/* Colours and code highlighting follow TypeDB's shared theme tokens
   (typedb-web: common/src/styles/_theme-tokens.scss, _colors-light.scss, prism.scss),
   as used by typedb.com (dark) and TypeDB Studio (dark + light). The page follows the system setting. */
:root {
  --color-black: #0e0e0e;
  --color-deep-purple: #151322;
  --color-purple: #1a182a;
  --color-secondary-purple: #232135;
  --color-light-purple: #2d2a46;
  --color-secondary-grey: #63607c;
  --color-secondary-light-grey: #958fa8;
  --color-grey: #d7d4e5;
  --color-white: #f3f3f3;
  --color-green: #02dac9;
  --color-secondary-blue: #7ba0ff;
  --color-secondary-pink: #ff87dc;

  --prism-white: #ece0ff;
  --prism-cyan: #55eae2;
  --prism-light-green: #02dac9;
  --prism-pink: #ff7abd;
  --prism-blue: #82b6ff;
  --prism-purple: #c099f3;
  --prism-orange: #ffa187;
  --prism-yellow: #ffe4a7;
  --prism-grey: #c69ec3;
  --prism-very-grey: #999999;
  --prism-red: #ff8080;

  --bg: var(--color-black);
  --fg: var(--color-white);
  --muted: var(--color-secondary-light-grey);
  --card: var(--color-purple);
  --line: var(--color-light-purple);
  --accent: var(--color-green);
  --link: var(--color-secondary-blue);
  --code-bg: var(--color-deep-purple);
  --code-font: Monaco, ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --color-black: #fafafa;
    --color-deep-purple: #f0eef6;
    --color-purple: #e8e6f2;
    --color-secondary-purple: #e8e5f0;
    --color-light-purple: #d0cde4;
    --color-secondary-grey: #9d99b2;
    --color-secondary-light-grey: #6b6580;
    --color-grey: #3a3a52;
    --color-white: #1a1a2e;
    --color-green: #008f80;
    --color-secondary-blue: #4070dd;
    --color-secondary-pink: #c050a0;

    --prism-white: #2a2040;
    --prism-cyan: #007a6e;
    --prism-light-green: #008577;
    --prism-pink: #c040a0;
    --prism-blue: #3366cc;
    --prism-purple: #7b44c0;
    --prism-orange: #cc5530;
    --prism-yellow: #8a6d10;
    --prism-grey: #885080;
    --prism-very-grey: #666666;
    --prism-red: #cc3333;

    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  letter-spacing: 0.01em;
}
a { color: var(--link); }
code { font-family: var(--code-font); font-size: .88em; color: var(--color-secondary-pink); }
.page { max-width: 920px; margin: 0 auto; padding: 0 16px 80px; }

header.hero { padding: 56px 0 28px; border-bottom: 1px solid var(--line); }
.hero .eyebrow { color: var(--accent); font-weight: 600; font-size: 14px; letter-spacing: .04em; margin: 0 0 10px; text-transform: uppercase; }
.hero h1 { font-size: 38px; line-height: 1.12; margin: 0 0 14px; }
.hero p { color: var(--color-grey); margin: 0; max-width: 680px; }
.hero p.slides-link { margin-top: 14px; font-weight: 600; }

nav.toc { display: flex; flex-wrap: wrap; gap: 8px; padding: 16px 0; border-bottom: 1px solid var(--line); }
nav.toc a {
  text-decoration: none; font-size: 14px; color: var(--fg);
  padding: 4px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--card);
}
nav.toc a:hover { border-color: var(--accent); color: var(--accent); }

h2 { font-size: 28px; margin: 52px 0 8px; }
h3 { font-size: 20px; margin: 32px 0 8px; }
h4 { font-size: 16px; margin: 26px 0 6px; color: var(--color-grey); }
section > p, .step p { max-width: 720px; }
.lead { color: var(--muted); }

ol.setup { padding-left: 0; list-style: none; counter-reset: step; }
ol.setup > li {
  counter-increment: step; position: relative;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px 14px 56px; margin: 12px 0;
}
ol.setup > li::before {
  content: counter(step); position: absolute; left: 16px; top: 14px;
  width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: var(--color-black);
  display: grid; place-items: center; font-weight: 700; font-size: 14px;
}
ol.setup ul { margin: 6px 0 0; padding-left: 20px; }
.ready { font-weight: 600; color: var(--accent); }

.step { margin: 36px 0; }
.step > h3 { margin: 0 0 10px; }
.step-body { border-left: 3px solid var(--accent); padding: 2px 0 2px 18px; }

figure.diagram {
  margin: 14px 0; padding: 12px; background: var(--card);
  border: 1px solid var(--line); border-radius: 12px; overflow-x: auto;
}
figure.diagram svg { display: block; width: 100%; height: auto; min-width: 460px; }
figure.diagram figcaption { color: var(--muted); font-size: 13px; margin-top: 6px; }

