:root {
  --bg: #0b0f14;
  --card: #0f1722;
  --text: #e6edf3;
  --muted: #9fb0c0;
  --line: rgba(255, 255, 255, .08);
  --radius: 14px;
  --container: 1100px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% 0%, rgba(79, 70, 229, .25), transparent 60%),
    radial-gradient(900px 500px at 80% 20%, rgba(16, 185, 129, .18), transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(11, 15, 20, .7);
  border-bottom: 1px solid var(--line);
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.brand {
  font-weight: 650;
  letter-spacing: .2px;
  white-space: nowrap;
}

.nav-list {
  display: flex;
  gap: 14px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-link {
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--muted);
  text-decoration: none;
}

.nav-link:hover {
  background: rgba(255, 255, 255, .06);
  color: var(--text);
  text-decoration: none;
}

.nav-link.is-active {
  background: rgba(255, 255, 255, .08);
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-switch {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  text-decoration: none;
}

.lang-switch:hover {
  color: var(--text);
  text-decoration: none;
}

.cta {
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, .10);
  border: 1px solid rgba(255, 255, 255, .14);
  text-decoration: none;
}

.cta:hover {
  background: rgba(255, 255, 255, .14);
  text-decoration: none;
}

.main {
  padding: 40px 20px 70px;
}

.card {
  background: rgba(15, 23, 34, .72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  /* später: Mobile Menu */
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0;
  color: var(--muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.footer-links a {
  color: var(--muted);
  margin-left: 14px;
}

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

.muted {
  color: var(--muted);
}