/* Kinvergence — shared stylesheet for all pages.

   PALETTE IS PROVISIONAL. --coral/--teal/--violet refined 2026-09-27 to the exact shades sampled
   from the selected flat-dot mark (kinvergence-core docs/brand/03-visual-exploration/selections/
   2026-09-03-001..., 2026-09-27 resolution); --teal/--violet refined again 2026-10-02 to match a
   luminance correction Ed made directly in the mark's now-permanent master file
   (kinvergence-core docs/brand/assets/identity/emblem/master/kinvergence-emblem-tri-spiral-blades-v1.svg)
   — see that repo's docs/brand/04-style-guide/color-system.md for the full rationale and what
   changed. --gold-mark added alongside the existing --gold (kept for its own, unrelated UI uses).
   The full brand pass — candidate marks against the model's Part IV filters, and reconciling the
   three competing palettes — is still postponed, not cancelled. See ROADMAP.md § 3c. */

:root {
  --ink: #2B2B33;
  --ink-soft: #55555f;
  --ink-faint: #7c7c86;
  --paper: #FAF8F4;
  --paper-alt: #F2EDE4;
  --rule: #e2ddd2;
  --slate: #3D5A80;
  --slate-deep: #2f4763;
  --navy-deep: #24384f;
  --gold: #FFD166;
  --gold-mark: #FE9E02;
  --gold-deep: #a97e12;
  --coral: #FD2D30;
  --teal: #019692;
  --violet: #B241D8;
  --measure: 34rem;
  --nav-h: 4.25rem;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 1rem); }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.011em; margin: 0 0 0.75rem; }
h1 { font-size: clamp(1.95rem, 5.2vw, 3.1rem); font-weight: 700; letter-spacing: -0.022em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); font-weight: 700; }
h3 { font-size: 1.1rem; font-weight: 700; }
p { margin: 0 0 1.15rem; }
a { color: var(--slate-deep); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--slate); outline-offset: 3px; border-radius: 2px; }

.wrap { width: 100%; max-width: 62rem; margin: 0 auto; padding: 0 1.5rem; }
.measure { max-width: var(--measure); }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--ink); color: #fff; padding: 0.75rem 1.25rem; border-radius: 0 0 6px 0;
}
.skip:focus { left: 0; }

/* ---------- Navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250, 248, 244, 0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: var(--nav-h);
}
.brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em;
  color: var(--ink); text-decoration: none;
}
.brand img { width: 30px; height: 30px; display: block; }

.nav-links { display: flex; gap: 1.75rem; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: var(--ink-soft); text-decoration: none; font-size: 0.9375rem; font-weight: 500;
  padding: 0.35rem 0; border-bottom: 2px solid transparent;
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); border-bottom-color: var(--gold); }
.nav-links a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--gold); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--rule); border-radius: 6px;
  padding: 0.5rem 0.65rem; cursor: pointer; color: var(--ink);
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: currentColor; border-radius: 2px; }
.nav-toggle span + span { margin-top: 5px; }

/* ---------- Hero (home page) ---------- */
.hero { padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(2.5rem, 6vw, 4.5rem); }
.hero-mark { width: clamp(62px, 11vw, 88px); height: auto; display: block; margin-bottom: 1.75rem; }
.hero h1 { max-width: 22ch; }
.hero-sub {
  font-size: clamp(1.075rem, 2.1vw, 1.3rem);
  color: var(--ink-soft); max-width: 46ch; margin-top: 1.25rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem 1.5rem; align-items: center; margin-top: 2rem; }
.btn {
  display: inline-block; background: var(--ink); color: var(--paper);
  padding: 0.8rem 1.5rem; border-radius: 999px; text-decoration: none;
  font-weight: 600; font-size: 0.9375rem;
  transition: background 0.2s ease, transform 0.2s ease;
}
.btn:hover { background: var(--slate-deep); color: var(--paper); transform: translateY(-1px); }
.btn-quiet { color: var(--ink-soft); font-size: 0.9375rem; }
.hero-note {
  margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--rule);
  font-size: 0.9375rem; color: var(--ink-faint); max-width: 42ch;
}

