@font-face {
  font-family: 'Archivo Black';
  src: url('fonts/ArchivoBlack-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('fonts/IBMPlexMono-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('fonts/IBMPlexMono-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #ffffff;
  --ink: #000000;
  --accent-yellow: #ffe600;
  --grey: #e5e5e5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.5;
}

h1, h2 {
  font-family: 'Archivo Black', sans-serif;
  text-transform: uppercase;
  line-height: 0.95;
  margin: 0 0 1.25rem;
}
h1 { font-size: clamp(2.75rem, 7vw, 5.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.1rem; font-weight: 700; margin: 0 0 0.5rem; }

p { max-width: 60ch; }

a { color: var(--ink); text-decoration: underline; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

.section { padding: 5rem 0; border-top: 4px solid var(--ink); }
.section:first-of-type { border-top: none; }
.section.alt { background: var(--grey); }
@media (max-width: 640px) { .section { padding: 3rem 0; } }

.tag {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  background: var(--accent-yellow);
  color: var(--ink);
  padding: 0.25rem 0.5rem;
  margin-bottom: 1rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 4px solid var(--ink);
}
.header-inner { display: flex; justify-content: space-between; align-items: center; padding: 1.25rem 2rem; }
.logo { font-family: 'Archivo Black', sans-serif; font-size: 1.25rem; text-decoration: none; }
.main-nav { display: flex; gap: 1.75rem; align-items: center; }
.main-nav a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  text-decoration: underline;
  color: var(--ink);
}
.nav-cta {
  background: var(--ink);
  color: var(--bg) !important;
  padding: 0.5rem 0.85rem;
  text-decoration: none !important;
  border: 3px solid var(--ink);
}
.nav-cta:hover { background: var(--accent-yellow); color: var(--ink) !important; }
@media (max-width: 700px) { .main-nav a:not(.nav-cta) { display: none; } }

/* Hero */
.hero-sub { font-size: 1.15rem; max-width: 44rem; }
.hero-actions { display: flex; gap: 1rem; margin-top: 2rem; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding: 0.9rem 1.5rem;
  border: 3px solid var(--ink);
  text-decoration: none;
  transition: none;
}
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover, .btn-primary:focus-visible { background: var(--accent-yellow); color: var(--ink); }
.btn-secondary { background: var(--bg); color: var(--ink); }
.btn-secondary:hover, .btn-secondary:focus-visible { background: var(--ink); color: var(--bg); }
.btn-large { font-size: 1rem; padding: 1.1rem 2rem; }

/* Grids */
.needs-grid, .process-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; margin-top: 2rem; }
.process-grid { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 760px) { .needs-grid, .process-grid { grid-template-columns: 1fr; } }

.box { border: 3px solid var(--ink); padding: 1.5rem; background: var(--bg); }
.needs-grid .box:nth-child(1) { border-right: none; border-bottom: none; }
.needs-grid .box:nth-child(2) { border-bottom: none; }
@media (max-width: 760px) {
  .needs-grid .box, .needs-grid .box:nth-child(1), .needs-grid .box:nth-child(2) {
    border: 3px solid var(--ink);
    margin-bottom: -3px;
  }
}

/* Services table */
.services-table { margin-top: 2rem; }
.service-row { border: 3px solid var(--ink); padding: 2rem; margin-bottom: -3px; background: var(--bg); }
.value { font-weight: 700; }

/* Discovery */
.discovery-lead { font-size: 1.15rem; max-width: 48rem; margin-bottom: 2rem; }

/* Evidence */
.evidence-note { max-width: 48rem; background: var(--accent-yellow); padding: 0.1rem 0.5rem; display: inline; box-decoration-break: clone; -webkit-box-decoration-break: clone; }

/* Final CTA */
.cta-final p { font-size: 1.1rem; margin-bottom: 2rem; }

/* Books */
.book-feature {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: start;
  margin-top: 2rem;
  border: 3px solid var(--ink);
  padding: 2rem;
  background: var(--bg);
}
.book-feature img { display: block; border: 3px solid var(--ink); }
.book-strapline { font-weight: 700; }
.book-meta { font-family: 'IBM Plex Mono', monospace; font-size: 0.8rem; margin-bottom: 1.5rem; }
@media (max-width: 760px) { .book-feature { grid-template-columns: 1fr; padding: 1.5rem; } }

/* Footer */
.site-footer { padding: 2rem 0; border-top: 4px solid var(--ink); }
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
}
.footer-legal {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 3px solid var(--ink);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
}
.footer-legal p { margin: 0 0 0.25rem; }
.footer-legal address { font-style: normal; }

a:focus-visible, .btn:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}