.flash{
  display: none;
  justify-content: center;
  align-items: center;
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1000;
}
.flash__content{
  background-color: #ffffff;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  text-align: center;
  max-width: 420px;
  width: calc(100% - 2rem);
  transform: translateY(-100%);
  animation: flash-slide-down 0.5s ease-out forwards;
}
@keyframes flash-slide-down{
  to{ transform: translateY(0); }
}
.flash__content h2{
  color: var(--first-color);
  margin-bottom: 15px;
}
.flash__content p{
  color: #333;
  font-size: 16px;
  margin-bottom: 20px;
}
.flash__error-list{
  text-align: left;
  margin: 15px auto;
  max-width: 90%;
}
.flash__error-list li{
  margin-bottom: 8px;
  color: #d9534f;
}
.flash__progress-bar{
  background-color: #e0e0e0;
  border-radius: 10px;
  overflow: hidden;
  height: 10px;
  margin-top: 20px;
}
.flash__progress{
  background-color: var(--first-color);
  height: 100%;
  width: 0%;
  border-radius: 10px;
  transition: width 1s linear;
}