/* ============================================================================
   HOW TO SPEAK SERIES — BASE STYLES
   Depends on tokens.css. WCAG AA targeted: contrast, visible focus, keyboard
   nav, reduced-motion. Dark-dominant shell; light "paper" sections for long copy.
   ============================================================================ */

/* --- Reset / base ------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { margin: 0 0 var(--s-4); line-height: var(--lh-snug); font-weight: 800; }
h1 { font-size: var(--fs-h1); line-height: var(--lh-tight); letter-spacing: var(--track-tight); }
h2 { font-size: var(--fs-h2); letter-spacing: var(--track-tight); }
h3 { font-size: var(--fs-h3); }
p  { margin: 0 0 var(--s-4); }
ul, ol { margin: 0 0 var(--s-4); padding-left: 1.2em; }
li + li { margin-top: var(--s-2); }
strong { font-weight: 700; }

/* --- Accessibility helpers --------------------------------------------- */
:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 2px;
}
.skip-link {
  position: absolute; left: var(--s-4); top: -100px;
  background: var(--ember); color: var(--ink);
  padding: var(--s-3) var(--s-4); font-weight: 700; border-radius: var(--radius);
  z-index: 100; transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: var(--s-4); }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* --- Layout primitives -------------------------------------------------- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--s-5); }
.section { padding-block: var(--s-8); }
.section--tight { padding-block: var(--s-7); }
.prose { max-width: var(--maxw-prose); }
.prose p, .prose li { font-size: var(--fs-body); }

/* Alternating grounds */
.ground-dark  { background: var(--ink);   color: var(--text-on-ink); }
.ground-dark2 { background: var(--ink-2);  color: var(--text-on-ink); }
.ground-bone  { background: var(--bone);  color: var(--text-on-bone); }
.ground-bone .text-muted { color: var(--muted-on-bone); }
.ground-dark .text-muted, .ground-dark2 .text-muted { color: var(--muted-on-ink); }
.text-muted { color: var(--text-muted); }

/* --- Kicker (mono field-manual label) ---------------------------------- */
.kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-kicker);
  letter-spacing: var(--track-kicker);
  text-transform: uppercase;
  color: var(--ember);
  margin: 0 0 var(--s-3);
  display: flex; align-items: center; gap: var(--s-3);
}
.kicker::before {
  content: ""; width: 28px; height: 2px; background: var(--ember); display: inline-block; flex: none;
}
.ground-bone .kicker { color: var(--steel-2); }
.ground-bone .kicker::before { background: var(--steel-2); }

/* --- Buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-family: var(--font-sans); font-weight: 700; font-size: var(--fs-small);
  letter-spacing: 0.01em; line-height: 1;
  padding: 0.95em 1.5em; border-radius: var(--radius);
  border: 2px solid transparent; cursor: pointer; text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--ember); color: var(--ink); }
.btn--primary:hover { background: var(--ember-2); }
.btn--ghost { background: transparent; color: currentColor; border-color: currentColor; }
.btn--ghost:hover { border-color: var(--ember); color: var(--ember); }
.ground-bone .btn--ghost:hover { color: var(--ember-2); border-color: var(--ember-2); }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--s-4); align-items: center; }

/* Inline text link */
.link {
  color: var(--ember); text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--ember) 45%, transparent);
  transition: border-color var(--dur) var(--ease);
}
.ground-bone .link { color: var(--ember-2); border-bottom-color: color-mix(in srgb, var(--ember-2) 45%, transparent); }
.link:hover { border-bottom-color: currentColor; }

/* --- Header / nav ------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--ink) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: var(--hair) solid var(--ink-3);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: var(--s-5); min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: var(--s-3); text-decoration: none; color: var(--text-on-ink); font-weight: 800; }
.brand__mark { width: 26px; height: 26px; flex: none; }
.brand__name { font-size: 1rem; letter-spacing: 0.01em; }
.brand__name b { color: var(--ember); }
.nav__links { display: flex; align-items: center; gap: var(--s-6); list-style: none; margin: 0; padding: 0; }
.nav__links a {
  text-decoration: none; color: var(--text-on-ink); font-size: var(--fs-small); font-weight: 600;
  padding: var(--s-2) 0; border-bottom: 2px solid transparent; transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav__links a:hover { color: var(--ember); }
.nav__links a[aria-current="page"] { color: var(--ember); border-bottom-color: var(--ember); }
.nav__cta { margin-left: var(--s-2); }

