/* Applied Autonomy LLC — the July 2026 dark "circuit schematic" page layer, on the design system in
   styles.css: a near-black technical field (tokens re-derived from the system's own ramps), caption
   rules, blueprint plates with registration corners, and the principles spec sheet. bg.js draws the
   background canvases behind the content. */
html:root {
  --color-bg: color-mix(in srgb, var(--color-neutral-900) 38%, black);
  --color-surface: var(--color-neutral-900);
  --color-text: var(--color-neutral-100);
  --color-divider: color-mix(in srgb, var(--color-neutral-100) 22%, transparent);
}
:root {
  --leading: 24px;
  --half: 12px;
  --edge: clamp(20px, 5vw, 72px);
  --measure: 60ch;
}
html { scroll-behavior: smooth; background: #0d0f11; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; text-wrap: pretty; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 var(--edge); position: relative; z-index: 1; }
.nav { padding-inline: max(var(--edge), calc((100% - 1200px) / 2 + var(--edge)));
  position: relative; z-index: 1; }
.nav a { white-space: nowrap; }
@media (max-width: 480px) { .nav a { display: none; } }
.bg-layer { position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none; }

/* — caption rules — */
.kicker {
  display: block; font-size: 13px; line-height: var(--half);
  letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600;
  color: var(--color-accent-400); /* the deep step flips to a light step on the dark ground */
  font-feature-settings: "tnum" 1;
  margin: 0 0 var(--half);
}
.caption-rule { height: 1px; border: 0; margin: 0 0 calc(var(--leading) - var(--half));
  background: var(--color-divider); }

/* — hero — */
.hero { padding: calc(4 * var(--leading)) 0 calc(3 * var(--leading)); }
.display {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: clamp(48px, 7vw, 96px);
  line-height: clamp(50px, 7.3vw, 100px);
  letter-spacing: 0.01em; text-transform: uppercase; margin: 0;
  margin-left: -0.052em;
  text-box: trim-both cap alphabetic;
}
.display .line { display: block; }
.hero .sub { font-size: 16px; line-height: var(--leading); max-width: var(--measure);
  margin: calc(1.5 * var(--leading) - 1cap) 0 0;
  text-box: trim-both cap alphabetic; }
.hero .row { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--leading); }
.btn-ghost { color: var(--color-accent-400); }
.btn-ghost:hover { color: var(--color-accent-300); }

/* — the mission (01) — */
.mission { padding: calc(2.5 * var(--leading)) 0 calc(2 * var(--leading)); }
.mission p { font-size: 16px; line-height: var(--leading); max-width: var(--measure);
  margin: calc(var(--leading) - 1cap) 0 0;
  text-box: trim-both cap alphabetic; }
.mission p + p { margin-top: var(--leading); }

