html {
  scroll-behavior: smooth; }

#intro {
  background: url("../img/background.jpg") no-repeat center center;
  background-size: cover; }

.top-nav-collapse {
  background-color: #3949ab !important; }

.navbar:not(.top-nav-collapse) {
  background: transparent !important; }

@media (max-width: 768px) {
  .navbar:not(.top-nav-collapse) {
    background: #3949ab !important; } }

#intro .h6 {
  font-weight: 300;
  line-height: 1.7; }

.site-bg-img {
  height: 100vh;
  min-height: 480px;
  max-height: 1080px; }

.hm-gradient .site-bg-img {
  background: rgba(42, 27, 161, 0.7);
  background: linear-gradient(45deg, rgba(42, 27, 161, 0.7), rgba(29, 210, 177, 0.7) 100%); }

@media (max-width: 450px) {
  .margins {
    margin-right: 1rem;
    margin-left: 1rem; } }

#contact {
  background: url("../img/img_1.jpg") no-repeat center center;
  background-size: cover; }

#game {
  background: url("../img/me-myself-and-i.jpg") no-repeat center center;
}

.cardBtnL {
  background-color: transparent;
  float: left;
  border: none;
  color: white;
  display: inline-block;
}

.cardBtnR {
  background-color: transparent;
  float: right;
  border: none;
  color: white;
  display: inline-block;
}

.cardBtn {
  background-color: #0074D9;
  color: white;
  padding: 5px;
  text-align: left;
  text-decoration: none;
  display: inline-block;
  font-size: 18px;
  font-weight: bold;
  font-family: Arial;
  margin: 5px 12px;
  border-radius: 7px;
}

.runBtn {
  background-color: #0074D9;
  border: none;
  color: white;
  padding: 6px;
  text-align: center;
  text-decoration: none;
  display: block;
  font-size: 20px;
  font-weight: bold;
  margin: 4px 2px;
  border-radius: 10px;
}

#defendArea {
  border: 2px solid white;
  margin: 1px;
  min-height: 400px;
  padding: 20px; 
  resize: both;
  overflow: auto;
}

#attackArea {
  border: 2px solid red;
  margin: 2px;
}

.collapsible {
  background-color: #3949ab !important;
  color: white;
  cursor: pointer;
  padding: 15px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 20px;
}

.collapsible:after {
  content: '\002B';
  color: white;
  font-weight: bold;
  float: right;
  margin-left: 5px;
}

.active:after {
  content: "\2212";
}

.content {
  padding: 0 18px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
  background-color: #3949ab !important;
}