:root {
  --max-width: 800px;
  --text-color: #111;
  --link-color: #00c;
  --link-visited: #66c;
  --border-light: #ccc;
  --bg-light: #f9f9f9;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-color);
  background: #fff;
}

header {
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-light);
}

.navbar {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.75rem 1rem;
}

.logo img {
  height: 36px;
  display: block;
}

.nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-links a {
  color: var(--link-color);
  text-decoration: none;
  font-size: 0.95rem;
  font-family: inherit;
}

.nav-links a:hover {
  text-decoration: underline;
  color: var(--link-visited);
}

.lang-switch {
  margin-left: auto;
}

.lang-switch a {
  color: #666;
  text-decoration: none;
  font-size: 0.9rem;
  font-family: inherit;
}

.lang-switch a:hover {
  color: var(--link-color);
  text-decoration: underline;
}

main {
  max-width: var(--max-width);
  margin: 2rem auto;
  padding: 0 1rem;
}

main p {
  max-width: 100%;
  overflow-wrap: break-word;
  word-wrap: break-word;
  white-space: normal;
  margin-bottom: 1em;
}

.welcome h1 {
  font-family: inherit;
  font-weight: 600;
  font-size: 1.8rem;
  margin: 0 0 0.5rem 0;
  color: #000;
}

.welcome p {
  margin: 0 0 1rem 0;
  color: #333;
  font-family: inherit;
}

.about-short h2 {
  font-family: inherit;
  font-weight: 600;
  font-size: 1.2rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px dotted var(--border-light);
  padding-bottom: 0.25rem;
}

footer {
  max-width: var(--max-width);
  margin: 3rem auto 1.5rem;
  padding: 1rem 1rem 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border-light);
  color: #555;
  font-size: 0.9rem;
  font-family: inherit;
}

@media (max-width: 640px) {
  .navbar {
    flex-wrap: wrap;
    gap: 0.75rem;
    padding: 0.75rem;
  }
  .nav-links {
    flex-wrap: wrap;
    gap: 1rem;
  }
  .nav-links a {
    padding: 0.5rem 0;
    display: inline-block;
  }
  .lang-switch {
    margin-left: 0;
    width: 100%;
    text-align: left;
    padding-top: 0.25rem;
  }
  .welcome h1 {
    font-size: 1.5rem;
  }
  main {
    margin: 1.5rem auto;
    padding: 0 1.25rem;
  }
  footer {
    padding: 1rem;
  }
}