/* Shared styles for the case-study site. Colors are tokens so the diagrams follow light and dark mode. */

:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-2: #f3f1ec;
  --ink: #1c1b19;
  --ink-2: #44423e;
  --muted: #75716a;
  --line: #e3e0d8;
  --line-strong: #c9c4b9;
  --accent: #c8541f;
  --accent-soft: #fbe9df;
  --good: #2f7a4f;
  --good-soft: #e3f1e8;
  --warn: #a8650a;
  --warn-soft: #fbf0db;
  --bad: #b23a3a;
  --bad-soft: #f8e3e1;
  --blue: #2c5d9e;
  --blue-soft: #e4ecf7;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;

  --prose: 660px;
  --wide: 900px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141412;
    --surface: #1c1c19;
    --surface-2: #23231f;
    --ink: #ecebe6;
    --ink-2: #c9c7bf;
    --muted: #96938a;
    --line: #2f2e2a;
    --line-strong: #46443e;
    --accent: #ee8a55;
    --accent-soft: #3a2519;
    --good: #6cc392;
    --good-soft: #1d2f24;
    --warn: #e2ab55;
    --warn-soft: #33281a;
    --bad: #ec8a83;
    --bad-soft: #3a2120;
    --blue: #86aee6;
    --blue-soft: #1d2838;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #141412;
  --surface: #1c1c19;
  --surface-2: #23231f;
  --ink: #ecebe6;
  --ink-2: #c9c7bf;
  --muted: #96938a;
  --line: #2f2e2a;
  --line-strong: #46443e;
  --accent: #ee8a55;
  --accent-soft: #3a2519;
  --good: #6cc392;
  --good-soft: #1d2f24;
  --warn: #e2ab55;
  --warn-soft: #33281a;
  --bad: #ec8a83;
  --bad-soft: #3a2120;
  --blue: #86aee6;
  --blue-soft: #1d2838;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration-color: var(--line-strong); text-underline-offset: 3px; }
a:hover { color: var(--accent); text-decoration-color: currentColor; }

.wrap { max-width: var(--prose); margin: 0 auto; padding: 0 20px; }
.wide { max-width: var(--wide); margin-left: auto; margin-right: auto; padding: 0 20px; }

/* Top bar */
.top {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  max-width: var(--wide); margin: 0 auto; padding: 28px 20px 0;
  font-size: 14px; color: var(--muted);
}
.top a { text-decoration: none; }
.top .name { color: var(--ink); font-weight: 600; }
.top nav { display: flex; gap: 18px; flex-wrap: wrap; justify-content: flex-end; }

/* Headings */
h1, h2, h3 { font-family: var(--serif); font-weight: 500; letter-spacing: -0.01em; line-height: 1.2; }
h1 { font-size: clamp(34px, 6vw, 48px); margin: 72px 0 16px; }
h2 { font-size: 28px; margin: 64px 0 12px; }
h3 { font-size: 20px; margin: 36px 0 8px; }
h1 em, h2 em { color: var(--accent); }

.eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--muted); margin: 0;
}
.lede { font-size: 20px; line-height: 1.55; color: var(--ink-2); margin: 0 0 8px; }
p { margin: 0 0 18px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }

ul.clean { list-style: none; padding: 0; margin: 0 0 18px; }
ul.clean li { padding-left: 18px; position: relative; margin-bottom: 8px; }
ul.clean li::before { content: ""; position: absolute; left: 2px; top: 0.72em; width: 6px; height: 1px; background: var(--muted); }

code { font-family: var(--mono); font-size: 0.86em; background: var(--surface-2); padding: 1px 5px; border-radius: 4px; }
pre {
  font-family: var(--mono); font-size: 13.5px; line-height: 1.6;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px 18px; overflow-x: auto; margin: 0 0 22px; color: var(--ink-2);
}
pre code { background: none; padding: 0; font-size: inherit; }
pre .c { color: var(--muted); }
pre .k { color: var(--accent); }

blockquote {
  margin: 28px 0; padding: 4px 0 4px 20px; border-left: 2px solid var(--accent);
  font-family: var(--serif); font-size: 21px; line-height: 1.5; color: var(--ink);
}

hr { border: 0; border-top: 1px solid var(--line); margin: 56px 0; }

/* At-a-glance card: the five things the application asks for */
.glance {
  border: 1px solid var(--line); border-radius: 14px; background: var(--surface);
  margin: 36px 0 8px; overflow: hidden;
}
.glance dl { margin: 0; display: grid; grid-template-columns: 170px 1fr; }
.glance dt, .glance dd { margin: 0; padding: 14px 18px; border-top: 1px solid var(--line); }
.glance dt:first-of-type, .glance dt:first-of-type + dd { border-top: 0; }
.glance dt { font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); padding-top: 17px; }
.glance dd { font-size: 15.5px; line-height: 1.55; }
@media (max-width: 600px) {
  .glance dl { grid-template-columns: 1fr; }
  .glance dd { border-top: 0; padding-top: 0; }
  .glance dt { padding-bottom: 6px; }
}

/* Facts row */
.facts { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 0; padding: 0; list-style: none; }
.facts li {
  font-size: 13px; color: var(--ink-2); border: 1px solid var(--line); border-radius: 999px;
  padding: 3px 11px; background: var(--surface);
}

