* {
  box-sizing: border-box;
  user-select: none;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #0e0e0e;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: #fff;
  display: flex;
  justify-content: center;
}

.app {
  width: 360px;
  padding-top: 20px;
  text-align: center;
}

.title {
  font-size: 26px;
  margin-bottom: 10px;
}

.section h2 {
  margin: 10px 0 6px;
  font-size: 16px;
  color: #ffcc66;
}

.cards {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.card {
  width: 72px;
  height: 110px;
  border-radius: 12px;
  border: 2px solid #f5c542;
  background: #111;
  font-size: 26px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card.dealer {
  border-color: #ff6b6b;
  color: #ff6b6b;
}

.vs {
  margin: 12px 0;
  font-size: 18px;
  font-weight: 900;
  color: #aaa;
}

#playBtn {
  margin-top: 16px;
  padding: 14px 36px;
  font-size: 20px;
  font-weight: 900;
  border-radius: 40px;
  border: none;
  cursor: pointer;
  background: linear-gradient(135deg, #ffb703, #fb8500);
  color: #000;
}

#playBtn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.result {
  margin-top: 18px;
  font-size: 18px;
  font-weight: 800;
}

.hidden {
  display: none;
}