/* ============================================================================
   Cortessa marketing site — self-contained styles.
   No CDNs, no trackers. Typefaces are SELF-HOSTED (IBM Plex Sans / Plex Mono,
   OFL-licensed, vendored in assets/fonts/ — the same faces the product ships),
   with a system-stack fallback. Light/dark aware; WCAG 2.2 AA; reduced-motion
   respected.

   Design system implements the two research briefs (2026-07-19):
   - drafts/design-research/web-layout-frontend.md
   - drafts/design-research/b2b-communication.md

   Brand palette (from the Cortessa mark):
     navy #0b121c · cyan #5cd2e6 · navy surfaces #16202e/#26384f · near-white #e8eef4

   CRITICAL contrast rule (accessibility): bright cyan #5cd2e6 is a
   DARK-BACKGROUND-ONLY accent — 1.78:1 on white, it fails WCAG. It is used
   only on navy contexts (header/footer chrome, .invert sections, the Verified
   state on dark). On light sections, text/links/markers/focus are navy/near-ink.
   ============================================================================ */

/* ---- Vendored brand faces (match the product console) ---------------------
   Weights on disk: Sans 400/500/600 · Mono 400/600. There is no 700 file —
   headings use 600 so browsers never synthesise a faux bold.                 */
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/PlexSans-Regular.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/PlexSans-Medium.woff2") format("woff2");
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/PlexSans-SemiBold.woff2") format("woff2");
  font-weight: 600 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/PlexMono-Regular.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/PlexMono-SemiBold.woff2") format("woff2");
  font-weight: 600 700; font-style: normal; font-display: swap;
}

:root {
  color-scheme: light dark;

  /* ---- Type families ------------------------------------------------------ */
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "Cascadia Code",
               Menlo, Consolas, monospace;

  /* ---- Spacing scale (8px base, per web-layout §2) ------------------------ */
  --space-1: 0.25rem;   /* 4  */
  --space-2: 0.5rem;    /* 8  */
  --space-3: 0.75rem;   /* 12 */
  --space-4: 1rem;      /* 16 */
  --space-5: 1.5rem;    /* 24 */
  --space-6: 2rem;      /* 32 */
  --space-7: 3rem;      /* 48 */
  --space-8: 4rem;      /* 64 */
  --space-9: 6rem;      /* 96 */
  --space-10: 8rem;     /* 128 */

  /* ---- Type scale (1.25 modular, 18px body, per web-layout §3) ------------ */
  --fs-100: 0.875rem;   /* 14 – fine print            */
  --fs-200: 1rem;       /* 16 – small                 */
  --fs-300: 1.125rem;   /* 18 – body                  */
  --fs-400: 1.375rem;   /* 22 – lede / h4             */
  --fs-500: 1.75rem;    /* 28 – h3                    */
  --fs-700: 2.75rem;    /* 44 – h2                    */
  --fs-800: 3.4375rem;  /* 55 – h1                    */

  /* Fluid headings clamp between mobile and desktop steps of the scale. */
  --h1: clamp(2.25rem, 1.4rem + 3.6vw, 3.4375rem);   /* 36 → 55 */
  --h2: clamp(1.75rem, 1.25rem + 2.2vw, 2.75rem);    /* 28 → 44 */
  --h3: clamp(1.375rem, 1.2rem + 0.8vw, 1.75rem);    /* 22 → 28 */
  --lede: clamp(1.25rem, 1.1rem + 0.7vw, 1.5rem);    /* 20 → 24 */

  /* ---- Layout ------------------------------------------------------------- */
  --maxw: 75rem;                                     /* ~1200px container   */
  --measure: 66ch;                                   /* prose line length   */
  --section-pad: clamp(3.5rem, 7vw, 6rem);           /* 56 → 96 vertical    */
  --gap: clamp(1rem, 2.5vw, 2rem);
  --gutter: clamp(1.25rem, 5vw, 2rem);

  /* ---- Radius / depth / motion (web-layout §8) --------------------------- */
  --radius: 8px;
  --radius-sm: 6px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(11, 18, 28, .06), 0 4px 12px rgba(11, 18, 28, .07);
  --shadow-md: 0 2px 4px rgba(11, 18, 28, .08), 0 12px 28px rgba(11, 18, 28, .10);
  --transition: 180ms ease;

