/* Hamburger button - hidden on desktop */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 9px;
  background: rgba(0, 234, 255, 0.08);
  border: 1px solid var(--cyan);
  border-radius: 8px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  flex-shrink: 0;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--cyan);
  border-radius: 3px;
  transition: 0.3s;
  box-shadow: 0 0 8px var(--cyan);
}

/* Desktop navigation */
#mainNav {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Phone and tablet navigation */
@media (max-width: 820px) {
  header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    gap: 12px;
    background: rgba(5, 6, 14, 0.97);
  }

  .logo-wrap {
    gap: 8px;
    min-width: 0;
  }

  .logo-wrap img {
    width: 40px;
    height: 40px;
  }

  .logo-text {
    font-size: 10px;
  }

  .logo-sub {
    font-size: 9px;
    letter-spacing: 2px;
  }

  .menu-toggle {
    display: flex;
  }

  #mainNav {
    display: none;
    position: absolute;
    top: 100%;
    left: 12px;
    right: 12px;
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    background: rgba(5, 6, 14, 0.98);
    border: 1px solid rgba(0, 234, 255, 0.4);
    border-radius: 12px;
    box-shadow: 0 10px 35px rgba(0, 234, 255, 0.15);
    backdrop-filter: blur(16px);
    max-height: calc(100dvh - 90px);
    overflow-y: auto;
  }

  #mainNav.open {
    display: flex;
  }

  #mainNav .tab-btn {
    display: block;
    width: 100%;
    text-align: center;
    padding: 13px 10px;
    font-size: 13px;
    border-radius: 7px;
  }

  #mainNav .tab-btn:hover {
    transform: none;
  }
}

/* Extra-small phones */
@media (max-width: 380px) {
  header {
    padding: 10px;
  }

  .logo-wrap img {
    width: 34px;
    height: 34px;
  }

  .logo-text {
    font-size: 8px;
  }

  .logo-sub {
    font-size: 8px;
    letter-spacing: 1px;
  }
}