@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Space+Grotesk:wght@400;500;700&display=swap');

:root {
  --bg: #050608;
  --panel: rgba(12, 15, 19, 0.88);
  --panel-strong: #0f1217;
  --ink: #d6d9df;
  --muted: #89919d;
  --line: rgba(214, 217, 223, 0.12);
  --line-strong: #d6d9df;
  --accent: #7aa2b8;
  --accent-strong: #a6c5d7;
  --glow: rgba(122, 162, 184, 0.14);
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.42);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(166, 197, 215, 0.05), transparent 26%),
    linear-gradient(90deg, rgba(214, 217, 223, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(214, 217, 223, 0.05) 1px, transparent 1px),
    var(--bg);
  background-size: auto, 32px 32px, 32px 32px, auto;
  font-family: 'Space Grotesk', sans-serif;
  line-height: 1.72;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at top left, rgba(166, 197, 215, 0.12), transparent 34%),
    radial-gradient(circle at bottom right, rgba(122, 162, 184, 0.1), transparent 28%);
  z-index: -1;
}

.paper {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.site-head,
.post-card,
.post {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.site-head {
  padding: 24px 24px 18px;
}

.site-head::before,
.post-card::before,
.post::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-strong), var(--accent), transparent 80%);
}

.mast {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 20px;
  flex-wrap: wrap;
}

.brand {
  color: var(--ink);
  text-decoration: none;
  font-family: 'IBM Plex Mono', monospace;
  font-size: clamp(1.7rem, 4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.04em;
}

.brand::before {
  content: "> ";
  color: var(--accent-strong);
}

.tagline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.88rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tagline::before {
  content: "status";
  padding: 0.28rem 0.5rem;
  border-radius: 999px;
  background: var(--glow);
  color: var(--accent-strong);
}

.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.nav a {
  color: var(--ink);
  text-decoration: none;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.95rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.nav a:hover,
.nav a:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: var(--glow);
  outline: none;
}

.content {
  margin-top: 28px;
}

.content > section:first-child {
  margin-bottom: 22px;
}

.content > section:first-child h1 {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.content > section:first-child h1::before {
  content: "01";
  color: var(--accent-strong);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.9rem;
  letter-spacing: 0.18em;
}

.post-card,
.post {
  margin-bottom: 20px;
  padding: 24px;
}

.post-card {
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.post-card:hover {
  transform: translateY(-3px);
  border-color: rgba(14, 154, 167, 0.28);
  box-shadow: 0 24px 80px rgba(16, 33, 43, 0.16);
}

.post-card h2,
.post h1 {
  margin: 0;
  font-size: clamp(1.55rem, 4vw, 2.7rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.post-card h2 a,
.post h1 {
  color: var(--ink);
}

.post-card h2 a {
  text-decoration: none;
}

.post-card h2 a:hover,
.post-card h2 a:focus-visible,
a:hover,
a:focus-visible {
  color: var(--accent-strong);
  outline: none;
}

.meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0 16px;
  color: var(--muted);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.meta::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 0 0 6px var(--glow);
}

.post-card p,
.post .body {
  margin: 0;
  font-size: 1.02rem;
  color: rgba(214, 217, 223, 0.92);
}

.post .body > *:first-child {
  margin-top: 0;
}

.post .body > *:last-child {
  margin-bottom: 0;
}

.post .body p,
.post .body ul,
.post .body ol {
  margin: 0 0 1.2rem;
}

.post .body pre {
  margin: 1.4rem 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(9, 12, 16, 0.96);
  color: #d8dee9;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.post .body code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.92em;
}

.post .body :not(pre) > code {
  padding: 0.14rem 0.4rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(122, 162, 184, 0.08);
  color: var(--accent-strong);
}

.post .body pre code {
  display: block;
  white-space: pre;
}

.post .body .mermaid-render,
.post .body .mermaid-error {
  margin: 1.5rem 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.02);
  overflow-x: auto;
}

.post .body .mermaid-error {
  color: #ffb4b4;
  font-family: 'IBM Plex Mono', monospace;
  white-space: pre-wrap;
}

.post .body img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.6rem 0;
  border-radius: 18px;
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(16, 33, 43, 0.14);
}

.post .body blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 16px 16px 0;
  background: rgba(122, 162, 184, 0.08);
  color: var(--ink);
}

a {
  color: var(--accent-strong);
  text-underline-offset: 0.16em;
}

.rule {
  height: 1px;
  margin: 28px 0 12px;
  border: 0;
  background: linear-gradient(90deg, var(--accent-strong), rgba(214, 217, 223, 0.12));
}

.site-foot {
  color: var(--muted);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 720px) {
  .paper {
    padding: 18px 14px 40px;
  }

  .site-head,
  .post-card,
  .post {
    border-radius: 18px;
  }

  .site-head,
  .post-card,
  .post {
    padding: 18px;
  }

  .mast {
    align-items: flex-start;
  }

  .nav {
    margin-top: 14px;
    padding-top: 14px;
  }

  .content > section:first-child h1 {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }
}