/* Boli AI / Eduba prepared landing. Native to boliai.com minimal splash. */

:root {
  --bg: #FFFFFF;
  --surface: #F4F4F4;
  --ink: #0A0A0A;
  --ink-body: #1A1A1A;
  --ink-muted: #5A5A5A;
  --rule: #E6E6E6;
  --accent: #00FFDD;
  --accent-ink: #003832;
  --maxw: 960px;
  --gutter: 24px;
  --section-gap: 96px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink-body);
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";
}

a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 1px;
  transition: color 120ms ease, border-color 120ms ease, background 120ms ease;
}

a:hover, a:focus-visible {
  color: var(--accent-ink);
  border-bottom-color: var(--accent);
  background: var(--accent);
  outline: none;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 20px 0;
  background: var(--bg);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  border-bottom: 0;
  padding: 0;
}

.logo:hover { background: transparent; }

.logo img {
  height: 28px;
  width: auto;
  display: block;
}

.booth-tag {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  border: 0;
}

.booth-tag .dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

/* Hero */
.hero {
  padding: 96px 0 72px;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 24px;
  font-weight: 500;
}

h1.headline {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 700;
  font-size: clamp(32px, 5.4vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0 0 28px;
  max-width: 22ch;
}

h1.headline .mark {
  background: linear-gradient(to top, var(--accent) 38%, transparent 38%);
  padding: 0 2px;
}

.hero-sub {
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-body);
  max-width: 54ch;
  margin: 0 0 36px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 32px;
  font-size: 13px;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
  border-top: 1px solid var(--rule);
  padding-top: 20px;
  margin-top: 8px;
}

.hero-meta span strong {
  color: var(--ink);
  font-weight: 600;
  display: block;
  font-size: 14px;
  letter-spacing: 0;
}

/* Section scaffolding */
section {
  padding: 64px 0;
  border-top: 1px solid var(--rule);
}

.kicker {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 12px;
  font-weight: 500;
}

h2 {
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 20px;
  font-weight: 700;
  max-width: 28ch;
}

p { margin: 0 0 18px; }
p:last-child { margin-bottom: 0; }

.lede {
  font-size: 18px;
  line-height: 1.55;
  max-width: 62ch;
}

/* View / read */
.readout p {
  max-width: 64ch;
}

/* 60/30/10 split */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 32px 0 8px;
  border-top: 1px solid var(--rule);
}

.split .row {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}

.split .pct {
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1;
}

.split .row.ai .pct {
  color: var(--ink);
  position: relative;
}

.split .row.ai .pct::after {
  content: "";
  display: block;
  width: 28px;
  height: 4px;
  background: var(--accent);
  margin-top: 8px;
}

.split .label {
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 4px;
  font-size: 15px;
}

.split .desc {
  color: var(--ink-body);
  font-size: 15px;
  margin: 0;
  max-width: 58ch;
}

/* Engagement card */
.engagement {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 32px;
  margin-top: 8px;
}

.engagement h3 {
  margin: 0 0 16px;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.engagement ul {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: grid;
  gap: 10px;
}

.engagement li {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 12px;
  font-size: 15px;
  color: var(--ink-body);
}

.engagement li::before {
  content: "";
  display: block;
  width: 6px;
  height: 6px;
  background: var(--ink);
  border-radius: 50%;
  margin-top: 9px;
  margin-left: 4px;
}

.engagement .delivery {
  font-size: 13px;
  color: var(--ink-muted);
  border-top: 1px solid var(--rule);
  padding-top: 16px;
  margin: 0;
  letter-spacing: 0.02em;
}

/* Methodology note */
.paper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 12px;
}

.paper .citation {
  font-family: 'JetBrains Mono', 'Menlo', monospace;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-muted);
  padding: 14px 16px;
  border-left: 2px solid var(--accent);
  background: var(--surface);
}

/* Partnership line */
.partnership {
  font-size: 15px;
  color: var(--ink-body);
  max-width: 62ch;
}

/* CTA */
.cta {
  padding: 72px 0 64px;
}

.cta-card {
  padding: 40px 32px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--bg);
}

.cta-card h2 {
  margin-bottom: 14px;
  max-width: none;
}

.cta-card .cta-sub {
  font-size: 16px;
  color: var(--ink-body);
  max-width: 56ch;
  margin: 0 0 28px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 20px;
  align-items: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: #FFFFFF;
  border: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 14px 22px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0;
  border-radius: 6px;
  min-height: 48px;
  transition: background 140ms ease, color 140ms ease, transform 140ms ease;
}

.button:hover, .button:focus-visible {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

.button .arrow {
  display: inline-block;
  margin-left: 10px;
  transition: transform 160ms ease;
}

.button:hover .arrow { transform: translateX(3px); }

.contact-inline {
  font-size: 14px;
  color: var(--ink-muted);
}

.contact-inline strong {
  color: var(--ink);
  font-weight: 600;
}

.contact-inline a { font-weight: 500; }

/* Credentials strip */
.credentials {
  padding: 48px 0 64px;
  border-top: 1px solid var(--rule);
}

.cred-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.cred-grid li {
  font-size: 14px;
  color: var(--ink-body);
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 14px;
  align-items: baseline;
}

.cred-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.cred-grid .tick {
  color: var(--ink);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.1em;
}

/* Footer */
footer {
  border-top: 1px solid var(--rule);
  padding: 32px 0 48px;
  font-size: 13px;
  color: var(--ink-muted);
}

footer .wrap {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

footer a {
  color: var(--ink-muted);
  border-bottom-color: var(--rule);
}

footer .prepared { letter-spacing: 0.02em; }

/* Responsive */
@media (min-width: 720px) {
  .split { grid-template-columns: 1fr; }
  .split .row { grid-template-columns: 96px 1fr; gap: 28px; }
  .split .pct { font-size: 36px; }
  .cred-grid { grid-template-columns: 1fr 1fr; column-gap: 40px; }
  .cred-grid li { border-bottom: 1px solid var(--rule); }
  .cta-card { padding: 48px 44px; }
  .paper { grid-template-columns: 1.2fr 1fr; align-items: start; }
}

@media (min-width: 960px) {
  .hero { padding: 120px 0 88px; }
  section { padding: 80px 0; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* Print */
@media print {
  .site-header, footer { border-color: #ccc; }
  .button { background: transparent; color: var(--ink); }
  a { color: var(--ink); }
}