.burger {
  display: none;            /* ❗ ховаємо на десктопі */
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.burger span {
  display: block;
  width: 100%;
  height: 3px;
  background: #1e40af;
  border-radius: 2px;
}

@media (max-width: 768px) {

  /* бургер видно */
  .burger {
    display: flex;
  }

  /* саме меню */
  nav {
    position: absolute;
    top: 64px;
    right: 16px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(2,6,23,0.12);
    padding: 12px 16px;

    display: none;
    z-index: 4000;
  }

  nav ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 0;
    padding: 0;
  }

  nav.open {
    display: block;
  }
}