.topbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1rem 0;
  background: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.58);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), background 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), padding 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.topbar.scrolled {
  background: transparent;
  box-shadow: 0 18px 36px -28px rgba(17, 40, 76, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.72);
  padding: 0.78rem 0;
}

.topbar.topbar-hidden {
  transform: translateY(calc(-100% - 10px));
  box-shadow: none;
}

.topbar-inner {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.78rem;
  font-family: "Outfit", system-ui, -apple-system, sans-serif;
  font-size: 1.06rem;
  font-weight: 700;
  color: #10203d;
  letter-spacing: -0.01em;
}

.brand img {
  height: 48px;
  width: auto;
  display: block;
}

nav {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  position: relative;
}

nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

nav a {
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  font-size: 0.93rem;
  font-weight: 500;
  color: #4b5f82;
  padding: 0.5rem 0.86rem;
  border-radius: 8px;
  position: relative;
}

nav a:hover {
  color: #6d28d9;
  background: rgba(139, 92, 246, 0.12);
}

nav a:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

nav a::after {
  content: "";
  position: absolute;
  left: 0.86rem;
  right: 0.86rem;
  bottom: 0.28rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(120deg, rgba(139, 92, 246, 0.92), rgba(59, 130, 246, 0.86));
  opacity: 0;
  transform: scaleX(0.5);
  transform-origin: center;
  transition: transform var(--motion-fast, 0.22s) var(--motion-ease, cubic-bezier(0.2, 0.8, 0.2, 1)), opacity var(--motion-fast, 0.22s) var(--motion-ease, cubic-bezier(0.2, 0.8, 0.2, 1));
}

nav a:hover::after,
nav a:focus-visible::after {
  opacity: 0.92;
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.menu-toggle:hover {
  background: rgba(16, 32, 61, 0.08);
}

.menu-toggle span {
  width: 22px;
  height: 2px;
  border-radius: 4px;
  background: #10203d;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.22s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.menu-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 992px) {
  nav ul {
    display: none;
  }

  nav ul.show {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0.8rem;
    min-width: 205px;
    padding: 0.9rem;
    border-radius: 20px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.76);
    box-shadow: 0 18px 36px -28px rgba(17, 40, 76, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    gap: 0.2rem;
  }

  nav ul.show a {
    color: #4b5f82;
    border-radius: 8px;
    padding: 0.58rem 0.82rem;
  }

  nav ul.show a:hover {
    color: #6d28d9;
    background: rgba(139, 92, 246, 0.12);
  }

  .menu-toggle {
    display: flex;
  }
}

@media (max-width: 576px) {
  .topbar {
    padding: 0.74rem 1rem;
  }

  .topbar-inner {
    padding: 0 1rem;
  }

  .brand img {
    height: 40px;
  }

  .brand {
    font-size: 0.98rem;
  }
}