  /* ---- Light theme (default) --------------------------------------------- */
  --bg: #ffffff;
  --bg-band: #f2f6f9;        /* subtle neutral tint for light alternation   */
  --surface: #ffffff;
  --surface-2: #f7fafc;
  --border: #d3dde5;         /* hairline; >3:1 vs white for control edges   */
  --border-strong: #b6c4d0;
  --text: #12181f;           /* ~16:1 on white                              */
  --text-muted: #45525f;     /* ~7.5:1 on white                             */
  --accent: #123a5c;         /* navy-blue interactive ink; ~9:1 on white    */
  --accent-strong: #0b121c;  /* brand navy — primary button fill on light   */
  --accent-ink: #ffffff;
  --focus: #0b3352;          /* navy focus ring; ~11:1 on white             */

  --verified: #0b5c6b;       /* dark teal "verified" — AA on light          */
  --draft: #8a5a00;          /* amber-brown                                 */
  --refused: #a12222;        /* red                                         */

  /* ---- Fixed brand-dark chrome + .invert (navy) sections ----------------- */
  /* Constant across themes so bright cyan is only ever on navy.             */
  --nav-bg: #0b121c;
  --nav-surface: #16202e;    /* card surface on navy                        */
  --nav-surface-2: #1b2838;
  --nav-text: #e8eef4;       /* ~17:1 on navy                               */
  --nav-muted: #c2cedb;      /* ~12:1 on navy                               */
  --nav-border: #2b3d54;     /* >3:1 delineation on navy                    */
  --nav-accent: #5cd2e6;     /* bright cyan; ~10.6:1 on navy                */
  --nav-accent-ink: #05222b; /* navy ink on cyan fill; ~10.6:1              */
  --nav-focus: #7fe0f0;      /* bright cyan focus ring on navy              */

  --nav-verified: #5cd2e6;
  --nav-draft: #e6b74e;
  --nav-refused: #f28b8b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b121c;
    --bg-band: #111b27;
    --surface: #16202e;
    --surface-2: #1b2838;
    --border: #2b3d54;
    --border-strong: #3a4f68;
    --text: #e8eef4;
    --text-muted: #aeb9c7;     /* ~9:1 on navy                             */
    --accent: #5cd2e6;         /* on dedicated dark page, cyan is safe     */
    --accent-strong: #5cd2e6;
    --accent-ink: #05222b;
    --focus: #7fe0f0;

    --verified: #5cd2e6;
    --draft: #e6b74e;
    --refused: #f28b8b;
  }
}

/* ============================================================================
   Base
   ============================================================================ */
* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 5.5rem;   /* keeps anchor targets clear of sticky header */
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-300);
  line-height: 1.5;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  line-height: 1.15;
  font-weight: 600; /* Plex SemiBold — heaviest vendored weight; no faux bold */
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: balance;
}
h1 { font-size: var(--h1); margin: 0 0 var(--space-4); }
h2 { font-size: var(--h2); margin: 0 0 var(--space-4); }
h3 { font-size: var(--h3); font-weight: 600; margin: 0 0 var(--space-3); }
h4 { font-size: var(--fs-400); font-weight: 600; margin: 0 0 var(--space-2); }

p { margin: 0 0 var(--space-4); }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration: underline; }

strong { font-weight: 600; }

img, svg { max-width: 100%; height: auto; }

[id] { scroll-margin-top: 5.5rem; }

/* ============================================================================
   Layout helpers
   ============================================================================ */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.measure { max-width: var(--measure); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ============================================================================
   Focus + skip link (WCAG 2.2 §2.4.11 / 2.4.13)
   ============================================================================ */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute; left: 1rem; top: -4rem;
  background: var(--nav-accent); color: var(--nav-accent-ink);
  padding: var(--space-3) var(--space-4); border-radius: var(--radius);
  z-index: 100; transition: top var(--transition); text-decoration: none; font-weight: 600;
}
.skip-link:focus { top: 1rem; text-decoration: none; }

/* ============================================================================
   Header / nav (fixed brand-dark chrome)
   ============================================================================ */
.site-header {
  background: var(--nav-bg);
  color: var(--nav-text);
  border-bottom: 1px solid var(--nav-border);
  position: sticky; top: 0; z-index: 50;
  transition: box-shadow var(--transition);
}
.site-header.is-scrolled { box-shadow: 0 2px 12px rgba(0, 0, 0, .35); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 4rem; gap: var(--space-4); }

