/* ─────────────────────────────────────────────
   autofonix.css
   Centerpointe Research Institute — Autofonix™
───────────────────────────────────────────── */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { line-height: 1.7; -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ol, ul { list-style: none; }
[hidden] { display: none !important; }

/* ── Design Tokens ── */
:root {
  /* Colors — solid only, no rgba for text */
  --color-ink:        #1a1a18;
  --color-ink-muted:  #6b6b66;
  --color-ink-faint:  #9e9e98;
  --color-bg:         #faf9f6;
  --color-surface:    #f1efe8;
  --color-border:     #e0ddd4;
  --color-border-mid: #c8c5bc;

  /* Font families */
  --font-serif: 'Fraunces', Georgia, serif;
  --font-sans:  'DM Sans', system-ui, sans-serif;

  /* 5-size font scale — minimum 18px */
  --fs-1: 1.125rem;                    /* 18px — labels, captions, footnotes, small UI */
  --fs-2: 1.25rem;                     /* 20px — body copy */
  --fs-3: 1.5rem;                      /* 24px — step titles, testimonials, pullquotes */
  --fs-4: 2rem;                        /* 32px — h2, step numbers */
  --fs-5: clamp(2.75rem, 6vw, 4rem);   /* 44–64px — h1 only */

  /* Layout */
  --container-max: 1100px;
  --text-max:      780px;   /* prose column — keeps long-form readable at 1100px container */
  --section-pad:   5rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* ── Base ── */
body {
  font-family: var(--font-sans);
  font-size: var(--fs-2);
  color: var(--color-ink);
  background-color: var(--color-bg);
}

/* ── Accessibility ── */
.af-skip-link {
  position: absolute;
  top: -100%; left: 1rem;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-1);
  font-weight: 400;
  z-index: 100;
  transition: top 0.15s ease;
}
.af-skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ── Layout ── */
.af-container {
  max-width: var(--container-max);
  margin-inline: auto;
}

.af-section {
  padding: var(--section-pad) 20px;
  border-bottom: 1px solid var(--color-border);
}

/* ── Hero ── */
.af-hero {
  padding: 6rem 20px 5rem;
  border-bottom: 1px solid var(--color-border);
}

.af-hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.af-hero-visual { width: 100%; }
.af-hero-visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* ── Typography ── */
.af-eyebrow,
.af-section-label {
  font-family: var(--font-sans);
  font-size: var(--fs-1);
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-bottom: 1rem;
}

.af-h1 {
  font-family: var(--font-serif);
  font-size: var(--fs-5);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
  color: var(--color-ink);
  max-width: 820px;
}

.af-h2 {
  font-family: var(--font-serif);
  font-size: var(--fs-4);
  font-weight: 300;
  line-height: 1.12;
  margin-bottom: 1.25rem;
  color: var(--color-ink);
}

.af-h1 em, .af-h2 em { font-style: italic; }

.af-subhead {
  font-size: var(--fs-2);
  font-weight: 300;
  color: var(--color-ink-muted);
  max-width: 480px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.af-body {
  font-size: var(--fs-2);
  font-weight: 300;
  color: var(--color-ink-muted);
  line-height: 1.85;
  margin-bottom: 1.25rem;
  max-width: var(--text-max);
}
.af-body:last-child { margin-bottom: 0; }
.af-body em { font-style: italic; color: var(--color-ink); }

.af-pullquote {
  font-family: var(--font-serif);
  font-size: var(--fs-3);
  font-style: italic;
  font-weight: 300;
  line-height: 1.45;
  color: var(--color-ink);
  border-left: 2px solid var(--color-border-mid);
  padding-left: 1.5rem;
  margin: 2.5rem 0;
  max-width: var(--text-max);
}

.af-divider {
  width: 40px; height: 1px;
  background: var(--color-border-mid);
  margin: 2rem 0;
}

/* ── CTA Button ── */
.af-cta-primary {
  display: inline-block;
  background: var(--color-ink);
  color: var(--color-bg);
  font-family: var(--font-sans);
  font-size: var(--fs-1);
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 1rem 2.5rem;
  border-radius: 2px;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s ease;
}
.af-cta-primary:hover { opacity: 0.78; }

.af-cta-center {
  text-align: center;
  margin: 2.5rem 0 1.5rem;
}

/* ── Opt-in Form (Keap placeholder) ── */
.af-optin {
  margin-top: 2rem;
  width: 100%;
  max-width: 480px;
}

.af-optin-label {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--fs-1);
  font-weight: 400;
  color: var(--color-ink-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  text-align: left;
}

.af-optin-row {
  display: flex;
  gap: 8px;
}

.af-optin-row input[type="email"] {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--color-border-mid);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: var(--fs-1);
  color: var(--color-ink);
  background: var(--color-bg);
  outline: none;
}
.af-optin-row input[type="email"]::placeholder { color: var(--color-ink-faint); }
.af-optin-row input[type="email"]:focus { border-color: var(--color-ink); }

.af-optin-note {
  font-size: var(--fs-1);
  color: var(--color-ink-faint);
  margin-top: 0.625rem;
  margin-bottom: 0;
  text-align: left;
}

/* ── Frequency Visualizer ── */
.af-freq-wrap { margin: 2.5rem 0 0; }

.af-freq-visual {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 64px;
  margin-bottom: 0.5rem;
  max-width: var(--text-max);
}

.af-bar { flex: 1; background: var(--color-border); border-radius: 1px; }
.af-bar--active { background: var(--color-ink); }

.af-freq-label {
  font-size: var(--fs-1);
  color: var(--color-ink-faint);
  letter-spacing: 0.04em;
  margin-bottom: 2rem;
  max-width: var(--text-max);
}

