*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  letter-spacing: 0;
}

:root {
  --bg: #070a0f;
  --panel: #0d1117;
  --line: rgba(255, 255, 255, 0.09);
  --text: #e8edf4;
  --body: #c4d0dc;
  --muted: #7a8fa6;
  --faint: #4d6072;
  --accent: #38beff;
  --accent-2: #c084fc;
  --gradient: linear-gradient(270deg, #38beff, #818cf8, #c084fc, #f472b6, #38beff);
}

html {
  background: var(--bg);
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--body);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  padding: 0 24px;
}

.site-header-inner {
  max-width: 1120px;
  min-height: 58px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.site-logo {
  color: var(--text);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0;
}

.site-logo:hover {
  color: var(--text);
  text-decoration: none;
}

.site-logo span,
.gradient-text {
  background: var(--gradient);
  background-size: 400% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: flow 6s ease infinite;
}

.nav-link {
  color: var(--muted);
  font-size: 14px;
}

.nav-link:hover {
  color: var(--text);
  text-decoration: none;
}

.article-shell {
  max-width: 760px;
  margin: 0 auto;
  padding: 62px 24px 92px;
}

.blog-shell {
  max-width: 920px;
  margin: 0 auto;
  padding: 70px 24px 96px;
}

.back-link {
  display: inline-block;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 14px;
}

.kicker {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  max-width: 860px;
  color: var(--text);
  font-size: 58px;
  line-height: 1.02;
  letter-spacing: 0;
  font-weight: 840;
}

.article-shell h1 {
  font-size: 48px;
}

.dek {
  margin-top: 24px;
  color: #d4dee8;
  font-size: 20px;
  line-height: 1.6;
}

.meta {
  margin-top: 26px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font-size: 13px;
}

h2 {
  margin: 50px 0 16px;
  color: var(--text);
  font-size: 25px;
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 18px;
  line-height: 1.35;
}

p {
  margin-bottom: 22px;
}

strong {
  color: var(--text);
  font-weight: 700;
}

ul,
ol {
  margin: 18px 0 26px;
  padding-left: 22px;
}

li {
  margin-bottom: 10px;
}

.source-line {
  margin: 34px 0 38px;
  padding: 0 0 0 18px;
  border-left: 2px solid rgba(56, 190, 255, 0.55);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.takeaway-list {
  padding-left: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.takeaway-list li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  margin: 0;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.takeaway-list span {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.rule {
  margin: 38px 0;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--text);
  font-size: 19px;
  line-height: 1.55;
}

.article-footer {
  margin-top: 58px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.article-footer p {
  color: var(--muted);
  font-size: 15px;
}

.link-list {
  padding-left: 0;
  list-style: none;
}

.link-list li {
  margin-bottom: 12px;
}

.blog-intro {
  max-width: 650px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 18px;
}

.post-list {
  margin-top: 56px;
  border-top: 1px solid var(--line);
}

.post-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.post-date {
  color: var(--faint);
  font-size: 13px;
}

.post-item h2 {
  margin: 0 0 10px;
  font-size: 24px;
}

.post-item p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.post-item a:hover h2 {
  color: var(--accent);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

.site-footer a {
  color: var(--muted);
}

.site-footer a:hover {
  color: var(--text);
  text-decoration: none;
}

@keyframes flow {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

@media (max-width: 680px) {
  body {
    font-size: 16px;
  }

  .site-header-inner {
    min-height: 54px;
  }

  .article-shell,
  .blog-shell {
    padding-left: 20px;
    padding-right: 20px;
  }

  h1,
  .article-shell h1 {
    font-size: 36px;
    line-height: 1.08;
  }

  .dek {
    font-size: 18px;
  }

  .takeaway-list li,
  .post-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .post-list {
    margin-top: 42px;
  }
}