body {
  font-family: Arial, sans-serif;
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #ffffff;
  color: #000000;
}

.upload-card {
  width: min(90%, 420px);
  background: #ffffff;
  border-radius: 16px;
  padding: 32px 28px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: center;
}

.upload-card h1 {
  font-size: 1.4rem;
  margin: 0;
}

input[type="file"],
button {
  width: 100%;
}

button {
  padding: 12px;
  border-radius: 8px;
  border: none;
  background: #000000;
  color: #ffffff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease-in-out;
}

button:disabled {
  background: #ffffff;
  color: #000000;
  border: 1px solid #000000;
}

button:not(:disabled):hover {
  background: #ffffff;
  color: #000000;
}

#progressContainer {
  width: 100%;
  background: #ffffff;
  height: 14px;
  border: 1px solid #000000;
}

#progressBar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #000000, #ffffff);
  border-radius: 999px;
  transition: width 0.2s ease-out;
}

#status,
#downloadURL {
  min-height: 24px;
  margin: 0;
}

#status {
  font-weight: 600;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}