/* ER diagrams (Chen notation) take their colours from the page */
.er text { fill: var(--fg); font: 14px -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; }
.er .links line, .er .links path, .er line.opt { stroke: var(--color-secondary-light-grey); }
.er .ent rect, .er rect.abstract { fill: var(--color-deep-purple); stroke: var(--color-grey); stroke-width: 1.5; }
.er polygon.rel, .er .rel polygon { fill: var(--color-deep-purple); stroke: var(--color-grey); stroke-width: 1.5; }
.er polygon.isa { fill: var(--color-deep-purple); stroke: var(--color-grey); }
.er .attr ellipse { fill: var(--color-deep-purple); stroke: var(--color-secondary-grey); }
.er text.name, .er text.relname { font-weight: 600; }
.er text.role { fill: var(--muted); font-size: 12px; font-style: italic; }
.er path.new { stroke: var(--accent); }
.er text.new-label { fill: var(--accent); }

details.reveal {
  margin: 12px 0; border: 1px solid var(--line); border-radius: 12px; background: var(--card);
}
details.reveal > summary {
  cursor: pointer; padding: 10px 14px; font-weight: 600; list-style: none;
  display: flex; align-items: baseline; flex-wrap: wrap; gap: 8px;
}
details.reveal > summary::-webkit-details-marker { display: none; }
details.reveal > summary::before { content: "▸"; color: var(--accent); transition: transform .15s; }
details.reveal[open] > summary::before { transform: rotate(90deg); }
details.reveal > .body { padding: 0 14px 14px; }
details.reveal .hint { color: var(--muted); font-weight: 400; font-size: 14px; }

.code {
  position: relative; margin: 10px 0; border: 1px solid var(--line); border-radius: 8px;
  background: var(--code-bg); overflow: hidden;
}
.code .bar {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 6px 10px; border-bottom: 1px solid var(--line); font-size: 13px; color: var(--muted);
}
.code .bar .path { font-family: var(--code-font); font-size: 12px; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.code .bar .actions { display: flex; gap: 6px; flex-shrink: 0; }
.code .bar a, .code .bar button {
  font: inherit; font-size: 13px; color: var(--fg); background: var(--color-secondary-purple);
  border: 1px solid var(--line); border-radius: 6px; padding: 2px 10px; cursor: pointer; text-decoration: none;
}
.code .bar button:hover, .code .bar a:hover { border-color: var(--accent); color: var(--accent); }
.code pre {
  margin: 0; padding: 12px 14px; overflow: auto;
  font: 13px/1.6 var(--code-font); tab-size: 2;
}
.code pre code { color: inherit; font-size: inherit; }
.code.tall pre { max-height: 460px; }

/* Prism token colours (typedb-web common/src/styles/prism.scss) */
.code pre { color: var(--prism-white); }
.token.argument { color: var(--prism-white); font-style: italic; }
.token.comment { color: var(--prism-very-grey); font-style: italic; }
.token.super, .token.type { color: var(--prism-cyan); font-style: italic; }
.token.variable { color: var(--prism-cyan); }
.token.modifier { color: var(--prism-blue); font-style: italic; }
.token.class-name, .token.number, .token.datetime, .token.constant { color: var(--prism-blue); }
.token.function { color: var(--prism-light-green); }
.token.string { color: var(--prism-yellow); }
.token.operator, .token.keyword, .token.punctuation, .token.special { color: var(--prism-pink); }
.token.constraint, .token.local-name { color: var(--prism-purple); }
.token.object_label { color: var(--prism-grey); }
.token.irrelevant { color: var(--prism-very-grey); }
.token.annotation { color: var(--prism-orange); }
.token.error { color: var(--prism-red); }

.options { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; margin: 12px 0; }
.options div { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.options b { color: var(--accent); }

.callout { background: rgba(123, 160, 255, 0.09); border: 1px solid rgba(123, 160, 255, 0.35); border-radius: 12px; padding: 12px 16px; margin: 14px 0; }
.callout > b:first-child { color: var(--link); }

.table-wrap { max-height: 420px; overflow: auto; border: 1px solid var(--line); border-radius: 8px; background: var(--code-bg); }
table.data { border-collapse: collapse; font-size: 12.5px; white-space: nowrap; }
table.data th, table.data td { border-bottom: 1px solid var(--line); padding: 5px 10px; text-align: left; }
table.data th { position: sticky; top: 0; background: var(--color-secondary-purple); font-weight: 600; }
table.data td.num { text-align: right; font-variant-numeric: tabular-nums; }

