/* Jacent landing — "spec sheet" aesthetic. Dependency-free, dark-first, WCAG 2.1 AA.
   Type identity = system monospace (no web-font network call → privacy + LCP + licensing-clean). */

:root {
  --bg:        #0a0b0d;
  --bg-alt:    #101216;
  --panel:     #14171c;
  --ink:       #e9eaec;   /* ~14:1 on --bg */
  --muted:     #9aa1ab;   /* ~7:1 on --bg  */
  --faint:     #6b7280;
  --line:      #23262d;
  --line-2:    #2e333c;
  --accent:    #f5b13d;   /* terminal amber */
  --accent-ink:#0a0b0d;   /* text on amber — ~10:1 */
  --now:       #5fd08a;   /* status: available now */
  --preview:   #f5b13d;   /* status: in progress / preview */
  --commit:    #7db4ff;   /* status: commitment */

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --wrap: 76rem;
  --gap: clamp(1rem, 3vw, 2.5rem);
  --radius: 4px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  /* blueprint grid texture — atmosphere, very low contrast */
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px, 64px 64px;
  background-position: -1px -1px;
}
/* dim the grid so it reads as texture, not lines */
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: -1;
  background: radial-gradient(120% 80% at 50% -10%, transparent 40%, var(--bg) 78%);
}

.wrap { width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto; }

/* ---------- typography ---------- */
h1, h2, h3 { font-family: var(--mono); font-weight: 600; letter-spacing: -0.02em; line-height: 1.08; }
a { color: var(--ink); text-underline-offset: 3px; }
strong { color: var(--ink); font-weight: 600; }
.prose { max-width: 60ch; color: var(--muted); }
.prose p { margin: 0 0 1rem; }
.prose strong { color: var(--ink); }

.eyebrow, .secnum, .pillar__status, .legend, .timeline__date, .who__label, .field__hint, .hero__meta {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.04em; text-transform: lowercase;
}

/* ---------- skip link + focus ---------- */
.skip-link {
  position: absolute; left: 0.5rem; top: -3rem; z-index: 100;
  background: var(--accent); color: var(--accent-ink); padding: 0.5rem 0.9rem; border-radius: var(--radius);
  font-family: var(--mono); font-size: 0.85rem; transition: top .15s var(--ease);
}
.skip-link:focus { top: 0.5rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5ch; cursor: pointer;
  font-family: var(--mono); font-size: 0.9rem; letter-spacing: 0.01em;
  padding: 0.7rem 1.1rem; border-radius: var(--radius); border: 1px solid var(--line-2);
  background: transparent; color: var(--ink); text-decoration: none;
  transition: border-color .15s var(--ease), background .15s var(--ease), color .15s var(--ease), transform .15s var(--ease);
}
.btn:hover { border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn--primary:hover { background: #ffc35e; border-color: #ffc35e; }
.btn--ghost { border-color: var(--line-2); }
.btn--link { border-color: transparent; padding-inline: 0.2rem; color: var(--muted); }
.btn--link:hover { color: var(--ink); border-color: transparent; }
.btn--lg { padding: 0.85rem 1.4rem; font-size: 0.95rem; }
.btn--sm { padding: 0.5rem 0.8rem; font-size: 0.82rem; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.wordmark { font-family: var(--mono); font-weight: 600; font-size: 1.05rem; text-decoration: none; letter-spacing: -0.01em; display: inline-flex; align-items: baseline; }
.wordmark__g { color: var(--ink); }
.wordmark__ai { color: var(--faint); }  /* "-ai" de-emphasised per DEC-002 */
.wordmark__cursor { display: inline-block; width: 0.5ch; height: 1em; margin-left: 2px; background: var(--accent); transform: translateY(2px); animation: blink 1.2s steps(1) infinite; }
.site-nav { display: flex; align-items: center; gap: clamp(0.8rem, 2vw, 1.6rem); }
.site-nav a { font-family: var(--mono); font-size: 0.88rem; color: var(--muted); text-decoration: none; }
.site-nav a:hover { color: var(--ink); }
.site-nav a.btn { color: var(--ink); }
@media (max-width: 640px) { .site-nav a:not(.btn) { display: none; } }

@keyframes blink { 0%,50% { opacity: 1; } 51%,100% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .wordmark__cursor { animation: none; } }

/* ---------- hero ---------- */
.hero { padding: clamp(3rem, 8vw, 6rem) 0 clamp(2.5rem, 6vw, 4.5rem); border-bottom: 1px solid var(--line); }
.hero__grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
@media (max-width: 900px) { .hero__grid { grid-template-columns: 1fr; } }
.eyebrow { color: var(--accent); display: inline-flex; align-items: center; gap: 0.6ch; margin: 0 0 1.2rem; }
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }
.hero__h { font-size: clamp(2.1rem, 1.4rem + 4vw, 4rem); margin: 0 0 1.2rem; }
.hero__sub { color: var(--muted); font-size: clamp(1.02rem, 0.98rem + 0.4vw, 1.2rem); max-width: 42ch; margin: 0 0 1.8rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.8rem; align-items: center; }
.hero__meta { color: var(--faint); margin: 1.4rem 0 0; }
/* variant switching */
[data-cell] { display: none; }
[data-variant="a"] [data-cell="a"],
[data-variant="b"] [data-cell="b"],
[data-variant="c"] [data-cell="c"] { display: block; }

