planet-wars/backend/static/style/base.css

.nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

.nav li {
    float: left;
    border-right: 1px solid #bbb;
}

.nav li:last-child {
    border-right: none;
}

.nav li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

.nav .active {
    color: #ff7f00;
}


/* Change the link color to #111 (black) on hover */

.nav li a:hover {
    filter: brightness(80%);
}

.content {
    height: 100%;
}

body {
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

.content {
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    background: black;
    color: #ff7f00;
    line-height: 1.5rem;
    overflow: hidden;
    align-items: center;
}

.info {
    max-width: 80%;
    width: 1000px;
}

.info a {
    /* color: inherit; */
    /* filter: saturate(100%); */

    /* filter: invert(75%); */
    color: #ff7f00;
    filter: brightness(0.5);

    font-weight: bold;
    text-decoration: none;
}

.info div {
    color: antiquewhite;
}

.info div h3, .info div h1 {
    color: #ff7f00;
    margin-bottom: 10px;
}

.info div p {
    /* color: #ff7f00; */
    margin: 5px 0;
}

@keyframes heartbeat
{
  0%
  {
    transform: rotate(-45deg) scale( .75 );
  }
  20%
  {
    transform: rotate(-45deg) scale( 1 );
  }
  40%
  {
    transform: rotate(-45deg) scale( .75 );
  }
  60%
  {
    transform: rotate(-45deg) scale( 1 );
  }
  80%
  {
    transform: rotate(-45deg) scale( .75 );
  }
  100%
  {
    transform: rotate(-45deg) scale( .75 );
  }
}

.heart {
    background-color: rgb(196, 0, 0);
    display: inline-block;
    height: 20px;
    margin: -7px 10px;
    position: relative;
    top: 0;
    transform: rotate(-45deg);
    width: 20px;

    filter: none;

    animation: heartbeat 2s infinite;
}

.heart:before,
.heart:after {
    content: "";
    background-color: rgb(196, 0, 0);
    border-radius: 50%;
    height: 20px;
    position: absolute;
    width: 20px;
}

.heart:before {
    top: -10px;
    left: 0;
}

.heart:after {
    left: 10px;
    top: 0;
}