.bd-placeholder-img {
  font-size: 1.125rem;
  text-anchor: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

@media (min-width: 768px) {
  .bd-placeholder-img-lg {
    font-size: 3.5rem;
  }
}

.b-example-divider {
  height: 3rem;
  background-color: rgba(0, 0, 0, .1);
  border: solid rgba(0, 0, 0, .15);
  border-width: 1px 0;
  box-shadow: inset 0 .5em 1.5em rgba(0, 0, 0, .1), inset 0 .125em .5em rgba(0, 0, 0, .15);
}

.b-example-vr {
  flex-shrink: 0;
  width: 1.5rem;
  height: 100vh;
}

.bi {
  vertical-align: -.125em;
  fill: currentColor;
}

.nav-scroller {
  position: relative;
  z-index: 2;
  height: 2.75rem;
  overflow-y: hidden;
}

.nav-scroller .nav {
  display: flex;
  flex-wrap: nowrap;
  padding-bottom: 1rem;
  margin-top: -1px;
  overflow-x: auto;
  text-align: center;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.nav-icon {
  height: 35px;
  width: 35px;
}

/* Show it is fixed to the top */
body {
  /* min-height: 75rem; */
  padding-top: 4.5rem;
}

.spin-icon {
  font-size: 24px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.paper-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  justify-content: center;
  padding: 20px;
}

.paper-card {
  background: #fff;
  border: 2px solid #007bff;
  border-radius: 10px;
  padding: 15px;
  width: 220px;
  text-align: center;
  box-shadow: 0px 5px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.paper-card:hover {
  transform: scale(1.05);
  box-shadow: 0px 8px 15px rgba(0, 0, 0, 0.2);
}

.paper-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 10px;
}

.paper-info h5 {
  font-size: 16px;
  font-weight: bold;
  color: #007bff;
}

.paper-info p {
  font-size: 14px;
  color: #555;
  margin: 5px 0;
}

/* Default background */
body.bg-default {
  background: url('../img/bg/bg.png') no-repeat center center fixed;
  background-size: cover;
  position: relative;
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
}

/* Background when logged in */
body.bg-logged-in {
  background: url('../img/bg/bg2r.png') no-repeat center center fixed;
  background-size: cover;
  position: relative;
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
}

/* Blur effect */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backdrop-filter: blur(1px);
  /* Adjust blur intensity */
  background: rgba(255, 255, 255, 0.05);
  z-index: -1;
}

/* Canvas for animation */
#interactive-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
}

.question-box img {
  width: 400px;
  height: auto;
  display: block;
  margin: auto;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 5px;
  background: #f8f9fa;
}