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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #eef2f3;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  background: white;
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

h1 {
  font-size: 28px;
  margin-bottom: 8px;
  color: #2c3e50;
}

.sub {
  color: #7f8c8d;
  margin-bottom: 32px;
  font-size: 14px;
}

.form-group {
  margin-bottom: 24px;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 16px;
  color: #2c3e50;
}

input,
select {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  border: 1px solid #ddd;
  border-radius: 12px;
  font-family: inherit;
}

input[type="file"] {
  padding: 10px;
  background: #f8f9fa;
}

button[type="submit"] {
  background: #27ae60;
  color: white;
  border: none;
  padding: 16px 24px;
  font-size: 18px;
  font-weight: bold;
  border-radius: 12px;
  cursor: pointer;
  width: 100%;
}

button[type="submit"]:active {
  background: #219a52;
}

.result {
  margin-top: 24px;
  padding: 20px;
  background: #f0f9ff;
  border-radius: 16px;
  display: none;
}

.result h3 {
  margin-bottom: 12px;
  font-size: 18px;
}

.qr-code {
  text-align: center;
  margin: 16px 0;
}

.qr-code img {
  max-width: 200px;
  border: 2px solid #ddd;
  border-radius: 12px;
  padding: 8px;
  background: white;
}

.links {
  word-break: break-all;
  background: white;
  padding: 12px;
  border-radius: 12px;
  font-family: monospace;
  font-size: 14px;
  margin: 12px 0;
}

.download-btn {
  background: #3498db;
  margin-top: 12px;
  color: white;
  border: none;
  padding: 14px 20px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  width: 100%;
}

.download-btn--secondary {
  background: #e67e22;
}

.error {
  background: #fee;
  color: #c0392b;
  padding: 12px;
  border-radius: 12px;
  margin-top: 16px;
  display: none;
}

.back-link {
  display: inline-block;
  margin-bottom: 16px;
  color: #3498db;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.back-link:hover {
  text-decoration: underline;
}