/* ============================================================
   SAMA FORWARDING — Base / Reset + componentes base (Módulo 1)
   Botones, cards, grillas, contenedores reutilizables.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-base);
  font-weight: var(--fw-regular);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-texto);
  background: var(--color-blanco);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: var(--lh-tight); font-weight: var(--fw-bold); }
h1 { font-size: var(--fs-h1); font-weight: var(--fw-black); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); font-weight: var(--fw-semibold); }

a { color: var(--color-azul-profundo); text-underline-offset: 3px; }
img { max-width: 100%; display: block; }

/* ---- Layout helpers ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}
.section { padding-block: var(--space-7); }
.section--soft { background: var(--color-azul-claro); }

.grid { display: grid; gap: var(--space-4); }
@media (min-width: 640px)  { .grid-2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px)  { .grid-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 900px)  { .grid-4 { grid-template-columns: repeat(4, 1fr); } }

/* ---- Botones (4 estados: normal, hover, loading, disabled) ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: inherit; font-weight: var(--fw-semibold); font-size: var(--fs-body);
  padding: .85rem 1.6rem; border-radius: var(--radius); border: 2px solid transparent;
  cursor: pointer; text-decoration: none; transition: background var(--t-base), color var(--t-base), border-color var(--t-base);
}
.btn--primary { background: var(--color-azul-sama); color: var(--color-blanco); }
.btn--primary:hover { background: var(--color-azul-profundo); }
.btn--secondary { background: transparent; color: var(--color-azul-profundo); border-color: var(--color-azul-profundo); }
.btn--secondary:hover { background: var(--color-azul-profundo); color: var(--color-blanco); }
.btn--block { width: 100%; }
.btn[disabled], .btn.is-loading { opacity: .6; cursor: not-allowed; pointer-events: none; }
.btn.is-loading::after {
  content: ""; width: 1em; height: 1em; border: 2px solid currentColor;
  border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite;
}
.btn.is-error { background: #d64545; border-color: #d64545; color: var(--color-blanco); }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Foco accesible (contraste AA) en todos los interactivos ---- */
a:focus-visible, button:focus-visible, .btn:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible,
summary:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--color-azul-sama);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---- Cards ---- */
.card {
  background: var(--color-blanco); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card); padding: var(--space-4);
}
.card--core { border-top: 6px solid var(--color-azul-sama); }

/* ---- Tipografía utilidades ---- */
.label {
  display: inline-block; text-transform: uppercase; letter-spacing: .08em;
  font-size: var(--fs-small); font-weight: var(--fw-semibold); color: var(--color-azul-sama);
}
.text-muted { color: var(--color-texto-muted); }
.lead { font-size: 1.15rem; }