:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #1c2430;
  --surface-3: #202b38;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #9ba7b4;
  --accent: #58a6ff;
  --green: #56d364;
  --yellow: #e3b341;
  --red: #ff7b72;
  --purple: #bc8cff;
  --orange: #ffa657;
  --cyan: #56d4dd;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.68;
}

.site-nav {
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 12px;
  padding: 16px 40px;
}

.nav-logo { color: var(--accent); font-size: 15px; font-weight: 700; text-decoration: none; }
.nav-sep { color: var(--border); }
.nav-desc { color: var(--muted); flex: 1; font-size: 13px; }
.nav-home { color: var(--muted); font-size: 13px; text-decoration: none; }
.nav-home:hover { color: var(--accent); }

main {
  margin: 0 auto;
  max-width: 1120px;
  padding: 48px 40px 80px;
}

h1 { font-size: 2rem; font-weight: 700; margin-bottom: 8px; }
h2 {
  border-bottom: 1px solid var(--border);
  font-size: 1.25rem;
  margin: 48px 0 18px;
  padding-bottom: 8px;
}
h3 { color: var(--accent); font-size: 1rem; margin: 24px 0 8px; }
p { margin-bottom: 14px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { margin: 10px 0 18px 22px; }
li { margin-bottom: 7px; }

code {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--orange);
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 13px;
  padding: 2px 6px;
}

pre {
  background: #0b1018;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 14px 0;
  overflow-x: auto;
  padding: 16px;
}

pre code {
  background: none;
  border: 0;
  color: var(--text);
  display: block;
  padding: 0;
}

table {
  border-collapse: collapse;
  margin: 18px 0;
  width: 100%;
}

th,
td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 28px;
  max-width: 820px;
}

.crumbs {
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  margin-bottom: 16px;
}

.hero-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 22px 0 34px;
}

.metric,
.panel,
.command-card,
.script-step,
.run-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.metric { padding: 14px; }
.metric strong { display: block; font-size: 13px; margin-bottom: 4px; }
.metric span { color: var(--muted); display: block; font-size: 13px; }

.callout {
  background: #172334;
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  margin: 20px 0;
  padding: 15px 18px;
}

.callout strong {
  color: var(--accent);
  display: block;
  font-size: 11px;
  letter-spacing: 0.08em;
  margin-bottom: 5px;
  text-transform: uppercase;
}

.tldr-list {
  display: grid;
  gap: 10px;
  list-style: none;
  margin: 14px 0 0;
}

.tldr-list li {
  background: rgb(13 17 23 / 40%);
  border: 1px solid rgb(88 166 255 / 22%);
  border-radius: 8px;
  margin: 0;
  padding: 10px 12px;
}

.tldr-list strong {
  color: var(--text);
  display: inline;
  font-size: 14px;
  letter-spacing: 0;
  margin: 0;
  text-transform: none;
}

.diagram-shell {
  background: #101722;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1.6fr) minmax(260px, 0.9fr);
  margin: 22px 0;
  padding: 18px;
}

.flow-diagram {
  align-items: center;
  display: grid;
  gap: 12px;
}

.flow-row {
  align-items: center;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.flow-row.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.flow-row.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.flow-node {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  min-height: 78px;
  padding: 12px;
  text-align: left;
}

.flow-node:hover,
.flow-node.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgb(88 166 255 / 18%);
}

.flow-node strong { display: block; font-size: 13px; margin-bottom: 5px; }
.flow-node span { color: var(--muted); display: block; font-size: 12px; line-height: 1.45; }

.flow-arrow {
  color: var(--muted);
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 13px;
  text-align: center;
}

.flow-node.good { border-color: rgb(86 211 100 / 55%); }
.flow-node.warn { border-color: rgb(227 179 65 / 65%); }
.flow-node.bad { border-color: rgb(255 123 114 / 65%); }
.flow-node.redis { background: #261923; border-color: rgb(255 123 114 / 55%); }

.detail-panel {
  background: #0b1018;
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 190px;
  padding: 16px;
}

.detail-panel .eyebrow {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.detail-panel h3 { margin-top: 0; }
.detail-panel p { color: var(--muted); font-size: 14px; margin-bottom: 0; }

.command-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.command-card { padding: 14px; }
.command-card h3 { margin-top: 0; }
.command-card p { color: var(--muted); font-size: 14px; }

.script-breakdown {
  display: grid;
  gap: 12px;
  margin: 16px 0;
}

.script-step {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(220px, 0.9fr) minmax(0, 1.5fr);
  padding: 14px;
}

.script-step p { color: var(--muted); margin: 0; }

.run-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.run-card { padding: 14px; }
.run-card h3 { margin-top: 0; }
.run-card p { color: var(--muted); font-size: 14px; margin-bottom: 0; }

.terminal-shot {
  margin: 18px 0 26px;
  overflow-x: auto;
}

.terminal-shot img {
  background: #0b1018;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: block;
  height: auto;
  width: 100%;
}

.terminal-shot img[src$=".svg"] {
  min-width: 760px;
}

.terminal-shot figcaption {
  color: var(--muted);
  font-size: 13px;
  margin-top: 8px;
}

.lab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 8px;
}

.lab-nav a {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  padding: 6px 10px;
}

.lab-nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.source-list a { color: var(--muted); }

@media (max-width: 860px) {
  main { padding: 40px 22px 64px; }
  .site-nav { padding: 14px 22px; }
  .hero-grid,
  .diagram-shell,
  .command-grid,
  .script-step,
  .run-grid {
    grid-template-columns: 1fr;
  }
  .flow-row,
  .flow-row.three,
  .flow-row.four {
    grid-template-columns: 1fr;
  }
  .flow-arrow { text-align: left; }
  table {
    display: block;
    overflow-x: auto;
  }
  thead,
  tbody,
  tr,
  th,
  td {
    display: block;
    width: 100%;
  }
  thead { display: none; }
  tr { border-bottom: 1px solid var(--border); }
  tr:last-child { border-bottom: 0; }
}