/* ---------- Interior page header ---------- */
.pagehead { padding: clamp(2.75rem, 6vw, 4.5rem) 0 clamp(1.5rem, 3vw, 2.5rem); }
.pagehead h1 { font-size: clamp(1.8rem, 4.2vw, 2.6rem); max-width: 24ch; }
.pagehead .lede { margin-top: 1rem; max-width: 46ch; }
.pagehead .eyebrow { margin-bottom: 0.75rem; }

/* ---------- Sections ---------- */
section { padding: clamp(3rem, 7vw, 5.5rem) 0; border-top: 1px solid var(--rule); }
section.alt { background: var(--paper-alt); }
section.tight { padding: clamp(2.25rem, 5vw, 3.5rem) 0; }
.eyebrow {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.11em; text-transform: uppercase;
  color: var(--gold-deep); margin: 0 0 0.9rem;
}
.lede { font-size: 1.15rem; color: var(--ink-soft); }

blockquote {
  margin: 1.75rem 0; padding: 0.15rem 0 0.15rem 1.35rem; max-width: var(--measure);
  border-left: 3px solid var(--gold); font-size: 1.0625rem; color: var(--ink);
}
blockquote p { margin-bottom: 0.5rem; }
blockquote cite { display: block; font-style: normal; font-size: 0.875rem; color: var(--ink-faint); }

/* Timeline */
.timeline { list-style: none; margin: 2.5rem 0 0; padding: 0; max-width: 46rem; }
.timeline li {
  display: grid; grid-template-columns: 8.5rem 1fr; gap: 0 1.5rem;
  padding: 1rem 0; border-top: 1px solid var(--rule);
}
.timeline li:last-child { border-bottom: 1px solid var(--rule); }
.timeline .when { font-weight: 700; font-size: 0.9375rem; color: var(--slate-deep); }
.timeline .what { margin: 0; color: var(--ink-soft); }
.timeline .what strong { color: var(--ink); font-weight: 600; }

/* Refusals / limits list */
.stack { list-style: none; margin: 1.5rem 0 0; padding: 0; max-width: 46rem; }
.stack li { padding: 0.95rem 0; border-top: 1px solid var(--rule); color: var(--ink-soft); }
.stack li:last-child { border-bottom: 1px solid var(--rule); }
.stack strong { color: var(--ink); font-weight: 650; }

/* Agenda */
.agenda { counter-reset: step; list-style: none; margin: 1.5rem 0 0; padding: 0; max-width: 44rem; }
.agenda li {
  counter-increment: step; position: relative;
  padding: 0 0 1.35rem 3rem; color: var(--ink-soft);
}
.agenda li::before {
  content: counter(step); position: absolute; left: 0; top: 0.05rem;
  width: 1.9rem; height: 1.9rem; border-radius: 50%;
  background: var(--gold); color: var(--ink);
  display: grid; place-items: center; font-size: 0.875rem; font-weight: 700;
}
.agenda strong { color: var(--ink); font-weight: 650; }

.callout {
  margin: 2.25rem 0 0; padding: 1.5rem 1.65rem;
  background: var(--paper); border: 1px solid var(--rule); border-left: 4px solid var(--slate);
  border-radius: 4px; max-width: 46rem;
}
section.alt .callout { background: var(--paper); }
.callout p:last-child { margin-bottom: 0; }

.more { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--rule); max-width: 46rem; }
.more p { color: var(--ink-soft); }

/* ---------- Cadence diagram ----------
   Twelve columns = twelve weeks. The information is the *pattern* — twelve marks, three marks,
   one unbroken band — so the tracks are aria-hidden and the figcaption states it in words. */
.cadence { margin: 2.25rem 0 0; padding: 0; max-width: 46rem; }
.cadence-rows { list-style: none; margin: 0; padding: 0; }
.cadence-row {
  display: grid; grid-template-columns: 14rem 1fr; gap: 0 1.5rem; align-items: center;
  padding: 1.15rem 0; border-top: 1px solid var(--rule);
}
.cadence-row:last-child { border-bottom: 1px solid var(--rule); }
.cadence-label { font-size: 0.9375rem; color: var(--ink-soft); }
.cadence-label strong { display: block; color: var(--ink); font-weight: 650; font-size: 1rem; }

