/* base.css — reset, layout primitives, typography, nav, footer.
   Component styles live in components.css. No colour literals here:
   everything references a semantic token from tokens.css. */

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--surface-sunken);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0; line-height: 1.12; font-weight: 600; text-wrap: balance;
  font-family: var(--font-display);
  letter-spacing: var(--track-display);
}
/* Numerals in data contexts must line up column to column. */
table, .stat__value, .ex__table, [class*="__value"] { font-variant-numeric: tabular-nums; }
p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; height: auto; display: block; }
code { font-family: var(--font-mono); font-size: 0.88em; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.skip-link {
  position: absolute; left: -9999px; top: var(--sp-2);
  background: var(--surface); padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-sm); z-index: 100;
}
.skip-link:focus { left: var(--sp-4); }

/* ---------- layout ------------------------------------------------------ */

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--sp-6); }
/* Wider container for the solutions band. max-width alone does the work:
   below 1600px the padding still governs, so this only bites on big screens. */
.wrap--wide { max-width: var(--wrap-wide); }

.section { padding-block: var(--sp-12); }
.section--last { padding-bottom: var(--sp-16); }
/* Alternating band gives the page a rhythm instead of one flat column. */
.section--band {
  background: var(--surface-band);
  border-block: var(--border) solid var(--line);
}

.split { display: grid; gap: var(--sp-4); align-items: stretch; }
@media (min-width: 860px) {
  .split--problem  { grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); }
  .split--delivery { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
  .split--proof    { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); }
}

/* ---------- typography roles -------------------------------------------- */

/* Eyebrows are mono and tracked — they read as labels on a record, which is
   the whole thesis of the product. */
/* Section eyebrows. Sized up from 11px — tracked uppercase mono needs the
   extra size and weight to stay legible. */
.kicker {
  font-family: var(--font-mono);
  font-size: var(--step-label);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-kicker);
  font-weight: 700;
}
.kicker--invert { color: var(--text-on-invert-kicker); }
.kicker--accent { color: var(--accent); }

/* A section head is a labelled rule, not just stacked text. */
.section-head {
  display: flex; align-items: baseline; gap: var(--sp-3);
  flex-wrap: wrap; margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-3);
  border-bottom: var(--border) solid var(--line);
}
.section-head .kicker { display: flex; align-items: center; gap: var(--sp-2); color: var(--text-heading); }
.section-head .kicker::before {
  content: ""; width: 18px; height: 2px; background: var(--accent-warm); flex: none;
}
.section-head__lede { color: var(--text-soft); font-size: var(--step-0); }
.section-head__link {
  margin-left: auto; font-size: var(--step--1);
  font-family: var(--font-mono); letter-spacing: 0.02em;
}

/* ---------- nav --------------------------------------------------------- */

.nav {
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: var(--border) solid var(--line);
  position: sticky; top: 0; z-index: 50;
}
/* Sized to match kscope.io's nav: 25px logo, 14px uppercase tracked links,
   a wide 1800px container and roomier padding. */
.nav__inner {
  display: flex; align-items: center; gap: var(--sp-8);
  min-height: 76px; max-width: 1800px; padding-inline: var(--sp-6);
}

.nav__logo {
  display: flex; align-items: center; flex: none;
  font-family: var(--font-display);
  font-weight: 600; font-size: var(--step-2); letter-spacing: -0.015em;
  color: var(--text-heading); text-decoration: none;
}
.nav__logo:hover { text-decoration: none; opacity: .82; }
.nav__logo img { height: 25px; width: auto; display: block; }
@media (max-width: 600px) { .nav__logo img { height: 20px; } }

.nav__links { display: flex; align-items: center; gap: var(--sp-6); margin-left: auto; }
.nav__link {
  color: var(--text-soft); font-size: var(--step-0); font-weight: 500;
  letter-spacing: .05em; text-transform: uppercase; text-decoration: none;
  padding-block: var(--sp-3);
}
.nav__link:hover { color: var(--accent); text-decoration: none; }
.nav__link.is-active {
  color: var(--text-heading); font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--accent);
}
/* a real chevron (V), not a tiny triangle glyph — drawn from borders so it
   stays crisp and inherits the link colour (light on the dark hero nav). */
.nav__caret {
  display: inline-block; width: .46em; height: .46em; margin-left: .4em;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: translateY(-.14em) rotate(45deg);
  transition: transform .15s ease;
}
.nav__item--mega:hover .nav__caret,
.nav__item--mega:focus-within .nav__caret { transform: translateY(.02em) rotate(-135deg); }

