:root {
  --color-principal: #4a6fa5;
  --color-secundario: #f9f9f9;
  --color-texto: #333333;
  --color-menu: #e4e8ef;
  --color-hover: #bfc9dd;
  --color-header: #f1f3f5;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

body {
  background: var(--color-secundario);
  margin: 0;
  font-family: "Nunito", sans-serif;
}

.banner {
  width: 100%;
  padding: 2em 0;
  background: linear-gradient(110deg, #ffffffaa 20%, #bdd1e6aa 100%), url('#') center/cover no-repeat;
  text-align: center;
  color: var(--color-texto);
  margin-bottom: 2em;
}

.banner h2 {
  color: var(--color-principal);
  font-weight: 600;
  font-size: 3em;
  margin: 0 0 0.3em 0;
}

.banner p {
  font-size: 1.1em;
  color: #5a627a;
  margin: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.docs-title {
  background: var(--color-principal);
  color: #fff;
  text-align: center;
  font-size: 1.65em;
  font-weight: 600;
  border-radius: 8px;
  margin-bottom: 2.2em;
  padding: 0.7em 0;
  letter-spacing: 0.5px;
}

.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 2em;
  justify-items: center;
}

.doc-card {
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 2em 1em 1.2em 1em;
  text-align: center;
  text-decoration: none;
  color: var(--color-texto);
  transition: box-shadow .18s, transform .12s;
  min-width: 230px;
  max-width: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.doc-card:hover {
  box-shadow: 0 8px 28px rgba(50,110,180,0.16);
  transform: translateY(-6px) scale(1.03);
}

.doc-card img {
  width: 110px;
  height: 110px;
  object-fit: contain;
  margin-bottom: 1.3em;
}

.doc-title {
  font-size: 1.07em;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #2f3a5a;
  margin-top: 0.7em;
}

/* Responsive */
@media (max-width: 800px) {
  .docs-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.2em;
  }
}

@media (max-width: 480px) {
  .docs-title {
    font-size: 1.09em;
    padding: 0.5em 0;
  }
  .docs-grid {
    grid-template-columns: 1fr;
    gap: 0.7em;
  }
  .doc-card img {
    width: 74px;
    height: 74px;
  }
}