.nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(57, 255, 20, 0.25);
  border-radius: 4px;
  cursor: pointer;
  flex-shrink: 0;
  margin-left: var(--s-2);
  -webkit-tap-highlight-color: transparent;
  transition: border-color 200ms ease, background 200ms ease;
}
.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--green);
  background: rgba(57, 255, 20, 0.08);
}
.nav-toggle-bars {
  position: relative;
  width: 18px;
  height: 12px;
  display: block;
}
.nav-toggle-bars > span {
  position: absolute;
  left: 0; right: 0;
  height: 1.5px;
  background: var(--green);
  box-shadow: 0 0 6px rgba(57, 255, 20, 0.6);
  transition: transform 280ms cubic-bezier(.2,.8,.2,1),
              opacity 200ms ease,
              top 280ms cubic-bezier(.2,.8,.2,1);
}
.nav-toggle-bars > span:nth-child(1) { top: 0; }
.nav-toggle-bars > span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.nav-toggle-bars > span:nth-child(3) { top: 100%; }

html.nav-open .nav-toggle-bars > span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}
html.nav-open .nav-toggle-bars > span:nth-child(2) { opacity: 0; }
html.nav-open .nav-toggle-bars > span:nth-child(3) {
  top: 50%;
  transform: translateY(-50%) rotate(-45deg);
}


@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }


  .nav-links {
    display: flex;
    position: fixed;
    inset: 0;
    z-index: 49;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--s-3);
    padding: var(--s-7) var(--pad-x);
    background: rgba(3, 5, 3, 0.96);
    font-size: 18px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--ink);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition:
      opacity 240ms ease,
      transform 320ms cubic-bezier(.2,.8,.2,1),
      visibility 0s linear 320ms;
  }
  .nav-links a {
    padding: 12px 18px;
    min-height: 44px;
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .nav-links a .num {
    color: var(--green);
    font-size: 11px;
    opacity: 0.7;
  }

  html.nav-open .nav-links {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition:
      opacity 280ms ease,
      transform 380ms cubic-bezier(.2,.8,.2,1),
      visibility 0s linear 0s;
  }
  html.nav-open body { overflow: hidden; }


  .nav-status {
    font-size: 0;
    gap: var(--s-1);
  }
  .nav-status .pulse-dot { font-size: 0; }
  .nav-status .raw-toggle { font-size: 10px; }
}


@media (max-width: 380px) {
  .nav-brand { font-size: 12px; letter-spacing: 2px; }
  #visualizer { display: none; }
}