:root {
  --bg: #0b0d12;
  --bg-soft: #11141b;
  --surface: #161a23;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e7e9ee;
  --text-muted: #9aa3b2;
  --accent: #7c5cff;
  --accent-2: #21d4fd;
  --accent-3: #ff8fb1;
  --accent-4: #ffd166;
  --radius: 16px;
  --max: 1120px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  scroll-behavior: smooth;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(11, 13, 18, 0.7);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: 18px;
}
.nav__logo {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b0d12;
  font-size: 14px;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  color: var(--text-muted);
}
.nav__links a:hover { color: var(--text); }
.nav__cta {
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg) !important;
  font-weight: 600;
}
.nav__cta:hover { background: #fff; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 24px 100px;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(800px 400px at 20% 10%, rgba(124, 92, 255, 0.25), transparent 60%),
    radial-gradient(700px 350px at 85% 20%, rgba(33, 212, 253, 0.18), transparent 60%),
    radial-gradient(600px 300px at 50% 90%, rgba(255, 143, 177, 0.15), transparent 60%);
  pointer-events: none;
}
.hero__content {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  text-align: center;
}
.hero__eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.hero__title {
  font-size: clamp(44px, 7vw, 84px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
}
.hero__title-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2) 50%, var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__lede {
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 36px;
}
.hero__lede em { color: var(--text); font-style: normal; font-weight: 500; }
.hero__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.hero__meta {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  padding-top: 36px;
  border-top: 1px solid var(--border);
  max-width: 560px;
  margin: 0 auto;
}
.hero__meta div {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero__meta strong {
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__meta span {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b0d12;
  box-shadow: 0 10px 30px -10px rgba(124, 92, 255, 0.6);
}
.btn--primary:hover {
  box-shadow: 0 14px 36px -10px rgba(124, 92, 255, 0.8);
}
.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.04); }
.btn--lg { padding: 16px 28px; font-size: 16px; }
.btn__arrow { transition: transform 0.2s ease; }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* ---------- Sections ---------- */
.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section__header h2 {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}
.section__header p { color: var(--text-muted); margin: 0; }

.apps {
  padding: 100px 24px;
  max-width: var(--max);
  margin: 0 auto;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  position: relative;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 200px at 0% 0%, var(--card-glow, transparent), transparent 60%);
  opacity: 0.5;
  pointer-events: none;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.16);
}
.card--ai { --card-glow: rgba(124, 92, 255, 0.25); }
.card--general { --card-glow: rgba(33, 212, 253, 0.22); }
.card--kids { --card-glow: rgba(255, 209, 102, 0.22); }

.card__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 22px;
  margin-bottom: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
}
.card--ai .card__icon { color: var(--accent); }
.card--general .card__icon { color: var(--accent-2); }
.card--kids .card__icon { color: var(--accent-4); }

.card h3 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.card p { color: var(--text-muted); margin: 0 0 20px; font-size: 15px; }
.card__tags {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.card__tags li {
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

/* ---------- About ---------- */
.about {
  padding: 100px 24px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.about__inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.about__inner h2 {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
}
.about__inner p {
  color: var(--text-muted);
  font-size: 17px;
  margin: 0 0 18px;
}
.about__inner .btn { margin-top: 24px; }

/* ---------- Footer ---------- */
.footer {
  padding: 32px 24px;
  border-top: 1px solid var(--border);
}
.footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 14px;
}
.footer__inner a:hover { color: var(--text); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
  .hero { padding: 80px 20px 70px; }
  .apps, .about { padding: 70px 20px; }
  .nav__links a:not(.nav__cta) { display: none; }
}