/* ---------- NAVBAR ---------- */
/* #region NAVBAR */
header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-radius: 0 0 2rem 2rem;
  height: 0;
}

header .navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 3rem;
  width: 100%;
  color: #fff;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  border-radius: 0 0 2rem 2rem;
  z-index: 20;
  font-size: 2rem;
}

header .navbar .logo {
  font-weight: 700;
}

header .navbar .logo a {
  color: inherit;
  text-decoration: none;
}

header .navbar .links {
  list-style: none;
  display: flex;
  gap: 3rem;
  margin: 0;
  padding: 0;
}

header .navbar .links a {
  color: #fff;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

header .navbar .links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: #0087ca;
  transform: scaleX(0);
  transition: transform 0.25s ease-out;
}

header .navbar .links a:hover::after,
header .navbar .links a:focus::after {
  transform: scaleX(1);
}

/* -------- Burger -------- */
/* #region Burger */
header .burger {
  display: none; /* shown on mobile */
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  position: relative;
}

header .burger span {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: #fff;
  transition: transform 0.3s ease, top 0.3s ease, opacity 0.2s ease;
}

header .burger span:nth-child(1) {
  top: 14px;
}

header .burger span:nth-child(2) {
  top: 21px;
}
header .burger span:nth-child(3) {
  top: 28px;
}
/* #endregion Burger */

/* Off-canvas menu */
header .side-menu {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: min(360px, 80vw);
  background: rgba(0, 51, 102, 0.7);
  backdrop-filter: blur(8px);
  transform: translateX(100%);
  transition: transform 0.5s ease;
  padding: 5rem 2rem 2rem;
  z-index: 30;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

header .side-menu nav {
  display: flex;
  flex-flow: column nowrap;
  gap: 0.5rem;
}

header .side-menu a {
  color: #fff;
  text-decoration: none;
  padding: 1rem;
  font-size: 1.6rem;
  border-bottom: 1px solid #fff;
}

header .side-menu .close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
}

/* Scrim (page dimmer) */
header .scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 25;
}

/* Open state */
header .side-menu.open {
  transform: none;
}
header .scrim.show {
  display: block;
}
header .scrim[hidden] {
  display: none;
}

/* Responsive: hide desktop links show burger */
@media (max-width: 900px) {
  header .navbar {
    padding: 1rem 1.25rem;
  }
  header .navbar .links {
    display: none;
  }

  header .burger {
    display: inline-block;
  }
}
/* #endregion */

/* ---- Respect prefers-reduced-motion ---- */
@media (prefers-reduced-motion: reduce) {
  /* Kill all animations/transitions/smooth scrolling */
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  /* Make hover underline appear instantly (no slide-in) */
  header .navbar .links a::after {
    transform: none !important;
  }

  /* Burger lines: keep them static (no tweening) */
  header .burger span {
    transform: none !important;
    opacity: 1 !important;
  }

  /* Off-canvas menu: open/close should be instant */
  header .side-menu {
    transition: none !important;
  }

  /* Scrim: no fade-in/out */
  header .scrim {
    transition: none !important;
  }
}