/* FSRS+ personalizado EAGVQO MIR 2027 — Tema LAB10: fondo negro, acentos chartreuse y lavanda */
:root {
  --bg: #000000;
  --text: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.7);
  --accent: #ccff00;
  --accent-soft: rgba(204, 255, 0, 0.15);
  --btn-primary: #a080c0;
  --btn-primary-hover: #b090d0;
  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.1);
  --font: "DM Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

body {
  font-family: var(--font);
  max-width: 640px;
  margin: 0 auto;
  padding: 1rem;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  margin-bottom: 1.5rem;
}
header h1 {
  margin: 0 0 0.25rem 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
#resumen { margin: 0; font-size: 0.9rem; color: var(--text-muted); }

.tarjeta {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.tarjeta[aria-hidden="true"] { display: none; }

.meta-pregunta { font-size: 0.85rem; color: var(--text-muted); margin: 0 0 0.25rem 0; }
.asignatura { font-size: 0.85rem; color: var(--text-muted); margin: 0 0 0.5rem 0; }
.contenedor-imagen { margin: 1rem 0; }
.contenedor-imagen[aria-hidden="true"] { display: none; }
.contenedor-imagen img { max-width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--card-border); }
.enunciado {
  font-size: 1.05rem;
  line-height: 1.55;
  margin: 0 0 1rem 0;
  text-align: justify;
}
.opciones {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem 0;
}
.opciones li {
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  text-align: justify;
}
.opciones li:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.opciones li.seleccionada {
  background: var(--accent-soft);
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent);
}
.opciones li.correcta {
  background: rgba(0, 255, 136, 0.12);
  border-color: #00ff88;
}
.opciones li.incorrecta {
  background: rgba(255, 80, 80, 0.15);
  border-color: #ff5050;
}
.retroalimentacion {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: 8px;
  border-left: 4px solid var(--accent);
}
.retroalimentacion[aria-hidden="true"] { display: none; }
.retro-titulo { margin: 0 0 0.5rem 0; font-weight: 600; font-size: 1rem; color: var(--accent); }
.comentario { margin: 0 0 1rem 0; line-height: 1.5; white-space: pre-wrap; color: var(--text-muted); text-align: justify; }
.btn-siguiente { background: var(--btn-primary); color: #fff; margin-top: 0.5rem; font-weight: 600; }
.btn-siguiente:hover { background: var(--btn-primary-hover); }
.rating { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--card-border); }
.rating-label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; color: var(--text-muted); }
.botones { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.btn:hover { opacity: 0.9; }
.btn-secundario { background: transparent; color: var(--accent); border: 2px solid var(--accent); }
.btn-secundario:hover { background: var(--accent-soft); }
.btn.again { background: #ff6b6b; color: #fff; }
.btn.hard { background: #ffb347; color: #000; }
.btn.good { background: #7dd87d; color: #000; }
.btn.easy { background: var(--accent); color: #000; }
.error .tarjeta { border-left: 4px solid #ff6b6b; }
#error-msg { color: #ff6b6b; }

.header-links { margin: 0.25rem 0 0 0; font-size: 0.85rem; }
.header-links a { color: var(--accent); text-decoration: none; }
.header-links a:hover { text-decoration: underline; }

.acciones-secundarias { margin-top: 0.75rem; font-size: 0.85rem; }
.link-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  margin-right: 0.5rem;
  text-decoration: underline;
  font-family: inherit;
}
.link-btn:hover { color: var(--accent); }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal[aria-hidden="true"] { display: none; }
.modal-content {
  background: #111;
  border: 1px solid var(--card-border);
  padding: 1.25rem;
  border-radius: 10px;
  max-width: 480px;
  width: 90%;
  max-height: 85vh;
  overflow: auto;
}
.modal-titulo { margin: 0 0 0.5rem 0; font-weight: 600; color: var(--text); }
.modal-desc { margin: 0 0 0.75rem 0; font-size: 0.9rem; color: var(--text-muted); }
.modal-content textarea { width: 100%; margin-bottom: 0.75rem; resize: vertical; background: var(--card-bg); border: 1px solid var(--card-border); color: var(--text); border-radius: 6px; padding: 0.5rem; }
.modal-botones { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.ia-respuesta {
  margin-top: 1rem;
  padding: 0.75rem;
  background: var(--accent-soft);
  border-radius: 8px;
  white-space: pre-wrap;
  font-size: 0.9rem;
  border: 1px solid rgba(204, 255, 0, 0.3);
}
.ia-respuesta[aria-hidden="true"] { display: none; }

