/* Avatar Buddy x Eduba landing page
   Brand tokens pulled from brand-pack.json
   No external fonts loaded (Museo Sans is paid; system stack mirrors the live site)
*/

:root {
  --ab-teal: #09A29E;
  --ab-teal-deep: #0B7F7B;
  --ab-teal-ink: #064A48;
  --ab-purple: #A900ED;
  --ab-purple-deep: #8600ED;
  --ab-accent: #D058CF;
  --ab-ink: #110C1D;
  --ab-body: #1A1230;
  --ab-mist: #F5F3F8;
  --ab-line: #E7E2EF;
  --ab-cream: #FAF9FC;
  --ab-white: #FFFFFF;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;

  --shadow-subtle: 0 1px 2px rgba(17, 12, 29, 0.06), 0 1px 3px rgba(17, 12, 29, 0.08);
  --shadow-medium: 0 8px 24px rgba(17, 12, 29, 0.10);
  --shadow-ring: 0 0 0 1px rgba(17, 12, 29, 0.06);

  --unit: 8px;
  --section-gap: 96px;

  --font-body: "Museo Sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-heading: "Museo Sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ab-body);
  background: var(--ab-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--ab-teal-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 180ms ease;
}

a:hover {
  color: var(--ab-teal);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--ab-ink);
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: 0;
}

p {
  margin: 0 0 16px;
}

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

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(169, 0, 237, 0.25), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(208, 88, 207, 0.18), transparent 60%),
    linear-gradient(180deg, #0d2b2b 0%, #072220 60%, #051d1b 100%);
  color: var(--ab-white);
  padding: 32px 0 88px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.35), transparent 70%);
  pointer-events: none;
}

.hero__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 56px;
  position: relative;
  z-index: 1;
}

.hero__logo img {
  height: 44px;
  width: auto;
  display: block;
}

.hero__meta {
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 500;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ab-teal);
  background: rgba(9, 162, 158, 0.12);
  border: 1px solid rgba(9, 162, 158, 0.35);
  padding: 8px 14px;
  border-radius: 999px;
  position: relative;
  z-index: 1;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--ab-teal);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(9, 162, 158, 0.18);
}

.hero h1 {
  margin-top: 24px;
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  color: var(--ab-white);
  max-width: 22ch;
  position: relative;
  z-index: 1;
}

.hero h1 .highlight {
  background: linear-gradient(90deg, #2de0dc, #A900ED 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__sub {
  margin-top: 24px;
  font-size: 18px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.82);
  max-width: 60ch;
  position: relative;
  z-index: 1;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 48px;
  position: relative;
  z-index: 1;
}

.stat {
  padding: 20px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  backdrop-filter: blur(4px);
}

.stat__value {
  font-size: 26px;
  font-weight: 700;
  color: var(--ab-white);
  font-feature-settings: "tnum" 1, "lnum" 1;
}

.stat__label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.68);
  margin-top: 4px;
  line-height: 1.4;
}

/* ---------- Section chrome ---------- */

section {
  padding: 88px 0;
}

section + section {
  border-top: 1px solid var(--ab-line);
}

.section-head {
  max-width: 62ch;
  margin-bottom: 40px;
}

.section-kicker {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ab-teal-deep);
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
}

.section-head p {
  margin-top: 14px;
  color: var(--ab-body);
  font-size: 17px;
}

/* ---------- Opening block ---------- */

.opening {
  background: var(--ab-white);
}

.opening__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: start;
}

.opening__body p {
  font-size: 18px;
  color: var(--ab-body);
}

.opening__pull {
  padding: 28px 28px;
  background: var(--ab-cream);
  border: 1px solid var(--ab-line);
  border-left: 3px solid var(--ab-teal);
  border-radius: var(--radius-md);
  color: var(--ab-ink);
}

.opening__pull strong {
  color: var(--ab-ink);
  font-weight: 700;
}

.opening__pull cite {
  display: block;
  font-style: normal;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ab-teal-deep);
  margin-top: 14px;
  text-transform: uppercase;
  font-weight: 600;
}

/* ---------- Framework / 60-30-10 ---------- */

.framework {
  background: var(--ab-cream);
}

.framework__body {
  max-width: 70ch;
  color: var(--ab-body);
  font-size: 17px;
  margin-bottom: 32px;
}

.split {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 8px;
}

.split__cell {
  background: var(--ab-white);
  border: 1px solid var(--ab-line);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  box-shadow: var(--shadow-subtle);
}

.split__bar {
  height: 6px;
  border-radius: 999px;
  background: var(--ab-line);
  margin-bottom: 18px;
  overflow: hidden;
}

.split__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.split__cell[data-layer="60"] .split__fill {
  width: 60%;
  background: var(--ab-teal);
}

.split__cell[data-layer="30"] .split__fill {
  width: 30%;
  background: var(--ab-purple);
}

.split__cell[data-layer="10"] .split__fill {
  width: 10%;
  background: var(--ab-accent);
}

