.promo-box {
  background: #CCFFCC;
  border: 2px solid #ddd;
  border-radius: 12px;
  padding: 20px;
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.headline {
  font-weight: bold;
  font-size: 1.1em;
  margin-bottom: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.arrow {
  font-size: 24px;
  animation: blink 1s infinite;
}

.red {
  color: #FF0050; /* TikTok đỏ */
}

.blue {
  color: #1877F2; /* Facebook xanh */
}

.download {
  font-size: 16px;
  margin-bottom: 15px;
}

.finger {
  color: gold;
  font-size: 20px;
  margin-right: 5px;
}

.cta a {
  display: inline-block;
  padding: 10px 20px;
  background: #FF0050;
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  transition: background 0.3s ease;
}

.cta a:hover {
  background: #e60045;
}

@keyframes blink {
  0%, 50%, 100% { opacity: 1; }
  25%, 75% { opacity: 0; }
}

.no-select {
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}