.menu {
  background: var(--bg-menu);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  border-bottom: 1px solid var(--light-gray-color);
  border-top: 1px solid var(--light-gray-color);
  z-index: 1000;
  transition: background 0.4s ease, border-color 0.4s ease;
}

.menu-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
  gap: 2rem;
}

.menu h1 {
  font-size: 2.3rem;
  color: var(--text-primary);
  margin: 0;
  flex-shrink: 0;
}

.menu h1 a {
  color: inherit;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.menu h1 img {
  display: block;
  flex-shrink: 0;
  filter: invert(0);
  transition: filter 0.4s ease;
}

.dark-theme .menu h1 img {
  filter: invert(1) brightness(1.2);
}

.menu h1 span {
  white-space: nowrap;
}


.menu-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.menu-nav ul li a {
  display: block;
  padding: 2rem;
  font-size: 1.8rem;
  color: var(--text-primary);
  position: relative;
  white-space: nowrap;
  transition: color 0.3s ease;
}


.menu-nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 1rem;
  left: 50%;
  width: 0;
  height: 0.2rem;
  background: #0A1128;
  transition: all 300ms ease-in-out;
}

.menu-nav ul li a:hover::after {
  width: 50%;
  left: 25%;
}

.burger {
  position: relative;
  width: 40px;
  height: 30px;
  background: transparent;
  cursor: pointer;
  display: none;
  flex-shrink: 0;
}

.burger span {
  display: block;
  position: absolute;
  height: 4px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 9px;
  opacity: 1;
  left: 0;
  transform: rotate(0deg);
  transition: 0.25s ease-in-out, background 0.4s ease;
}

.burger span:nth-of-type(1) {
  top: 0;
  transform-origin: left center;
}

.burger span:nth-of-type(2) {
  top: 50%;
  transform: translateY(-50%);
  transform-origin: left center;
}

.burger span:nth-of-type(3) {
  top: 100%;
  transform-origin: left center;
  transform: translateY(-100%);
}

#burger-toggle:checked~.burger span:nth-of-type(1) {
  transform: rotate(45deg);
  top: 0;
  left: 5px;
}

#burger-toggle:checked~.burger span:nth-of-type(2) {
  width: 0;
  opacity: 0;
}

#burger-toggle:checked~.burger span:nth-of-type(3) {
  transform: rotate(-45deg);
  top: 28px;
  left: 5px;
}


@media (max-width: 768px) {
  .burger {
    display: block;
  }

  .menu-content {
    flex-wrap: wrap;
    padding-top: 1rem;
    padding-bottom: 1rem;
    position: relative;
  }

  .menu-nav {
    display: none;
    width: 100%;
    border-top: 1px solid var(--light-gray-color);
    padding: 1rem 0;
    background: var(--bg-menu);
    transition: background 0.4s ease;
  }


  #burger-toggle:checked~.menu-nav {
    display: block;
  }

  .menu-nav ul {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }

  .menu-nav ul li {
    width: 100%;
  }

  .menu-nav ul li a {
    padding: 1.2rem 2rem;
    width: 100%;
    font-size: 1.6rem;
  }

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

  .menu h1 {
    font-size: 1.8rem;
  }

  .menu h1 img {
    width: 32px;
    height: 32px;
  }
}

@media (max-width: 360px) {
  .menu h1 span {
    display: none;
  }
}