body {
  transition: background-color 0.5s;
}

body.external-viewer-open {
  overflow: hidden;
}

#mini-overlay {
  cursor: pointer;
  display: none;
  height: 100%;
  left: 0;
  position: fixed;
  top: 0;
  width: 60%;
  z-index: 1;
}

#mini-window {
  background-color: #fff;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: fixed;
  right: 0;
  top: 0;
  transition: width 0.5s;
  width: 0;
  z-index: 2;
}

#btn-close {
  background-color: #c56fd5;
  border: 0;
  border-radius: 0;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  color: #fff;
  cursor: pointer;
  font-size: 26px;
  height: 40px;
  outline: none;
  position: fixed;
  right: -50px;
  top: 30px;
  transition: background-color 0.5s, box-shadow 0.5s, right 0.5s;
  width: 40px;
  z-index: 3;
}

#btn-close:hover {
  background-color: #0284c5;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

#btn-close:focus-visible,
#viewer-external-link:focus-visible,
.demo-btn:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

#mobile-viewer-header {
  display: none;
}

.external-viewer-frame {
  background: #f7f7f7;
  flex: 1 1 auto;
  min-height: 0;
  position: relative;
}

#mini-iframe {
  background: #fff;
  border: 0;
  height: 100%;
  inset: 0;
  opacity: 1;
  position: absolute;
  transition: opacity 0.18s ease;
  width: 100%;
}

.external-viewer-frame.is-loading #mini-iframe {
  opacity: 0;
}

#viewer-loading {
  align-items: center;
  color: #666;
  display: flex;
  flex-direction: column;
  font-size: 14px;
  gap: 16px;
  inset: 0;
  justify-content: center;
  position: absolute;
}

#viewer-loading[hidden] {
  display: none;
}

.viewer-loading-bar {
  background: #ddd;
  height: 2px;
  overflow: hidden;
  position: relative;
  width: min(220px, 56vw);
}

.viewer-loading-bar::after {
  animation: external-viewer-loading 1.1s ease-in-out infinite;
  background: #300030;
  content: "";
  inset: 0;
  position: absolute;
  transform: scaleX(0.34) translateX(-190%);
  transform-origin: left;
}

@keyframes external-viewer-loading {
  0% {
    transform: scaleX(0.34) translateX(-190%);
  }
  55% {
    transform: scaleX(0.5) translateX(90%);
  }
  100% {
    transform: scaleX(0.34) translateX(300%);
  }
}

.demo-btn {
  background-color: #0088cc;
  border: none;
  border-radius: 5px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  color: #fff;
  cursor: pointer;
  font-size: 20px;
  height: 45px;
  outline: none;
  transition: box-shadow 0.3s;
  width: 200px;
}

.demo-btn:hover {
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
  body {
    transition: none;
  }

  #mini-overlay {
    background: rgba(20, 12, 24, 0.24);
    height: 100dvh;
    width: 100%;
    z-index: 2;
  }

  #mini-window {
    border-radius: 14px 14px 0 0;
    box-shadow: 0 -18px 48px rgba(20, 12, 24, 0.2);
    height: 100dvh;
    top: 0;
    transform: translateY(100%);
    transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), border-radius 0.2s ease;
    width: 100% !important;
    z-index: 3;
  }

  body.external-viewer-open #mini-window {
    transform: translateY(14dvh);
  }

  body.external-viewer-open.external-viewer-expanded #mini-window {
    border-radius: 0;
    transform: translateY(0);
  }

  #mini-window.is-dragging {
    transition: none;
  }

  #mobile-viewer-header {
    align-items: center;
    background: #fff;
    border-bottom: 1px solid #ececec;
    cursor: grab;
    display: flex;
    flex: 0 0 64px;
    gap: 12px;
    min-width: 0;
    padding: 12px 58px 8px 16px;
    position: relative;
    touch-action: none;
    user-select: none;
  }

  #mini-window.is-dragging #mobile-viewer-header {
    cursor: grabbing;
  }

  .mobile-viewer-handle {
    background: #c8c8c8;
    border-radius: 999px;
    height: 4px;
    left: 50%;
    position: absolute;
    top: 7px;
    transform: translateX(-50%);
    width: 36px;
  }

  .mobile-viewer-meta {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    line-height: 1.25;
    min-width: 0;
  }

  #viewer-title,
  #viewer-source {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  #viewer-title {
    color: #222;
    font-size: 14px;
    font-weight: 600;
  }

  #viewer-source {
    color: #888;
    font-size: 11px;
  }

  #viewer-external-link {
    display: none;
  }

  #btn-close {
    background: transparent;
    border-radius: 4px;
    box-shadow: none;
    color: #555;
    height: 40px;
    position: absolute;
    right: 8px;
    top: calc(12px + env(safe-area-inset-top));
    transition: background-color 0.18s ease;
    width: 40px;
    z-index: 4;
  }

  #btn-close:hover {
    background: #f1f1f1;
    box-shadow: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  #mini-window,
  #btn-close,
  #mini-iframe {
    transition: none;
  }

  .viewer-loading-bar::after {
    animation: none;
    transform: scaleX(1);
  }
}