* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, Arial, sans-serif;
}

.app {
  padding: 20px;
}

:root {
  --gap: 12px;
}

/* CENTRADO PERFECTO */
.full {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
}

.card {
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 12px;
  background: #f9f9f9;
}

/* NAVBAR */
.nav {
  display: flex;
  align-items: center;
  gap: var(--gap);
  padding: 12px;
  border-bottom: 1px solid #eee;
}

.menu {
  display: flex;
  gap: var(--gap);
  justify-content: center;
  flex: 1;
}

.cta {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid #ddd;
  background: #fff;
}

/* CARDS FLEX */
.cards {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap);
  margin-bottom: 40px;
}

.cards .card {
  flex: 1 1 200px;
  text-align: center;
}

/* GRID 3 */
.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
  margin-bottom: 40px;
}

.grid3 > * {
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 10px;
  text-align: center;
}

/* GRID AUTO FIT */
.auto {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-bottom: 40px;
}

/* GALERIA */
.galeria {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  margin-bottom: 40px;
}

.galeria img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 12px;
}

/* RESPONSIVE */
.mf {
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .mf {
    grid-template-columns: repeat(3, 1fr);
  }
}