/* ===== Flashcards – makeover ===== */
.flashcard-container { perspective: 1200px; margin-top: 8px; }
.flashcard {
  position: relative; border-radius: 16px; min-height: 220px;
  background: var(--card-bg, #fff);
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
  transition: transform .55s cubic-bezier(.2,.7,.2,1), box-shadow .3s;
  transform-style: preserve-3d;
}
.flashcard.is-flipped { transform: rotateY(180deg); }
.flashcard-face {
  position: absolute; inset: 0; padding: 20px; border-radius: 16px;
  display: grid; place-items: center; text-align: center;
  font-size: clamp(16px, 2.3vw, 20px);
  backface-visibility: hidden;
}
.flashcard-front { background: var(--fc-front, #ffffff); }
.flashcard-back  { background: var(--fc-back,  #f5f8ff); transform: rotateY(180deg); }

.flashcard-btn { border: 0; padding: 10px 14px; border-radius: 12px; cursor: pointer; }
.flashcard-btn.ghost { background: transparent; border: 1px solid var(--line, #e9eef3); }
.flashcard-btn.rating-btn.hard   { background: #ef4444; color: #fff; }
.flashcard-btn.rating-btn.medium { background: #f59e0b; color: #fff; }
.flashcard-btn.rating-btn.easy   { background: #22c55e; color: #fff; }

.fc-toolbar { display:flex; gap:10px; margin:10px 0 0 0; }

/* ===== Modales ===== */
.fc-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.35); backdrop-filter: blur(2px); z-index: 1200;
}
.fc-modal.hidden, .fc-backdrop.hidden { display:none; }
.fc-modal {
  position: fixed; inset: 0; z-index: 1300; display:grid; place-items: center; padding: 20px;
}
.fc-modal-card {
  width: min(920px, 96vw); max-height: 92vh; overflow: auto;
  background: var(--card-bg, #fff); border-radius: 16px; box-shadow: 0 15px 50px rgba(0,0,0,.2);
}
.fc-modal-header { display:flex; align-items:center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--line, #eaecef); }
.fc-modal-body { padding: 16px 18px; }
.fc-close { border:0; background: transparent; font-size: 18px; cursor:pointer; }

.fc-form { display:grid; gap: 10px; }
.fc-form-row { display:grid; gap:6px; }
.fc-form-row textarea { min-height: 72px; resize: vertical; }
.fc-actions { display:flex; gap:10px; }

.fc-table-wrap { overflow:auto; }
.fc-table { width: 100%; border-collapse: collapse; }
.fc-table th, .fc-table td { border-bottom: 1px solid var(--line, #eaecef); padding: 8px; text-align: left; }
.fc-table td .row-actions { display:flex; gap:6px; }

/* Stats */
.fc-stats-grid {
  display:grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px;
}
.fc-stat { background: var(--chip-bg,#f6f7fb); border:1px solid var(--line,#eaecef); padding:12px; border-radius:12px; }
.fc-stat .k { font-size:12px; opacity:.7; }
.fc-stat .v { font-size:20px; font-weight:700; }

/* Exam */
.fc-exam-bar { display:flex; justify-content: space-between; margin-bottom:10px; font-weight:600; }
.fc-exam-q, .fc-exam-a { padding:12px; border-radius:12px; background: var(--fc-front,#fff); box-shadow: inset 0 0 0 1px var(--line,#eaecef); }
.fc-exam-a { background: var(--fc-back,#f5f8ff); margin-top:8px; }
.fc-exam-actions { display:flex; gap:10px; align-items:center; margin-top:10px; }
.hidden { display:none !important; }

/* Dark mode harmony (si ya tenés .dark en body) */
body.dark {
  --card-bg: #0f1216;
  --line: #1f2732;
  --fc-front: #10141a;
  --fc-back:  #0b1723;
  --chip-bg:  #0d1117;
}
/* ===== Simulador de Exámenes – layout responsive ===== */
.simulador-section {
  margin-top: 24px;
}

.simulador-titulo {
  margin-bottom: 6px;
}

.simulador-subtitulo {
  margin: 0 0 14px;
  font-size: clamp(14px, 1.6vw, 16px);
  opacity: .85;
}

