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

:root {
  --clr-bg:       #f8f9fb;
  --clr-surface:  #ffffff;
  --clr-border:   #e2e6ed;
  --clr-text:     #1e2a3a;
  --clr-muted:    #5a6a7e;
  --clr-accent:   #0969da;
  --clr-accent-light: #dbeafe;
  --clr-code-bg:  #1e293b;
  --clr-code-fg:  #e2e8f0;
  --radius:       10px;
  --font:         'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:    'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --max-w:        860px;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--clr-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
}
nav .container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.back-link {
  font-size: .9rem;
  font-weight: 600;
  color: var(--clr-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.back-link:hover { color: var(--clr-accent); text-decoration: none; }
.raw-link {
  font-size: .85rem;
  color: var(--clr-muted);
  font-family: var(--font-mono);
}

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.guide-content h1,
.guide-content h2,
.guide-content h3,
.guide-content h4,
.guide-content h5,
.guide-content h6 {
  margin: 1.6em 0 .6em;
  line-height: 1.25;
  font-weight: 700;
}
.guide-content h1 { font-size: 2rem; margin-top: 0; border-bottom: 1px solid var(--clr-border); padding-bottom: .3em; }
.guide-content h2 { font-size: 1.5rem; border-bottom: 1px solid var(--clr-border); padding-bottom: .3em; }
.guide-content h3 { font-size: 1.2rem; }
.guide-content h4 { font-size: 1.05rem; }

.guide-content p { margin: .8em 0; }
.guide-content ul, .guide-content ol { margin: .8em 0 .8em 1.6em; }
.guide-content li { margin: .2em 0; }
.guide-content li > p { margin: .3em 0; }

.guide-content a { color: var(--clr-accent); }

.guide-content blockquote {
  border-left: 4px solid var(--clr-accent);
  background: var(--clr-accent-light);
  padding: 8px 16px;
  margin: 1em 0;
  color: var(--clr-text);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.guide-content blockquote p { margin: .4em 0; }

.guide-content code {
  font-family: var(--font-mono);
  font-size: .88em;
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
}
.guide-content pre {
  background: var(--clr-code-bg);
  color: var(--clr-code-fg);
  padding: 18px 20px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1em 0;
  font-size: .85rem;
  line-height: 1.6;
}
.guide-content pre code {
  background: transparent;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.guide-content table {
  border-collapse: collapse;
  margin: 1em 0;
  width: 100%;
  font-size: .92rem;
}
.guide-content th, .guide-content td {
  border: 1px solid var(--clr-border);
  padding: 8px 12px;
  text-align: left;
}
.guide-content th { background: var(--clr-bg); font-weight: 600; }
.guide-content tr:nth-child(even) td { background: #fafbfc; }

.guide-content hr {
  border: none;
  border-top: 1px solid var(--clr-border);
  margin: 2em 0;
}

.guide-content img { max-width: 100%; border-radius: var(--radius); margin: 1em 0; }

@media (max-width: 640px) {
  main { padding: 24px 16px 64px; }
  nav .container { padding: 0 16px; }
  .raw-link { display: none; }
}