:root {
  scroll-behavior: smooth;
}

body.baby-ai-world-page {
  overflow-x: hidden;
}

.world-site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 78px;
  padding: 10px clamp(16px, 4vw, 56px);
  border-bottom: 1px solid rgba(126, 233, 255, 0.2);
  background: rgba(4, 12, 27, 0.92);
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(18px);
}

.world-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: #fff;
  text-decoration: none;
}

.world-brand img {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 24px rgba(105, 233, 255, 0.28);
}

.world-brand span {
  display: grid;
}

.world-brand strong {
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.world-brand small {
  color: #bfefff;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.world-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(5px, 1vw, 14px);
  margin-left: auto;
}

.world-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 10px;
  border-radius: 12px;
  color: #eafaff;
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.world-nav a:hover,
.world-nav a:focus-visible {
  color: #fff;
  background: rgba(105, 233, 255, 0.13);
  outline: 2px solid rgba(126, 233, 255, 0.7);
  outline-offset: 2px;
}

.world-menu-button {
  display: none;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-left: auto;
  border: 1px solid rgba(126, 233, 255, 0.4);
  border-radius: 14px;
  background: rgba(105, 233, 255, 0.1);
  color: #fff;
  font-size: 1.3rem;
}

.world-section-kicker {
  display: inline-block;
  margin-bottom: 8px;
  color: #9befff;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.kid-contact-form[role="note"] {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

section[id] {
  scroll-margin-top: 98px;
}

@media (max-width: 980px) {
  .world-site-header {
    flex-wrap: wrap;
    gap: 8px;
  }

  .world-menu-button {
    display: inline-flex;
  }

  .world-nav {
    display: none;
    flex: 1 0 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 10px 0 6px;
  }

  .world-nav.is-open {
    display: flex;
  }

  .world-nav a {
    justify-content: flex-start;
    min-height: 48px;
    padding: 0 14px;
  }
}

@media (max-width: 480px) {
  .world-site-header {
    min-height: 70px;
    padding: 8px 12px;
  }

  .world-brand img {
    width: 48px;
    height: 48px;
  }

  .world-brand small {
    font-size: 0.58rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    scroll-behavior: auto;
  }

  .world-nav *,
  .world-menu-button {
    transition: none !important;
  }
}

.world-powered-signature {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.055em;
  line-height: 1.25;
  white-space: nowrap;
}

.world-powered-signature strong {
  background: linear-gradient(90deg, #66f7ff, #ff72da);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 0.94rem;
  font-weight: 800;
  letter-spacing: 0.025em;
}