/* Grid fluido que nunca se pisa */
.simulador-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* Card base */
.simulador-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line, #eaecef);
  background: var(--card-bg, #fff);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  cursor: pointer;
}

/* Hover/focus sin romper el layout */
.simulador-card:hover,
.simulador-card:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0,0,0,.08);
  border-color: rgba(46,134,222,.35);
}

/* Imagen con proporción estable para que nada salte ni se superponga */
.card-image-container {
  position: relative;
  aspect-ratio: 16 / 9;           /* mantiene altura estable */
  overflow: hidden;
  background: #0b17231a;
}
.card-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display:block;
  transform: scale(1.02);
  transition: transform .4s ease;
}
.simulador-card:hover .card-image-container img { transform: scale(1.06); }

/* Contenido flexible: nunca se “tapa” */
.card-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  min-height: 120px;
}

.card-content h3 {
  margin: 0;
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.2;
}
.card-content p {
  margin: 0 0 8px;
  font-size: clamp(13px, 1.6vw, 15px);
  opacity: .9;
}

/* Botón siempre visible y “pega” abajo sin tapar texto */
.btn-iniciar {
  margin-top: auto;               /* empuja el botón al fondo */
  align-self: flex-start;
  border: 0;
  padding: 10px 14px;
  border-radius: 10px;
  background: #2e86de;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .2s ease;
}
.simulador-card:hover .btn-iniciar { transform: translateY(-1px); }
.btn-iniciar:active { transform: translateY(0); }

/* Breakpoints suaves */
@media (max-width: 820px) {
  .simulador-grid { gap: 12px; }
}
@media (max-width: 540px) {
  .simulador-subtitulo { margin-bottom: 10px; }
  .simulador-grid { grid-template-columns: 1fr 1fr; } /* dos columnas en móviles grandes */
}
@media (max-width: 420px) {
  .simulador-grid { grid-template-columns: 1fr; }     /* una columna en móviles chicos */
}

/* Modo oscuro alineado con tu theme */
body.dark {
  --card-bg: #0f1216;
  --line: #1f2732;
}
body.dark .simulador-card { box-shadow: 0 8px 24px rgba(0,0,0,.35); }
body.dark .btn-iniciar { background: #2e86de; }

/* Accesibilidad y movimiento reducido */
.simulador-card:focus { outline: 3px solid rgba(46,134,222,.5); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  .simulador-card, .card-image-container img, .btn-iniciar { transition: none; }
}
/* ===== Flashcard estilo “carta física” con marco y textura ===== */
.flashcard-container {
  max-width: 520px;
  margin: 0 auto;
  padding-bottom: 24px;
}

#flashcard {
  position: relative;
  z-index: 1;
  min-height: 300px;
}

.flashcard {
  border-radius: 0;
  background: var(--card-bg, #fff);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  box-shadow:
    0 6px 18px rgba(0, 0, 0, 0.18),   /* sombra principal */
    0 0 0 4px rgba(255, 255, 255, 0.9), /* borde blanco como marco */
    0 0 0 6px rgba(0, 0, 0, 0.1);     /* línea gris externa */
  
  /* textura sutil */
  background-image:
    radial-gradient(rgba(0,0,0,0.015) 1px, transparent 1px),
    radial-gradient(rgba(0,0,0,0.015) 1px, transparent 1px);
  background-size: 12px 12px;
  background-position: 0 0, 6px 6px;
}

.flashcard-face {
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.flashcard-face p {
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.4;
  margin: 0;
}

/* Progreso */
#flashcard-progress {
  margin-top: 12px;
}

/* Dark mode adaptado */
body.dark .flashcard {
  background: var(--fc-front, #10141a);
  box-shadow:
    0 6px 18px rgba(0, 0, 0, 0.6),
    0 0 0 4px rgba(0, 0, 0, 0.6),
    0 0 0 6px rgba(255, 255, 255, 0.05);
  background-image:
    radial-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    radial-gradient(rgba(255,255,255,0.02) 1px, transparent 1px);
}