/* =========================================================================
   Examen — Sprint 8
   ========================================================================= */
.examen { padding-block: var(--space-md); }
.examen__aviso { color: var(--color-text); margin-bottom: 1rem; }
.examen__grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-md);
  align-items: start;
}
.examen__main { min-width: 0; }

/* Cabecera de la evaluación */
.examen__cab {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  margin-bottom: 1.25rem;
}
.examen__eyebrow { font-family: var(--font-head); font-weight: var(--weight-strong); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.72rem; color: var(--color-primary); margin: 0 0 0.3rem; }
.examen__title { font-size: 1.5rem; color: var(--color-ink); margin: 0 0 0.3rem; }
.examen__meta { color: var(--color-muted); font-size: var(--text-sm); font-weight: var(--weight-strong); margin: 0; }
.examen__stepper { display: flex; align-items: center; gap: 0.85rem; margin-top: 1rem; }
.examen__stepper-barra { flex: 1; height: 8px; border-radius: var(--radius-pill); background: var(--color-surface); overflow: hidden; }
.examen__stepper-fill { display: block; height: 100%; border-radius: var(--radius-pill); background: var(--color-primary); transition: width var(--duration) var(--ease); }
.examen__stepper-txt { font-size: var(--text-sm); font-weight: var(--weight-strong); color: var(--color-muted); white-space: nowrap; }
.examen__stepper-txt b { color: var(--color-ink); }
.examen__pregunta.is-falta { animation: examen-shake 0.35s; }
@keyframes examen-shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }
.examen__acciones .examen__volver[hidden], .examen__acciones .btn[hidden] { display: none; }

.examen__pregunta {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  margin: 0 0 1rem;
  background: var(--color-bg);
}
.examen__enunciado {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0;
  margin-bottom: 1rem;
}
.examen__num { font-family: var(--font-head); font-weight: var(--weight-strong); text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.72rem; color: var(--color-primary); }
.examen__pregunta-txt { font-family: var(--font-head); font-weight: var(--weight-strong); font-size: 1.15rem; line-height: 1.35; color: var(--color-ink); }

.examen__opciones { display: grid; gap: 0.6rem; }
/* Opción como tarjeta seleccionable */
.examen__opcion {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}
.examen__opcion:hover { border-color: var(--color-muted); }
.examen__opcion input { position: absolute; opacity: 0; pointer-events: none; }
.examen__opcion-txt { flex: 1; color: var(--color-ink); }
.examen__opcion-check {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary-dark);
  color: #fff;
  opacity: 0;
  transform: scale(0.6);
  transition: opacity var(--duration) var(--ease), transform var(--duration) var(--ease);
}
.examen__opcion.is-sel {
  border-color: var(--color-primary-dark);
  background: rgba(218, 91, 62, 0.06);
}
.examen__opcion.is-sel .examen__opcion-check { opacity: 1; transform: scale(1); }
.examen__opcion:focus-within { outline: 2px solid var(--color-primary-dark); outline-offset: 2px; }

.examen__acciones {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-top: 1.5rem;
}
.examen__volver { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--color-muted); font-weight: var(--weight-strong); font-size: var(--text-sm); text-decoration: none; }
.examen__volver:hover { color: var(--color-ink); }

.examen__resultado {
  margin-top: 1.5rem;
  padding: 1.1rem 1.35rem;
  border-radius: var(--radius);
  font-size: var(--text-base);
}
.examen__resultado.is-aprobado { background: var(--color-success-bg); color: var(--color-success); border: 1px solid var(--color-success-border); }
.examen__resultado.is-reprobado { background: var(--color-surface); color: var(--color-primary-dark); border: 1px solid var(--color-border); }
.examen__resultado.is-error { background: var(--color-danger-bg); color: var(--color-primary-dark); border: 1px solid var(--color-border); }

/* Sidebar de certificación */
.examen__cert-card { border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.25rem; background: var(--color-bg); }
.examen__cert-head { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.examen__cert-ic { flex: 0 0 auto; display: grid; place-items: center; width: 44px; height: 44px; border-radius: var(--radius-sm); background: var(--color-warning-bg); color: var(--color-warning); }
.examen__cert-eyebrow { font-family: var(--font-head); font-weight: var(--weight-strong); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.7rem; color: var(--color-muted); margin: 0; }
.examen__cert-org { color: var(--color-ink); font-size: var(--text-base); }
.examen__cert-req { background: var(--color-surface); border-radius: var(--radius-sm); padding: 0.9rem 1rem; margin-bottom: 1rem; }
.examen__cert-req-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 0.5rem; font-size: var(--text-sm); color: var(--color-muted); }
.examen__cert-req-top strong { color: var(--color-ink); font-size: var(--text-base); }
.examen__cert-lista { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.examen__cert-lista li { display: flex; align-items: center; gap: 0.5rem; font-size: var(--text-sm); color: var(--color-text); }
.examen__cert-lista li .icon { flex: none; color: var(--color-success); }
.examen__cert-lista li .icon-lock { color: var(--color-muted); }

@media (max-width: 900px) {
  .examen__grid { grid-template-columns: 1fr; }
  .examen__aside { position: static; }
}