/* Learning Intelligence site layout.
   Every colour and font comes from brand/li.css (li_visual_assets --web).
   No hex, rgb or font name is typed here - build.py refuses one.
   Tints are derived from tokens with color-mix, never retyped. */

:root {
  --max-w: 1160px;
  --radius: 12px;
  --nav-h: 64px;
  --hair: color-mix(in srgb, var(--li-white) 7%, transparent);
  --line: color-mix(in srgb, var(--li-white) 12%, transparent);
  --muted: color-mix(in srgb, var(--li-white) 55%, transparent);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--li-ink);
  color: var(--li-white);
  font-family: var(--li-font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--li-accent); outline-offset: 3px; border-radius: 4px; }
section[id] { scroll-margin-top: 80px; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 40px; }

/* ---------- type ---------- */
.eyebrow {
  font-family: var(--li-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--li-accent);
  margin: 0 0 14px;
}
.section-title {
  font-size: clamp(26px, 2.8vw, 36px);
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.15;
  margin: 0 0 12px;
}
.section-sub { color: var(--li-sublabel); font-size: 17px; max-width: 620px; margin: 0; }
.section-head { text-align: center; margin: 0 auto 48px; }
.section-head .section-sub { margin: 0 auto; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 13px 28px; border-radius: 8px;
  font-family: var(--li-font); font-size: 14px; font-weight: 700;
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--li-accent); color: var(--li-card); }
.btn-primary:hover { background: var(--li-amber-bright); }
.btn-secondary { background: transparent; color: var(--li-white); border-color: color-mix(in srgb, var(--li-white) 32%, transparent); }
.btn-secondary:hover { border-color: var(--li-white); }
.btn svg { width: 18px; height: 18px; flex: none; }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50; height: var(--nav-h);
  background: var(--li-ink-deep); border-bottom: 1px solid var(--hair);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 40px; height: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav-logo img { height: 34px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; margin: 0; padding: 0; }
.nav-links a { font-size: 13px; font-weight: 500; color: color-mix(in srgb, var(--li-white) 60%, transparent); text-decoration: none; }
.nav-links a:hover { color: var(--li-white); }
.nav-links .nav-cta {
  background: var(--li-accent); color: var(--li-card); font-weight: 700;
  padding: 8px 18px; border-radius: 999px;
}
.nav-links .nav-cta:hover { background: var(--li-amber-bright); color: var(--li-card); }

/* ---------- hero ---------- */
.hero { padding: 140px 0 100px; background: var(--li-gradient); border-bottom: 1px solid var(--hair); }
.hero-inner { max-width: 680px; margin: 0 auto; text-align: center; }
.hero .eyebrow { display: inline-flex; align-items: center; gap: 14px; letter-spacing: 0.3em; }
.hero .eyebrow::before, .hero .eyebrow::after { content: ""; width: 28px; height: 1px; background: var(--li-accent); opacity: .6; }
.hero h1 {
  font-size: clamp(40px, 5vw, 64px); font-weight: 800; letter-spacing: -2px; line-height: 1.05;
  margin: 0 0 22px;
}
.hero h1 em { font-style: normal; color: var(--li-accent); }
.hero-lede { font-size: 17px; color: var(--li-sublabel); margin: 0 auto 36px; max-width: 560px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- pillar strip ---------- */
.pillars { padding: 48px 0; background: var(--li-card); border-bottom: 1px solid var(--hair); }
.pillar-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; list-style: none; margin: 0; padding: 0; }
.pillar {
  display: flex; flex-direction: column; align-items: center; text-align: center; gap: 12px;
  padding: 22px 16px; border-radius: var(--radius); border: 1px solid var(--li-divider);
  background: var(--li-ink);
}
.pillar img { width: 44px; height: 44px; }
.pillar span { font-size: 15px; font-weight: 600; line-height: 1.35; }

/* ---------- bands ---------- */
.band { padding: 96px 0; border-bottom: 1px solid var(--hair); }
.band--raised { background: var(--li-card); }

/* ---------- video ---------- */
.pv-wrap { max-width: 960px; margin: 0 auto; text-align: center; }
.pv-frame {
  border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line);
  background: var(--li-ink-deep); aspect-ratio: 16 / 9;
}
.pv-frame video { width: 100%; height: 100%; display: block; }
.pv-pending { display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; }
.pv-pending span { font-family: var(--li-font-mono); font-size: 12px; letter-spacing: 2px; color: var(--muted); }
.pv-cta { display: flex; justify-content: center; margin-top: 28px; }

