/* ================================================
   Navigation Styles – Qubic3D site
   ================================================ */

.nav {
  position: sticky;
  transform: translateY(0);
  will-change: transform;
  transition: transform .28s cubic-bezier(.2,.8,.2,1), box-shadow .2s ease;
  top: 0.25rem;
  left: 0;
  right: 0;
  width: calc(100% - 2rem);
  margin-inline: auto;
  z-index: 1000;
  background: rgba(9,10,22,.55);
  backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 1.5rem;
  box-shadow: 0 4px 16px rgba(0,0,0,.4);
  padding-inline: .5rem;
}

.nav .container {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: .5rem 1rem;
  container-type: inline-size;
  width: 100%;
  max-width: none;
  margin-inline: 0;
  position: relative;
}

.nav nav {
  flex: 0 1 auto;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-left: auto;
  margin-right: auto;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav nav a {
  padding: 0 0.75rem;
  font-weight: 600;
  position: relative;
  transition: color var(--motion-fade) var(--ease-out);
}

.nav nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-grad-a), var(--c-grad-b));
  transition: all var(--motion-slide) var(--ease-out);
  transform: translateX(-50%);
}

.nav nav a:hover::after {
  width: 100%;
}

.nav .cta {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-left: auto;
}

/* Logo styling */
.nav .logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  line-height: 1;
}

.nav .logo img {
  height: 40px;
  width: auto;
  display: block;
  flex-shrink: 0;
}

.nav .logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-text-hi);
  white-space: nowrap;
}

/* Desktop: larger logo */
@media (min-width: 1024px) {
  .nav .logo img {
    height: 48px;
  }
  
  .nav .logo-text {
    font-size: 1.5rem;
  }
}

/* Hamburger Icon */
.burger {
  display: none;
  background: none;
  border: 0;
  color: var(--c-text-hi);
  cursor: pointer;
  margin-left: .75rem;
  width: 16px;
  height: 16px;
  position: relative;
  padding: 0;
  z-index: 10;
  flex-shrink: 0;
  min-height: auto !important;
  min-width: auto !important;
}

.burger::before,
.burger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--c-text-hi);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 1px;
}

.burger::before {
  top: 3.5px;
}

.burger::after {
  bottom: 3.5px;
}

.burger span {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--c-text-hi);
  transform: translateY(-50%);
  transition: opacity 0.2s ease;
  border-radius: 1px;
}

.burger.is-open::before {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.burger.is-open::after {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

.burger.is-open span {
  opacity: 0;
}

/* Hide nav buttons inside full-width desktop view */
.nav nav .btn {
  display: none;
}

/* Mobile Navigation */
@media (max-width: 767px) {
  .nav .container {
    padding: .4rem .75rem;
    min-height: 48px;
  }

  .nav .cta {
    display: none;
  }

  .burger {
    display: block !important;
    margin-left: auto;
    width: 16px;
    height: 16px;
    min-height: auto !important;
    min-width: auto !important;
  }

  .nav nav {
    display: flex;
    flex-direction: column;
    gap: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    pointer-events: none;
    transform: translateY(-6px) scaleY(0.94);
    transform-origin: top;
    transition:
      opacity 0.2s ease,
      transform 0.24s cubic-bezier(.2,.8,.2,1),
      visibility 0.24s;
  }

  .nav nav a {
    padding: .75rem 1.25rem;
    width: 100%;
    text-align: left;
  }

  .nav nav .btn {
    display: block;
    margin: .75rem 1.25rem;
    width: auto;
    max-width: 200px;
  }

  body.nav-open .nav {
    position: fixed;
    top: 0.25rem;
    left: 0;
    right: 0;
    width: calc(100% - 2rem);
    z-index: 1001;
  }

  body.nav-open .nav .container {
    position: relative;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding-bottom: 0.75rem;
  }

  body.nav-open .logo {
    position: absolute;
    top: 0;
    left: 0;
    padding: 0.75rem 1rem;
    z-index: 2;
  }

  body.nav-open .burger {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    padding: 0;
    z-index: 10;
    width: 16px;
    height: 16px;
    min-height: auto !important;
    min-width: auto !important;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  body.nav-open .nav nav {
    width: 100%;
    display: flex !important;
    flex-direction: column;
    align-items: flex-start;
    margin-top: 2.75rem;
    position: static;
    left: auto;
    transform: none;
    margin-left: 0;
    margin-right: 0;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scaleY(1);
  }

  body.nav-open .nav nav .btn {
    display: block;
  }
}

/* Hide on scroll-down, show on scroll-up */
.nav.nav--hidden {
  transform: translateY(-200%);
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}

/* ================================================
   Dropdown Menu Styles
   ================================================ */

.nav-dropdown {
  position: relative;
  display: inline-block;
}

.nav-dropdown > a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  padding: 0 0.75rem;
  font-weight: 600;
  position: relative;
  transition: color var(--motion-fade) var(--ease-out);
  justify-content: space-between;
}

.nav-dropdown > a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #005AED, #8D29FF, #E300FF);
  transition: all var(--motion-slide) var(--ease-out);
  transform: translateX(-50%);
}

.nav-dropdown:hover > a::after {
  width: 100%;
}

.nav-dropdown > a::before {
  content: '▼';
  font-size: 0.7rem;
  transition: transform 0.2s ease;
  opacity: 0.7;
  order: 2;
  margin-left: auto;
}

.nav-dropdown:hover > a::before,
.nav-dropdown[aria-expanded="true"] > a::before {
  transform: rotate(180deg);
}

.nav-dropdown__menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 0.5rem;
  background: rgba(9, 10, 22, 0.95);
  backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0.75rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-10px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  z-index: 1001;
  padding: 0.5rem 0;
}

.nav-dropdown:hover .nav-dropdown__menu,
.nav-dropdown[aria-expanded="true"] .nav-dropdown__menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown__menu a {
  display: block;
  padding: 0.75rem 1.25rem;
  color: var(--c-text-hi);
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
  position: relative;
}

.nav-dropdown__menu a:hover {
  background: rgba(0, 90, 237, 0.1);
  color: var(--c-text-hi);
}

.nav-dropdown__menu a::after {
  display: none;
}

/* Mobile dropdown adjustments */
@media (max-width: 767px) {
  .nav-dropdown {
    width: 100%;
  }
  
  .nav-dropdown > a {
    width: 100%;
    text-align: left;
    padding: 0.75rem 1.25rem;
  }
  
  .nav-dropdown__menu {
    position: static;
    transform: none;
    margin-top: 0;
    margin-left: 1.25rem;
    width: calc(100% - 2.5rem);
    border-radius: 0.5rem;
    box-shadow: none;
    border: 1px solid rgba(255, 255, 255, 0.08);
  }
  
  .nav-dropdown[aria-expanded="true"] .nav-dropdown__menu {
    transform: none;
    display: block;
  }
  
  .nav-dropdown[aria-expanded="false"] .nav-dropdown__menu {
    display: none;
  }
}