;
}

nav a {
  font-size: 14px;

  color: var(--muted);

  transition: color 0.2s ease;
}

nav a:hover {
  color: var(--text);
}

/* ---------------- BREADCRUMB ---------------- */

.breadcrumb {
  display: flex;

  flex-wrap: wrap;

  gap: 8px;

  margin-bottom: 30px;

  font-family: monospace;

  font-size: 11px;

  color: var(--dim);
}

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

/* ---------------- ARTICLE HERO ---------------- */

.article-hero {
  padding: 100px 0 90px;

  border-bottom: 1px solid var(--border);
}

.article-hero .container {
  max-width: 900px;
}

.eyebrow {
  font-family: monospace;

  font-size: 11px;

  letter-spacing: 0.18em;

  color: var(--accent);

  margin-bottom: 20px;
}

.article-hero h1 {
  max-width: 850px;

  font-size: clamp(48px, 6vw, 72px);

  line-height: 1.04;

  letter-spacing: -0.045em;

  font-weight: 650;
}

.article-lead {
  max-width: 760px;

  margin-top: 28px;

  font-size: 20px;

  line-height: 1.65;

  color: var(--muted);
}

.article-meta {
  display: flex;

  gap: 10px;

  margin-top: 30px;

  font-family: monospace;

  font-size: 10px;

  letter-spacing: 0.12em;

  color: var(--dim);
}

/* ---------------- ARTICLE CONTENT ---------------- */

.article-content {
  padding: 100px 0;
}

.article-layout {
  display: grid;

  grid-template-columns:
    minmax(0, 760px)
    240px;

  gap: 90px;

  align-items: start;
}

.article-body {
  min-width: 0;
}

.article-body p {
  margin-bottom: 24px;

  color: var(--muted);

  font-size: 17px;
}

.article-body .lead {
  font-size: 20px;

  line-height: 1.7;

  color: var(--text);

  margin-bottom: 55px;
}

.article-body h2 {
  margin-top: 70px;

  margin-bottom: 22px;

  font-size: 34px;

  line-height: 1.15;

  letter-spacing: -0.03em;
}

.article-body h3 {
  margin-top: 45px;

  margin-bottom: 15px;

  font-size: 21px;

  line-height: 1.25;
}

.article-body ul {
  margin: 25px 0 30px 22px;

  color: var(--muted);
}

.article-body li {
  padding-left: 8px;

  margin-bottom: 10px;
}

/* ---------------- ARTICLE MEDIA ---------------- */

.article-media {
  width: 100%;

  margin: 35px 0 1.5rem;
}

.article-media img {
  display: block;

  width: 100%;
  max-width: 100%;

  height: auto;

  border: 1px solid var(--border);
}

.article-media figcaption {
  margin-top: 10px;

  font-family: monospace;

  font-size: 10px;

  line-height: 1.5;

  color: var(--dim);
}

/* ---------------- CODE ---------------- */

.article-body pre {
  margin: 28px 0 35px;

  padding: 22px;

  overflow-x: auto;

  border: 1px solid var(--border);

  background: var(--surface);

  font-family: monospace;

  font-size: 13px;

  color: var(--accent);
}

.article-body code {
  font-family: monospace;
}

/* ---------------- CALLOUT ---------------- */

.article-callout {
  margin: 45px 0;

  padding: 24px 26px;

  border-left: 2px solid var(--accent);

  background: rgba(101, 214, 139, 0.035);
}

.callout-label {
  margin-bottom: 10px;

  font-family: monospace;

  font-size: 10px;

  letter-spacing: 0.14em;

  color: var(--accent);
}

.article-callout p {
  margin: 0;

  font-size: 15px;
}

/* ---------------- SIDEBAR ---------------- */

.article-sidebar {
  position: sticky;

  top: 105px;
}

.sidebar-box {
  padding: 22px 0;

  border-top: 1px solid var(--border);
}

.sidebar-box + .sidebar-box {
  margin-top: 20px;
}

.sidebar-label {
  margin-bottom: 10px;

  font-family: monospace;

  font-size: 9px;

  letter-spacing: 0.14em;

  color: var(--dim);
}

.sidebar-box strong {
  display: block;

  font-size: 13px;
}

.sidebar-progress {
  display: flex;

  gap: 5px;

