.site-header {
  background: #fff;
  border-bottom: 1px solid #ccc;
  padding: 10px 15px;
  position: relative;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.logo img {
  max-width: 100%;
  height: auto;
}

.nav-toggle {
  display: block;
  width: 36px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  position: absolute;
  top: 15px;
  right: 15px;
  z-index: 100;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 4px;
  background-color: #333;
  margin: 5px 0;
  transition: all 0.4s ease;
  border-radius: 2px;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.nav {
  flex-basis: 100%;
  display: none;
}

.nav.open {
  display: block;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 10px 0;
  flex-direction: column;
}

.nav-list li {
  margin: 10px 0;
}

.nav-list a {
  text-decoration: none;
  color: #000;
  font-size: 1rem;
}

@media screen and (min-width: 768px) {
  .header-inner {
    flex-wrap: nowrap;
  }

  .nav-toggle {
    display: none;
  }

  .nav {
    display: block !important;
    flex-grow: 1;
    margin-left: 40px;
  }

  .nav-list {
    display: flex;
    flex-direction: row;
    gap: 20px;
    justify-content: flex-start;
    align-items: center;
  }

  .nav-list li {
    margin: 0;
  }
}