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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.container {
  background: white;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  padding: 40px;
  max-width: 600px;
  width: 100%;
  text-align: center;
}

h1 {
  color: #333;
  margin-bottom: 30px;
  font-size: 2.5em;
  font-weight: 300;
}

.input-group {
  margin-bottom: 25px;
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  align-items: center;
  justify-content: center;
}

#text {
  flex: 1;
  min-width: 250px;
  padding: 15px 20px;
  border: 2px solid #e1e8ed;
  border-radius: 25px;
  font-size: 16px;
  outline: none;
  transition: border-color 0.3s ease;
}

#text:focus {
  border-color: #4a5568;
}

#color {
  width: 60px;
  height: 50px;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  outline: none;
}

#download {
  background: linear-gradient(45deg, #4a5568, #2d3748);
  color: white;
  border: none;
  padding: 15px 25px;
  border-radius: 25px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#download:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.qr-container {
  margin: 30px 0;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #f8f9fa;
  border-radius: 15px;
  padding: 20px;
  overflow: visible;
}

#qrcode {
  display: flex;
  justify-content: center;
  align-items: center;
}

#qrcode svg {
  max-width: 100%;
  max-height: none;
  width: auto;
  height: auto;
  border-radius: 10px;
  background: white;
  padding: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  display: block;
}

.footer {
  margin-top: 20px;
  color: #666;
  font-size: 14px;
}

.footer-credits {
  margin-top: 10px;
  font-size: 12px;
  color: #999;
}

.footer-credits a {
  color: #667;
  text-decoration: none;
}

.source-link {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

@media (max-width: 480px) {
  .container {
    padding: 25px;
    margin: 10px;
  }

  h1 {
    font-size: 2em;
    margin-bottom: 20px;
  }

  .input-group {
    flex-direction: column;
  }

  #text {
    min-width: 100%;
  }
}