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

body {
 font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
 line-height: 1.6;
 color: #333;
 background-color: #f9f9f9;
 padding: 0;
 margin: 0;
}

header {
 background-color: #fff;
 border-bottom: 1px solid #ddd;
 padding: 1.5rem 2rem;
 margin-bottom: 2rem;
}

header nav {
 max-width: 1200px;
 margin: 0 auto;
 display: flex;
 justify-content: space-between;
 align-items: center;
}

header nav .logo {
 font-size: 1.25rem;
 font-weight: 600;
 color: #333;
 text-decoration: none;
}

header nav .nav-links {
 display: flex;
 gap: 1.5rem;
 list-style: none;
}

header nav .nav-links a {
 color: #555;
 text-decoration: none;
 font-size: 0.95rem;
}

header nav .nav-links a:hover {
  color: #000;
}

header nav .lang-selector {
  display: flex;
  gap: 0.5rem;
}

header nav .lang-selector button {
  background: none;
  border: 1px solid #ddd;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  font-size: 0.85rem;
  color: #555;
  border-radius: 3px;
}

header nav .lang-selector button.active {
  background-color: #333;
  color: #fff;
  border-color: #333;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

h1 {
  font-size: 2.5rem;
  font-weight: 600;
  color: #222;
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.75rem;
  font-weight: 500;
  color: #333;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.25rem;
  font-weight: 500;
  color: #444;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
  color: #555;
}

.subtitle {
  font-size: 1.25rem;
  color: #666;
  margin-bottom: 2rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: #333;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn:hover {
  background-color: #555;
}

.btn-secondary {
  background-color: #fff;
  color: #333;
  border: 1px solid #ddd;
}

.btn-secondary:hover {
  background-color: #f5f5f5;
}

.three-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.column {
  background-color: #fff;
  padding: 1.5rem;
  border-radius: 4px;
  border: 1px solid #e5e5e5;
}

.column h3 {
  margin-top: 0;
  font-size: 1.1rem;
}

.column p {
  font-size: 0.95rem;
  color: #666;
}

.intro-text {
  font-size: 1.1rem;
  color: #555;
  margin: 2rem 0;
  line-height: 1.7;
}

.file-input-wrapper {
  margin: 2rem 0;
}

.file-input-wrapper label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: #333;
}

.file-input-wrapper input[type="file"] {
  display: block;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  width: 100%;
  max-width: 500px;
}

.helper-text {
  font-size: 0.85rem;
  color: #777;
  margin-top: 0.25rem;
}

.status-box {
  margin: 2rem 0;
  padding: 2rem;
  border-radius: 4px;
  border: 2px solid;
  text-align: center;
}

.status-box.green {
  background-color: #f0fdf4;
  border-color: #22c55e;
}

.status-box.yellow {
  background-color: #fefce8;
  border-color: #eab308;
}

.status-box.red {
  background-color: #fef2f2;
  border-color: #ef4444;
}

.status-box h2 {
  margin: 0 0 1rem 0;
}

.status-box.green h2 {
  color: #16a34a;
}

.status-box.yellow h2 {
  color: #ca8a04;
}

.status-box.red h2 {
  color: #dc2626;
}

.status-box p {
  margin: 0.5rem 0;
  color: #555;
}

.details-box {
  margin: 2rem 0;
  padding: 1.5rem;
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.details-box h3 {
  margin-top: 0;
}

.details-box ul {
  list-style: none;
  padding: 0;
}

.details-box li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #f0f0f0;
}

.details-box li:last-child {
  border-bottom: none;
}

.step-container {
  margin: 2rem 0;
  padding: 2rem;
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.step-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: #333;
}

.form-group input[type="text"],
.form-group input[type="date"],
.form-group select,
.form-group textarea {
  width: 100%;
  max-width: 600px;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.ptc-output {
  margin: 2rem 0;
  padding: 1.5rem;
  background-color: #f5f5f5;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-family: "Courier New", monospace;
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.highlight-message {
  font-size: 1.1rem;
  font-weight: 500;
  color: #333;
  margin: 1rem 0;
}

.faq-item {
  margin: 2rem 0;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #e5e5e5;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  margin-top: 0;
  color: #333;
}

.faq-item p {
  color: #666;
}

footer {
  background-color: #fff;
  border-top: 1px solid #ddd;
  padding: 2rem;
  margin-top: 4rem;
  text-align: center;
}

.footer-note {
  font-size: 0.85rem;
  color: #777;
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

.idle-message {
  padding: 2rem;
  text-align: center;
  color: #999;
  font-style: italic;
}

.processing-message {
  padding: 2rem;
  text-align: center;
  color: #666;
}

ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

ul li {
  margin-bottom: 0.5rem;
  color: #555;
}

.optional-section {
  margin-top: 1rem;
  padding: 1rem;
  background-color: #fafafa;
  border: 1px solid #e5e5e5;
  border-radius: 4px;
}

.optional-section summary {
  cursor: pointer;
  font-weight: 500;
  color: #555;
}

.transition-text {
  margin: 1.5rem 0;
  font-size: 1rem;
  color: #666;
  font-style: italic;
}

.warning-text {
  color: #ca8a04;
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

.boxed-note {
  padding: 1.5rem;
  background-color: #f0f9ff;
  border: 1px solid #bae6fd;
  border-radius: 4px;
  margin: 2rem 0;
}

.boxed-note p {
  margin: 0;
}

.closing-text {
  font-size: 1.1rem;
  font-style: italic;
  color: #555;
  margin: 2rem 0;
  text-align: center;
}

@media (max-width: 768px) {
  header nav {
    flex-direction: column;
    gap: 1rem;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .three-columns {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }
}