:root {
  --fondo: #f7f3ff;
  --tarjeta: #ffffff;
  --texto: #2a1f3d;
  --suave: #6b5f80;
  --linea: #e6ddf5;
  --morado: #7c3aed;
  --rosa: #db2777;
  --verde: #059669;
  --ambar: #b45309;
  --rojo: #dc2626;
  --degradado: linear-gradient(120deg, #7c3aed, #db2777);
  --sombra: 0 6px 24px rgba(76, 29, 149, 0.10);
  --radio: 18px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fondo: #160f24;
    --tarjeta: #221837;
    --texto: #f1eafd;
    --suave: #b7a9cf;
    --linea: #3a2d55;
    --morado: #a78bfa;
    --rosa: #f472b6;
    --verde: #34d399;
    --ambar: #fbbf24;
    --rojo: #f87171;
    --sombra: 0 6px 24px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--fondo);
  color: var(--texto);
  line-height: 1.5;
  font-size: 17px;
}
[hidden] { display: none !important; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: 1.7rem; }
h2 { font-size: 1.35rem; }
a { color: var(--morado); }
.suave { color: var(--suave); }
.error { color: var(--rojo); min-height: 1.5em; margin: .5em 0 0; }

.tarjeta {
  background: var(--tarjeta);
  border: 1px solid var(--linea);
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  padding: 20px;
}
.rejilla { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.pila > * + * { margin-top: 16px; }
.fila { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.boton {
  font: inherit; font-weight: 600;
  border: 1px solid var(--linea);
  background: var(--tarjeta); color: var(--texto);
  padding: .55em 1.1em; border-radius: 999px; cursor: pointer;
  text-decoration: none; display: inline-flex; align-items: center; gap: .4em;
}
.boton:hover { border-color: var(--morado); }
.boton.principal { background: var(--degradado); color: #fff; border: none; }
.boton.peligro { color: var(--rojo); }
.boton.mini { padding: .3em .8em; font-size: .9rem; }
.boton:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--rosa); outline-offset: 2px;
}

label { display: block; font-weight: 600; margin-top: 12px; }
input, select, textarea {
  font: inherit; width: 100%; margin-top: 4px;
  padding: .55em .7em; border-radius: 12px;
  border: 1px solid var(--linea); background: var(--fondo); color: var(--texto);
}
textarea { min-height: 80px; resize: vertical; }

/* Entrar */
.entrar { min-height: 100vh; display: grid; place-items: center; padding: 16px;
  background: radial-gradient(circle at 20% 10%, rgba(219, 39, 119, .18), transparent 40%),
              radial-gradient(circle at 80% 90%, rgba(124, 58, 237, .22), transparent 45%), var(--fondo); }
.entrar-caja { width: 100%; max-width: 380px; text-align: center; }
.entrar-caja label { text-align: left; }
.entrar-caja .boton { width: 100%; justify-content: center; margin-top: 18px; }
.logo { width: 64px; height: 64px; margin: 0 auto 10px; border-radius: 20px; background: var(--degradado);
  color: #fff; font-size: 34px; display: grid; place-items: center; }

/* Cabecera */
.cabecera {
  position: sticky; top: 0; z-index: 5;
  background: var(--degradado); color: #fff;
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; padding: 10px 16px;
}
.marca { font-weight: 800; font-size: 1.1rem; white-space: nowrap; }
.menu { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
.menu a { color: #fff; text-decoration: none; padding: .35em .8em; border-radius: 999px; font-weight: 600; }
.menu a[aria-current="page"], .menu a:hover { background: rgba(255, 255, 255, .22); }

.vista { max-width: 1000px; margin: 0 auto; padding: 20px 16px 60px; outline: none; }

.aviso-conexion { background: #fde68a; color: #422006; padding: 10px 16px; text-align: center; font-weight: 600; }

/* Pomodoro */
.pomodoro { display: flex; align-items: center; gap: 6px; background: rgba(255, 255, 255, .18);
  border-radius: 999px; padding: 4px 6px 4px 12px; }
.pomodoro .tiempo { font-variant-numeric: tabular-nums; font-weight: 800; min-width: 3.2em; }
.pomodoro .fase { font-size: .85rem; opacity: .9; }
.pomodoro button { font: inherit; border: none; background: rgba(255, 255, 255, .25); color: #fff;
  border-radius: 999px; padding: .2em .7em; cursor: pointer; font-weight: 700; }
.descanso-caja { text-align: center; }
.descanso-caja .grande { font-size: 3rem; font-weight: 800; font-variant-numeric: tabular-nums; }