.cadence-track {
  position: relative; display: grid; grid-template-columns: repeat(12, 1fr);
  align-items: center; height: 1.6rem;
}
.cadence-track::before {
  content: ""; position: absolute; left: 0; right: 0; top: 50%;
  height: 1px; background: var(--rule);
}
.beat { justify-self: center; width: 9px; height: 9px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 3px rgba(255, 209, 102, 0.22); }
.beat-major { justify-self: center; width: 15px; height: 15px; border-radius: 50%; background: var(--slate); }
.beat-band {
  grid-column: 1 / -1; height: 10px; border-radius: 999px;
  background: linear-gradient(90deg, rgba(61,90,128,0.18), rgba(61,90,128,0.42), rgba(61,90,128,0.18));
}
.cadence figcaption { margin-top: 1.35rem; font-size: 0.9375rem; color: var(--ink-soft); max-width: var(--measure); }
.cadence figcaption strong { color: var(--ink); font-weight: 650; }

/* Continue link — the promise that a short section is deliberate rather than thin. */
.onward {
  display: inline-flex; align-items: baseline; gap: 0.5rem;
  margin-top: 1.75rem; font-weight: 650; font-size: 1.0625rem;
  color: var(--slate-deep); text-decoration-thickness: 2px;
}
.onward::after { content: "\2192"; transition: transform 0.15s ease; }
.onward:hover::after { transform: translateX(3px); }

/* ---------- Dark sections (the ask, and interior page equivalents) ---------- */
.dark { background: var(--slate-deep); color: var(--paper); border-top: none; }
.dark h2, .dark h3 { color: var(--paper); }
.dark .eyebrow { color: var(--gold); }
.dark p { color: #d6dfe9; }
.dark strong.bright { color: var(--paper); }
.dark .big { font-size: clamp(1.25rem, 2.7vw, 1.7rem); color: var(--paper); line-height: 1.35; max-width: 26ch; font-weight: 600; }
.dark a { color: var(--gold); }
.dark a:hover { color: #fff; }
.dark .onward { color: var(--gold); }
.dark .stack li { border-color: #4a637f; color: #c6d3e0; }
.dark .stack strong { color: var(--paper); }
.dark .callout { background: #3a5573; border-color: #4d6b8c; border-left-color: var(--gold); }
.dark .callout p { color: #d6dfe9; }
.dark .more { border-color: #4a637f; }

footer {
  background: var(--navy-deep); color: #93a5b8;
  padding: 3rem 0 4rem; border-top: 1px solid #3a5573;
  font-size: 0.9375rem;
}
footer p { max-width: 44rem; color: #a8b8c8; }
footer strong { color: #cfdae6; }
footer a { color: #cfdae6; }
footer a:hover { color: #fff; }
.footer-nav { margin-top: 1.75rem; padding-top: 1.5rem; border-top: 1px solid #3a5573; }
.footer-nav a + a { margin-left: 1.25rem; }

/* ---------- Responsive ---------- */
/* Nav labels lengthened in the 2026-08-27 copy pass; tighten before the toggle takes over. */
@media (max-width: 58rem) {
  .nav-links { gap: 1.1rem; }
  .nav-links a { font-size: 0.875rem; }
}

@media (max-width: 46rem) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--rule);
    padding: 0.5rem 1.5rem 1rem;
  }
  .nav-links.open { display: flex; }
  .nav-links li { border-top: 1px solid var(--rule); }
  .nav-links a { display: block; padding: 0.85rem 0; border-bottom: none; font-size: 1rem; }
  .nav { position: relative; }
  .timeline li { grid-template-columns: 1fr; gap: 0.3rem; }
  .cadence-row { grid-template-columns: 1fr; gap: 0.55rem; }
  .footer-nav a { display: block; margin: 0 0 0.6rem; }
  .footer-nav a + a { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .btn:hover { transform: none; }
  .onward:hover::after { transform: none; }
}