/* hero entrance — staggered, motion-safe */
.hero__copy > * { opacity: 0; transform: translateY(10px); animation: rise .6s var(--ease) forwards; }
.hero__copy > *:nth-child(1) { animation-delay: .05s; }
.hero__copy > *:nth-child(2) { animation-delay: .12s; }
.hero__copy > *:nth-child(3) { animation-delay: .19s; }
.hero__copy > *:nth-child(4) { animation-delay: .26s; }
.hero__copy > *:nth-child(5) { animation-delay: .33s; }
.codeframe, .capmap { opacity: 0; transform: translateY(10px); animation: rise .7s var(--ease) .3s forwards; }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .hero__copy > *, .codeframe, .capmap { animation: none; opacity: 1; transform: none; }
}

/* code motif */
.codeframe { margin: 0; border: 1px solid var(--line-2); border-radius: 6px; background: var(--panel); overflow: hidden; box-shadow: 0 24px 60px -30px rgba(0,0,0,.8); }
.codeframe__bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--line); background: #0e1014; }
.codeframe__tab { font-family: var(--mono); font-size: 0.8rem; color: var(--ink); }
.codeframe__lang { font-family: var(--mono); font-size: 0.72rem; color: var(--faint); }
.codeframe__code { margin: 0; padding: 1rem 1rem 1rem 0.4rem; font-family: var(--mono); font-size: 0.82rem; line-height: 1.75; color: var(--ink); overflow-x: auto; }
.codeframe__code .ln { display: inline-block; width: 2.2ch; margin-right: 1ch; color: var(--faint); text-align: right; user-select: none; }
.codeframe__code .kw { color: #c98bdb; }
.codeframe__code .fn { color: var(--commit); }
.codeframe__code .cm { color: var(--now); }
.codeframe__code .ln.bp { position: relative; color: var(--accent); }
.codeframe__code .ln.bp::before { content: "●"; position: absolute; left: -0.6ch; color: var(--accent); animation: bp 1.6s var(--ease) infinite; }
@keyframes bp { 0%,100% { opacity: .5; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .codeframe__code .ln.bp::before { animation: none; } }
.codeframe__cap { padding: 0.6rem 0.9rem; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 0.72rem; color: var(--faint); }

/* capability map (hero visual for variants A & C) — breadth as scope, honest status chips */
.capmap { margin: 0; border: 1px solid var(--line-2); border-radius: 6px; background: var(--panel); overflow: hidden; box-shadow: 0 24px 60px -30px rgba(0,0,0,.8); }
.capmap__bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--line); background: #0e1014; }
.capmap__tab { font-family: var(--mono); font-size: 0.8rem; color: var(--ink); }
.capmap__lang { font-family: var(--mono); font-size: 0.72rem; color: var(--faint); }
.capmap__grid { list-style: none; margin: 0; padding: 0.5rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.capmap__tile { display: flex; align-items: center; gap: 0.6ch; font-family: var(--mono); font-size: 0.82rem; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.7rem 0.8rem; }
.capmap__tile--open { grid-column: 1 / -1; color: var(--accent); border-color: color-mix(in srgb, var(--accent) 30%, var(--line)); }
.capmap__dot { font-size: 0.7em; color: var(--faint); }
.capmap__dot.status--now { color: var(--now); }
.capmap__dot.status--preview { color: var(--preview); }
.capmap__cap { padding: 0.6rem 0.9rem; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 0.72rem; color: var(--faint); line-height: 1.5; }
@media (max-width: 420px) { .capmap__grid { grid-template-columns: 1fr; } }

/* ---------- bands / sections ---------- */
.band { padding: clamp(2.8rem, 7vw, 5rem) 0; border-bottom: 1px solid var(--line); }
.band--alt { background: var(--bg-alt); }
.band--cta { background:
    radial-gradient(80% 120% at 100% 0%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 60%),
    var(--bg-alt); }
.section { max-width: var(--wrap); }
.secnum { color: var(--accent); display: block; margin: 0 0 0.8rem; }
.section__h { font-size: clamp(1.5rem, 1.2rem + 1.6vw, 2.3rem); margin: 0 0 1.4rem; max-width: 22ch; }

