nav {
  position: sticky;
  top: 0;
  background: rgba(248, 251, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  color: var(--text);
}

.nav-right {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  margin-right: 20px;
}

.nav-links li a {
  font-size: 13px;
  color: var(--dim);
  padding: 7px 4px;
  margin: 0 10px;
  display: inline-block;
  position: relative;
}

.nav-links li a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--text);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-links li a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  padding: 9px 20px;
  border-radius: 3px;
  cursor: pointer;
  background: linear-gradient(to right, var(--accent) 50%, var(--text) 50%);
  background-size: 200% 100%;
  background-position: right;
  transition: background-position 0.55s cubic-bezier(0.22, 1, 0.36, 1);
  display: inline-block;
}

.nav-cta:hover {
  background-position: left;
}

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 28px;
  height: 20px;
  position: relative;
  z-index: 200;
  flex-direction: column;
  justify-content: space-between;
  padding: 0;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.mobile-nav-overlay {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(248, 251, 255, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 90;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 60px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.mobile-nav-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-links {
  list-style: none;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-links li a {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 300;
  color: var(--text);
  padding: 8px 0;
  display: inline-block;
  transition: color 0.2s;
}

.mobile-nav-links li a:hover {
  color: var(--accent);
}

@media (max-width: 900px) {
  .nav-inner {
    padding: 0 24px;
  }

  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }
}

@media (min-width: 901px) {
  .mobile-nav-overlay {
    display: none;
  }
}