/* dot — technical docs */

* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --fg: #0f172a;
  --fg-soft: #475569;
  --fg-mute: #94a3b8;
  --line: #e2e8f0;
  --line-soft: #f1f5f9;
  --accent: #0891b2;
  --accent-dark: #0e7490;
  --accent-soft: #cffafe;
  --code-bg: #f1f5f9;
}

/* dot: cyan (default) */
body.tool-dot {
  --accent: #0891b2;
  --accent-dark: #0e7490;
  --accent-soft: #cffafe;
}

/* dotcols: amber, distinct from cyan + violet */
body.tool-dotcols {
  --accent: #d97706;
  --accent-dark: #b45309;
  --accent-soft: #fef3c7;
  --bg-alt: #fffbeb;
  --code-bg: #fef9e7;
  --line: #fde68a;
  --line-soft: #fef3c7;
}

/* dotlearn: violet, warmer code bg */
body.tool-dotlearn {
  --accent: #7c3aed;
  --accent-dark: #6d28d9;
  --accent-soft: #ede9fe;
  --bg-alt: #faf5ff;
  --code-bg: #f5f0ff;
  --line: #e9d5ff;
  --line-soft: #f3e8ff;
}

body {
  background: var(--bg); color: var(--fg);
  font: 16px/1.6 -apple-system, "Inter", "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 28px; }

/* — header — */
header {
  background: var(--bg); border-bottom: 1px solid var(--line);
  padding: 16px 0;
}
header .container {
  display: flex; justify-content: space-between;
  align-items: center; gap: 8px 24px;
}
.logo {
  font: 600 18px/1 "JetBrains Mono", ui-monospace, Menlo, monospace;
  color: var(--fg); letter-spacing: -0.5px;
  display: inline-flex; align-items: center; gap: 4px;
}
.logo::before { content: "▸"; color: var(--accent); font-weight: 400; }
.logo:hover { text-decoration: none; color: var(--accent-dark); }
nav.top { display: flex; gap: 0; }
nav.top a {
  color: var(--fg-soft);
  font: 500 14px/1 -apple-system, "Inter", system-ui, sans-serif;
  padding: 8px 14px; border-radius: 6px;
}
nav.top a:hover { background: var(--bg-alt); color: var(--accent); text-decoration: none; }
@media (max-width: 600px) {
  header .container { flex-direction: column; align-items: flex-start; gap: 10px; }
  nav.top { flex-wrap: wrap; }
  nav.top a { padding: 6px 10px; font-size: 13px; }
}

/* — typography — */
h1, h2, h3, h4 {
  font-family: -apple-system, "Inter", system-ui, sans-serif;
  color: var(--fg); line-height: 1.25; letter-spacing: -0.02em;
}
h1 { font-size: 40px; font-weight: 700; margin-bottom: 16px; letter-spacing: -0.03em; }
h2 {
  font-size: 22px; font-weight: 600; margin: 40px 0 14px;
  padding-top: 12px;
}
h2::before {
  content: ""; display: block; width: 24px; height: 2px;
  background: var(--accent); margin-bottom: 14px;
}
h2:first-of-type { margin-top: 0; }
h3 { font-size: 17px; font-weight: 600; margin: 22px 0 8px; }
h4 {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--fg-mute); margin-bottom: 10px;
}
p { margin-bottom: 14px; color: var(--fg-soft); }
p.lead { color: var(--fg); font-size: 17px; margin-bottom: 16px; }
strong { color: var(--fg); font-weight: 600; }
ul, ol { color: var(--fg-soft); }

/* — code — */
pre, pre[class*="language-"] {
  background: var(--code-bg) !important; border: 1px solid var(--line);
  border-radius: 8px; padding: 14px 16px !important;
  margin: 14px 0 !important; overflow-x: auto;
}
pre, pre code, code[class*="language-"] {
  font: 13px/1.55 "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace !important;
  color: var(--fg); text-shadow: none !important;
}
p code, li code, h3 code, td code {
  background: var(--code-bg); padding: 2px 6px; border-radius: 4px;
  font: 13px/1.4 "JetBrains Mono", ui-monospace, Menlo, monospace;
  color: var(--accent-dark); border: 1px solid var(--line-soft);
}

/* — tables — */
table {
  border-collapse: collapse; margin: 14px 0; width: 100%;
  font-size: 14px;
}
th, td {
  text-align: left; padding: 9px 14px;
  border-bottom: 1px solid var(--line);
}
th {
  font-weight: 600; color: var(--fg);
  background: var(--bg-alt); border-bottom: 1px solid var(--line);
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em;
}
td { color: var(--fg-soft); }

/* — expand pairs — */
.expand-pair {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 14px; margin: 16px 0;
}
.expand-pair pre { margin: 0 !important; }
.expand-pair .label {
  font: 600 11px -apple-system, "Inter", sans-serif;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--fg-mute); margin-bottom: 6px;
}
@media (max-width: 700px) {
  .expand-pair { grid-template-columns: 1fr; }
}

