.game-area {
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.cards-row {
  display: flex;
  gap: 6px;
  width: 100%;
}
.cards-row button { flex: 1; }

.tank-wrap {
  width: 260px;
  height: 300px;
}

.tank {
  position: relative;
  width: 260px;
  height: 300px;
  background: #eee;
  border: 3px solid #222;
  border-radius: 6px;
  overflow: hidden;
}

.digit-glyph {
  position: absolute;
  width: 70px;
  height: 100px;
  transform: translate(-50%, -50%);
  z-index: 1;
}
.digit-glyph .seg { fill: #222; }

.notch {
  position: absolute;
  width: 10px;
  height: 3px;
  background: #222;
  z-index: 3;
}
.notch-left { left: 0; margin-top: -1.5px; }
.notch-right { right: 0; margin-top: -1.5px; }

.liquid {
  position: absolute;
  width: 700px;
  height: 700px;
  left: 50%;
  margin-left: -350px;
  top: 165px;
  background: rgba(30, 34, 44, 0.93);
  transform-origin: 50% 0%;
  z-index: 2;
  transition: transform 0.05s linear;
}