.brand { display: inline-flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--nav-text); font-weight: 600; }
.brand-logo { width: 2.25rem; height: 2.25rem; display: block; } /* transparent jewel mark — no tile radius */
.brand-name { font-size: var(--fs-400); letter-spacing: 0.01em; color: var(--nav-text); }

.site-nav { display: flex; align-items: center; }
.nav-menu { list-style: none; display: flex; gap: var(--space-2); align-items: center; margin: 0; padding: 0; }
.nav-menu a {
  color: var(--nav-text); text-decoration: none; font-size: var(--fs-200);
  padding: 0.5rem 0.6rem; border-radius: var(--radius-sm);
  display: inline-flex; align-items: center; min-height: 2.25rem;
  transition: background var(--transition), color var(--transition);
}
.nav-menu a:hover { text-decoration: none; background: rgba(92, 210, 230, .1); color: #ffffff; }
.nav-cta {
  background: var(--nav-accent); color: var(--nav-accent-ink) !important;
  font-weight: 600; margin-left: var(--space-2);
}
.nav-cta:hover { background: #7fe0f0 !important; color: var(--nav-accent-ink) !important; }

.site-header :focus-visible { outline-color: var(--nav-focus); }

.nav-toggle {
  display: none; width: 2.75rem; height: 2.75rem; border: 1px solid var(--nav-border);
  background: transparent; border-radius: var(--radius); cursor: pointer;
  align-items: center; justify-content: center; color: var(--nav-text);
}
.nav-toggle-bar, .nav-toggle-bar::before, .nav-toggle-bar::after {
  content: ""; display: block; width: 1.15rem; height: 2px; background: currentColor; position: relative;
}
.nav-toggle-bar::before { position: absolute; top: -6px; }
.nav-toggle-bar::after { position: absolute; top: 6px; }

@media (max-width: 46rem) {
  .nav-toggle { display: inline-flex; }
  .nav-menu {
    position: absolute; top: 4rem; right: 0; left: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--nav-bg); border-bottom: 1px solid var(--nav-border);
    padding: var(--space-2) var(--gutter) var(--space-4);
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu li { padding: 0; }
  .nav-menu a { display: block; padding: 0.65rem 0.6rem; min-height: 2.75rem; }
  .nav-cta { text-align: center; justify-content: center; margin: var(--space-2) 0 0; }
}

/* ============================================================================
   Buttons
   ============================================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.75rem 1.4rem; border-radius: var(--radius);
  font-weight: 600; font-size: var(--fs-200); line-height: 1.3;
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  min-height: 2.75rem;
  transition: background var(--transition), border-color var(--transition),
              color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-primary { background: var(--accent-strong); color: var(--accent-ink); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: #1c2c42; text-decoration: none; box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--accent); background: var(--surface-2); text-decoration: none; }

/* Buttons inside navy contexts flip to the brand cyan/navy pairing. */
.invert .btn-primary, .cta-band .btn-primary {
  background: var(--nav-accent); color: var(--nav-accent-ink); box-shadow: none;
}
.invert .btn-primary:hover, .cta-band .btn-primary:hover { background: #7fe0f0; transform: translateY(-1px); }
.invert .btn-ghost, .cta-band .btn-ghost { color: var(--nav-text); border-color: var(--nav-border); }
.invert .btn-ghost:hover, .cta-band .btn-ghost:hover { border-color: var(--nav-accent); background: rgba(92, 210, 230, .08); }

@media (prefers-color-scheme: dark) {
  .btn-primary { background: var(--nav-accent); color: var(--nav-accent-ink); }
  .btn-primary:hover { background: #7fe0f0; }
  .btn-ghost { color: var(--text); border-color: var(--border-strong); }
}

/* ============================================================================
   Sections + rhythm
   ============================================================================ */
.section { padding-block: var(--section-pad); }

/* Subtle neutral alternation on light. */
.band { background: var(--bg-band); border-block: 1px solid var(--border); }

/* Full navy "chapter" — where cyan and white text do their work (web-layout §5/§6).
   A faint guilloche tile (the product's security-print motif) textures the ground. */
.invert {
  background: var(--nav-bg) url("../img/guilloche_tile.svg") repeat;
  color: var(--nav-text);
  border-block: 1px solid var(--nav-border);
}
.invert h1, .invert h2, .invert h3, .invert h4 { color: var(--nav-text); }
.invert p { color: var(--nav-text); }
.invert .section-intro { color: var(--nav-muted); }
.invert a { color: var(--nav-accent); }
.invert :focus-visible { outline-color: var(--nav-focus); }