.nav__toggle {
  display: none; background: none; border: 2px solid var(--ink-3); border-radius: var(--radius);
  color: var(--text-on-ink); padding: var(--s-2) var(--s-3); cursor: pointer; font-size: 1.2rem; line-height: 1;
}

@media (max-width: 860px) {
  .nav__toggle { display: inline-flex; }
  .nav__links {
    position: absolute; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--ink-2); border-bottom: var(--hair) solid var(--ink-3);
    padding: var(--s-3) var(--s-5) var(--s-5);
    max-height: 0; overflow: hidden; transition: max-height var(--dur) var(--ease);
  }
  .nav__links[data-open="true"] { max-height: 60vh; }
  .nav__links a { padding: var(--s-4) 0; border-bottom: var(--hair) solid var(--ink-3); }
  .nav__links a[aria-current="page"] { border-bottom-color: var(--ink-3); }
  .nav__cta { margin: var(--s-4) 0 0; }
}

/* --- Hero --------------------------------------------------------------- */
.hero { position: relative; padding-block: clamp(3.5rem, 2rem + 9vw, 8rem); overflow: hidden; }
.hero__grid {
  position: absolute; inset: 0; opacity: 0.5; pointer-events: none;
  background-image:
    linear-gradient(var(--ink-3) 1px, transparent 1px),
    linear-gradient(90deg, var(--ink-3) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 70% 20%, #000 30%, transparent 80%);
          mask-image: radial-gradient(ellipse 80% 70% at 70% 20%, #000 30%, transparent 80%);
}
.hero__inner { position: relative; max-width: 56rem; }
.hero h1 { margin-bottom: var(--s-5); }
.hero h1 .em { color: var(--ember); }
.hero__lead { font-size: var(--fs-lead); color: var(--muted-on-ink); max-width: 44rem; margin-bottom: var(--s-6); }

/* --- Sections / grids --------------------------------------------------- */
.section-head { max-width: 50rem; margin-bottom: var(--s-7); }
.section-head h2 { margin-bottom: var(--s-4); }
.grid { display: grid; gap: var(--s-5); }
@media (min-width: 700px) { .grid--2 { grid-template-columns: repeat(2, 1fr); } .grid--3 { grid-template-columns: repeat(3, 1fr); } }

/* --- Cards -------------------------------------------------------------- */
.card {
  border: var(--hair) solid var(--ink-3); border-radius: var(--radius-lg);
  padding: var(--s-6); background: var(--ink-2); height: 100%;
}
.ground-bone .card { background: var(--bone-2); border-color: color-mix(in srgb, var(--steel-2) 30%, transparent); box-shadow: var(--shadow); }
.card__index { font-family: var(--font-mono); font-size: var(--fs-kicker); letter-spacing: var(--track-kicker); color: var(--ember); margin-bottom: var(--s-3); }
.ground-bone .card__index { color: var(--ember-2); }
.card h3 { font-size: var(--fs-h3); margin-bottom: var(--s-3); }
.card p:last-child { margin-bottom: 0; }

/* --- 8-section template diagram ---------------------------------------- */
.template-grid { display: grid; gap: var(--s-3); grid-template-columns: 1fr; counter-reset: step; }
@media (min-width: 640px) { .template-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .template-grid { grid-template-columns: repeat(4, 1fr); } }
.tstep {
  position: relative; border: var(--hair) solid var(--ink-3); border-radius: var(--radius);
  background: var(--ink-2); padding: var(--s-5) var(--s-4) var(--s-4); counter-increment: step;
}
.ground-bone .tstep { background: var(--bone-2); border-color: color-mix(in srgb, var(--steel-2) 30%, transparent); }
.tstep::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono); font-size: var(--fs-kicker); letter-spacing: 0.1em;
  color: var(--ember); display: block; margin-bottom: var(--s-2);
}
.ground-bone .tstep::before { color: var(--ember-2); }
.tstep b { display: block; font-size: 1.02rem; }
.tstep span { display: block; font-size: var(--fs-small); color: var(--text-muted); margin-top: var(--s-1); }

