jarv.is/components/page-header/Header.module.css

.header {
  position: sticky;
  top: 0;
  width: 100%;
  height: 4.5em;
  padding: 0.7em 1.5em;
  border-bottom: 1px solid var(--kinda-light);
  background-color: var(--background-header);
  backdrop-filter: saturate(180%) blur(5px);
  z-index: 1000;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 865px;
  margin: 0 auto;
}

.nav > div {
  line-height: 0;
}

/*** left side: photo/name ***/

.left {
  flex: 1;
}

.name {
  display: inline-flex;
  align-items: center;
  color: var(--medium-dark);
  background: none;
  padding-bottom: 0;
}

.name .selfie {
  width: 50px;
  height: 50px;
  line-height: 0;
  padding: 0;
}

.name .selfie img {
  border: 1px solid var(--light) !important;
  border-radius: 50%;
}

.name:hover {
  color: var(--link);
}

.name:hover .selfie {
  opacity: 0.9;
}

.name span:last-of-type {
  margin: 0 0.6em;
  font-size: 1.2em;
  font-weight: 500;
  line-height: 1;
}

/*** right side: menu ***/

.menu {
  display: inline-flex;
  padding: 0;
  margin: 0;
}

.menu li {
  list-style: none;
  display: inline-flex;
  margin-left: 1.8em;
}

.menu li .link {
  display: inline-flex;
  align-items: center;
  color: var(--medium-dark);
  background: none;
  padding-bottom: 0;
}

.menu li .link:hover {
  color: var(--link);
}

.menu li .icon {
  width: 1.6em;
  height: 1.6em;
}

.menu li span {
  font-size: 0.95em;
  font-weight: 500;
  margin-left: 0.8em;
  line-height: 1;
}

.menu li.theme_toggle {
  margin-left: 1.25em;
}

@media screen and (max-width: 768px) {
  .header {
    padding: 0.75em 1.25em;
    height: 5.9em;
  }

  .left {
    flex: 0;
  }

  .name .selfie {
    width: 70px;
    height: 70px;
  }

  .name span:last-of-type {
    display: none;
  }

  .right {
    flex: 1;
    max-width: 325px;
    margin-left: 2.5em;
  }

  .menu {
    width: 100%;
    justify-content: space-between;
  }

  .menu li {
    margin-left: 0;
  }

  .menu li .icon {
    width: 1.8em;
    height: 1.8em;
  }

  /* hide text next to emojis on mobile */
  .menu li span {
    display: none;
  }

  .menu li.theme_toggle {
    margin-left: -0.3em;
  }
}

/* the home icon is redundant when space is SUPER tight */
@media screen and (max-width: 380px) {
  .right {
    max-width: 225px;
    margin-left: 1.6em;
  }

  .menu li:first-of-type {
    display: none;
  }
}