Николай Угольников

<svg width="39" height="34" viewBox="0 0 39 34" fill="none" xmlns="http://www.w3.org/2000/svg">
  <path d="M15.3029 22.2175L14.6578 31.2472C15.5808 31.2472 15.9805 30.8527 16.4599 30.3789L20.7873 26.2634L29.754 32.798C31.3985 33.71 32.5572 33.2297 33.0008 31.2925L38.8865 3.84768L38.8882 3.84606C39.4098 1.42693 38.009 0.480945 36.4068 1.07441L1.81054 14.2551C-0.550586 15.1671 -0.514836 16.477 1.40916 17.0704L10.254 19.8081L30.7989 7.01551C31.7658 6.37838 32.6449 6.7309 31.9218 7.36803L15.3029 22.2175Z" />
</svg>

svg {
  fill: blue
}

svg:hover {
  fill: green;
}

CSS-свойство z-index определяет положение позиционированного элемента и его дочерних элементов или флекс-элементов по оси z.

@import url("https://fonts.googleapis.com/css2?family=Roboto:wght@300&display=swap");
body {
  margin: 0;
}

* {
  font-family: "Roboto", sans-serif;
}
a {
  text-decoration: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.header-content {
  position: relative;
  display: flex;
  flex-direction: row;
  height: 80px;
  align-items: center;
  background-color: #fff;
  z-index: 100;
}

.mobilmenu {
  display: none;
}
.header-logo {
  width: 15%;
  font-size: 24px;
}

.header-menu {
  width: 70%;
}

.header-menu ul {
  padding: 0;
  margin: 0;
  text-align: center;
}

.header-menu li {
  display: inline;
  padding: 0 15px;
}

.header-menu a {
  color: #868e96;
  transition: color 0.5s ease;
  font-size: 18px;
}

.header-menu a:hover {
  color: #000;
}

.header-call {
  width: 15%;
}

.header-call a {
  color: #000;
  font-size: 18px;
}

.header-mobil-menu {
  display: none;
}

@media (max-width: 767px) {
  .burger {
    display: block;
    width: 50px;
    height: 50px;
    border: 0;
    background: transparent;
    cursor: pointer;
  }

  .burger__icon {
    display: block;
    position: relative;
    width: 100%;
    height: 5px;
    background: #000;
    transition: background 0s 0.2s;
  }

  .burger__icon:after,
  .burger__icon:before {
    position: absolute;
    background: #000;
    content: "";
    height: 5px;
    width: 100%;
    left: 0;
    top: 10px;
    transition-duration: 0.2s, 0.2s;
    transition-delay: 0.2s, 0s;
    transition-property: top, transform;
  }

  .burger__icon:before {
    top: -10px;
  }

  .burger.active .burger__icon {
    background: transparent;
  }

  .burger.active .burger__icon:after,
  .burger.active .burger__icon:before {
    top: 0;
    transform: rotate(45deg);
    transition-delay: 0s, 0.2s;
  }

  .burger.active .burger__icon:before {
    transform: rotate(-45deg);
  }
  .header-mobil-menu {
    position: relative;
    display: flex;
    width: 50%;
    z-index: 100;
    text-align: left;
    justify-content: flex-end;
    background-color: #fff;
  }
  .header-content {
    padding: 0 10px;
  }
  .header-logo {
    position: relative;
    width: 50%;
    z-index: 100;
    background-color: #fff;
  }

  .header-menu {
    display: none;
  }

  .header-call {
    display: none;
  }
  .mobilmenu {
    display: block;
    position: absolute;
    background-color: #fff;
    width: 100%;
    height: 200px;
    top: -120px;
    transition: top 0.4s ease;
    z-index: 1;
  }
  .mobilmenu.active {
    display: block;
    position: absolute;
    top: 80px;

    top: 80px;
  }
  .mobilmenu a {
    color: #000;
  }
  .mobilmenu li {
    list-style: none;
    padding-bottom: 15px;
  }
}

* {
    margin: 0;
    padding: 0;
}

button {
    -webkit-appearance: none;
    border-radius: 0;
}