/* ============================================================
   BASE.CSS — Estilos generales, tipografía y utilidades
   ============================================================ */

/* --- BODY Y TIPOGRAFÍA BASE --- */
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.65;
}

/* --- JERARQUÍA TIPOGRÁFICA --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  line-height: 1.2;
  color: var(--color-gray-900);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl);  }
h4 { font-size: var(--text-lg);  }

p {
  color: var(--color-text);
  line-height: 1.7;
}

strong {
  font-weight: var(--weight-semibold);
  color: var(--color-gray-900);
}

/* --- CONTENEDOR PRINCIPAL --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* --- SECCIÓN BASE --- */
.section {
  padding-block: var(--space-20);
}

.section--alt {
  background-color: var(--color-gray-50);
}

.section--primary {
  background-color: var(--color-primary-bg);
}

/* --- ENCABEZADO DE SECCIÓN --- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  border: 1px solid hsl(200, 80%, 80%);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  color: var(--color-gray-900);
}

.section-subtitle {
  font-size: var(--text-md);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-inline: auto;
  line-height: 1.65;
}

/* --- BOTONES --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: 1;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--transition-base),
    color            var(--transition-base),
    border-color     var(--transition-base),
    transform        var(--transition-fast),
    box-shadow       var(--transition-base);
  white-space: nowrap;
  user-select: none;
}

.btn:active {
  transform: scale(0.97);
}

/* Primario */
.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-primary);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-primary-dark);
  box-shadow: 0 8px 28px hsl(200 80% 38% / 0.40);
  transform: translateY(-2px);
}

/* Acento (CTA principal) */
.btn--accent {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-accent);
}

.btn--accent:hover,
.btn--accent:focus-visible {
  background: var(--color-accent-dark);
  box-shadow: 0 8px 28px hsl(35 95% 52% / 0.50);
  transform: translateY(-2px);
}

/* Outline */
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* Outline claro (sobre fondos oscuros) */
.btn--outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.6);
}

.btn--outline-white:hover,
.btn--outline-white:focus-visible {
  background: rgba(255,255,255,0.12);
  border-color: var(--color-white);
  transform: translateY(-2px);
}

/* Tamaños */
.btn--sm {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-5);
}

.btn--lg {
  font-size: var(--text-md);
  padding: var(--space-5) var(--space-10);
}

/* Focus visible accesible */
.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

/* --- ICONOS INLINE SVG --- */
.icon {
  width: 1.25em;
  height: 1.25em;
  flex-shrink: 0;
}

/* --- ESTRELLAS DE VALORACIÓN --- */
.stars {
  display: flex;
  gap: 2px;
  color: hsl(43, 96%, 52%);
}

.stars svg {
  width: 18px;
  height: 18px;
}

/* --- ANIMACIONES SCROLL (clases iniciales) --- */
.anim-fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity  var(--transition-slow),
    transform var(--transition-slow);
}

.anim-fade-in {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.anim-fade-up.is-visible,
.anim-fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delays escalonados */
.anim-delay-1 { transition-delay: 100ms; }
.anim-delay-2 { transition-delay: 200ms; }
.anim-delay-3 { transition-delay: 300ms; }
.anim-delay-4 { transition-delay: 400ms; }

/* --- UTILIDADES --- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-accent  { color: var(--color-accent); }
.text-muted   { color: var(--color-text-muted); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Divider decorativo */
.divider {
  display: block;
  width: 52px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
  margin-block: var(--space-4);
}

.divider--center {
  margin-inline: auto;
}