  margin-top: 16px;
}

.sidebar-progress span {
  width: 24px;

  height: 3px;

  background: var(--border);
}

.sidebar-progress .active {
  background: var(--accent);
}

.sidebar-box a {
  font-family: monospace;

  font-size: 11px;

  color: var(--accent);
}

/* ---------------- NAVIGATION ---------------- */

.article-navigation {
  border-top: 1px solid var(--border);

  border-bottom: 1px solid var(--border);
}

.navigation-grid {
  display: grid;

  grid-template-columns: 1fr 1fr;
}

.navigation-item {
  min-height: 150px;

  padding: 30px 0;

  display: flex;

  flex-direction: column;

  justify-content: center;
}

.navigation-next {
  align-items: flex-end;

  text-align: right;

  border-left: 1px solid var(--border);

  padding-left: 40px;
}

.navigation-label {
  margin-bottom: 8px;

  font-family: monospace;

  font-size: 9px;

  letter-spacing: 0.15em;

  color: var(--dim);
}

.navigation-item strong {
  font-size: 20px;
}

.navigation-item > span:last-child {
  font-family: monospace;

  font-size: 11px;

  color: var(--accent);
}

.navigation-disabled {
  color: var(--dim);

  font-size: 13px;
}

/* ---------------- DISCLAIMER ---------------- */

.disclaimer-section {
  padding: 70px 0;
}

.security-warning {
  padding: 18px 20px;

  border-left: 2px solid var(--accent);

  background: rgba(101, 214, 139, 0.035);
}

.warning-title {
  margin-bottom: 8px;

  font-family: monospace;

  font-size: 10px;

  letter-spacing: 0.14em;

  color: var(--accent);
}

.security-warning p {
  margin: 0;

  max-width: 800px;

  font-size: 12px;

  line-height: 1.6;

  color: var(--muted);
}

/* ---------------- FOOTER ---------------- */

.site-footer {
  padding: 42px 0;
}

.footer-content {
  display: flex;

  justify-content: space-between;

  align-items: center;

  gap: 30px;
}

.footer-brand {
  display: flex;

  flex-direction: column;

  gap: 4px;
}

.footer-content strong {
  font-size: 13px;
}

.footer-content span {
  font-size: 12px;

  color: var(--dim);
}

.footer-address {
  margin-top: 14px;

  line-height: 1.6;
}

.footer-links {
  display: flex;

  flex-direction: column;

  gap: 12px;

  align-items: flex-end;
}

.footer-main-links,
.footer-legal-links {
  display: flex;

  flex-wrap: wrap;

  gap: 8px 20px;
}

.footer-links a {
  font-size: 12px;

  color: var(--muted);
}

.footer-links a:hover {
  color: var(--text);
}

/* ---------------- MOBILE ---------------- */

@media (max-width: 850px) {
  .brand-name {
    display: none;
  }

  .nav {
    height: 64px;
  }

  nav {
    gap: 18px;
  }

  .article-hero {
    padding: 75px 0 65px;
  }

  .article-layout {
    grid-template-columns: 1fr;

    gap: 55px;
  }

  .article-sidebar {
    position: static;

    order: -1;
  }

  .article-content {
    padding: 75px 0;
  }

  .article-body h2 {
    margin-top: 55px;
  }

  .footer-content {
    flex-direction: column;

    align-items: flex-start;
  }

  .footer-links {
    align-items: flex-start;
  }
}

/* ---------------- SMALL MOBILE ---------------- */

@media (max-width: 500px) {
  .container {
    width: min(calc(100% - 32px), var(--max-width));
  }

  .article-hero h1 {
    font-size: 44px;
  }

  .article-lead {
    font-size: 18px;
  }

  .article-meta {
    flex-wrap: wrap;
  }

  .article-body p {
    font-size: 16px;
  }

  .article-body .lead {
    font-size: 18px;
  }

  .article-body h2 {
    font-size: 29px;
  }

  .article-body pre {
    padding: 18px;

    font-size: 12px;
  }

  .article-media {
    margin-top: 30px;
  }

  .article-media figcaption {
    font-size: 9px;
  }

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

  .navigation-next {
    border-left: 0;

    border-top: 1px solid var(--border);

    align-items: flex-start;

    text-align: left;

    padding-left: 0;
  }
}