/* Modern fixed navbar — no sticky layout shift */
:root {
  --nav-h: 68px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  pointer-events: none;
  font-family: "Ubuntu", sans-serif;
}

.site-nav {
  pointer-events: auto;
  height: 100%;
  background: rgba(0, 0, 0, 0.82);
  border-bottom: none;
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled .site-nav {
  background: rgba(0, 0, 0, 0.96);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 100%;
}

/* Logo — original colors */
.site-nav__logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  color: #ff0000;
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
}

.site-nav__logo span {
  background: linear-gradient(135deg, #fffb00, #fbff00, rgb(255, 251, 0));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.site-header.is-scrolled .site-nav__logo span {
  -webkit-text-fill-color: #fff;
  background: none;
  color: #fff;
}

/* Desktop links */
.site-nav__panel {
  display: flex;
  align-items: center;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 8px 12px;
  color: #fbff00;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.03em;
  white-space: nowrap;
  overflow: hidden;
  border-radius: 6px;
  transition: color 0.22s ease;
}

.site-nav__link::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 247, 255, 0.08);
  border-radius: 6px;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background: #00f7ff;
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

.site-nav__link:hover {
  color: #00f7ff;
}

.site-nav__link:hover::before {
  opacity: 1;
  transform: scale(1);
}

.site-nav__link:hover::after {
  transform: scaleX(1);
}

.site-header.is-scrolled .site-nav__link:hover {
  color: #ff0077;
}

.site-header.is-scrolled .site-nav__link:hover::after {
  background: #ff0077;
}

.site-nav__link.is-active {
  color: #00f7ff;
}

.site-nav__link.is-active::after {
  transform: scaleX(1);
}

/* Talk to AI — navbar text link */
.site-nav__ai-item {
  list-style: none;
  margin-left: 4px;
}

/* Burger */
.site-nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid rgba(251, 255, 0, 0.35);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
}

.site-nav__burger span {
  display: block;
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.28s ease, opacity 0.2s ease, background 0.2s ease;
}

.site-nav__burger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: #00f7ff;
}

.site-nav__burger.is-open span:nth-child(2) {
  opacity: 0;
}

.site-nav__burger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: #00f7ff;
}

/* Mobile overlay */
.site-nav__overlay {
  display: none;
}

@media (max-width: 1024px) {
  .site-nav__link {
    padding: 7px 9px;
    font-size: 14px;
  }

  .site-nav__logo {
    font-size: 22px;
  }
}

@media (max-width: 968px) {
  .site-nav__burger {
    display: flex;
  }

  .site-nav__overlay {
    display: block;
    position: fixed;
    inset: 0;
    top: var(--nav-h);
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 998;
  }

  .site-nav__overlay.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .site-nav__panel {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
    padding: 16px 20px 28px;
    background: #000;
    border-bottom: 1px solid rgba(0, 247, 255, 0.2);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1),
      opacity 0.28s ease,
      visibility 0.28s ease;
    z-index: 999;
  }

  .site-nav__panel.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .site-nav__links {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .site-nav__link {
    padding: 14px 18px;
    font-size: 18px;
    text-align: center;
    border: 1px solid rgba(251, 255, 0, 0.18);
    background: rgba(0, 8, 28, 0.6);
    opacity: 0;
    transform: translateY(10px);
  }

  .site-nav__panel.is-open .site-nav__link {
    animation: nav-link-in 0.38s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  }

  .site-nav__panel.is-open .site-nav__links li:nth-child(1) .site-nav__link { animation-delay: 0.04s; }
  .site-nav__panel.is-open .site-nav__links li:nth-child(2) .site-nav__link { animation-delay: 0.08s; }
  .site-nav__panel.is-open .site-nav__links li:nth-child(3) .site-nav__link { animation-delay: 0.12s; }
  .site-nav__panel.is-open .site-nav__links li:nth-child(4) .site-nav__link { animation-delay: 0.16s; }
  .site-nav__panel.is-open .site-nav__links li:nth-child(5) .site-nav__link { animation-delay: 0.20s; }
  .site-nav__panel.is-open .site-nav__links li:nth-child(6) .site-nav__link { animation-delay: 0.24s; }
  .site-nav__panel.is-open .site-nav__links li:nth-child(7) .site-nav__link { animation-delay: 0.28s; }
  .site-nav__panel.is-open .site-nav__links li:nth-child(8) .site-nav__link { animation-delay: 0.32s; }
  .site-nav__panel.is-open .site-nav__links li:nth-child(9) .site-nav__link { animation-delay: 0.36s; }

  .site-nav__ai-item {
    margin-left: 0;
    width: 100%;
  }

  @keyframes nav-link-in {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

@media (max-width: 500px) {
  .site-nav__logo {
    font-size: 19px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav__panel.is-open .site-nav__link {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

body.nav-open {
  overflow: hidden;
}