/* ===============================
HEADER BASE
=============================== */

nav {
  --nav-fg: #ffffff;

  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  padding: 28px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
  background: transparent;
  border-bottom: 1px solid transparent;
  color: var(--nav-fg);
  transition:
    padding .22s ease,
    background .22s ease,
    border-color .22s ease,
    box-shadow .22s ease,
    color .2s ease;
}

nav > * {
  pointer-events: auto;
}

/* ===============================
HEADER THEMES
=============================== */

nav.theme-light {
  --nav-fg: #ffffff;
}

nav.theme-dark {
  --nav-fg: #0b1020;
}

/* ===============================
HEADER HERO
=============================== */

.brand {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: currentColor;
}

.nav-links {
  display: flex;
  gap: 40px;
  align-items: center;
}

.nav-links > a,
.nav-dropdown-toggle,
.menu-btn {
  font-family: "Montserrat", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  opacity: 0.9;
  color: currentColor;
  transition: opacity .2s ease, color .2s ease;
}

.nav-links > a:hover,
.nav-dropdown:hover .nav-dropdown-toggle,
.menu-btn:hover {
  opacity: 1;
}

/* ===============================
SCROLLED (FROST GLASS)
=============================== */

nav.scrolled {
  padding: 16px 60px;
  background: rgba(255,255,255,0.58);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: rgba(11,16,32,0.10);
  box-shadow: 0 18px 55px rgba(11,16,32,0.10);
  --nav-fg: #0b1020;
}

nav.scrolled .brand,
nav.scrolled .nav-links > a,
nav.scrolled .nav-dropdown-toggle,
nav.scrolled .menu-btn {
  color: currentColor;
}

/* ===============================
ACTIVE LINKS
=============================== */

.nav-links a.is-active,
.mobile-panel a.is-active,
.nav-dropdown-toggle.is-active,
.mobile-dropdown-toggle.is-active {
  color: #00aeef !important;
}

/* ===============================
DROPDOWN
=============================== */

.nav-dropdown {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-dropdown-toggle {
  appearance: none;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.nav-dropdown-caret {
  font-size: 10px;
  transform: translateY(-1px);
  transition: transform .2s ease;
}

.nav-dropdown:hover .nav-dropdown-caret,
.nav-dropdown.open .nav-dropdown-caret {
  transform: translateY(-1px) rotate(180deg);
}

/* ===============================
SUBMENU
=============================== */

.nav-submenu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 420px;
  padding: 20px;
  border-radius: 24px;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(11,16,32,0.10);
  box-shadow: 0 22px 60px rgba(11,16,32,0.10);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}

.nav-submenu::before {
  content: "";
  position: absolute;
  top: -14px;
  left: 0;
  right: 0;
  height: 14px;
}

.nav-submenu a {
  display: block;
  padding: 14px 18px;
  border-radius: 14px;
  font-family: "Montserrat", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #0b1020;
}

.nav-submenu a:hover {
  background: rgba(0,174,239,0.08);
}

.nav-dropdown:hover .nav-submenu,
.nav-dropdown.open .nav-submenu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

/* ===============================
MOBILE MENU
=============================== */

.menu-btn {
  display: none;
  width: 24px;
  height: 14px;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
  background: transparent;
  border: none;
  padding: 0;
}

.menu-btn span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: background .2s ease;
}

.menu-btn span:last-child {
  width: 70%;
  align-self: flex-end;
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  padding: 90px 22px 22px;
  background: rgba(255,255,255,0.66);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.mobile-menu.open {
  display: block;
}

.mobile-panel {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid rgba(11,16,32,0.10);
  background: rgba(255,255,255,0.8);
}

.mobile-panel > a,
.mobile-dropdown-toggle {
  display: block;
  width: 100%;
  padding: 14px 12px;
  border-radius: 12px;
  font-family: "Montserrat", sans-serif;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: #0b1020;
}

.mobile-panel > a:hover,
.mobile-dropdown-toggle:hover,
.mobile-submenu a:hover {
  background: rgba(0,174,239,0.08);
}

.mobile-dropdown-toggle {
  border: none;
  background: transparent;
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-dropdown-arrow {
  font-size: 18px;
  transition: transform .2s ease;
}

.mobile-dropdown.open .mobile-dropdown-arrow {
  transform: rotate(45deg);
}

.mobile-submenu {
  display: none;
  padding: 6px 0 6px 12px;
}

.mobile-dropdown.open .mobile-submenu {
  display: block;
}

.mobile-submenu a {
  display: block;
  padding: 12px;
  border-radius: 12px;
  font-family: "Montserrat", sans-serif;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: #0b1020;
}

.mobile-close {
  position: absolute;
  top: 26px;
  right: 22px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(11,16,32,0.12);
  border-radius: 12px;
  background: rgba(255,255,255,0.55);
  color: #0b1020;
  font-size: 18px;
  cursor: pointer;
}

/* ===============================
RESPONSIVE
=============================== */

@media (max-width: 1100px) {
  nav {
    padding: 24px 22px;
  }

  nav.scrolled {
    padding: 14px 22px;
  }
}

@media (max-width: 720px) {
  .nav-links {
    display: none;
  }

  .menu-btn {
    display: flex;
  }
}