:root {
  --primary: #3e4a3d;
  --header-h: 96px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 8px);
}

body.nav-open {
  overflow: hidden;
}

.skip-link {
  position: absolute;
  right: 16px;
  top: -48px;
  z-index: 200;
  border-radius: 12px;
  background: #3e4a3d;
  color: #fff;
  padding: 8px 14px;
}

.skip-link:focus {
  top: 12px;
}

.glass-nav,
.nav-bar {
  background: rgba(250, 248, 245, 0.28);
  backdrop-filter: blur(14px) saturate(1.25);
  -webkit-backdrop-filter: blur(14px) saturate(1.25);
  transition: background 0.35s ease, box-shadow 0.35s ease, height 0.35s ease;
}

body.is-scrolled .nav-bar {
  background: rgba(250, 248, 245, 0.78);
  box-shadow: 0 16px 40px rgba(62, 74, 61, 0.1);
}

.nav-bar {
  height: 88px;
}

body.is-scrolled .nav-bar {
  height: 68px;
}

.logo img {
  height: 64px;
  width: auto;
  transition: height 0.35s ease;
}

body.is-scrolled .logo img {
  height: 46px;
}

@media (max-width: 640px) {
  .logo img {
    height: 48px;
  }

  body.is-scrolled .logo img {
    height: 40px;
  }
}

.glass-sheet {
  background: rgba(255, 255, 255, 0.46);
  backdrop-filter: blur(22px) saturate(1.4);
  -webkit-backdrop-filter: blur(22px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow: 0 20px 60px rgba(62, 74, 61, 0.1);
}

.glass-dark {
  background: rgba(62, 74, 61, 0.62);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.hero-copy {
  background: rgba(62, 74, 61, 0.36);
  backdrop-filter: blur(16px) saturate(1.15);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  border: 1px solid rgba(250, 248, 245, 0.18);
}

.ken-burns {
  animation: kenburns 24s ease-out forwards;
  transform-origin: center center;
  will-change: transform;
}

@keyframes kenburns {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.12);
  }
}

[data-reveal] {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

[data-reveal][data-delay="1"] {
  transition-delay: 0.1s;
}

[data-reveal][data-delay="2"] {
  transition-delay: 0.2s;
}

[data-reveal][data-delay="3"] {
  transition-delay: 0.3s;
}

[data-reveal][data-delay="4"] {
  transition-delay: 0.4s;
}

[data-reveal][data-delay="5"] {
  transition-delay: 0.5s;
}

.treatment-card {
  transition: transform 0.45s ease, box-shadow 0.45s ease;
}

.treatment-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 28px 80px rgba(62, 74, 61, 0.16);
}

.treatment-card .price-value {
  display: inline-block;
  transition: transform 0.35s ease;
}

.treatment-card:hover .price-value {
  transform: scale(1.08);
}

.parallax-layer {
  will-change: transform;
}

.duration-chip:hover,
.duration-chip.is-active {
  background: #3e4a3d;
  color: #fff;
  border-color: #3e4a3d;
}

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

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

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

body.nav-open .mobile-nav {
  display: flex;
}

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

  .ken-burns,
  [data-reveal],
  .treatment-card,
  .treatment-card .price-value,
  .logo img,
  .nav-bar,
  .parallax-layer {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }

  [data-reveal] {
    opacity: 1;
  }
}