:root {
  --void: #08080C;
  --ink: #F2F4FA;
  --ink-dim: rgba(242, 244, 250, 0.62);
  --ink-faint: rgba(242, 244, 250, 0.38);
  --mercury-a: #A8C6FF;
  --mercury-b: #E6D8FF;
  --mercury-c: #9FF2E4;
  --glass-fill: linear-gradient(135deg, rgba(255,255,255,0.085), rgba(255,255,255,0.022) 42%, rgba(255,255,255,0.055));
  --glass-line: rgba(255, 255, 255, 0.13);
  --font-display: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--void);
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(168, 198, 255, 0.28); color: #fff; }

.mono {
  font-family: var(--font-mono);
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.ambient {
  position: fixed;
  inset: -20%;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
}
.g1 {
  width: 50vmax; height: 50vmax;
  left: 10%; top: -5%;
  background: radial-gradient(closest-side, rgba(120, 154, 255, 0.14), transparent 72%);
}
.g2 {
  width: 44vmax; height: 44vmax;
  right: -5%; bottom: 10%;
  background: radial-gradient(closest-side, rgba(190, 150, 255, 0.10), transparent 72%);
}

.site-header {
  position: relative;
  z-index: 2;
  max-width: 920px;
  margin: 0 auto;
  padding: 28px 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.site-logo {
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.site-logo span { color: var(--mercury-a); }
.site-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-nav a {
  color: var(--ink-faint);
  text-decoration: none;
  font-size: 10px;
  transition: color 0.25s ease;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--mercury-a); }

main {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.page-head { margin-bottom: 40px; }
.page-head .tag {
  display: inline-block;
  font-size: 10px;
  color: var(--mercury-c);
  margin-bottom: 14px;
}
.page-head h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 14px;
}
.page-head p {
  color: var(--ink-dim);
  font-weight: 300;
  font-size: 17px;
  max-width: 620px;
}

.glass {
  background: var(--glass-fill);
  -webkit-backdrop-filter: blur(26px) saturate(170%);
  backdrop-filter: blur(26px) saturate(170%);
  border: 1px solid var(--glass-line);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.14);
}

.post-list { display: grid; gap: 18px; }
.post-card {
  display: block;
  padding: 28px 30px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.post-card:hover {
  border-color: rgba(168, 198, 255, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 28px 64px rgba(0, 0, 0, 0.5), 0 0 40px rgba(120, 154, 255, 0.08);
}
.post-card .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 10px;
  color: var(--ink-faint);
  margin-bottom: 12px;
}
.post-card h2 {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.post-card p {
  color: var(--ink-dim);
  font-weight: 300;
  font-size: 15px;
}
.post-card .tags {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-pill {
  font-size: 9px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--ink-faint);
}

.article-wrap { padding: clamp(32px, 5vw, 56px); }
.article-head { margin-bottom: 32px; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.article-head h1 {
  font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 10px;
  color: var(--ink-faint);
}
.article-body {
  color: var(--ink-dim);
  font-weight: 300;
  font-size: 17px;
}
.article-body h2 {
  color: var(--ink);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 36px 0 14px;
}
.article-body h3 {
  color: var(--ink);
  font-size: 20px;
  font-weight: 500;
  margin: 28px 0 10px;
}
.article-body p { margin-bottom: 18px; }
.article-body ul, .article-body ol {
  margin: 0 0 18px 1.2em;
}
.article-body li { margin-bottom: 8px; }
.article-body a {
  color: var(--mercury-a);
  text-decoration: none;
  border-bottom: 1px solid rgba(168, 198, 255, 0.35);
}
.article-body a:hover { border-color: rgba(168, 198, 255, 0.8); }
.article-body em {
  font-style: normal;
  color: var(--ink);
}
.article-body blockquote {
  margin: 28px 0;
  padding: 20px 24px;
  border-left: 2px solid var(--mercury-a);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 0 12px 12px 0;
  color: var(--ink);
  font-size: 18px;
}

.faq { margin-top: 40px; }
.faq-item {
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.faq-item:last-child { border-bottom: 0; }
.faq-item h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 8px;
}
.faq-item p { font-size: 15px; margin: 0; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  color: var(--ink-faint);
  text-decoration: none;
  font-size: 10px;
  transition: color 0.25s ease;
}
.back-link:hover { color: var(--mercury-a); }

.site-footer {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 0 auto;
  padding: 0 24px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--ink-faint);
  font-size: 10px;
}
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a {
  color: var(--ink-faint);
  text-decoration: none;
  transition: color 0.25s ease;
}
.footer-links a:hover { color: var(--mercury-a); }

@media (max-width: 640px) {
  .site-header { flex-direction: column; align-items: flex-start; }
  .post-card { padding: 22px 20px; }
}