/* ============================================================
   sections.css — Formulario 3
   Cards flotantes con borde izquierdo de color
   ============================================================ */

.sections-area {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--c-bg);
}

/* Tarjeta de sección */
.form-section {
  background: var(--c-card);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sec);
  border-left: 4px solid var(--c-border-mid);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-section.open {
  border-left-color: var(--c-navy-mid);
  box-shadow: 0 4px 20px rgba(26,58,107,0.13);
}

/* Header de sección — fila compacta */
.section__header {
  display: flex;
  align-items: stretch;
  cursor: pointer;
  user-select: none;
  min-height: 42px;
}

/* Número de sección — bloque azul lateral */
.section__num-block {
  background: var(--c-blue-pale);
  color: var(--c-navy-mid);
  font-family: var(--ff-title);
  font-size: 18px;
  letter-spacing: 0.04em;
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-right: 1px solid var(--c-border);
  transition: background 0.2s, color 0.2s;
}
.form-section.open .section__num-block {
  background: var(--c-navy-mid);
  color: #ffffff;
}

/* Título */
.section__title-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 10px;
}

.section__title {
  font-family: var(--ff-title);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--c-navy);
  text-transform: uppercase;
}

/* Chevron */
.section__chevron {
  width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--c-subtle);
  font-size: 18px;
  transition: transform 0.25s ease, color 0.2s;
}
.form-section.open .section__chevron {
  transform: rotate(90deg);
  color: var(--c-navy-mid);
}

/* Body */
.section__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.form-section.open .section__body { max-height: 3000px; }

.section__inner { padding: 16px 20px 18px; }

/* Divisor interno entre grupos */
.section__divider {
  height: 1px;
  background: var(--c-blue-soft);
  margin: 12px 0;
}

/* Sub-grupo title */
.group-title {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-navy-mid);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.group-title::before {
  content: '';
  width: 3px;
  height: 12px;
  background: var(--c-blue);
  border-radius: 2px;
  flex-shrink: 0;
}