/* Figures and diagrams */
figure { margin: 30px 0 34px; }
figure .frame {
  border: 1px solid var(--line); border-radius: 14px; background: var(--surface);
  padding: 22px; overflow-x: auto;
}
figure svg { display: block; width: 100%; height: auto; min-width: 620px; }
figure.fit svg { min-width: 0; }
figcaption { font-size: 14px; color: var(--muted); margin-top: 10px; line-height: 1.5; }
figcaption b { color: var(--ink-2); font-weight: 600; }

svg text { font-family: var(--sans); fill: var(--ink); }
svg .t-label { font-size: 13px; font-weight: 600; }
svg .t-body { font-size: 12px; fill: var(--ink-2); }
svg .t-small { font-size: 11px; fill: var(--muted); }
svg .t-mono { font-family: var(--mono); font-size: 11px; fill: var(--muted); letter-spacing: 0.04em; }
svg .t-accent { fill: var(--accent); }
svg .t-good { fill: var(--good); }
svg .t-bad { fill: var(--bad); }
svg .t-title { font-family: var(--serif); font-size: 17px; }

svg .box { fill: var(--surface); stroke: var(--line-strong); stroke-width: 1; }
svg .box-2 { fill: var(--surface-2); stroke: var(--line); stroke-width: 1; }
svg .box-accent { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1; }
svg .box-good { fill: var(--good-soft); stroke: var(--good); stroke-width: 1; }
svg .box-bad { fill: var(--bad-soft); stroke: var(--bad); stroke-width: 1; }
svg .box-warn { fill: var(--warn-soft); stroke: var(--warn); stroke-width: 1; }
svg .box-blue { fill: var(--blue-soft); stroke: var(--blue); stroke-width: 1; }
svg .box-dash { fill: none; stroke: var(--line-strong); stroke-width: 1; stroke-dasharray: 4 4; }
svg .line { stroke: var(--line-strong); stroke-width: 1.25; fill: none; }
svg .line-accent { stroke: var(--accent); stroke-width: 1.5; fill: none; }
svg .line-dash { stroke: var(--line-strong); stroke-width: 1.25; fill: none; stroke-dasharray: 4 4; }
svg .line-bad { stroke: var(--bad); stroke-width: 1.25; fill: none; stroke-dasharray: 4 4; }
svg .arrowhead { fill: var(--line-strong); }
svg .arrowhead-accent { fill: var(--accent); }
svg .arrowhead-bad { fill: var(--bad); }
svg .dot { fill: var(--muted); }
svg .dot-accent { fill: var(--accent); }

/* Side-by-side comparison grid built in HTML so it reflows on phones */
.grid-compare {
  display: grid; grid-template-columns: 150px 1fr 1fr; border: 1px solid var(--line);
  border-radius: 14px; overflow: hidden; background: var(--surface); font-size: 15px;
}
.grid-compare > div { padding: 14px 16px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.grid-compare > div:nth-child(3n+1) { border-left: 0; }
.grid-compare > div:nth-child(-n+3) { border-top: 0; }
.grid-compare .head { font-family: var(--mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); background: var(--surface-2); }
.grid-compare .kind { font-family: var(--serif); font-size: 18px; }
.grid-compare .kind small { display: block; font-family: var(--sans); font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.grid-compare .flow { font-size: 13px; color: var(--muted); margin-top: 6px; font-family: var(--mono); line-height: 1.6; }
@media (max-width: 640px) {
  .grid-compare { grid-template-columns: 1fr 1fr; }
  .grid-compare > div { border-left: 1px solid var(--line); }
  .grid-compare > div:nth-child(3n+1) { grid-column: 1 / -1; border-left: 0; background: var(--surface-2); }
  .grid-compare > div:nth-child(3n+2) { border-left: 0; }
  .grid-compare > div:nth-child(1) { display: none; }
  .grid-compare > div:nth-child(-n+3) { border-top: 0; }
}

/* Home page cards */
.cards { display: grid; gap: 16px; margin: 28px 0; }
.card {
  display: block; text-decoration: none; border: 1px solid var(--line); border-radius: 14px;
  background: var(--surface); padding: 22px 22px 20px; transition: border-color 0.15s, transform 0.15s;
}
.card:hover { border-color: var(--accent); color: inherit; transform: translateY(-1px); }
.card h3 { margin: 6px 0 6px; font-size: 24px; }
.card p { margin: 0; color: var(--ink-2); font-size: 15.5px; }
.card .more { display: inline-block; margin-top: 12px; font-size: 14px; color: var(--accent); }

.links { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border-top: 1px solid var(--line); margin: 16px 0 0; }
.links a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.links a span { display: block; font-size: 13.5px; color: var(--muted); }
.links a:nth-child(odd) { padding-right: 16px; }
@media (max-width: 560px) { .links { grid-template-columns: 1fr; } }

/* Page navigation and footer */
.toc { font-size: 14px; color: var(--muted); margin: 26px 0 0; display: flex; flex-wrap: wrap; gap: 6px 16px; }
.toc a { text-decoration: none; }
.next {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  border-top: 1px solid var(--line); margin-top: 72px; padding-top: 22px; font-size: 15px;
}
footer { max-width: var(--wide); margin: 0 auto; padding: 48px 20px 56px; font-size: 13px; color: var(--muted); }

.theme-toggle {
  background: none; border: 1px solid var(--line); color: var(--muted); border-radius: 999px;
  font: inherit; font-size: 13px; padding: 2px 10px; cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--line-strong); }

@media print {
  .top nav, .theme-toggle, .next { display: none; }
  figure .frame { break-inside: avoid; }
}