:root {
  --font-system: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --bg: #f8fafc;
  --text: #1f2937;
  --muted: #4b5563;
  --accent: #1d4ed8;
  --accent-dark: #0f172a;
  --nav-bg: #0b1220;
  --nav-link: #e0f2fe;
  --card-bg: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-system);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

nav {
  background: var(--nav-bg);
  color: var(--nav-link);
}

.navbar {
  margin: 0 auto;
  max-width: 1080px;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.logo {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-links a {
  color: var(--nav-link);
  font-weight: 600;
}

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

.lang-menu {
  position: relative;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.1);
  color: var(--nav-link);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.lang-toggle:hover,
.lang-toggle[aria-expanded="true"] {
  background: rgba(255, 255, 255, 0.2);
}

.lang-dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: #0f172a;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.35);
  padding: 8px;
  min-width: 220px;
  max-height: 320px;
  overflow-y: auto;
  z-index: 20;
}

.lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border: none;
  background: transparent;
  color: #e2e8f0;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
}

.lang-option span {
  font-size: 0.75rem;
  font-weight: 500;
  opacity: 0.7;
}

.lang-option:hover,
.lang-option.is-active {
  background: rgba(59, 130, 246, 0.16);
  color: #ffffff;
}

main {
  margin: 0 auto;
  max-width: 1080px;
  padding: 48px 24px 72px;
}

.hero {
  display: grid;
  gap: 18px;
  margin-bottom: 48px;
}

.hero h1 {
  font-size: clamp(2rem, 3vw, 3rem);
  margin: 0;
  color: var(--accent-dark);
}

.hero p {
  max-width: 720px;
  font-size: 1.1rem;
  color: var(--muted);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
}


.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 12px;
  font-weight: 600;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: #153e90;
  border-color: #153e90;
}

.btn-secondary {
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
}

.btn-secondary:hover {
  background: rgba(29, 78, 216, 0.12);
}

.section {
  margin-bottom: 72px;
}

.section h2 {
  margin: 0 0 16px;
  font-size: 1.75rem;
  color: var(--accent-dark);
}

.section p {
  max-width: 780px;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.05);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.card h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  color: var(--accent-dark);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.insight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.insight-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 20px 22px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
}

.insight-card h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
  color: var(--accent-dark);
}

.insight-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.insight-card strong {
  color: var(--accent-dark);
}

.timeline {
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: center;
}

.timeline-year {
  font-weight: 700;
  color: var(--accent);
  font-size: 1.1rem;
}

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

.timeline-item::before {
  content: "";
  grid-column: 1 / -1;
  height: 1px;
  background: rgba(148, 163, 184, 0.25);
}

.contact-card {
  max-width: 640px;
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.08);
}

.contact-card h3 {
  margin-top: 0;
  color: var(--accent-dark);
}

.contact-card p {
  color: var(--muted);
}

.contact-card a {
  font-weight: 600;
}

.footer {
  background: #ffffff;
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.contact-label {
  font-weight: 600;
  margin-right: 6px;
  display: inline-block;
}

@media (max-width: 720px) {
  .navbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .lang-menu {
    width: 100%;
  }

  .lang-dropdown {
    position: static;
    margin-top: 8px;
    width: 100%;
    max-height: 260px;
  }

  main {
    padding: 36px 20px 56px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline-item::before {
    display: none;
  }
}