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin: 14px 0; }
.facts div { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.facts b { display: block; font-size: 22px; color: var(--accent); }
.facts span { color: var(--muted); font-size: 13px; }

.cite { font-size: 14px; color: var(--muted); border-left: 3px solid var(--line); padding-left: 12px; }
footer { margin-top: 64px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.error { color: var(--prism-red); }

@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  h2 { font-size: 24px; }
  .step-body { padding-left: 12px; }
}

/* data excerpts inside the tutorial steps */
.table-wrap.excerpt { max-height: none; margin: 12px 0 6px; }
table.data td.repeated { font-weight: 600; }
table.data td.repeated-0 { color: var(--accent); }
table.data td.repeated-1 { color: var(--color-secondary-pink); }
table.data td.repeated-2 { color: var(--link); }
table.data td.repeated-3 { color: var(--prism-orange); }
table.data td.placeholder { color: var(--muted); font-style: italic; }
.excerpt-note { color: var(--muted); font-size: 13px; margin: 0 0 14px; }

/* "Questions or help?" box, always open and fixed to the viewport:
   beside the content on wide screens, a compact bar along the bottom on narrow ones */
.help { position: fixed; z-index: 10; }
.help-panel {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px; box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  display: grid; gap: 10px;
}
.help-title { font-size: 15px; }
.help-panel label { display: grid; gap: 4px; font-size: 14px; }
.help-label i { color: var(--muted); font-style: normal; }
.help-panel input, .help-panel textarea {
  font: inherit; font-size: 14px; color: var(--fg); background: var(--code-bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; resize: vertical;
}
.help-panel input:focus, .help-panel textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.help-send {
  font: inherit; font-weight: 600; cursor: pointer; color: var(--color-black);
  background: var(--accent); border: none; border-radius: 8px; padding: 9px 12px;
}
.help-send:disabled { opacity: .6; cursor: wait; }
.help-status { margin: 0; font-size: 13px; color: var(--muted); }
.help-status:empty { display: none; }

/* wide screens: bottom-right, in a column the page content leaves free */
@media (min-width: 1240px) {
  body { padding-right: 330px; }
  .help { bottom: 24px; right: 24px; width: 290px; }
}

/* narrow screens: compact bar pinned to the bottom (message + send only) */
@media (max-width: 1239px) {
  body { padding-bottom: 134px; }
  .help { left: 0; right: 0; bottom: 0; }
  .help-panel {
    border-radius: 0; border-width: 1px 0 0; padding: 10px 16px;
    grid-template-columns: 1fr auto; align-items: end; gap: 6px 10px;
  }
  .help-panel .help-title, .help-panel .help-name, .help-panel .help-label { display: none; }
  .help-message textarea { height: 84px; resize: none; }
  .help-send { height: 42px; }
  .help-status { grid-column: 1 / -1; }
}

/* TypeQL syntax guide: the Studio highlighting colours, blended toward the background so it stays quiet.
   Pinned to the left on wide screens, in the page flow (after the contents) on narrower ones. */
.syntax {
  --quiet: 62%;
  margin: 16px 0 0; padding: 14px; font-size: 13px; color: var(--muted);
  border: 1px solid var(--line); border-radius: 12px;
}
.syntax p { margin: 0; }
.syntax-title { font-weight: 600; color: var(--color-grey); }
.syntax .syntax-label { margin: 14px 0 6px; font-size: 11px; letter-spacing: .06em; text-transform: uppercase; }
.syntax .syntax-note { margin-bottom: 2px; font-size: 12px; }
.syntax-shape {
  margin: 0; padding: 0; font: 12px/1.55 var(--code-font); white-space: pre-wrap;
  color: color-mix(in srgb, var(--prism-white) var(--quiet), var(--bg));
}
.syntax .s-clause, .syntax .kw.clause { color: color-mix(in srgb, var(--prism-pink) var(--quiet), var(--bg)); }
.syntax .s-kw, .syntax .kw.stmt { color: color-mix(in srgb, var(--prism-purple) var(--quiet), var(--bg)); }
.syntax .kw.kind { color: color-mix(in srgb, var(--prism-cyan) var(--quiet), var(--bg)); font-style: italic; }
.syntax .kw.ann { color: color-mix(in srgb, var(--prism-orange) var(--quiet), var(--bg)); }
.kws { display: flex; flex-wrap: wrap; gap: 5px; }
.kws .kw {
  font: 12px/1.4 var(--code-font); padding: 2px 8px; border-radius: 999px;
  border: 1px solid var(--line); background: transparent;
}

@media (min-width: 1580px) {
  body { padding-left: 300px; }
  .syntax {
    position: fixed; top: 24px; left: 24px; width: 260px; margin: 0;
    max-height: calc(100vh - 48px); overflow-y: auto;
  }
}