.ss-html5-game {
  width: min(760px, 96vw);
  margin: 12px auto;
  background: #f8fbff;
  border: 1px solid #b8d6ef;
  border-radius: 6px;
  color: #203040;
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
  overflow: hidden;
}

.ss-html5-game * {
  box-sizing: border-box;
}

.ss-game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  background: #1f7bb8;
  color: #fff;
  font-weight: bold;
}

.ss-game-status {
  font-size: 14px;
  font-weight: normal;
}

.ss-game-body {
  padding: 14px;
}

.ss-game-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0;
}

.ss-game-btn,
.ss-card-btn,
.ss-letter-tile {
  border: 1px solid #72a8cc;
  background: #fff;
  color: #164c70;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bold;
}

.ss-game-btn {
  min-width: 92px;
  padding: 8px 12px;
}

.ss-game-btn:hover,
.ss-card-btn:hover,
.ss-letter-tile:hover {
  background: #e8f5ff;
}

.ss-learning-stage {
  display: grid;
  grid-template-columns: minmax(180px, 260px) 1fr;
  gap: 14px;
  align-items: stretch;
}

.ss-big-letter {
  display: grid;
  place-items: center;
  min-height: 240px;
  border: 2px solid #8ec2e5;
  border-radius: 6px;
  background: linear-gradient(#ffffff, #e9f7ff);
  font-size: 168px;
  line-height: 1;
  font-weight: bold;
  color: #126aa0;
}

.ss-word-panel {
  min-height: 240px;
  border: 1px solid #c8dce9;
  border-radius: 6px;
  background: #fff;
  padding: 18px;
  text-align: center;
}

.ss-word-panel .ss-word {
  font-size: 42px;
  color: #283f55;
  font-weight: bold;
  margin: 12px 0 8px;
}

.ss-word-panel .ss-clue {
  font-size: 18px;
  color: #5b6c78;
}

.ss-letter-grid {
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  gap: 5px;
  margin-top: 12px;
}

.ss-letter-tile {
  min-height: 34px;
  font-size: 18px;
}

.ss-match-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.ss-match-column {
  display: grid;
  gap: 8px;
}

.ss-card-btn {
  min-height: 46px;
  padding: 8px 10px;
  font-size: 20px;
}

.ss-card-btn.ss-selected {
  background: #fff3a8;
  border-color: #d39b1f;
}

.ss-card-btn.ss-matched {
  background: #dff4dc;
  border-color: #55a653;
  color: #2d6d2d;
  cursor: default;
}

.ss-dot-stage {
  display: grid;
  place-items: center;
}

.ss-dot-canvas {
  width: min(720px, 92vw);
  height: auto;
  border: 1px solid #b9c9d5;
  border-radius: 6px;
  background: #f7fbff;
  touch-action: none;
}

.ss-message {
  min-height: 24px;
  text-align: center;
  font-size: 16px;
  color: #244b67;
  font-weight: bold;
}

@media (max-width: 680px) {
  .ss-learning-stage,
  .ss-match-columns {
    grid-template-columns: 1fr;
  }

  .ss-letter-grid {
    grid-template-columns: repeat(7, 1fr);
  }

  .ss-big-letter {
    min-height: 160px;
    font-size: 112px;
  }
}