.nav-bar {
  display: flex;
  justify-content: space-around;
  align-items: center;
  background: #151515;
  padding: 10px 0;
  border-top: 1px solid #eee;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.03);
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100vw;
  z-index: 99;
}
.nav-btn {
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: #888;
  transition: color 0.2s;
  outline: none;
}
.nav-btn.active, .nav-btn:focus {
  color: #FFD03C;
  
}
.nav-btn svg, .nav-btn img {
  display: block;
  margin: 0 auto;
  width: 28px;
  height: 28px;
  transition: filter 0.2s;
}
.back-btn img {
  width: 28px;
  height: 28px;
  display: block;
}
.back-btn {
  background: none;
  border: none;
  padding: 10px;
  margin: 10px;
  cursor: pointer;
}
.back-btn img {
  width: 28px;
  height: 28px;
  display: block;
  
}

.nav-bar {
  display: flex;
  justify-content: space-around;
  align-items: center;
  background: #151515;
  padding: 10px 0;
  border-top: 1px solid #eee;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.03);
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100vw;
  z-index: 99;
}
.nav-btn {
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: #888;
  transition: color 0.2s;
  outline: none;
}
.nav-btn.active,
.nav-btn:focus {
  color: #FFD03C;

}
.nav-btn svg,
.nav-btn img {
  display: block;
  margin: 0 auto;
  width: 28px;
  height: 28px;
  transition: filter 0.2s;
}
.nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 60px;
  z-index: 1000;
  background: #000;
  display: flex;
  justify-content: space-around;
  align-items: center;
  border-top: 1px solid #333;
}

body {
  padding-bottom: 60px; /* чтобы контент не заходил под навбар */
  box-sizing: border-box;
}
body {
  margin: 0;
  padding: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  overflow-x: hidden;
}

.container {
  flex: 1;
  overflow-y: auto;
  padding-bottom: 80px; /* Чтобы контент не заезжал на навбар */
}

.nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: #000;
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 999;
  border-top: 1px solid #333;
}