/* NuData Strata — marketing/content pages.
   Standalone (no build step, no JS) so these pages are fast and reliably
   indexable. Tokens mirror the app's design system. */

:root {
  --ink-900: #221d16;
  --ink-700: #4a4238;
  --ink-500: #7d7365;
  --ink-400: #9c9182;
  --ink-300: #c4b9a8;
  --ink-200: #d9d0c1;
  --ink-100: #ece5d8;
  --paper-0: #fffdf8;
  --paper-50: #faf5ec;
  --paper-100: #f3ecdd;
  --accent: #e8871e;
  --accent-strong: #d0740e;
  --accent-soft: #fbecd7;
  --success: #3d6b2f;
  --danger: #a03a2a;
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, Menlo, monospace;
  --wrap: 720px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scrollbar-gutter: stable; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-700);
  background: var(--paper-50);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { color: var(--ink-900); line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(30px, 5vw, 42px); font-weight: 600; }
h2 { font-size: clamp(22px, 3.5vw, 27px); font-weight: 600; margin-top: 2em; }
h3 { font-size: 19px; font-weight: 600; margin-top: 1.8em; }
p, ul, ol { margin: 0 0 1.1em; }
li { margin-bottom: .4em; }
a { color: var(--accent-strong); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--ink-900); }
strong { color: var(--ink-900); font-weight: 600; }
small { font-size: 14px; color: var(--ink-500); }

/* ---------- chrome ---------- */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 24px;
  background: var(--paper-0); border-bottom: 1px solid var(--ink-100);
  position: sticky; top: 0; z-index: 10;
}
.nav__brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600; color: var(--ink-900); text-decoration: none; font-size: 15px;
}
.nav__mark {
  width: 30px; height: 30px; display: grid; place-items: center;
  background: var(--accent); color: #fff; border-radius: 8px; font-size: 13px;
}
.nav__links { display: flex; align-items: center; gap: 20px; font-size: 14px; }
.nav__links a { color: var(--ink-700); text-decoration: none; }
.nav__links a:hover { color: var(--accent-strong); }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 48px 24px 72px; }
.wrap--wide { max-width: 1040px; }

.foot {
  border-top: 1px solid var(--ink-100); background: var(--paper-0);
  padding: 36px 24px; font-size: 14px; color: var(--ink-500);
}
.foot__inner {
  max-width: 1040px; margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between;
}
.foot a { color: var(--ink-700); text-decoration: none; }
.foot a:hover { color: var(--accent-strong); }
.foot__links { display: flex; gap: 20px; flex-wrap: wrap; }

/* ---------- components ---------- */
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 999px;
  background: var(--accent); color: #fff; font-weight: 500; font-size: 15px;
  text-decoration: none; border: 1px solid var(--accent);
  transition: background .15s ease;
}
.btn:hover { background: var(--accent-strong); color: #fff; }
.btn--ghost { background: transparent; color: var(--ink-900); border-color: var(--ink-300); }
.btn--ghost:hover { background: var(--paper-100); color: var(--ink-900); }

.lede { font-size: 20px; line-height: 1.55; color: var(--ink-700); }
.eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--ink-500); margin-bottom: 10px;
}

.card {
  background: var(--paper-0); border: 1px solid var(--ink-100);
  border-radius: 12px; padding: 22px 24px;
}
.grid { display: grid; gap: 16px; }
@media (min-width: 720px) { .grid--3 { grid-template-columns: repeat(3, 1fr); } .grid--2 { grid-template-columns: repeat(2, 1fr); } }

.callout {
  background: var(--accent-soft); border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0; padding: 16px 20px; margin: 1.6em 0; font-size: 16px;
}
.note { font-size: 15px; color: var(--ink-500); }

table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 1.4em 0; }
th, td { text-align: left; padding: 9px 14px 9px 0; border-bottom: 1px solid var(--ink-100); vertical-align: top; }
th { font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-500); border-bottom: 1.5px solid var(--ink-300); }

.toc { background: var(--paper-0); border: 1px solid var(--ink-100); border-radius: 12px; padding: 18px 24px; margin-bottom: 2em; }
.toc ul { margin: 0; padding-left: 20px; font-size: 15px; }

.meta { font-family: var(--font-mono); font-size: 12px; color: var(--ink-400); letter-spacing: .04em; margin-bottom: 28px; }

.term { border-bottom: 1px solid var(--ink-100); padding: 20px 0; }
.term:last-child { border-bottom: none; }
.term h3 { margin-top: 0; }
.term p:last-child { margin-bottom: 0; }