:root {
  --color-bg: #050816;
  --color-card: #0f172a;
  --color-accent: #22c55e;
  --color-accent-soft: #4ade80;
  --color-text: #e5e7eb;
  --color-muted: #9ca3af;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

body {
  font-family: var(--font-main);
  background: radial-gradient(circle at top, #1f2933 0, #020617 55%);
  color: var(--color-text);
  min-height: 100vh;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 8vw;
  background: rgba(2, 6, 23, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #111827;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 1rem;
}
.logo span {
  color: var(--color-accent);
}

.nav a {
  margin-left: 1rem;
  text-decoration: none;
  color: #cbd5f5;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}
.nav a:hover {
  color: var(--color-accent);
}

.btn-nav {
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--color-accent);
}

main {
  padding: 3rem 8vw 4rem;
}

.page-header {
  max-width: 720px;
  margin: 0 auto 2.5rem;
  text-align: center;
}
.page-header h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 0.7rem;
}
.page-header p {
  color: var(--color-muted);
  font-size: 0.98rem;
}

.footer {
  border-top: 1px solid #1f2937;
  padding: 1.5rem 8vw;
  font-size: 0.8rem;
  color: #9ca3af;
  text-align: center;
}

/* Utilidades genéricas */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  border: 1px solid #1f2937;
  background: rgba(15, 23, 42, 0.9);
  color: var(--color-muted);
  font-size: 0.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.3fr);
  gap: 2.5rem;
  align-items: flex-start;
}

.card {
  background: var(--color-card);
  border-radius: 1.5rem;
  padding: 1.5rem;
  border: 1px solid #1f2937;
}

/* Responsive */

@media (max-width: 900px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
  }
  .nav a {
    margin-left: 0;
    margin-right: 0.8rem;
  }
}

@media (max-width: 640px) {
  main {
    padding: 2.2rem 5vw 3rem;
  }
}