/* Import font */
@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap");

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body,
html {
  font-family: "Poppins", sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #1f1f2e; /* O singură nuanță elegantă de albastru închis */
  color: #ffffff;
  overflow: hidden;
  position: relative;
}

.container {
  text-align: center;
  width: 90%;
  max-width: 420px;
  padding: 40px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  backdrop-filter: blur(12px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.25);
  animation: fadeIn 0.8s ease-in-out;
  position: relative;
  z-index: 1;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

h1 {
  margin-bottom: 25px;
  font-size: 2.2em;
  font-weight: 600;
  letter-spacing: 3px;
  color: #ffffff;
  text-transform: uppercase;
  text-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

input[type="number"],
button {
  width: 85%;
  padding: 14px;
  margin-top: 15px;
  border: none;
  border-radius: 8px;
  font-size: 1em;
  transition: all 0.3s ease;
  outline: none;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

input[type="number"] {
  background: rgba(255, 255, 255, 0.85);
  color: #333;
}

input[type="number"]:focus {
  background: #ffffff;
  color: #5d5c61;
  transform: scale(1.05);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

button {
  background: linear-gradient(135deg, #6c5ce7, #4b47d0);
  color: #ffffff;
  font-weight: 600;
  letter-spacing: 1.2px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

button:hover,
button:focus {
  background: linear-gradient(135deg, #4834d4, #3c30c0);
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

#output {
  margin-top: 25px;
  font-size: 1.3em;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
  padding: 15px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(10px);
  animation: fadeInOutput 0.6s ease-in-out forwards;
}

@keyframes fadeInOutput {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}