style.css

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  font-family: 'Roboto', sans-serif;
}

html,
body {
  height: 100%;
  background-color: #f0f2f5;
  color: #333;
}

body {
  padding: 16px 32px;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

h1 {
  font-size: 2.5rem;
  color: #4A90E2;
}

h4 {
  font-size: 1.2rem;
  color: #7F8C8D;
  margin-top: 0.5rem;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#container {
  position: relative;
  width: 720px;
  height: 480px;
  max-width: 100%;
  max-height: 100%;
  border: 2px dashed #D1D5DB;
  border-radius: 0.75rem;
  overflow: hidden;
  margin-top: 1rem;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: background 0.3s ease-in-out;
}

#upload-button {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  font-size: 18px;
  color: #4A90E2;
  cursor: pointer;
  padding: 1rem;
  border: 2px solid #4A90E2;
  border-radius: 0.75rem;
  background-color: #fff;
  transition: background-color 0.3s ease-in-out, color 0.3s ease-in-out;
}

#upload-button:hover {
  background-color: #4A90E2;
  color: #fff;
}

#upload {
  display: none;
}

svg {
  pointer-events: none;
}

#example {
  font-size: 14px;
  text-decoration: underline;
  cursor: pointer;
  color: #4A90E2;
}

#example:hover {
  color: #2563EB;
}

canvas {
  position: absolute;
  width: 100%;
  height: 100%;
}

#status {
  min-height: 16px;
  margin: 8px 0;
  font-size: 1rem;
  color: #4A90E2;
}

#download-button {
  padding: 10px 20px;
  font-size: 16px;
  color: white;
  background-color: #4A90E2;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  margin-top: 1rem;
  transition: background-color 0.3s ease-in-out;
}

#download-button:hover {
  background-color: #2563EB;
}