* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  font-family: Arial, Helvetica, sans-serif;
  color: #111;
  background: #fff;
}

body {
  margin: 0;
}

main {
  height: 100dvh;
  display: grid;
  grid-template-rows: 52px minmax(0, 1fr);
}

header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 0 18px;
  border-bottom: 1px solid #111;
  transition: background-color 120ms ease;
}

body.correct header {
  background: #a9cfae;
}

body.wrong header {
  background: #dfa7a7;
}

.logo {
  width: max-content;
  color: inherit;
  font-size: 18px;
  font-weight: 800;
  text-decoration: none;
}

header p {
  margin: 0;
  font-size: 14px;
}

#status {
  font-weight: 700;
  text-align: center;
}

.header-right {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 12px;
}

#progress {
  font-variant-numeric: tabular-nums;
}

#settings-button {
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  color: #111;
  background: transparent;
  font-size: 21px;
  line-height: 32px;
}

#settings-button:hover,
#settings-button:focus-visible {
  background: #0001;
}

#settings {
  position: absolute;
  z-index: 10;
  top: 44px;
  right: 12px;
  display: grid;
  gap: 12px;
  min-width: 220px;
  padding: 14px;
  border: 1px solid #111;
  color: #111;
  background: #fff;
  box-shadow: 0 5px 20px #0002;
  font-size: 14px;
}

#settings label {
  display: flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
}

#settings input {
  width: 17px;
  height: 17px;
  margin: 0;
  accent-color: #111;
}

#mode-select {
  align-self: center;
  justify-self: center;
  max-width: 620px;
  padding: 32px 24px;
  text-align: center;
}

#mode-select h1 {
  margin: 0 0 10px;
  font-size: clamp(28px, 5vw, 44px);
}

#mode-select p {
  margin: 0 auto 26px;
  color: #555;
  line-height: 1.5;
}

.mode-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.mode-buttons button {
  display: grid;
  gap: 8px;
  min-height: 110px;
  padding: 18px 12px;
  border: 1px solid #111;
  color: #111;
  background: #fff;
  text-align: center;
}

.mode-buttons button:hover,
.mode-buttons button:focus-visible {
  color: #fff;
  background: #111;
}

.mode-buttons strong {
  font-size: 18px;
  text-transform: uppercase;
}

.mode-buttons span {
  font-size: 12px;
  line-height: 1.35;
}

#change-mode {
  padding: 7px 9px;
  border: 1px solid #111;
  color: #111;
  background: #fff;
}

#change-mode:hover,
#change-mode:focus-visible {
  color: #fff;
  background: #111;
}

#image-stage {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(70px, 1fr) auto minmax(70px, 1fr);
  align-items: center;
  gap: 18px;
  padding: 12px 18px;
}

#image-wrap {
  position: relative;
  grid-column: 2;
  max-width: calc(100vw - 260px);
  max-height: calc(100dvh - 76px);
  line-height: 0;
}

#quiz-image {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: calc(100dvh - 76px);
  object-fit: contain;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.choice {
  min-width: 0;
  padding: 18px 8px;
  border: 0;
  color: #111;
  background: transparent;
  font-size: 18px;
  font-weight: 800;
}

.choice:hover,
.choice:focus-visible {
  text-decoration: underline;
  text-underline-offset: 5px;
}

#ai-button {
  grid-column: 1;
  justify-self: end;
}

#real-button {
  grid-column: 3;
  justify-self: start;
}

kbd {
  font: inherit;
}

.marker {
  position: absolute;
  z-index: 1;
  width: 26px;
  height: 30px;
  min-height: 0;
  padding: 0;
  transform: translate(-50%, -50%);
  border: 0;
  color: #fff;
  background: transparent;
  font-size: 21px;
  font-weight: 900;
  line-height: 30px;
  text-align: center;
  text-shadow:
    -1px -1px 2px #000,
    1px -1px 2px #000,
    -1px 1px 2px #000,
    1px 1px 2px #000,
    0 2px 5px #000;
}

.marker:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.marker .marker-number {
  transition: opacity 100ms ease;
}

.marker:hover .marker-number,
.marker:focus-visible .marker-number,
.marker.open .marker-number {
  opacity: 0;
}

.marker .tooltip {
  position: absolute;
  z-index: 2;
  bottom: calc(100% + 7px);
  left: 50%;
  width: min(240px, 70vw);
  padding: 9px 11px;
  transform: translateX(-50%);
  color: #fff;
  background: #111;
  box-shadow: 0 2px 12px #0006;
  font-size: 13px;
  font-weight: 400;
  line-height: 1.35;
  text-align: left;
  text-shadow: none;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
}

.marker:hover .tooltip,
.marker:focus-visible .tooltip,
.marker.open .tooltip {
  opacity: 1;
  visibility: visible;
}

.marker.left-edge .tooltip {
  left: 0;
  transform: none;
}

.marker.right-edge .tooltip {
  right: 0;
  left: auto;
  transform: none;
}

.marker.top-edge .tooltip {
  top: calc(100% + 7px);
  bottom: auto;
}

#next-button {
  position: absolute;
  z-index: 3;
  bottom: 8px;
  left: 50%;
  padding: 5px 8px;
  transform: translateX(-50%);
  border: 0;
  color: #fff;
  background: #000a;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: .05em;
}

#next-button:hover,
#next-button:focus-visible {
  background: #000;
}

[hidden] {
  display: none !important;
}

@media (max-width: 700px) {
  .mode-buttons {
    grid-template-columns: 1fr;
  }

  header {
    padding-inline: 10px;
  }

  #image-stage {
    grid-template-columns: 48px minmax(0, 1fr) 48px;
    gap: 4px;
    padding: 8px 4px;
  }

  #image-wrap {
    max-width: calc(100vw - 104px);
    max-height: calc(100dvh - 68px);
  }

  #quiz-image {
    max-height: calc(100dvh - 68px);
  }

  .choice {
    padding-inline: 2px;
    font-size: 14px;
  }

  .choice kbd {
    display: block;
  }

  #status {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}