/* ---------- cards ---------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card-grid--2 { grid-template-columns: repeat(2, 1fr); }
.card {
  position: relative; background: var(--li-card); border: 1px solid var(--li-divider);
  border-radius: var(--radius); padding: 28px;
}
.band--raised .card { background: var(--li-ink); }
.card--rule::before {
  content: ""; display: block; width: 32px; height: 3px; border-radius: 2px;
  background: var(--li-accent); margin-bottom: 18px;
}
.card h3 { font-size: 18px; font-weight: 700; margin: 0 0 8px; line-height: 1.3; }
.card p { margin: 0; color: var(--li-sublabel); font-size: 15px; }
.card .micro {
  font-family: var(--li-font-mono); font-size: 10px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--muted); margin-bottom: 10px;
}
.option { display: flex; flex-direction: column; padding: 32px; }
.option h3 { font-size: 20px; }
.option p { flex: 1; margin-bottom: 24px; }
.option .btn { align-self: flex-start; }
.audience-note { text-align: center; color: var(--li-sublabel); margin: 28px auto 0; max-width: 620px; }

/* ---------- pipeline ---------- */
.pipeline {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border: 1px solid var(--li-divider); border-radius: var(--radius); overflow: hidden;
  list-style: none; margin: 0; padding: 0;
}
.step { padding: 28px 24px; border-right: 1px solid var(--li-divider); background: var(--li-card); }
.step:last-child { border-right: 0; }
.step-num { font-family: var(--li-font-mono); font-size: 11px; letter-spacing: 2px; color: var(--li-accent); }
.step-icon {
  width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--li-divider);
  display: flex; align-items: center; justify-content: center; margin: 14px 0 16px;
}
.step-icon img { width: 24px; height: 24px; }
.step h3 { font-size: 17px; font-weight: 700; margin: 0 0 6px; }
.step p { margin: 0; font-size: 14.5px; color: var(--li-sublabel); }

/* ---------- form ---------- */
.form-card {
  max-width: 560px; margin: 0 auto; background: var(--li-card);
  border: 1px solid var(--li-divider); border-radius: var(--radius); padding: 40px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.field label, .field .label {
  font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  color: var(--li-sublabel);
}
.field .opt { font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--muted); }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; font-size: 15px; color: var(--li-white);
  background: var(--li-ink-deep); border: 1px solid var(--line); border-radius: 8px;
  padding: 11px 14px;
}
.field textarea { min-height: 110px; resize: vertical; }
.field select { appearance: none; background-image: none; }
.field input::placeholder, .field textarea::placeholder { color: var(--muted); opacity: 1; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--li-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--li-accent) 30%, transparent);
}
.consent { display: flex; gap: 12px; align-items: flex-start; font-size: 14px; color: var(--li-sublabel); margin: 6px 0 24px; }
.consent input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--li-accent); flex: none; }
.form-card .btn { width: 100%; padding: 15px 28px; font-size: 15px; }
.hp { display: none; }
.form-alt { text-align: center; color: var(--li-sublabel); font-size: 14px; margin: 22px 0 0; }
.form-alt a { color: var(--li-accent); }

/* ---------- footer ---------- */
.footer { background: var(--li-ink-deep); padding: 52px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.footer-brand img { height: 30px; width: auto; margin-bottom: 14px; }
.footer-brand p { color: var(--muted); font-size: 14px; margin: 0; max-width: 300px; }
.footer h4 {
  font-family: var(--li-font-mono); font-size: 10px; font-weight: 500; letter-spacing: 2px;
  text-transform: uppercase; color: var(--muted); margin: 0 0 14px;
}
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer ul a { color: var(--li-sublabel); text-decoration: none; font-size: 14px; }
.footer ul a:hover { color: var(--li-white); }
.footer-legal {
  border-top: 1px solid var(--hair); margin-top: 40px; padding-top: 22px;
  font-size: 12.5px; color: var(--muted); line-height: 1.8;
}
.footer-legal p { margin: 0; }

/* ---------- legal pages ---------- */
.page { padding: 120px 0 80px; }
.page-inner { max-width: 680px; margin: 0 auto; }
.page h1 { font-size: clamp(32px, 4vw, 44px); font-weight: 800; letter-spacing: -1px; margin: 0 0 8px; }
.page h2 { font-size: 20px; font-weight: 700; margin: 36px 0 10px; }
.page p, .page li { color: var(--li-sublabel); }
.page a { color: var(--li-accent); }
.draft-note {
  border-left: 3px solid var(--li-accent); padding: 10px 16px; margin: 20px 0 8px;
  background: var(--li-card); border-radius: 0 8px 8px 0; font-size: 14px;
}

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .pillar-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: 1fr; }
  .card-grid--2 { grid-template-columns: repeat(2, 1fr); }
  .pipeline { grid-template-columns: 1fr 1fr; }
  .step:nth-child(2n) { border-right: 0; }
  .step:nth-child(-n+2) { border-bottom: 1px solid var(--li-divider); }
}
@media (max-width: 768px) {
  .container, .nav-inner { padding: 0 20px; }
  .nav-links li:not(:last-child) { display: none; }
  .nav-logo img { height: 28px; }
  .hero { padding: 116px 0 72px; }
  .band { padding: 72px 0; }
  .card-grid--2 { grid-template-columns: 1fr; }
  .pipeline { grid-template-columns: 1fr; }
  .step { border-right: 0; border-bottom: 1px solid var(--li-divider); }
  .step:last-child { border-bottom: 0; }
  .pv-cta .btn, .hero-actions .btn { width: 100%; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form-card { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}