/* — the principles plate (sheet 02) — */
.sheet { padding: calc(2.5 * var(--leading)) 0 calc(2.5 * var(--leading)); }
.plate { position: relative; border: 1px solid var(--color-divider);
  background: color-mix(in srgb, var(--color-bg) 72%, transparent); } /* a light scrim so
  the traces don't run through the table text; the plate stays a line drawing */
.plate > .corner { position: absolute; width: 15px; height: 15px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent); pointer-events: none; }
.plate > .corner::before { content: ""; position: absolute; left: 7px; top: 0; width: 1px; height: 100%; background: currentColor; }
.plate > .corner::after  { content: ""; position: absolute; top: 7px; left: 0; width: 100%; height: 1px; background: currentColor; }
.plate > .corner.tl { top: -8px; left: -8px; }
.plate > .corner.tr { top: -8px; right: -8px; }
.plate > .corner.bl { bottom: -8px; left: -8px; }
.plate > .corner.br { bottom: -8px; right: -8px; }
.title-block { display: flex; flex-wrap: wrap; align-items: stretch;
  border-bottom: 1px solid var(--color-divider); }
.title-block > span { padding: var(--half) var(--leading);
  font-size: 13px; line-height: var(--leading); letter-spacing: 0.08em;
  text-transform: uppercase; font-weight: 600; font-feature-settings: "tnum" 1; }
.tb-title { flex: 1; min-width: 16ch; }
.tb-cell { border-left: 1px solid var(--color-divider); white-space: nowrap;
  color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.spec { table-layout: fixed; }
.spec col.c-num { width: calc(3 * var(--leading)); }
.spec col.c-val { width: 28%; }
.spec th, .spec td { padding: var(--half) var(--leading) var(--half) 0; vertical-align: middle; }
.spec th:first-child, .spec td:first-child { padding-left: var(--leading); }
.spec th { font-size: 13px; line-height: var(--half); font-weight: 600;
  color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.spec td { font-size: 15px; line-height: var(--leading); }
.spec .s-num { font-size: 13px; font-weight: 600; letter-spacing: 0.08em;
  color: var(--color-accent-400); font-feature-settings: "tnum" 1; }
.spec .s-val { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 22px; line-height: var(--leading); letter-spacing: 0.02em;
  text-transform: uppercase; white-space: nowrap; }
.spec .s-rem { color: color-mix(in srgb, var(--color-text) 78%, transparent); }
.spec tbody tr:last-child td { border-bottom: 0; }
.spec tbody tr:hover { background: none; }
.sheet-note { margin: 0; padding: var(--half) var(--leading);
  border-top: 1px solid var(--color-divider);
  font-size: 13px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 70%, transparent); }

/* — contact (03) — */
.close { padding: calc(2 * var(--leading)) 0 calc(2.5 * var(--leading)); }
.close h3 { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 24px; line-height: var(--leading); letter-spacing: 0.02em; text-transform: uppercase;
  margin: 0; text-box: trim-both cap alphabetic; }
.close .sub { font-size: 15px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
  margin: calc(var(--leading) - 1cap) 0 0; max-width: var(--measure); text-box: trim-both cap alphabetic; }
.close .row { display: flex; gap: var(--space-3); flex-wrap: wrap; align-items: center;
  margin-top: var(--leading); }
.close .btn { text-decoration: none; }
footer { padding: calc(2 * var(--leading)) 0; font-size: 13px; line-height: var(--leading);
  color: color-mix(in srgb, var(--color-text) 70%, transparent); }
footer a { color: inherit; }
footer a:hover { color: var(--color-accent-300); }

/* — responsive collapse — */
@media (max-width: 720px) {
  .hero { padding-top: calc(2.5 * var(--leading)); }
  .tb-title { flex-basis: 100%; border-bottom: 1px solid var(--color-divider); }
  .title-block > .tb-cell { padding-inline: var(--half); flex: 1 0 auto; }
  .tb-title + .tb-cell { border-left: 0; padding-left: var(--leading); }
  .spec thead { position: absolute; width: 1px; height: 1px; overflow: hidden;
    clip-path: inset(50%); white-space: nowrap; }
  .spec, .spec tbody, .spec td { display: block; }
  .spec tr { display: grid; grid-template-columns: max-content 1fr;
    column-gap: var(--half); row-gap: var(--half); align-items: baseline;
    padding: var(--leading);
    border-bottom: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent); }
  .spec tr:last-child { border-bottom: 0; }
  .spec th, .spec td { padding: 0; border: 0; }
  .spec th:first-child, .spec td:first-child { padding-left: 0; }
  .spec .s-num { grid-column: 1; }
  .spec .s-val { grid-column: 2; white-space: normal; }
  .spec .s-rem { grid-column: 1 / -1; }
}
@media (max-width: 360px) {
  .title-block { display: grid; grid-template-columns: 1fr 1fr; }
  .tb-title { grid-column: 1 / -1; border-bottom: 0; }
  .title-block > .tb-cell { border-left: 0; border-top: 1px solid var(--color-divider);
    padding-left: var(--leading); }
  .tb-title + .tb-cell + .tb-cell { border-left: 1px solid var(--color-divider);
    padding-left: var(--half); }
  .tb-cell:last-child { grid-column: 1 / -1; }
}