/* ── Steps ── */
.af-steps { margin: 2.5rem 0; max-width: var(--text-max); }

.af-step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 0 1.5rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--color-border);
  align-items: start;
}
.af-step:last-child { border-bottom: 1px solid var(--color-border); }

.af-step-num {
  font-family: var(--font-serif);
  font-size: var(--fs-4);
  font-weight: 300;
  color: var(--color-ink-faint);
  line-height: 1;
  padding-top: 4px;
}

.af-step-title {
  font-size: var(--fs-3);
  font-weight: 400;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
}

.af-step-body {
  font-size: var(--fs-2);
  font-weight: 300;
  color: var(--color-ink-muted);
  line-height: 1.75;
  margin-bottom: 0;
}

/* ── Benefit Grid ── */
.af-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 2.5rem 0;
}

.af-cell { background: var(--color-bg); padding: 1.75rem 1.5rem; }

.af-cell-icon {
  font-size: var(--fs-1);
  color: var(--color-ink-faint);
  margin-bottom: 0.75rem;
  display: block;
}

.af-cell-title {
  font-size: var(--fs-2);
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
}

.af-cell-body {
  font-size: var(--fs-1);
  font-weight: 300;
  color: var(--color-ink-muted);
  line-height: 1.75;
  margin-bottom: 0;
}

/* ── Contrast Table ── */
.af-contrast {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 2.5rem 0;
  max-width: var(--text-max);
}

.af-contrast-head {
  background: var(--color-surface);
  padding: 0.875rem 1.5rem;
  font-size: var(--fs-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  font-weight: 400;
}

.af-contrast-list { background: var(--color-bg); padding: 0.5rem 0; }

.af-contrast-list li {
  font-size: var(--fs-1);
  font-weight: 300;
  color: var(--color-ink-muted);
  padding: 0.625rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.6;
}
.af-contrast-list li:last-child { border-bottom: none; }

.af-contrast-col--strong .af-contrast-list li {
  color: var(--color-ink);
  font-weight: 400;
}

/* ── Timeline ── */
.af-timeline { margin: 2.5rem 0; max-width: var(--text-max); }

.af-tl-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 0 1.5rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--color-border);
  align-items: start;
}
.af-tl-item:last-child { border-bottom: 1px solid var(--color-border); }

.af-tl-when {
  font-family: var(--font-serif);
  font-size: var(--fs-2);
  font-style: italic;
  font-weight: 300;
  color: var(--color-ink-muted);
  padding-top: 3px;
  line-height: 1.4;
}

.af-tl-title {
  font-size: var(--fs-3);
  font-weight: 400;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
}

.af-tl-body {
  font-size: var(--fs-2);
  font-weight: 300;
  color: var(--color-ink-muted);
  line-height: 1.75;
  margin-bottom: 0;
}

/* ── Testimonials ── */
.af-testimonials {
  display: grid;
  gap: 1.25rem;
  margin: 2rem 0;
  max-width: var(--text-max);
}

.af-testimonial {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.af-testimonial-text {
  font-family: var(--font-serif);
  font-size: var(--fs-3);
  font-style: italic;
  font-weight: 300;
  line-height: 1.55;
  color: var(--color-ink);
  margin-bottom: 1rem;
}

.af-testimonial-attr {
  display: block;
  font-style: normal;
  font-size: var(--fs-1);
  color: var(--color-ink-muted);
  font-weight: 400;
  letter-spacing: 0.04em;
}

/* ── Titles List ── */
.af-tracks {
  margin: 2rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: var(--text-max);
}

.af-track {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.15s ease;
}
.af-track:last-child { border-bottom: none; }
.af-track:hover { background: var(--color-surface); cursor: pointer; }

.af-track-name {
  font-size: var(--fs-2);
  font-weight: 400;
  color: var(--color-ink);
  margin-bottom: 0.25rem;
}

.af-track-desc {
  font-size: var(--fs-1);
  font-weight: 300;
  color: var(--color-ink-muted);
  margin-bottom: 0;
}

/* ── Footnote ── */
.af-footnote {
  font-size: var(--fs-1);
  color: var(--color-ink-faint);
  font-weight: 300;
  line-height: 1.7;
  margin-top: 1.5rem;
  max-width: var(--text-max);
}

/* ── Footer ── */
.af-footer {
  padding: 3rem 20px;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.af-footer .af-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.af-footer-copy {
  font-size: var(--fs-1);
  color: var(--color-ink-muted);
  font-weight: 300;
  margin-bottom: 0;
}

.af-footer-nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}
.af-footer-nav a {
  font-size: var(--fs-1);
  color: var(--color-ink-muted);
  font-weight: 300;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.af-footer-nav a:hover { color: var(--color-ink); }

/* ── Responsive: 900px ── */
@media (max-width: 900px) {
  .af-hero-grid { grid-template-columns: 1fr; }
  .af-hero-visual { order: 2; max-width: 420px; margin-inline: auto; }

  .af-grid-2    { grid-template-columns: 1fr; }
  .af-contrast  { grid-template-columns: 1fr; }

  .af-tl-item {
    grid-template-columns: 1fr;
    gap: 0.5rem 0;
  }
}

/* ── Responsive: 500px ── */
@media (max-width: 500px) {
  :root { --section-pad: 3.5rem; }

  .af-hero { padding-top: 4rem; padding-bottom: 3.5rem; }

  .af-step {
    grid-template-columns: 1fr;
    gap: 0.5rem 0;
  }
  .af-step-num { margin-bottom: 0.5rem; }

  .af-optin-row {
    flex-direction: column;
  }
  .af-optin-row input[type="email"],
  .af-cta-primary { width: 100%; text-align: center; }
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .af-cta-primary, .af-track, .af-skip-link { transition: none; }
}