.section-intro { max-width: var(--measure); color: var(--text-muted); font-size: var(--lede); line-height: 1.5; }

.eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase; letter-spacing: 0.12em; font-size: var(--fs-100);
  font-weight: 600; color: var(--accent); margin: 0 0 var(--space-3);
}
.invert .eyebrow { color: var(--nav-accent); }

/* ============================================================================
   Hero (home) — left aligned, eyebrow → H1 → sub-line → CTA → trust cue.
   A guilloche security-print field (the product's own motif) sits behind the
   brand mark on the right; both are decorative and hidden from AT.
   ============================================================================ */
.hero {
  padding-block: clamp(3.5rem, 9vw, 7rem) clamp(2.5rem, 5vw, 4rem);
  position: relative; overflow: hidden;
}
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center;
}
.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; min-height: 16rem; }
.hero-visual::before {
  /* guilloche rosette field behind the mark */
  content: ""; position: absolute; inset: -18%;
  background: url("../img/guilloche.svg") center / contain no-repeat;
  opacity: 0.55; pointer-events: none;
}
.hero-mark {
  position: relative; width: clamp(13rem, 24vw, 19rem); height: auto;
  filter: drop-shadow(0 12px 32px rgba(11, 18, 28, .18));
}
.hero h1 { max-width: 18ch; }
.lede { font-size: var(--lede); line-height: 1.5; color: var(--text-muted); max-width: 46ch; margin-bottom: var(--space-5); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin: 0 0 var(--space-6); }

@media (max-width: 60rem) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; min-height: 0; margin-bottom: var(--space-4); justify-content: flex-start; }
  .hero-visual::before { inset: -30% -10%; }
  .hero-mark { width: clamp(8rem, 30vw, 11rem); }
}

.proof-strip {
  list-style: none; display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5);
  align-items: center; margin: 0; padding: var(--space-4) 0 0;
  border-top: 1px solid var(--border);
  font-size: var(--fs-200); color: var(--text-muted);
}
.proof-tag { font-family: var(--font-mono); font-weight: 600; }
.proof-tag.verified { color: var(--verified); }
.proof-tag.draft { color: var(--draft); }
.proof-tag.refused { color: var(--refused); }
.invert .proof-tag.verified { color: var(--nav-verified); }
.invert .proof-tag.draft { color: var(--nav-draft); }
.invert .proof-tag.refused { color: var(--nav-refused); }

/* ============================================================================
   Interior page hero
   ============================================================================ */
.page-hero { padding-block: clamp(2.75rem, 6vw, 4.5rem) clamp(1.75rem, 4vw, 2.75rem); border-bottom: 1px solid var(--border); }
.page-hero h1 { max-width: 20ch; }
.page-hero .lede { max-width: var(--measure); margin-bottom: 0; }

/* ============================================================================
   Prose
   ============================================================================ */
.prose { max-width: var(--measure); }
.prose p { line-height: 1.6; }
.prose h2 { margin-top: var(--space-7); }
.prose h3 { margin-top: var(--space-6); }
.prose ul, .prose ol { padding-left: 1.25rem; margin: 0 0 var(--space-5); }
.prose li { margin-bottom: var(--space-2); line-height: 1.6; }
.prose li::marker { color: var(--accent); }
.invert .prose li::marker { color: var(--nav-accent); }

/* ============================================================================
   Cards — gate / capability / generic (3-up, equal height)
   ============================================================================ */
.gate-grid, .cap-grid, .card-grid {
  display: grid; gap: var(--gap);
  grid-template-columns: repeat(3, 1fr); margin-top: var(--space-6);
}
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.gate-card, .card, .cap-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.card:hover, .cap-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.invert .gate-card, .invert .card, .invert .cap-card {
  background: var(--nav-surface); border-color: var(--nav-border); box-shadow: none;
}
.invert .card h3, .invert .cap-card h3, .invert .gate-card { color: var(--nav-text); }
.invert .card p, .invert .cap-card p { color: var(--nav-muted); }

.gate-card .proof-tag { display: inline-block; margin-bottom: var(--space-2); font-size: var(--fs-400); }
.gate-card p { margin: 0; color: var(--text-muted); }
.invert .gate-card p { color: var(--nav-muted); }

