body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin: 0;

  color-scheme: light dark;

  background-color: #ffffff;
  color: #000000;

  --canvas-bg-color: #f0f0f0;

  @media (prefers-color-scheme: dark) {
    background-color: #121212;
    color: #ffffff;

    --canvas-bg-color: #1e1e1e;
  }
}

.app-container {
  display: flex;
  flex-direction: column;
  padding: 40px;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  box-sizing: border-box;
}

h1 {
  font-family: "Arial Black", Arial, sans-serif;
  font-weight: 900;
  font-size: 48px;
  font-style: italic;
  margin: 0;
  margin-bottom: 40px;
}

input[type="file"] {
  display: none;
}

#file-label,
button,
#download-button {
  font-family: "Arial Black", Arial, sans-serif;
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: 40px;
  padding: 20px 40px;
  font-size: 32px;
  cursor: pointer;
  border: none;
  background-color: #d32f2f;
  color: white;
  box-shadow: 0 10px #b71c1c;
  transition: all 0.1s ease-in-out;
  text-decoration: none;
  display: block;
}

#file-label {
  background-color: #1976d2;
  box-shadow: 0 10px #0d47a1;
}

#download-button {
  background-color: #388e3c;
  box-shadow: 0 10px #1b5e20;
}

button:active {
  box-shadow: 0 0px #b71c1c;
  transform: translateY(10px);
}

#file-label:active {
  box-shadow: 0 0px #0d47a1;
  transform: translateY(10px);
}

#download-button:active {
  box-shadow: 0 0px #1b5e20;
  transform: translateY(10px);
}

#file-label:disabled,
button:disabled,
#download-button:disabled {
  background-color: #9e9e9e;
  box-shadow: 0 10px #7e7e7e;
  cursor: not-allowed;
  transform: none;
}

canvas {
  background-color: var(--canvas-bg-color);
  max-width: 100%;
  max-height: 100%;
  width: 400px;
  object-fit: contain;
  margin-bottom: 40px;
  aspect-ratio: 1 / 1;
}