/* Etiquetas */
.chip { display: inline-block; font-size: .78rem; font-weight: 700; padding: .15em .7em; border-radius: 999px;
  background: var(--fondo); border: 1px solid var(--linea); color: var(--suave); }
.chip.examen { background: #fce7f3; color: #9d174d; border-color: #fbcfe8; }
.chip.tarea { background: #e0f2fe; color: #075985; border-color: #bae6fd; }
.chip.aviso { background: #fef3c7; color: #92400e; border-color: #fde68a; }
.punto { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }

.cuenta-atras { font-size: 2.4rem; font-weight: 800; background: var(--degradado);
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.pregunta-amable { border: 2px dashed var(--rosa); }

/* Calendario */
.mes-cab { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.mes { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.mes .dia-sem { text-align: center; font-size: .8rem; font-weight: 700; color: var(--suave); }
.mes .dia { min-height: 64px; border-radius: 12px; border: 1px solid var(--linea); background: var(--tarjeta);
  padding: 4px; font: inherit; color: inherit; text-align: left; cursor: pointer; display: flex; flex-direction: column; gap: 2px; }
.mes .dia.fuera { opacity: .35; }
.mes .dia.hoy { border: 2px solid var(--rosa); }
.mes .dia .num { font-size: .85rem; font-weight: 700; }
.mes .dia .marca-ev { font-size: .68rem; line-height: 1.2; border-radius: 6px; padding: 1px 4px; color: #fff;
  overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.lista-eventos { list-style: none; padding: 0; margin: 0; }
.lista-eventos li { border-bottom: 1px solid var(--linea); padding: 10px 0; }
.lista-eventos li:last-child { border-bottom: none; }

/* Ejercicios */
.pregunta { border-left: 5px solid var(--morado); }
.opciones { display: grid; gap: 8px; margin-top: 10px; }
.opcion { display: flex; gap: 10px; align-items: center; border: 1px solid var(--linea); border-radius: 12px;
  padding: 10px 12px; cursor: pointer; font-weight: 500; margin: 0; }
.opcion input { width: auto; margin: 0; }
.opcion:has(input:checked) { border-color: var(--morado); background: rgba(124, 58, 237, .08); }
.clasificar-fila { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; align-items: center; margin-top: 8px; }
.clasificar-fila select { margin: 0; }
.correccion { margin-top: 12px; padding: 12px; border-radius: 12px; }
.correccion.bien { background: rgba(5, 150, 105, .12); }
.correccion.casi { background: rgba(180, 83, 9, .12); }
.correccion.mal { background: rgba(220, 38, 38, .10); }
.progreso-barra { height: 10px; background: var(--linea); border-radius: 999px; overflow: hidden; }
.progreso-barra > div { height: 100%; background: var(--degradado); }
.nota-final { font-size: 3rem; font-weight: 800; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--linea); vertical-align: top; }
th { font-size: .85rem; color: var(--suave); }

dialog { border: none; border-radius: var(--radio); padding: 0; width: min(620px, calc(100vw - 24px));
  max-height: calc(100vh - 24px); overflow-y: auto;
  background: var(--tarjeta); color: var(--texto); box-shadow: 0 20px 60px rgba(0, 0, 0, .35); }
dialog::backdrop { background: rgba(22, 15, 36, .55); }
dialog form { padding: 20px; }
dialog .acciones { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; margin-top: 18px; }

/* Rincón K-pop del descanso */
.descanso-idea { background: var(--fondo); border: 1px solid var(--linea); border-radius: 12px;
  padding: 8px 12px; margin: 10px 0 14px; font-size: .95rem; }
.kpop-bloque { text-align: left; border-top: 1px solid var(--linea); padding-top: 14px; margin-top: 12px; }
.kpop-cab { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
.kpop-cab h3 { margin: 0; font-size: 1.1rem; }
.kpop-filtros { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.kpop-chip { font: inherit; font-size: .82rem; font-weight: 700; padding: .3em .8em; border-radius: 999px;
  border: 1px solid var(--linea); background: var(--fondo); color: var(--texto); cursor: pointer; }
.kpop-chip.activo { background: var(--degradado); color: #fff; border-color: transparent; }
.kpop-tarjeta { background: var(--fondo); border: 1px solid var(--linea); border-radius: 16px; overflow: hidden; }
.kpop-foto { width: 100%; max-height: 250px; object-fit: cover; object-position: center 20%; display: block; background: var(--linea); }
.kpop-cuerpo { padding: 14px 16px; }
.kpop-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 6px; font-size: .82rem; }
.kpop-grupo { background: var(--degradado); color: #fff; font-weight: 800; padding: .15em .75em; border-radius: 999px; }
.kpop-cuerpo h4 { margin: 4px 0 8px; font-size: 1.12rem; line-height: 1.3; }
.kpop-cuerpo p { margin: 0 0 10px; font-size: .96rem; }
.kpop-sabias { background: var(--tarjeta); border-left: 4px solid var(--rosa); border-radius: 10px;
  padding: 8px 12px; font-size: .88rem; margin-top: 8px; }
.kpop-pie { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-top: 10px; }
.kpop-fuente { font-size: .78rem; color: var(--suave); }
.kpop-fav-lista { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.kpop-fav-item { display: inline-flex; align-items: center; gap: 6px; margin: 0; padding: .3em .8em;
  border: 1px solid var(--linea); border-radius: 999px; background: var(--fondo); font-size: .9rem; cursor: pointer; }
.kpop-fav-item input { width: auto; margin: 0; }
.kpop-fav-item:has(input:checked) { border-color: var(--rosa); background: rgba(219, 39, 119, .10); }

