/* Session Timer & Join Button */
.session-countdown {
  font-size: 1.2rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 8px;
  display: inline-block;
  transition: background-color 0.5s ease, color 0.5s ease;
}

.session-countdown.timer-normal {
  background-color: #d4edda;
  color: #155724;
}

.session-countdown.timer-warning {
  background-color: #f8d7da;
  color: #721c24;
  animation: pulse-red 1s ease-in-out infinite;
}

.session-countdown.timer-ended {
  background-color: #e2e3e5;
  color: #6c757d;
  animation: none;
}

@keyframes pulse-red {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(1.03); }
}

.session-join-btn {
  transition: all 0.3s ease;
}

.session-join-btn.btn-rejoin {
  background-color: #e67e22;
  border-color: #e67e22;
}

.session-join-btn.btn-rejoin:hover {
  background-color: #d35400;
  border-color: #d35400;
}