/* --- Typography & Colors --- */
:root {
  --bg-color: #0c0c0f;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #52525b;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 680px;
}

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

html {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.62;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem 1.5rem;
  flex: 1;
}

/* --- Header / Navigation --- */
header {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 4rem;
}

.lang-nav {
  display: flex;
  gap: 1.5rem;
}

.lang-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.5rem 0;
  transition: color 0.15s ease;
}

.lang-link:hover {
  color: var(--text-primary);
}

.lang-link.active {
  color: var(--text-primary);
  border-bottom: 2px solid var(--text-primary);
}

/* --- Content Typography --- */
main {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

h1 {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.lead-text {
  font-size: 1.15rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.seo-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.seo-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 1rem;
}

.seo-content p {
  color: var(--text-secondary);
  font-size: 1rem;
}



/* --- Footer --- */
footer {
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 2.5rem 1.5rem;
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text-secondary);
}