html, body {
  margin: 0;
  padding: 0;
}

/* landing page */
.hero {
  padding: 3rem 1rem;
}

.hero img {
  max-width: 250px;
  border-radius: 1rem;
}

footer {
  padding: 2rem 0;
  text-align: center;
  font-size: 0.9rem;
}

/* app */
#container.spa {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  height: -webkit-fill-available;
  padding-top: 0;
}

header.navbar {
  flex: 0 0 auto;
}

.viewer-wrapper {
  flex: 1 1 auto;
  display: grid;
  grid-template-areas:
    "player"
    "context"
    "buttons"
    "toggle" ;
  grid-template-columns: 1fr;
  grid-template-rows: 40vh 1fr auto auto;
  overflow: hidden;
}

.edit-wrapper {
  display: none;
}

@media (min-width: 767px) {
  .viewer-wrapper {
    grid-template-rows: 66vh 1fr auto auto;
  }

  .viewer-wrapper:has(.edit-wrapper) {
    grid-template-areas:
      "player  editor"
      "context editor"
      "toggle  editor"
      "buttons buttons" ;
    grid-template-columns: 2fr 1fr;
  }

  .edit-wrapper {
    grid-area: editor;
    display: block;
    background: lightgray;
    margin-bottom: 0.5rem;
  }
}

.context {
  grid-area: context;
  margin: 1rem;
  overflow: hidden;
}

.button-row {
  grid-area: buttons;
  display: flex;
  flex-direction: row;
  gap: 0.5rem;
  margin: 0.5rem;
  margin-top: 0;
}

.toggle-row {
  grid-area: toggle;
  margin: 0.5rem;
  margin-top: 0;
}


.player-wrapper {
  grid-area: player;
}

.player-wrapper > iframe, .player-wrapper > div {
  width: 100%;
  height: 100%;
}


/* transition context */
.context {
  position: relative;
  overflow: hidden;
  min-height: 3em;
}

.context p {
  animation: slide-in 0.3s ease-out;
}

@keyframes slide-in {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0%);
    opacity: 1;
  }
}

/* pop the continue button */
.pop {
    animation: pop 0.4s ease;
}

@keyframes pop {
  0% {
    transform: scale(1) translateY(0);
  }
  50% {
    transform: scale(1.3) translateY(-20px);
  }
  100% {
    transform: scale(1) translateY(0);
  }
}


/* tidy modals */
.pane-stack {
  position: relative;
}

.pane {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* All panes except the first child are overlays */
.pane-stack > .pane:not(:first-child) {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.pane.pane-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}

.pane.pane-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.pane.pane-dim {
  opacity: 0.4;
  pointer-events: none;
}