.header {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-fixed);
  background-color: var(--body-color);
}

.container {
  max-width: 968px;
  margin-left: auto;
  margin-right: auto;
}

.nav {
  height: calc(var(--header-height) + 1.5rem);
  display: flex;
  justify-content: space-between;
  align-items: center;
  column-gap: 1rem;
}

.nav__logo,
.nav__toggle {
  color: var(--title-color);
  font-weight: var(--font-medium);
  text-decoration: none;
}

.nav__list {
  display: flex;
  margin: 0;
  padding: 0;
  column-gap: 2rem;
  list-style: none;
}

.nav__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-color);
  font-size: var(--small-font-size);
  font-weight: var(--font-medium);
  text-decoration: none;
  transition: 0.3s;
}

.nav__icon,
.nav__close,
.nav__toggle {
  display: none;
}

.active-link,
.nav__link:hover {
  color: var(--title-color-dark);
}

.scroll-header {
  box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.15);
}

.theme-toggle {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: var(--z-tooltip, 10);
  display: flex;
  width: 50px;
  height: 50px;
  padding: 0;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--border-color);
  border-radius: 50%;
  background-color: var(--container-color);
  box-shadow: var(--shadow-sm);
  color: var(--text-color);
  font: inherit;
  cursor: pointer;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  transform: translateY(-2px);
  border-color: var(--title-color);
  box-shadow: var(--shadow-md);
  color: var(--title-color);
}

.theme-toggle i {
  font-size: 1.5rem;
}

@media screen and (max-width: 992px) {
  .container {
    margin-left: 1.5rem;
    margin-right: 1.5rem;
  }
}

@media screen and (max-width: 768px) {
  body {
    margin-bottom: var(--header-height) !important;
  }

  .header {
    top: initial;
    bottom: 0;
  }

  .nav {
    height: var(--header-height);
  }

  .nav__menu {
    position: fixed;
    bottom: -100%;
    left: 0;
    width: 100%;
    background-color: var(--body-color);
    padding: 2rem 1.5rem 4rem;
    box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.15);
    border-radius: 1.5rem 1.5rem 0 0;
    transition: 0.3s;
  }

  .show-menu {
    bottom: 0;
  }

  .nav__list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .nav__icon {
    color: var(--text-color);
    font-size: 1.2rem;
  }

  .nav__close {
    position: absolute;
    right: 1.3rem;
    bottom: 0.5rem;
    color: var(--title-color);
    font-size: 1.5rem;
    cursor: pointer;
  }

  .nav__close:hover {
    color: var(--title-color-dark);
  }

  .nav__toggle {
    font-size: 1.1rem;
    cursor: pointer;
  }

  .nav__icon,
  .nav__close,
  .nav__toggle {
    display: block;
  }

  .theme-toggle {
    right: 1rem;
    bottom: 4.5rem;
    width: 42px;
    height: 42px;
  }

  .theme-toggle i {
    font-size: 1.2rem;
  }
}

@media screen and (max-width: 576px) {
  .theme-toggle {
    right: 0.75rem;
  }
}

@media screen and (max-width: 350px) {
  .nav__menu {
    padding: 2rem 0.25rem 4rem;
  }

  .nav__list {
    column-gap: 0;
  }

  .theme-toggle {
    right: 0.75rem;
    bottom: 4.25rem;
    width: 38px;
    height: 38px;
  }

  .theme-toggle i {
    font-size: 1.1rem;
  }
}