.card h3 { margin-top: 0; }
.card p { color: var(--text-muted); }
.card p:last-child { margin-bottom: 0; }

/* Capability cards */
.cap-card { padding: var(--space-6); display: flex; flex-direction: column; }
.cap-card h3 { margin-top: 0; }
.cap-card p { color: var(--text-muted); }
.cap-lead { border-color: var(--accent); border-width: 1px; box-shadow: var(--shadow-md); position: relative; }
.cap-lead::before {
  content: ""; position: absolute; inset-block: 0; left: 0; width: 4px;
  background: var(--accent); border-radius: var(--radius) 0 0 var(--radius);
}
.invert .cap-lead { border-color: var(--nav-accent); }
.invert .cap-lead::before { background: var(--nav-accent); }
.cap-badge {
  display: inline-block; font-family: var(--font-mono); font-size: var(--fs-100);
  font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--accent-ink); background: var(--accent);
  padding: 0.2rem 0.6rem; border-radius: var(--radius-pill); margin-bottom: var(--space-3); align-self: flex-start;
}
.invert .cap-badge { color: var(--nav-accent-ink); background: var(--nav-accent); }
.cap-metric {
  color: var(--text-muted); font-size: var(--fs-200); line-height: 1.5;
  border-top: 1px solid var(--border); padding-top: var(--space-3);
  margin-top: auto; margin-bottom: 0;
}
.invert .cap-metric { color: var(--nav-muted); border-color: var(--nav-border); }
.cap-status {
  display: inline-block; font-family: var(--font-mono); font-size: var(--fs-100);
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--draft); border: 1px solid currentColor; border-radius: var(--radius-pill);
  padding: 0.05rem 0.5rem; vertical-align: middle; margin-left: 0.4rem;
}
.invert .cap-status { color: var(--nav-draft); }

/* ============================================================================
   Stat / proof strip (web-layout §5) — navy band, cyan numbers, qualifier under
   ============================================================================ */
.stat-strip {
  list-style: none; margin: var(--space-6) 0 0; padding: 0;
  display: grid; gap: var(--gap); grid-template-columns: repeat(4, 1fr);
}
.stat-strip li {
  border-top: 2px solid var(--nav-accent); padding-top: var(--space-3);
}
.stat-num {
  display: block; font-family: var(--font-mono);
  font-size: clamp(1.85rem, 1.3rem + 2.2vw, 2.6rem);
  font-weight: 600; letter-spacing: -0.02em; color: var(--nav-accent); line-height: 1.05;
  font-variant-numeric: tabular-nums;
}
.stat-label { display: block; margin-top: var(--space-2); font-size: var(--fs-200); line-height: 1.45; color: var(--nav-muted); }
.stat-note { margin-top: var(--space-6); font-size: var(--fs-200); color: var(--nav-muted); }

/* ============================================================================
   Numbered steps
   ============================================================================ */
.steps { list-style: none; counter-reset: step; margin: var(--space-6) 0; padding: 0; display: grid; gap: var(--space-4); }
.steps > li {
  position: relative; padding: var(--space-5) var(--space-5) var(--space-5) 3.75rem;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.invert .steps > li { background: var(--nav-surface); border-color: var(--nav-border); box-shadow: none; }
.steps > li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: var(--space-4); top: var(--space-5);
  width: 2rem; height: 2rem; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 600; font-size: var(--fs-200);
}
.invert .steps > li::before { background: var(--nav-accent); color: var(--nav-accent-ink); }
.steps h3 { margin: 0 0 var(--space-1); font-size: var(--fs-400); }
.steps p { margin: 0; color: var(--text-muted); }
.invert .steps h3 { color: var(--nav-text); }
.invert .steps p { color: var(--nav-muted); }

/* ============================================================================
   Split / defence section
   ============================================================================ */
.defence-inner, .split { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.split.even { grid-template-columns: 1fr 1fr; }
.tier-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); }
.tier-list li {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: var(--space-4); color: var(--text-muted);
  box-shadow: var(--shadow-sm);
}
.tier-list strong { color: var(--text); }
.invert .tier-list li { background: var(--nav-surface); border-color: var(--nav-border); color: var(--nav-muted); }
.invert .tier-list strong { color: var(--nav-text); }
.text-link { font-weight: 600; }

