* {
  box-sizing: border-box;
}

body {
  font-family: "Poppins", sans-serif;
  background: #0d1117;
  color: #e6edf3;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  text-align: center;
  width: 95%;
  max-width: 420px;
  background: #161b22;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

h1 {
  font-size: 1.4em;
  margin-bottom: 10px;
}

#scanner {
  width: 100%;
  aspect-ratio: 1 / 1;
  margin-top: 10px;
  border-radius: 10px;
  overflow: hidden;
}

.message {
  margin-top: 15px;
  font-size: 1em;
  padding: 10px;
  border-radius: 10px;
  background: #21262d;
  transition: background 0.3s;
  min-height: 45px;
}

.settings {
  margin-top: 15px;
  display: flex;
  gap: 10px;
  justify-content: center;
}

input {
  padding: 8px;
  border-radius: 8px;
  border: none;
  width: 60%;
}

button {
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  background: #238636;
  color: white;
  cursor: pointer;
}

button:hover {
  background: #2ea043;
}

.controls {
  margin-top: 10px;
}

@media (max-width: 600px) {
  .container {
    width: 95%;
    padding: 15px;
  }

  h1 {
    font-size: 1.2em;
  }

  #scanner {
    aspect-ratio: 1 / 1;
  }
}

/* Popup animation */
#popup {
  position: fixed;
  bottom: -60px;
  left: 50%;
  transform: translateX(-50%);
  background: #238636;
  color: white;
  padding: 10px 20px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  font-weight: 500;
  transition: all 0.5s ease;
  opacity: 0;
}

#popup.show {
  bottom: 40px;
  opacity: 1;
}