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.6rem 1.2rem;
  background: var(--accent);
  color: #000;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.toast.visible { opacity: 1; }

.revisar-lista { display: flex; flex-direction: column; gap: 1rem; }
.revisar-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 1rem;
}
.revisar-item .meta-pregunta { margin-bottom: 0.5rem; }
.revisar-item .enunciado { font-size: 1rem; text-align: justify; }
.revisar-item .contenedor-imagen img { max-width: 100%; }
.revisar-item .opciones li { cursor: default; text-align: justify; }

/* Selector modo FSRS / Práctica */
.selector-modo h2 { margin: 0 0 1rem 0; font-size: 1.25rem; font-weight: 700; }
.modos { display: flex; flex-direction: column; gap: 1rem; }
.modo-opcion {
  display: block;
  padding: 1rem;
  border: 2px solid var(--card-border);
  border-radius: 10px;
  cursor: pointer;
  background: var(--card-bg);
  transition: border-color 0.2s, background 0.2s;
}
.modo-opcion:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.modo-titulo { display: block; font-weight: 700; margin-bottom: 0.25rem; }
.modo-desc { display: block; font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.btn-iniciar { background: var(--btn-primary); color: #fff; margin-top: 0.25rem; font-weight: 600; }
.btn-iniciar:hover { background: var(--btn-primary-hover); }
.aviso-practica { font-size: 0.85rem; color: var(--accent); margin-top: 0.75rem; padding: 0.5rem; background: var(--accent-soft); border-radius: 8px; border: 1px solid rgba(204, 255, 0, 0.3); }
.aviso-practica[aria-hidden="true"] { display: none; }

/* Configuración de sesión (paso 2) */
.configuracion-sesion h2 { margin: 0 0 1rem 0; font-size: 1.2rem; }
.config-panel[aria-hidden="true"] { display: none; }
.config-desc { font-size: 0.9rem; color: var(--text-muted); margin: 0 0 1rem 0; }
.config-field { display: block; margin-bottom: 1rem; }
.config-field.config-checkbox { display: flex; align-items: center; gap: 0.5rem; }
.config-label { display: block; font-size: 0.9rem; margin-bottom: 0.35rem; color: var(--text-muted); }
.config-field input[type="number"] { width: 100%; max-width: 8rem; padding: 0.5rem; border-radius: 6px; border: 1px solid var(--card-border); background: var(--card-bg); color: var(--text); font-size: 1rem; }
.config-field select { width: 100%; max-width: 20rem; padding: 0.5rem; border-radius: 6px; border: 1px solid var(--card-border); background: var(--card-bg); color: var(--text); font-size: 1rem; }
.config-hint { display: block; font-size: 0.85rem; color: var(--accent); margin-top: 0.25rem; }
.config-botones { display: flex; gap: 0.75rem; align-items: center; margin-top: 1.25rem; }
.config-botones .btn-iniciar { margin: 0; }

/* Técnicas de examen */
.bloque-tecnicas { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--card-border); }
.bloque-tecnicas[aria-hidden="true"] { display: none; }
.tecnicas-titulo { font-weight: 600; margin: 0 0 0.25rem 0; font-size: 0.95rem; }
.tecnicas-desc { font-size: 0.85rem; color: var(--text-muted); margin: 0 0 0.5rem 0; }
#tecnicas-lista { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; }
.tecnicas-check { display: flex; align-items: center; gap: 0.35rem; cursor: pointer; font-size: 0.9rem; }
.tecnicas-check input { margin: 0; }