body {
  font-size: .875rem;
}

.feather {
  width: 16px;
  height: 16px;
}

/*
 * Sidebar
 */

.sidebar {
  position: fixed;
  top: 0;
  /* rtl:raw:
  right: 0;
  */
  bottom: 0;
  /* rtl:remove */
  left: 0;
  z-index: 100; /* Behind the navbar */
  padding: 48px 0 0; /* Height of navbar */
 /* box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);*/

}

@media (max-width: 767.98px) {
  .sidebar {
    top: 1rem;
  }
}

.sidebar-sticky {
  height: calc(100vh - 48px);
  overflow-x: hidden;
  overflow-y: auto; /* Scrollable contents if viewport is shorter than content. */
}

.sidebar .nav-link {
  font-weight: 400;
  color: #fff;
}

.sidebar .nav-link .feather {
  margin-right: 4px;
  color: #fff;
}

.sidebar .nav-link.active {
  color: #fff;
}

.sidebar .nav-link:hover .feather,
.sidebar .nav-link.active .feather {
  color: inherit;
}

.sidebar-heading {
  font-size: 1.15rem;
  color: #FFF;
}

/*
 * Navbar
 */

.navbar-brand {
  padding-top: .75rem;
  padding-bottom: .75rem;
  /*background-color: rgba(0, 0, 0, .25);
  box-shadow: inset -1px 0 0 rgba(0, 0, 0, .25);*/
}

.navbar .navbar-toggler {
  top: .25rem;
  right: 1rem;
}

.navbar .form-control {
  padding: .75rem 1rem;
}

.form-control-dark {
  color: #fff;
  background-color: rgba(255, 255, 255, .1);
  border-color: rgba(255, 255, 255, .1);
}

.form-control-dark:focus {
  border-color: transparent;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, .25);
}



/* Button */
.container {
  display: flex;
  justify-content: center;

}
.button {
  text-align: center;
  padding: 0.5em 2em;
  font-weight: bold;
  border: none;
  outline: none;
  color: #000;
  cursor: pointer;
  position: relative;
  z-index: 0;
  border-radius: 10px;
  font-size: 18px;
  user-select: none;
  -webkit--user-select: none;
  touch-action: manipulation;
}

.button:before {
  content: "hello";
  background: linear-gradient(
    45deg,
    #ff0000,
    #ff7300,
    #fffb00,
    #48ff00,
    #00ffd5,
    #002bff,
    #7a00ff,
    #ff00c8,
    #ff0000
  );
  position: absolute;
  top: -2px;
  left: -2px;
  background-size: 400%;
  z-index: -1;
  filter: blur(5px);
  -webkit-filter: blur(5px);
  width: calc(100% + 4px);
  height: calc(100% + 4px);
  animation: glowing 20s linear infinite;
  transition: opactiy 0.3s ease-in-out;
  border-radius: 10px;
}

@keyframes glowing {
  0% {
    background-position: 0 0;
  }
  50% {
    background-position: 400% 0;
  }
  100% {
    background-position: 0 0;
  }
}

.button:after {
  z-index: -1;
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  background: #FFC107;
  left: 0;
  top: 0;
  border-radius: 10px;
}