/* pillars */
.pillars { list-style: none; margin: 1.5rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
@media (max-width: 760px) { .pillars { grid-template-columns: 1fr; } }
/* odd tile count: let the last pillar span the full row so the 2-col grid stays tidy */
.pillar:last-child:nth-child(odd) { grid-column: 1 / -1; }
.pillar { background: var(--panel); padding: 1.5rem; transition: background .15s var(--ease); }
.pillar:hover { background: #171b21; }
.pillar__status { display: inline-flex; align-items: center; gap: 0.5ch; margin: 0 0 0.8rem; }
.pillar__h { font-size: 1.12rem; margin: 0 0 0.5rem; }
.pillar__body { color: var(--muted); margin: 0; font-size: 0.96rem; }
.status--now { color: var(--now); }
.status--preview { color: var(--preview); }
.status--commit { color: var(--commit); }
.chip { font-size: 0.7em; }
.legend { color: var(--faint); margin: 1.4rem 0 0; max-width: 70ch; line-height: 1.7; text-transform: none; }
.legend .status--now, .legend .status--preview, .legend .status--commit { text-transform: lowercase; }

/* timeline */
.timeline { list-style: none; margin: 0 0 1.5rem; padding: 0; display: grid; gap: 0.5rem; max-width: 52ch; }
.timeline li { display: flex; gap: 1rem; align-items: baseline; padding: 0.7rem 0; border-bottom: 1px solid var(--line); color: var(--ink); }
.timeline__date { color: var(--accent); min-width: 7ch; text-transform: none; }

/* who */
.who__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
@media (max-width: 700px) { .who__grid { grid-template-columns: 1fr; } }
.who__col { background: var(--panel); padding: 1.5rem; }
.who__col--in { border-top: 2px solid var(--now); }
.who__col--out { border-top: 2px solid var(--faint); }
.who__label { margin: 0 0 0.8rem; color: var(--muted); }
.who__col ul { margin: 0; padding-left: 1.1rem; color: var(--muted); display: grid; gap: 0.4rem; }

/* faq */
.faq { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; max-width: 64ch; }
.faq details { background: var(--panel); }
.faq summary { cursor: pointer; padding: 1rem 1.2rem; font-family: var(--mono); font-size: 0.95rem; color: var(--ink); list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.2rem; transition: transform .2s var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0; padding: 0 1.2rem 1.2rem; color: var(--muted); max-width: 60ch; }

/* ---------- form ---------- */
.form { margin: 1.8rem 0 0; max-width: 44rem; display: grid; gap: 1.1rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
@media (max-width: 600px) { .form__row { grid-template-columns: 1fr; } }
.field { display: grid; gap: 0.4rem; }
.field label { font-family: var(--mono); font-size: 0.85rem; color: var(--ink); }
.field input, .field textarea {
  font-family: var(--sans); font-size: 1rem; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 0.7rem 0.8rem; width: 100%; transition: border-color .15s var(--ease);
}
.field input:focus, .field textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.field textarea { resize: vertical; min-height: 6rem; }
.field__hint { color: var(--faint); text-transform: none; }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: #ff6b6b; }
.field__error { color: #ff8585; font-family: var(--mono); font-size: 0.78rem; }
.field--consent { grid-template-columns: auto 1fr; column-gap: 0.6rem; align-items: start; }
.field--consent input { width: auto; margin-top: 0.25rem; }
.field--consent label { font-family: var(--sans); font-size: 0.95rem; color: var(--muted); }
.field--consent .field__hint { grid-column: 1 / -1; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form__status { font-family: var(--mono); font-size: 0.9rem; min-height: 1.2em; margin: 0.2rem 0 0; }
.form__status.is-ok { color: var(--now); }
.form__status.is-err { color: #ff8585; }
.form__noscript { color: var(--muted); font-size: 0.9rem; }

/* ---------- footer ---------- */
.site-footer { padding: 2rem 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.footer__mark { font-family: var(--mono); font-size: 0.82rem; color: var(--faint); margin: 0; }
.footer__mark span { color: #4b515b; }
.footer__nav { display: flex; gap: 1.2rem; }
.footer__nav a { font-family: var(--mono); font-size: 0.82rem; color: var(--muted); text-decoration: none; }
.footer__nav a:hover { color: var(--ink); }

/* ---------- consent bar ---------- */
.consent {
  position: fixed; left: 1rem; right: 1rem; bottom: 1rem; z-index: 60; margin-inline: auto; max-width: 42rem;
  background: var(--panel); border: 1px solid var(--line-2); border-radius: 8px; padding: 1rem 1.1rem;
  display: flex; gap: 1rem; align-items: center; justify-content: space-between; flex-wrap: wrap;
  box-shadow: 0 20px 50px -25px rgba(0,0,0,.9);
}
.consent p { margin: 0; color: var(--muted); font-size: 0.9rem; max-width: 40ch; }
.consent__actions { display: flex; gap: 0.6rem; }

/* ---------- utilities (so no inline styles are needed → strict CSP) ---------- */
.narrow { max-width: 64ch; }
.field__opt { color: var(--faint); font-weight: 400; text-transform: none; }
.normal-case { text-transform: none; }
.note--draft {
  border: 1px solid var(--preview); border-radius: 6px; padding: 0.9rem 1rem;
  color: var(--preview); text-transform: none;
}

/* ---------- responsive nicety ---------- */
@media (max-width: 900px) { .codeframe { order: 2; } }