/* ============================================================================
   Definition-style feature list
   ============================================================================ */
.feature-list { display: grid; gap: var(--space-4); margin: var(--space-6) 0 0; padding: 0; list-style: none; }
.feature-list li { padding-left: 1.6rem; position: relative; color: var(--text-muted); line-height: 1.55; }
.feature-list li::before {
  content: ""; position: absolute; left: 0; top: 0.5em;
  width: 0.6rem; height: 0.6rem; border-radius: 2px; background: var(--accent);
}
.feature-list strong { color: var(--text); }
.invert .feature-list li { color: var(--nav-muted); }
.invert .feature-list li::before { background: var(--nav-accent); }
.invert .feature-list strong { color: var(--nav-text); }

/* ============================================================================
   Note / callout
   ============================================================================ */
.note {
  background: var(--bg-band); border: 1px solid var(--border); border-left: 4px solid var(--accent);
  border-radius: var(--radius); padding: var(--space-4) var(--space-5); margin: var(--space-6) 0 0;
  max-width: var(--measure);
}
.note p:last-child { margin-bottom: 0; }
.note .note-label { font-weight: 700; color: var(--text); }
.invert .note { background: var(--nav-surface); border-color: var(--nav-border); border-left-color: var(--nav-accent); }
.invert .note p { color: var(--nav-muted); }
.invert .note .note-label { color: var(--nav-text); }

/* Owner-to-confirm marker */
.tbc {
  font-style: normal; font-weight: 600; font-size: 0.85em;
  color: var(--draft); border: 1px dashed currentColor; border-radius: 4px; padding: 0 0.35em; white-space: nowrap;
}

/* ============================================================================
   Legal pages
   ============================================================================ */
.draft-banner {
  background: #fff3cd; color: #3d2c00;
  border: 2px solid #8a5a00; border-left-width: 8px;
  border-radius: var(--radius); padding: 1.1rem 1.25rem; margin: var(--space-6) 0 0;
}
.draft-banner .draft-flag {
  display: inline-block; text-transform: uppercase; letter-spacing: 0.05em;
  font-weight: 800; font-size: 0.8rem; line-height: 1.3;
  background: #8a5a00; color: #ffffff; padding: 0.2rem 0.55rem; border-radius: 4px; margin-bottom: 0.6rem;
}
.draft-banner p { margin: 0 0 0.5rem; }
.draft-banner p:last-child { margin-bottom: 0; }
.draft-banner strong { color: inherit; }
@media (prefers-color-scheme: dark) {
  .draft-banner { background: #2a2000; color: #ffe9b0; border-color: #e6b74e; }
  .draft-banner .draft-flag { background: #e6b74e; color: #2a1a00; }
}

code.placeholder {
  font-family: ui-monospace, SFMono-Regular, "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 0.88em; white-space: normal; word-break: break-word;
  background: var(--bg-band); color: var(--text);
  border: 1px dashed var(--draft); border-radius: 4px; padding: 0.05em 0.35em;
}
.legal code:not(.placeholder) {
  font-family: ui-monospace, SFMono-Regular, "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 0.9em; background: var(--bg-band); border: 1px solid var(--border);
  border-radius: 4px; padding: 0.05em 0.3em;
}
.legal { max-width: 70ch; }
.legal p, .legal li { line-height: 1.6; }
.legal h2 { margin-top: var(--space-7); }
.legal h3 { margin-top: var(--space-6); }
.legal ul, .legal ol { padding-left: 1.25rem; margin: 0 0 var(--space-5); }
.legal li { margin-bottom: var(--space-2); }
.legal li::marker { color: var(--accent); }
.legal hr { border: 0; border-top: 1px solid var(--border); margin: var(--space-6) 0; }
.legal a { word-break: break-word; }
.legal blockquote {
  margin: var(--space-6) 0; padding: var(--space-4) var(--space-5);
  background: var(--bg-band); border: 1px solid var(--border); border-left: 4px solid var(--accent);
  border-radius: var(--radius); color: var(--text);
}
.legal blockquote p:last-child { margin-bottom: 0; }

.table-scroll { overflow-x: auto; margin: var(--space-5) 0; }
.legal-table { width: 100%; border-collapse: collapse; font-size: var(--fs-200); min-width: 34rem; }
.legal-table th, .legal-table td {
  border: 1px solid var(--border); padding: 0.6rem 0.7rem; text-align: left; vertical-align: top;
}
.legal-table th { background: var(--bg-band); color: var(--text); font-weight: 700; }

