/* Paleta conservadora */
:root {
  --gris-claro: #F4F4F4;
  --gris-suave: #D9D9D9;
  --gris-oscuro: #4A4A4A;
  --azul: #1A73E8;
  --azul-profundo: #0D47A1;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, sans-serif;
  background: var(--gris-claro);
  color: var(--gris-oscuro);
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2rem;
  background: var(--azul);
  color: white;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.brand h1 {
  margin: 0;
  font-size: 1.6rem;
}

.slogan {
  font-size: 0.85rem;
  color: var(--gris-claro);
  opacity: 0.9;
}

/* Nav */
nav a {
  margin-left: 1rem;
  text-decoration: none;
  color: var(--gris-claro);
  font-weight: 600;
}

/* Hero */
.hero {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--azul-profundo);
  color: var(--gris-claro);
}

.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.7rem 1.4rem;
  background: var(--azul);
  color: white;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
}

/* Sections */
.section {
  padding: 2.5rem 2rem;
  max-width: 900px;
  margin: auto;
}

.section h3 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--azul-profundo);
}

/* Cards */
.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--gris-suave);
  padding: 1.5rem;
  border-radius: 0.6rem;
  text-align: center;
}

/* Contact */
.contact {
  text-align: center;
}

/* Footer */
footer {
  text-align: center;
  padding: 1rem;
  background: var(--azul);
  color: var(--gris-claro);
  margin-top: 2rem;
}

/* Responsive */
@media (max-width: 600px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }
  nav {
    margin-top: 0.5rem;
  }
}