.nav__utility { display: flex; align-items: center; gap: var(--sp-5); }

.nav__toggle { display: none; background: none; border: 0; cursor: pointer; padding: var(--sp-2); }
.nav__toggle span {
  display: block; width: 20px; height: 2px; margin: 4px 0;
  background: var(--text); border-radius: 2px;
}

/* mega-menu — full-bleed panel under the nav */
.nav__item--mega { position: static; }
.mega {
  position: absolute; left: 0; right: 0; top: 100%;
  background: var(--surface);
  border-top: var(--border) solid var(--line);
  border-bottom: var(--border) solid var(--line-strong);
  box-shadow: 0 24px 48px -24px rgba(30, 27, 75, .28);
  opacity: 0; visibility: hidden; translate: 0 -6px;
  transition: opacity .14s ease, translate .14s ease, visibility .14s;
}
.nav__item--mega:hover .mega,
.nav__item--mega:focus-within .mega { opacity: 1; visibility: visible; translate: 0 0; }

.mega__inner { display: grid; gap: var(--sp-8); padding-block: var(--sp-6) var(--sp-8); }
@media (min-width: 1040px) { .mega__inner { grid-template-columns: minmax(0, 1fr) 260px; } }
.mega__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-8); }
@media (max-width: 1040px) { .mega__grid { grid-template-columns: 1fr 1fr; } }

.mega__label {
  font-family: var(--font-mono);
  font-size: var(--step--2); letter-spacing: .14em; text-transform: uppercase;
  color: var(--text-heading); font-weight: 650;
}
.mega__tag {
  font-size: var(--step--2); color: var(--text-faint);
  padding-bottom: var(--sp-2); margin-bottom: var(--sp-2);
  border-bottom: var(--border) solid var(--line);
}
.mega__link {
  display: block; padding: var(--sp-2) var(--sp-2) var(--sp-2) 0;
  border-radius: var(--radius-sm); text-decoration: none; transition: .12s;
}
.mega__link:hover { background: var(--surface-band); padding-left: var(--sp-2); text-decoration: none; }
.mega__link:hover .mega__name { color: var(--accent); }
.mega__name { display: block; font-size: var(--step-0); font-weight: 650; color: var(--text); }
.mega__stack { display: block; font-size: var(--step--2); color: var(--text-faint); }

/* promo rail */
.mega__promo {
  background: var(--surface-band); border: var(--border) solid var(--line);
  border-radius: var(--radius); padding: var(--sp-5);
  display: flex; flex-direction: column; gap: var(--sp-2);
}
.mega__badge {
  align-self: flex-start; background: var(--action); color: var(--action-text);
  border-radius: var(--radius-pill); padding: 2px var(--sp-3);
  font-family: var(--font-mono); font-size: var(--step--2);
  letter-spacing: .1em; text-transform: uppercase; font-weight: 700;
}
.mega__promo-title { font-family: var(--font-display); font-size: var(--step-2); color: var(--text-heading); }
.mega__promo-body { font-size: var(--step--1); color: var(--text-soft); }
.mega__promo-cta { font-size: var(--step--1); font-weight: 650; color: var(--accent); }
.mega__more {
  margin-top: auto; padding-top: var(--sp-3);
  border-top: var(--border) solid var(--line);
  display: flex; flex-direction: column; gap: var(--sp-1);
}
.mega__more a { font-size: var(--step--1); color: var(--text-soft); }
.mega__more a:hover { color: var(--accent); }

@media (max-width: 900px) {
  /* the top bar wraps so the dropdown flows underneath it, in document flow —
     no absolute overlap, and it stays short because the mega is collapsed */
  .nav__inner { flex-wrap: wrap; gap: 0; column-gap: var(--sp-4); }
  .nav__logo { order: 1; }
  .nav__toggle { display: block; order: 2; margin-left: auto; }
  .nav__links, .nav__utility { flex-basis: 100%; display: none; }

  .nav.is-open .nav__links {
    display: flex; flex-direction: column; align-items: stretch;
    order: 3; gap: 0; padding-top: var(--sp-2);
  }
  .nav.is-open .nav__utility {
    display: flex; flex-direction: column; align-items: stretch;
    order: 4; gap: var(--sp-3); margin-left: 0;
    padding: var(--sp-4) 0 var(--sp-5);
  }

  /* Solutions is a plain link to the index on mobile — the full mega dumping
     all eleven solutions into the dropdown buried everything below it */
  .nav__item--mega .mega { display: none; }
  .nav__caret { display: none; }
  .nav__item--mega { width: 100%; }

  .nav__link {
    width: 100%; padding-block: var(--sp-4);
    border-top: var(--border) solid var(--line);
    font-size: var(--step-1); letter-spacing: .02em; text-transform: none;
  }
  .nav__link.is-active { box-shadow: none; color: var(--accent); }
  .nav__utility .nav__link { border-top: 0; text-align: center;
    border: var(--border) solid var(--line-strong); border-radius: var(--radius);
    padding-block: var(--sp-3); }
  .nav__utility .btn { width: 100%; text-align: center; }
}

