.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 22px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  transition: background .3s ease, backdrop-filter .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(6,6,15,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}

.nav-logo img {
  height: 26px;
  width: auto;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 44px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 42px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: #D5D5E2;
}

.nav-menu > a {
  transition: color .2s ease;
  position: relative;
}

.nav-menu > a:hover,
.nav-menu > a.is-current {
  color: #fff;
}

.nav-menu > a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -6px;
  height: 2px;
  background: var(--grad);
  border-radius: 2px;
  transition: right .25s ease;
}

.nav-menu > a:hover::after,
.nav-menu > a.is-current::after {
  right: 0;
}

.nav-dd {
  position: relative;
}

.nav-dd-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: none;
  border: none;
  color: #D5D5E2;
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 0;
  transition: color .2s ease;
}

.nav-dd-btn .chev {
  width: 12px;
  height: 12px;
  transition: transform .25s ease;
}

.nav-dd:hover .nav-dd-btn,
.nav-dd.open .nav-dd-btn,
.nav-dd-btn.is-active {
  color: #fff;
}

.nav-dd:hover .nav-dd-btn .chev,
.nav-dd.open .nav-dd-btn .chev {
  transform: rotate(180deg);
}

.nav-dd-panel {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding-top: 16px;
  min-width: 280px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .2s ease;
}

.nav-dd:hover .nav-dd-panel,
.nav-dd.open .nav-dd-panel,
.nav-dd:focus-within .nav-dd-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.nav-dd-card {
  background: rgba(12,12,26,0.94);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 8px;
  box-shadow: 0 28px 70px -24px rgba(0,0,0,0.85);
  display: grid;
  gap: 4px;
  transform: translateY(8px);
  transition: transform .22s ease;
}

.nav-dd:hover .nav-dd-card,
.nav-dd.open .nav-dd-card,
.nav-dd:focus-within .nav-dd-card {
  transform: translateY(0);
}

.nav-dd-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  transition: background .2s ease;
}

.nav-dd-item:hover {
  background: rgba(255,255,255,0.06);
}

.nav-dd-item.active {
  background: rgba(62,104,255,0.12);
}

.nav-dd-ic {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line);
  color: var(--teal);
}

.nav-dd-ic svg {
  width: 20px;
  height: 20px;
}

.nav-dd-tt {
  display: block;
  font-size: 14.5px;
  font-weight: 600;
  color: #fff;
}

.nav-dd-ds {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}

.lang {
  display: inline-flex;
  align-items: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.lang button {
  border: none;
  background: none;
  color: var(--text-dim);
  padding: 6px 14px;
  border-radius: 999px;
  transition: all .2s ease;
}

.lang button.active {
  background: #fff;
  color: #0B0B16;
}

.mobile-lang {
  display: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.05);
  color: #F5F7FF;
}

.nav-toggle-lines {
  position: relative;
  width: 18px;
  height: 18px;
  display: block;
}

.nav-toggle-lines span {
  position: absolute;
  left: 0;
  top: 8px;
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform .22s ease, opacity .22s ease;
  transform-origin: center;
}

.nav-toggle-lines span:first-child {
  transform: translateY(-5px);
}

.nav-toggle-lines span:last-child {
  transform: translateY(5px);
}

.nav.open .nav-toggle-lines span:first-child {
  transform: rotate(45deg);
}

.nav.open .nav-toggle-lines span:last-child {
  transform: rotate(-45deg);
}

@media (max-width: 1100px) {
  .nav-menu {
    gap: 26px;
    font-size: 14px;
  }
}

@media (max-width: 900px) {
  .nav {
    padding: 16px 22px;
  }

  .nav-logo img {
    height: 24px;
  }

  .nav-right {
    gap: 12px;
  }

  .lang-desktop {
    display: none;
  }

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

  .nav-menu {
    position: absolute;
    left: 18px;
    right: 18px;
    top: calc(100% + 10px);
    display: grid;
    gap: 2px;
    padding: 10px;
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 18px;
    background: rgba(12,12,26,0.96);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    box-shadow: 0 26px 70px -30px rgba(0,0,0,0.85);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity .22s ease, transform .22s ease, visibility .22s ease;
  }

  .nav.open .nav-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-menu > a,
  .nav-dd-btn {
    width: 100%;
    min-height: 38px;
    padding: 0 14px;
    border-radius: 11px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    line-height: 1;
    -webkit-tap-highlight-color: transparent;
  }

  .nav-menu > a:hover,
  .nav-menu > a:focus-visible,
  .nav-menu > a.is-current,
  .nav-dd-btn:hover,
  .nav-dd-btn:focus-visible {
    background: rgba(255,255,255,0.045);
    outline: none;
  }

  .nav-menu > a:active,
  .nav-dd-btn:active {
    background: rgba(255,255,255,0.07);
    transform: none;
  }

  .nav-menu > a::after {
    display: none;
  }

  .mobile-lang {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    min-height: 44px;
    margin-top: 4px;
    padding: 8px 10px 4px 14px;
    border-top: 1px solid rgba(255,255,255,0.08);
  }

  .mobile-lang-label {
    color: var(--text-dim);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .mobile-lang .lang {
    display: inline-flex;
    padding: 3px;
    font-size: 12px;
  }

  .mobile-lang .lang button {
    min-width: 44px;
    padding: 7px 12px;
  }

  .nav-dd {
    width: 100%;
  }

  .nav-dd .chev {
    display: block;
    flex-shrink: 0;
  }

  .nav-dd-panel {
    position: static;
    transform: none;
    min-width: 0;
    max-height: 0;
    padding-top: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    overflow: hidden;
    transition: max-height .24s ease, opacity .2s ease, padding-top .2s ease, visibility .2s ease;
  }

  .nav-dd:hover .nav-dd-panel,
  .nav-dd:focus-within .nav-dd-panel,
  .nav-dd:not(.open) .nav-dd-panel {
    max-height: 0;
    padding-top: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }

  .nav-dd.open .nav-dd-panel {
    max-height: 240px;
    padding-top: 4px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-dd-card {
    transform: none;
    gap: 2px;
    padding: 4px;
    border-radius: 13px;
    box-shadow: none;
    background: rgba(255,255,255,0.025);
  }

  .nav-dd-item {
    min-height: 48px;
    padding: 8px 10px;
    border-radius: 10px;
  }

  .nav-dd-ic {
    width: 32px;
    height: 32px;
    border-radius: 9px;
  }

  .nav-dd-ic svg {
    width: 17px;
    height: 17px;
  }

  .nav-dd-tt {
    font-size: 13px;
  }

  .nav-dd-ds {
    font-size: 10.5px;
    line-height: 1.35;
    margin-top: 1px;
  }
}

@media (max-width: 520px) {
  .nav {
    padding: 14px 18px;
  }
}