/* Panel de seguimiento de papá */
.chip.fuerte { background: #d1fae5; color: #065f46; border-color: #a7f3d0; }
.chip.marcha { background: #fef3c7; color: #92400e; border-color: #fde68a; }
.chip.reforzar { background: #fee2e2; color: #991b1b; border-color: #fecaca; }
.consejo-caja { border: 1px solid var(--linea); border-left: 5px solid var(--morado); border-radius: 14px;
  padding: 14px 16px; background: var(--fondo); }
.consejo-caja.alta { border-left-color: var(--rojo); }
.consejo-caja.media { border-left-color: var(--ambar); }
.consejo-caja.positiva { border-left-color: var(--verde); }
.consejo-ayuda { background: var(--tarjeta); border: 1px dashed var(--morado); border-radius: 10px;
  padding: 10px 12px; margin-top: 8px; }
.fallo-caja { border: 1px solid var(--linea); border-left: 4px solid var(--rojo); border-radius: 12px;
  padding: 12px 14px; background: var(--fondo); }
.fallo-caja.parcial { border-left-color: var(--ambar); }
.fallo-sol { background: rgba(5, 150, 105, .10); border-radius: 8px; padding: 6px 10px; margin-top: 6px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .mes .dia { min-height: 48px; }
  .mes .dia .marca-ev { font-size: 0; height: 6px; padding: 0; }
  .clasificar-fila { grid-template-columns: 1fr; }
}

/* Fotos para Claude */
.fotos-rejilla { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.foto { margin: 0; border: 1px solid var(--linea); border-radius: 12px; overflow: hidden; background: var(--fondo); }
.foto img { display: block; width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.foto-heic { display: grid; place-items: center; aspect-ratio: 3 / 4; text-align: center; font-weight: 700; padding: 8px; }
.foto figcaption { display: flex; flex-direction: column; gap: 4px; padding: 8px; font-size: .85rem; overflow-wrap: anywhere; }
.foto figcaption .boton { align-self: flex-start; }
.subir-foto { cursor: pointer; }

/* Practicar: elegir asignatura y exámenes plegables */
.elegir-asig { margin: 0 0 16px; }
.grupo-examen > summary { cursor: pointer; list-style: none; padding: 4px 0 10px; }
.grupo-examen > summary::-webkit-details-marker { display: none; }
.grupo-examen > summary h2 { display: inline; margin: 0; }
.grupo-examen > summary h2::before { content: '▸ '; color: var(--morado); }
.grupo-examen[open] > summary h2::before { content: '▾ '; }
.grupo-examen > summary .suave { display: block; margin-top: 2px; }
.examen-mas h2 { font-size: 1.1rem; }

/* Asignaturas para estudiar lo que quieras */
.materias { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; margin-bottom: 12px; }
a.tarjeta.materia { display: block; color: var(--texto); text-decoration: none; padding: 16px; position: relative; }
a.tarjeta.materia:hover, a.tarjeta.materia:focus-visible { outline: 2px solid var(--morado); outline-offset: 2px; }
.materia h2 { font-size: 1.05rem; margin: 6px 0 4px; }
.materia p { margin: 0 0 6px; font-size: .85rem; }
.materia .punto { display: block; width: 14px; height: 14px; border-radius: 50%; }
.tarjeta.destacada { border: 2px solid var(--morado); }
.tarjeta h3 { margin: 0 0 6px; font-size: 1.02rem; }

.avisos-agente { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.avisos-agente li { padding: 8px 10px; border-radius: 10px; background: var(--fondo); border: 1px solid var(--linea); white-space: pre-line; }
.avisos-agente li.aviso-falta, .avisos-agente li.aviso-duda { border-left: 4px solid var(--ambar); }
.avisos-agente li.aviso-error { border-left: 4px solid var(--rojo); }
.avisos-agente li.aviso-hecho { border-left: 4px solid var(--verde); }