:root {
  --kazocra-lesson-player-width: 440px;
}

.kazocra-lesson-launcher {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 10050;
  min-height: 48px;
  padding: 0 18px;
  border: 3px solid #16394d;
  border-radius: 999px;
  background: #ffd447;
  color: #16394d;
  box-shadow: 0 5px 0 #b88900, 0 10px 24px rgba(0, 0, 0, 0.22);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
}

.kazocra-lesson-launcher:hover,
.kazocra-lesson-launcher:focus-visible {
  transform: translateY(-2px);
  outline: 3px solid #fff;
  outline-offset: 2px;
}

.kazocra-lesson-player {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 10050;
  display: none;
  width: min(var(--kazocra-lesson-player-width), calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  overflow: hidden;
  border: 3px solid #16394d;
  border-radius: 14px;
  background: #f8fbff;
  color: #16394d;
  box-shadow: 0 8px 0 rgba(22, 57, 77, 0.28), 0 18px 40px rgba(0, 0, 0, 0.3);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
}

.kazocra-lesson-player.is-open {
  display: block;
}

.kazocra-lesson-player__header {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 7px 8px 7px 52px;
  border-bottom: 3px solid #16394d;
  background: #ffd447;
}

.kazocra-lesson-player__title {
  min-width: 0;
  flex: 1;
  overflow: hidden;
  font-size: 14px;
  font-weight: 900;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kazocra-lesson-player__minimize {
  flex: 0 0 auto;
  width: 36px;
  height: 32px;
  border: 2px solid #16394d;
  border-radius: 8px;
  background: #fff;
  color: #16394d;
  font-size: 20px;
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
}

.kazocra-lesson-player__toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: #e9f6ef;
}

.kazocra-lesson-player__select {
  min-width: 0;
  min-height: 36px;
  flex: 1;
  padding: 5px 8px;
  border: 2px solid #168b5d;
  border-radius: 8px;
  background: #fff;
  color: #16394d;
  font: inherit;
  font-size: 13px;
  font-weight: 800;
}

.kazocra-lesson-player__sizes {
  display: flex;
  gap: 4px;
}

.kazocra-lesson-player__size {
  min-width: 34px;
  min-height: 34px;
  padding: 0 7px;
  border: 2px solid #1876c8;
  border-radius: 8px;
  background: #fff;
  color: #16394d;
  font-size: 12px;
  font-weight: 900;
  cursor: pointer;
}

.kazocra-lesson-player__size:hover,
.kazocra-lesson-player__size:focus-visible,
.kazocra-lesson-player__minimize:hover,
.kazocra-lesson-player__minimize:focus-visible {
  background: #e5f2ff;
  outline: 2px solid #fff;
  outline-offset: -4px;
}

.kazocra-lesson-player__video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #071821;
}

.kazocra-lesson-player__video {
  display: block;
  width: 100%;
  height: 100%;
  background: #071821;
  object-fit: contain;
}

.kazocra-lesson-player__footer {
  min-height: 36px;
  padding: 8px 11px;
  background: #fff;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.kazocra-lesson-player__back {
  flex: 0 0 auto;
  color: #087f53;
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.kazocra-lesson-player__back:hover,
.kazocra-lesson-player__back:focus-visible {
  color: #d93643;
}

@media (max-width: 520px) {
  .kazocra-lesson-player__footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }
}

.kazocra-lesson-player__resize {
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 40px;
  border: 0;
  border-right: 3px solid #16394d;
  border-bottom: 3px solid #16394d;
  border-radius: 10px 0 12px;
  background: #ffd447;
  color: #16394d;
  font-size: 22px;
  font-weight: 900;
  line-height: 1;
  cursor: nwse-resize;
  touch-action: none;
}

.kazocra-lesson-player__resize:focus-visible {
  outline: 3px solid #1876c8;
  outline-offset: -5px;
}

@media (max-height: 620px) {
  .kazocra-lesson-player__header {
    min-height: 40px;
  }

  .kazocra-lesson-player__toolbar {
    padding-block: 5px;
  }

  .kazocra-lesson-player__footer {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kazocra-lesson-launcher:hover,
  .kazocra-lesson-launcher:focus-visible {
    transform: none;
  }
}