/* ══ Multi-page additions (2026-10-20). Same tokens and blueprint vocabulary as the July page. ══ */
.nav { flex-wrap: wrap; row-gap: var(--space-2); }
.nav-brand a { color: inherit; text-decoration: none; }
@media (max-width: 480px) { .nav a { display: inline; } .nav .btn { display: none; } }
.skip { position: absolute; left: -999px; top: 0; z-index: 10; background: var(--color-accent); color: var(--color-bg); padding: 8px 12px; }
.skip:focus { left: 12px; top: 12px; }
.hero .display, .page-head .display { text-shadow: 0 0 18px #0d0f11, 0 0 4px #0d0f11; }
.hero .sub, .page-head .sub { text-shadow: 0 0 10px #0d0f11, 0 0 3px #0d0f11; }
.kicker, .close h3, .close .sub { text-shadow: 0 0 8px #0d0f11, 0 0 2px #0d0f11; }
.page-head { padding: calc(3 * var(--leading)) 0 calc(1.5 * var(--leading)); }
.page-head .display { font-size: clamp(40px, 6vw, 76px); line-height: 1.04; }
.page-head .sub { font-size: 16px; line-height: var(--leading); max-width: var(--measure); margin: var(--leading) 0 0; }
.section { padding: calc(1.5 * var(--leading)) 0; }
/* A scrim panel: the plate's hairline frame and corners, dark enough that the background never runs through text. */
.panel { position: relative; border: 1px solid var(--color-divider);
  background: color-mix(in srgb, #0d0f11 84%, transparent); padding: var(--leading); }
.panel > .corner { position: absolute; width: 15px; height: 15px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent); pointer-events: none; }
.panel > .corner::before { content: ""; position: absolute; left: 7px; top: 0; width: 1px; height: 100%; background: currentColor; }
.panel > .corner::after  { content: ""; position: absolute; top: 7px; left: 0; width: 100%; height: 1px; background: currentColor; }
.panel > .corner.tl { top: -8px; left: -8px; } .panel > .corner.tr { top: -8px; right: -8px; }
.panel > .corner.bl { bottom: -8px; left: -8px; } .panel > .corner.br { bottom: -8px; right: -8px; }
.panel p, .panel li { font-size: 15px; line-height: var(--leading); max-width: var(--measure); }
.panel p:last-child { margin-bottom: 0; }
.panel h2, .panel h3 { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  text-transform: uppercase; letter-spacing: 0.02em; font-size: 22px; line-height: var(--leading); margin: var(--leading) 0 var(--half); }
.panel h2:first-of-type, .panel h3:first-of-type { margin-top: 0; }
.panel ul { padding-left: 20px; margin: 0 0 var(--space-3); }
.panel .meta { font-size: 13px; color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: calc(1.5 * var(--leading)); }
.row-line { display: flex; justify-content: space-between; align-items: center; gap: var(--space-4);
  padding: var(--half) 0; border-bottom: 1px solid var(--color-divider); }
.row-line:last-child { border-bottom: 0; }
.tag { border: 1px solid var(--color-accent-400); color: var(--color-accent-300); font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase; padding: 2px 8px; }
.panel a, .close a:not(.btn), .page-head a { color: var(--color-accent-300); }
.panel .btn-primary, .close .btn-primary { color: var(--color-bg); }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-4); margin-bottom: var(--half); }
.footer-links a { text-decoration: none; }
.sheet > h2 { font-family: var(--font-heading); font-weight: var(--font-heading-weight); text-transform: uppercase;
  letter-spacing: 0.02em; font-size: 22px; line-height: var(--leading); margin: 0 0 var(--leading); text-shadow: 0 0 10px #0d0f11; }
.panel > .tag { display: inline-block; margin-bottom: var(--half); }