.split__num {
  font-size: 28px;
  font-weight: 700;
  color: var(--ab-ink);
  font-feature-settings: "tnum" 1, "lnum" 1;
}

.split__label {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ab-teal-deep);
  font-weight: 600;
  margin: 4px 0 10px;
}

.split__copy {
  font-size: 15px;
  color: var(--ab-body);
  line-height: 1.55;
}

.partner-note {
  margin-top: 28px;
  padding: 20px 24px;
  background: var(--ab-white);
  border: 1px solid var(--ab-line);
  border-radius: var(--radius-md);
  color: var(--ab-body);
  font-size: 15px;
}

.partner-note strong {
  color: var(--ab-ink);
}

/* ---------- Case + paper ---------- */

.evidence {
  background: var(--ab-white);
}

.evidence__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.card {
  background: var(--ab-white);
  border: 1px solid var(--ab-line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card__tag {
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 6px 10px;
  border-radius: 6px;
  background: rgba(9, 162, 158, 0.10);
  color: var(--ab-teal-deep);
}

.card__tag--paper {
  background: rgba(169, 0, 237, 0.10);
  color: var(--ab-purple-deep);
}

.card h3 {
  font-size: 22px;
  font-weight: 700;
}

.card p {
  font-size: 15.5px;
  color: var(--ab-body);
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
  padding-top: 14px;
  border-top: 1px dashed var(--ab-line);
  font-size: 13px;
  color: var(--ab-body);
}

.card__meta span strong {
  display: block;
  color: var(--ab-ink);
  font-size: 14px;
  margin-bottom: 2px;
  font-weight: 600;
}

.card__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
}

.card__links a {
  word-break: break-all;
}

/* ---------- Credibility strip ---------- */

.credibility {
  background: var(--ab-ink);
  color: rgba(255, 255, 255, 0.85);
}

.credibility .container {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: center;
}

.credibility__badge {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ab-teal);
  border: 1px solid rgba(9, 162, 158, 0.4);
  padding: 10px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

.credibility p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
}

.credibility p strong {
  color: var(--ab-white);
  font-weight: 600;
}

/* ---------- CTA ---------- */

.cta {
  background:
    radial-gradient(700px 300px at 85% 0%, rgba(169, 0, 237, 0.12), transparent 60%),
    radial-gradient(600px 300px at 10% 100%, rgba(9, 162, 158, 0.16), transparent 60%),
    var(--ab-cream);
  border-top: 1px solid var(--ab-line);
}

.cta__wrap {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: center;
}

.cta h2 {
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  max-width: 20ch;
}

.cta p {
  margin-top: 14px;
  font-size: 17px;
  color: var(--ab-body);
  max-width: 52ch;
}

.cta__host {
  background: var(--ab-white);
  border: 1px solid var(--ab-line);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-medium);
}

.host-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.host-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ab-teal), var(--ab-purple));
  color: var(--ab-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.04em;
  box-shadow: var(--shadow-subtle);
}

.host-row__name {
  font-weight: 700;
  color: var(--ab-ink);
  font-size: 16px;
}

.host-row__title {
  font-size: 13px;
  color: var(--ab-body);
  margin-top: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  background: var(--ab-teal);
  color: var(--ab-white);
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
  padding: 16px 22px;
  border-radius: var(--radius-md);
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
  box-shadow: 0 6px 16px rgba(9, 162, 158, 0.28);
  letter-spacing: 0.01em;
}

.btn:hover {
  background: var(--ab-teal-deep);
  color: var(--ab-white);
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(9, 162, 158, 0.32);
}

.btn svg {
  width: 16px;
  height: 16px;
}

.cta__meta {
  margin-top: 14px;
  font-size: 13px;
  color: var(--ab-body);
  text-align: center;
}

/* ---------- Footer ---------- */

footer {
  padding: 32px 0 48px;
  background: var(--ab-white);
  border-top: 1px solid var(--ab-line);
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--ab-body);
}

.footer-row a {
  color: var(--ab-teal-deep);
  font-weight: 500;
}

.footer-right {
  color: rgba(26, 18, 48, 0.6);
}

/* ---------- Mobile (tested at 375px) ---------- */

@media (max-width: 860px) {
  section {
    padding: 64px 0;
  }

  .hero {
    padding: 24px 0 64px;
  }

  .hero__top {
    margin-bottom: 40px;
  }

  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .opening__grid,
  .evidence__grid,
  .cta__wrap,
  .credibility .container {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .split {
    grid-template-columns: 1fr;
  }

  .credibility__badge {
    justify-self: start;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 20px;
  }

  .hero__meta {
    display: none;
  }

  .hero__logo img {
    height: 36px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero__sub {
    font-size: 16px;
  }

  .stat {
    padding: 16px;
  }

  .stat__value {
    font-size: 22px;
  }

  .card {
    padding: 24px;
  }

  .card h3 {
    font-size: 19px;
  }

  .section-head h2 {
    font-size: 24px;
  }

  .opening__body p {
    font-size: 16.5px;
  }
}

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