/* Header */
.main-header {
  padding: 10px 0 5px;
  border-bottom: 1px solid transparent;
  position: sticky;
  top: 0;
  z-index: 999;
  transition: background-color 220ms ease, padding 220ms ease, box-shadow 220ms ease, backdrop-filter 220ms ease;
  background: transparent;
}

.main-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

.logo {
  display: flex;
  align-items: center;
  font-weight: bold;
  font-size: 1.2em;
}

.logo a {
  vertical-align: middle;
  display: flex;
}

.logo img {
  max-height: 36px;
}

/* Compact / scrolled state */
.main-header.scrolled {
  /* keep header transparent itself; use pseudo for the glass effect */
  padding: 8px 0;
  box-shadow: 0 8px 30px rgba(10,20,30,0.08);
  max-width: 1480px;
  margin: 0 auto;
  top: 5px;
}

/* Glass background that fades in on scroll. It spans full width while content is constrained. */
.main-header::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 1;
  background: linear-gradient(180deg, rgba(255,255,255,0.75), rgba(255,255,255,0.60));
  backdrop-filter: blur(8px) saturate(1.02);
  opacity: 0;
  transition: opacity 220ms ease, transform 220ms ease;
  transform: translateZ(0);
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

.main-header.scrolled::before {
  opacity: 1;
}

.main-header.scrolled .logo img {
  /* max-height: 32px; */
  transition: max-height 220ms ease;
}

.main-header.scrolled .main-nav a {
  color: #333;
}
.main-header.scrolled .main-nav a:hover {
  color: #000000;
}


.main-header.scrolled .secondary-button {
  /* padding: 10px 20px; */
}

/* When header is transparent (top of page) keep darker nav links subtle */
.main-nav a {
  color: #333;
  transition: color 180ms ease;
  font-size: .9rem;
}

/* constrain header inner content to 1440px while the glass background spans full width */
.main-header .container {
  max-width: 1440px;
  margin: 0 auto;
  position: relative; /* ensure stacking above pseudo */
  z-index: 2;
}

.main-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  align-items: center;
}

.mobile-nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid rgba(21, 38, 61, 0.12);
  background: rgba(255, 255, 255, 0.9);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(21, 38, 61, 0.06);
}

.mobile-nav-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: #15263d;
  transition: transform 180ms ease, opacity 180ms ease;
}

.header-cta {
  flex-shrink: 0;
}

.main-nav .mobile-nav-cta {
  display: none !important;
}

.main-nav li {
  margin-left: 15px;
}

.main-nav a {
  text-decoration: none;
  color: #333;
  display: inline-block;
  padding: 8px 12px;
  border-radius: 0;
  position: relative;
  z-index: 0;
  transition: color 180ms ease;
  font-weight: 600;
}

.main-nav a::before {
  content: "";
  position: absolute;
  inset: 0.46em 0.2em 0.2em;
  border-radius: 0;
  background: rgba(21, 38, 61, 0.06);
  transform: rotate(-1.4deg) scaleX(0.18);
  transform-origin: left center;
  opacity: 0;
  transition: opacity 120ms ease, transform 280ms cubic-bezier(.22,.9,.24,1);
  z-index: -1;
}

.main-nav a:hover {
  color: #10181b;
}

.main-nav a:hover::before,
.main-nav a:focus-visible::before {
  opacity: 1;
  transform: rotate(-1.4deg) scaleX(1);
}

.main-nav a.is-active {
  color: #10181b;
}

.main-nav a.is-active::before {
  opacity: 1;
  transform: rotate(-1.4deg) scaleX(1);
  background: rgba(21, 38, 61, 0.08);
}

.main-nav a.is-active::after {
  opacity: 1;
  transform: scaleX(1);
}

.main-header.scrolled .main-nav a.is-active {
  color: #10181b;
}

@media (max-width: 900px) {
  body.mobile-nav-open {
    overflow: hidden;
  }

  .mobile-nav-toggle {
    display: inline-flex;
  }

  .header-cta {
    display: none;
  }

  .main-header .container {
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .main-nav {
    width: 100%;
    order: 3;
    display: none;
    padding-top: 6px;
  }

  .main-header.nav-open .main-nav {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 18px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 20px 48px rgba(16, 24, 27, 0.1);
    border: 1px solid rgba(21, 38, 61, 0.08);
  }

  .main-nav li {
    margin-left: 0;
  }

  .main-nav a {
    width: 100%;
    padding: 12px 14px;
    border-radius: 0;
  }

  .main-nav a::before {
    display: none;
  }

  .main-nav a:hover,
  .main-nav a:focus-visible,
  .main-nav a.is-active {
    background: rgba(21, 38, 61, 0.06);
    color: #10181b;
  }

  .main-header.nav-open .main-nav .mobile-nav-cta {
    display: inline-flex !important;
    width: 100%;
    margin-top: 10px;
  }

  .main-nav .mobile-nav-cta,
  .main-nav .mobile-nav-cta:hover,
  .main-nav .mobile-nav-cta:focus-visible,
  .main-nav .mobile-nav-cta.is-active {
    background: rgba(255, 255, 255, 0.88);
    color: var(--ink);
    border-color: rgba(21, 38, 61, 0.12);
    box-shadow: 0 10px 24px rgba(21, 38, 61, 0.06);
  }

  .main-nav .mobile-nav-cta::before,
  .main-nav .mobile-nav-cta::after {
    display: none !important;
  }

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

  .main-header.nav-open .mobile-nav-toggle span:nth-child(2) {
    opacity: 0;
  }

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