/* — compare (index) — */
.compare {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 16px; margin: 24px 0;
}
.compare > div {
  background: var(--bg-alt); border: 1px solid var(--line);
  border-radius: 10px; padding: 16px;
}
.compare h4 {
  margin-bottom: 10px; color: var(--fg-soft);
}
.compare pre {
  margin: 0 !important; background: var(--bg) !important;
}
@media (max-width: 700px) {
  .compare { grid-template-columns: 1fr; }
}

/* — layout (manual: LEFT sidebar + content) — */
.layout { display: grid; gap: 40px; padding: 40px 0 60px; }
@media (min-width: 800px) {
  .layout { grid-template-columns: 200px minmax(0, 1fr); }
}
.content { min-width: 0; max-width: 760px; }
.content section { padding: 8px 0 16px; }
.content section + section { margin-top: 12px; }

aside.toc {
  font: 14px -apple-system, "Inter", system-ui, sans-serif;
  border-right: 1px solid var(--line); padding-right: 24px;
}
@media (max-width: 800px) {
  aside.toc { border-right: none; border-bottom: 1px solid var(--line); padding: 0 0 20px; }
}
@media (min-width: 800px) {
  aside.toc { position: sticky; top: 24px; align-self: start; }
}
aside.toc h4 {
  font-size: 11px; color: var(--fg-mute); margin-bottom: 12px;
  letter-spacing: 0.1em;
}
aside.toc ul { list-style: none; }
aside.toc li { margin: 0; }
aside.toc a {
  color: var(--fg-soft); display: block; padding: 5px 10px;
  border-radius: 5px; font-size: 13px;
}
aside.toc a:hover { background: var(--bg-alt); color: var(--accent); text-decoration: none; }
aside.toc li.group {
  margin: 16px 0 4px;
  font-size: 10px; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--fg-mute); font-weight: 600;
  padding: 0 10px;
}
aside.toc li.group:first-child { margin-top: 0; }

/* — hero (index) — */
.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(circle at 80% 0%, var(--accent-soft) 0%, transparent 50%),
    var(--bg);
}
.hero h1 { font-size: 48px; line-height: 1.1; max-width: 700px; }
.hero .tagline {
  font-size: 18px; color: var(--fg-soft);
  margin: 18px 0 24px; max-width: 640px;
}
.hero .tagline strong { color: var(--fg); }

ul.bullets { list-style: none; max-width: 640px; margin: 0; }
ul.bullets li {
  padding: 8px 0 8px 24px; position: relative;
  color: var(--fg-soft); font-size: 16px;
}
ul.bullets li::before {
  content: "—"; color: var(--accent);
  position: absolute; left: 0; font-weight: 600;
}
ul.bullets strong { color: var(--fg); }

/* — tour terminal — */
pre.term {
  background: #0f172a !important;
  color: #e2e8f0 !important;
  border: 0 !important;
  border-radius: 8px;
  padding: 14px 18px !important;
  margin: 14px 0 !important;
  font: 13px/1.55 "JetBrains Mono", ui-monospace, Menlo, monospace !important;
  overflow-x: auto;
  white-space: pre;
  text-shadow: none !important;
}
pre.term .prompt  { color: #67e8f9; }
pre.term .comment { color: #94a3b8; font-style: italic; }
pre.term .out     { color: #fbbf24; }
.step {
  display: flex; gap: 14px; align-items: baseline;
  margin: 36px 0 8px; padding-top: 18px;
  border-top: 1px solid var(--line);
}
.step:first-of-type { border-top: 0; padding-top: 0; }
.step .num {
  background: var(--accent); color: white;
  width: 28px; height: 28px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font: 600 13px -apple-system, "Inter", sans-serif;
  flex-shrink: 0;
}
.step h2 {
  margin: 0; padding: 0; border: 0;
  font-size: 22px;
}
.step h2::before { display: none; }

/* — glossary box — */
.glossary {
  background: var(--bg-alt); border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 8px; padding: 16px 20px; margin: 18px 0;
  font-size: 14px;
}
.glossary h4 { margin-bottom: 10px; color: var(--fg-soft); }
.glossary dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; }
.glossary dt {
  font: 500 13px "JetBrains Mono", ui-monospace, Menlo, monospace;
  color: var(--accent-dark);
}
.glossary dd { color: var(--fg-soft); }

/* — page (start, example) — */
.page { max-width: 760px; margin: 0 auto; padding: 40px 0 60px; }

/* — footer — */
footer {
  border-top: 1px solid var(--line); padding: 28px 0;
  color: var(--fg-mute); font-size: 13px;
  margin-top: 40px;
}
footer .container {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
footer p { margin: 0; color: var(--fg-mute); }
footer a { color: var(--fg-soft); }
footer a:hover { color: var(--accent); }