/* ---------- footer ------------------------------------------------------ */

.footer {
  background: var(--surface);
  border-top: var(--border) solid var(--line);
  padding-block: var(--sp-10) var(--sp-6);
  margin-top: var(--sp-12);
}
.footer__grid { display: grid; gap: var(--sp-6); grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.footer__label {
  font-size: var(--step--2); letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-heading); font-weight: 600; margin-bottom: var(--sp-3);
}
.footer__link { display: block; font-size: var(--step--1); color: var(--text-soft); padding-block: 3px; }
.footer__base {
  display: flex; justify-content: space-between; gap: var(--sp-4); flex-wrap: wrap;
  margin-top: var(--sp-8); padding-top: var(--sp-4);
  border-top: var(--border) solid var(--line);
  font-size: var(--step--2); color: var(--text-faint);
}

/* ---------- dev affordances (debug mode only) --------------------------- */

.dev-note {
  font-size: var(--step--1); color: var(--note-ink);
  border-left: 2px solid var(--note-ink); padding-left: var(--sp-3);
  margin-top: var(--sp-3); font-style: italic;
}
.dev-banner {
  background: var(--note-bg); border: var(--border) dashed var(--note-ink);
  color: var(--note-ink); border-radius: var(--radius-sm);
  padding: var(--sp-3) var(--sp-4); font-size: var(--step--1);
  margin-block: var(--sp-4);
}
.sg-rule {
  display: flex; gap: var(--sp-3); align-items: baseline;
  margin-top: var(--sp-10); padding-bottom: var(--sp-2);
  border-bottom: 2px solid var(--line-strong);
  font-size: var(--step--1);
}
.sg-rule span { color: var(--text-faint); font-family: var(--font-mono); font-size: var(--step--2); }

.swatches { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--sp-3); }
.swatch { display: flex; align-items: center; gap: var(--sp-2); font-size: var(--step--2); }
.swatch__chip {
  width: 30px; height: 30px; border-radius: var(--radius-sm);
  border: var(--border) solid var(--line-strong); flex: none;
}
.type-scale { margin-top: var(--sp-6); display: flex; flex-direction: column; gap: var(--sp-2); }
.type-scale__row { color: var(--text-soft); }

/* logo swap: white-letters logo on the dark landing hero, color logo elsewhere */
.nav__logo .nav__logo-img--white{display:none}
body.home .nav__logo .nav__logo-img--color{display:none}
body.home .nav__logo .nav__logo-img--white{display:block}

/* ---------- post cover (templates/macros/cover.html) ---------- */
.pcover{position:absolute;inset:0;display:block;overflow:hidden;background:var(--brand-900)}
.pcover__bg{position:absolute;inset:-12%;width:124%;height:124%;object-fit:cover;filter:blur(22px) saturate(1.1);
  opacity:.75;transform:scale(1.05)}
.pcover__img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;display:block}
.pcover__gen{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;gap:6px;
  padding:clamp(12px,4%,24px);text-align:left;
  background:radial-gradient(120% 90% at 100% 0%,rgba(255,131,0,.28),transparent 55%),
             linear-gradient(135deg,var(--brand-800),var(--brand-950))}
.pcover__mark{position:absolute;top:clamp(10px,4%,18px);right:clamp(12px,4%,20px);font-family:var(--font-display);
  font-weight:700;font-size:clamp(18px,3vw,28px);color:rgba(255,255,255,.18)}
.pcover__cat{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--act-300)}
.pcover__title{font-family:var(--font-display);font-size:clamp(14px,1.6vw,20px);line-height:1.25;color:#fff;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
/* win over the older ".ins-card__shot img / .post__img img { object-fit: cover }" rules */
.pcover .pcover__img{object-fit:contain;width:100%;height:100%;position:absolute;inset:0}
.pcover .pcover__bg{position:absolute;inset:-12%;width:124%;height:124%;background:center/cover no-repeat}
/* example citations that aren't live links */
.step__cite,.ex__src{color:inherit;opacity:.85;font-style:normal}

/* /solutions index H1 */
.section-head__title{font-family:var(--font-display);font-size:clamp(30px,4vw,46px);line-height:1.1;margin:var(--sp-2) 0 var(--sp-3)}
.section-head:has(.section-head__title){display:flex;flex-direction:column;align-items:flex-start;gap:0}

.footer__social{display:inline-flex;align-items:center;gap:12px}
.footer__social a{display:inline-flex;color:#0a66c2;opacity:.85}
.footer__social a:hover{opacity:1}