* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #2f2330;
  background: linear-gradient(180deg, #fff7fb 0%, #fff 240px);
}

.top-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
  padding: 0.75rem 1rem;
  background: rgba(255, 240, 247, 0.95);
  border-bottom: 1px solid #f3c4db;
  backdrop-filter: blur(6px);
}

.nav-link {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  color: #8a2a67;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-link:hover {
  background: #ffd9ea;
  color: #6d1f4f;
}

.nav-link.is-active {
  background: #ff8fbe;
  color: #fff;
}

.page-content {
  max-width: 1000px;
  margin: 1.2rem auto 3rem;
  padding: 0 1rem;
}

h1, h2, h3 {
  color: #7b255c;
}

a {
  color: #b13779;
}

a:hover {
  color: #8a2a67;
}

.back-to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 30;
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  color: #fff;
  background: #e04f96;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(111, 35, 82, 0.25);
}

.back-to-top:hover {
  background: #bc3e7d;
}