/* ============================================================================
   CTA band (navy)
   ============================================================================ */
.cta-band {
  background: var(--nav-bg) url("../img/guilloche_tile.svg") repeat;
  color: var(--nav-text); border-block: 1px solid var(--nav-border);
}
.cta-inner { text-align: center; max-width: 46rem; margin-inline: auto; }
.cta-band h2 { color: var(--nav-text); }
.cta-band p { color: var(--nav-muted); max-width: 52ch; margin-inline: auto; margin-bottom: var(--space-5); font-size: var(--lede); }
.cta-band .hero-actions { justify-content: center; margin-bottom: 0; }
.cta-band :focus-visible { outline-color: var(--nav-focus); }

/* ============================================================================
   Contact
   ============================================================================ */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: var(--gap); align-items: start; margin-top: var(--space-2); }
.contact-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: var(--space-6); box-shadow: var(--shadow-sm);
}
.contact-card h2 { margin-top: 0; font-size: var(--h3); }
.field { display: grid; gap: 0.35rem; margin-bottom: var(--space-4); }
.field label { font-weight: 600; }
.field input, .field textarea, .field select {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--border-strong); border-radius: var(--radius); padding: 0.6rem 0.7rem; width: 100%;
}
.field textarea { min-height: 8rem; resize: vertical; }
.field .hint { font-size: var(--fs-200); color: var(--text-muted); }

/* ============================================================================
   Footer (fixed brand-dark chrome) — multi-column sitemap
   ============================================================================ */
.site-footer {
  background: var(--nav-bg); color: var(--nav-text);
  border-top: 1px solid var(--nav-border); padding: var(--space-8) 0 var(--space-5); margin-top: 0;
}
.site-footer .brand-name { color: var(--nav-text); }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--gap); }
.footer-brand { display: grid; gap: var(--space-2); align-content: start; }
.footer-brand .footer-brand-row { display: inline-flex; align-items: center; gap: var(--space-3); }
.footer-brand p { color: var(--nav-muted); margin: 0; max-width: 34ch; }
.footer-col-title {
  font-family: var(--font-mono); font-size: var(--fs-100);
  text-transform: uppercase; letter-spacing: 0.1em;
  font-weight: 600; color: var(--nav-muted); margin: 0 0 var(--space-3);
}
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.15rem; }
.footer-links a {
  color: var(--nav-muted); text-decoration: none;
  display: inline-flex; align-items: center; min-height: 1.75rem; padding: 0.15rem 0;
}
.footer-links a:hover { color: var(--nav-text); text-decoration: underline; }
.site-footer :focus-visible { outline-color: var(--nav-focus); }
.footer-fine { margin-top: var(--space-7); padding-top: var(--space-4); border-top: 1px solid var(--nav-border); }
.footer-fine p { color: var(--nav-muted); font-size: var(--fs-200); margin: 0; }

/* ============================================================================
   Responsive
   ============================================================================ */
@media (max-width: 60rem) {
  .gate-grid, .cap-grid, .card-grid, .card-grid.cols-2 { grid-template-columns: 1fr 1fr; }
  .stat-strip { grid-template-columns: 1fr 1fr; }
  .defence-inner, .split, .split.even, .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 40rem) {
  .gate-grid, .cap-grid, .card-grid, .card-grid.cols-2 { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
}

/* ============================================================================
   The appliance (concept) — media-led section on .invert (navy) ground.
   Renders are dark, so they sit on navy with a hairline nav-border frame.
   ============================================================================ */
.appliance-media { margin-top: var(--space-7); }
.appliance-media img,
.appliance-thumbs img {
  display: block; width: 100%; height: auto;
  border-radius: var(--radius); border: 1px solid var(--nav-border);
}
.appliance-media figcaption,
.appliance-thumbs figcaption {
  margin-top: var(--space-3); text-align: center;
  font-size: var(--fs-100); color: var(--nav-muted);
}
.appliance-thumbs {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--gap); margin-top: var(--gap);
}
.appliance-thumbs figure { margin: 0; }
@media (max-width: 40rem) {
  .appliance-thumbs { grid-template-columns: 1fr; }
}

/* ============================================================================
   Reduced motion (web-layout §8 / MDN)
   ============================================================================ */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important; scroll-behavior: auto !important;
  }
  .btn:hover, .card:hover, .cap-card:hover { transform: none !important; }
}