/* --- Status badge (v0.2 placeholder markers) --------------------------- */
.badge {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.35em 0.7em; border-radius: 999px; border: 1px solid currentColor; color: var(--steel);
}
.badge--soon { color: var(--ember); }
.notice {
  border-left: 3px solid var(--ember); background: var(--ink-2);
  padding: var(--s-5); border-radius: 0 var(--radius) var(--radius) 0; color: var(--muted-on-ink);
}
.ground-bone .notice { background: var(--bone-2); color: var(--muted-on-bone); }

/* --- Stat / credibility row -------------------------------------------- */
.stats { display: grid; gap: var(--s-5); grid-template-columns: 1fr; }
@media (min-width: 700px) { .stats { grid-template-columns: repeat(3, 1fr); } }
.stat b { display: block; font-size: var(--fs-h2); color: var(--ember); line-height: 1; letter-spacing: var(--track-tight); }
.ground-bone .stat b { color: var(--ember-2); }
.stat span { font-size: var(--fs-small); color: var(--text-muted); }

/* --- CTA band ----------------------------------------------------------- */
.cta-band { background: var(--ink-2); border-top: var(--hair) solid var(--ink-3); border-bottom: var(--hair) solid var(--ink-3); }
.cta-band__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s-5); }
.cta-band h2 { margin: 0; max-width: 30ch; }

/* --- Forms (non-wired) -------------------------------------------------- */
.form { display: grid; gap: var(--s-5); max-width: 40rem; }
.field { display: grid; gap: var(--s-2); }
.field label { font-weight: 600; font-size: var(--fs-small); }
.field label .req { color: var(--signal); }
.field input, .field select, .field textarea {
  font: inherit; font-size: var(--fs-small); color: var(--text-on-bone);
  background: #fff; border: 2px solid color-mix(in srgb, var(--steel-2) 40%, transparent);
  border-radius: var(--radius); padding: 0.8em 0.9em; width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--ember-2); outline: none; }
.field textarea { min-height: 7rem; resize: vertical; }
.field-row { display: grid; gap: var(--s-5); }
@media (min-width: 640px) { .field-row { grid-template-columns: 1fr 1fr; } }

/* --- Footer ------------------------------------------------------------- */
.site-footer { background: var(--ink); border-top: var(--hair) solid var(--ink-3); color: var(--muted-on-ink); padding-block: var(--s-7); font-size: var(--fs-small); }
.footer-grid { display: grid; gap: var(--s-6); grid-template-columns: 1fr; }
@media (min-width: 760px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.site-footer h4 { font-size: var(--fs-kicker); font-family: var(--font-mono); letter-spacing: var(--track-kicker); text-transform: uppercase; color: var(--steel); margin-bottom: var(--s-4); }
.site-footer a { color: var(--muted-on-ink); text-decoration: none; }
.site-footer a:hover { color: var(--ember); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.footer-legal { margin-top: var(--s-7); padding-top: var(--s-5); border-top: var(--hair) solid var(--ink-3); display: flex; flex-wrap: wrap; gap: var(--s-4) var(--s-6); justify-content: space-between; font-size: 0.82rem; color: var(--steel); }

/* --- Misc --------------------------------------------------------------- */
.lede-divider { width: 48px; height: 3px; background: var(--ember); border: 0; margin: var(--s-6) 0; }
.eyebrow-list { list-style: none; padding: 0; }
.eyebrow-list li { padding-left: 1.6em; position: relative; }
.eyebrow-list li::before { content: "▸"; position: absolute; left: 0; color: var(--ember); }