/* ===========================================================
   Mi Mochila — estilos
   Pensado para pantallas de móvil y para manos pequeñas:
   botones grandes, mucho contraste y nada de letra diminuta.
   =========================================================== */

:root {
  --fondo: #f3f5fb;
  --fondo-tarjeta: #ffffff;
  --texto: #1b2039;
  --texto-suave: #6b7392;
  --borde: #e2e6f2;
  --principal: #4f6df5;
  --principal-claro: #e8ecfe;
  --exito: #17a673;
  --exito-claro: #e2f6ee;
  --peligro: #e2564b;
  --sombra: 0 2px 10px rgba(27, 32, 57, .07);
  --radio: 18px;
  --alto-barra: 68px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --fondo: #14161f;
    --fondo-tarjeta: #1e212d;
    --texto: #f0f2f8;
    --texto-suave: #a0a7bf;
    --borde: #2d3244;
    --principal: #7d92ff;
    --principal-claro: #262c47;
    --exito: #3ddba0;
    --exito-claro: #1b3a30;
    --peligro: #ff7a6e;
    --sombra: 0 2px 10px rgba(0, 0, 0, .3);
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
  margin: 0;
  padding: 0 0 calc(var(--alto-barra) + env(safe-area-inset-bottom) + 16px);
  background: var(--fondo);
  color: var(--texto);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.45;
  overflow-x: hidden;
}

/* ---------- Cabecera ---------- */
.cabecera {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: calc(env(safe-area-inset-top) + 20px) 16px 22px;
  background: linear-gradient(135deg, #4f6df5, #7b5cf0);
  color: #fff;
  border-radius: 0 0 26px 26px;
}
.cabecera h1 { margin: 0; font-size: 1.45rem; }
.cabecera p { margin: 2px 0 0; opacity: .85; font-size: .92rem; }
.cabecera-icono { font-size: 2.2rem; }

main { padding: 16px; max-width: 620px; margin: 0 auto; }
.vista { display: block; }
.oculta { display: none !important; }

/* ---------- Tarjetas ---------- */
.tarjeta {
  background: var(--fondo-tarjeta);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: var(--sombra);
}
.tarjeta.destacada { border-color: var(--principal); }
.titulo-seccion { margin: 0 0 10px; font-size: 1.05rem; }
.ayuda { color: var(--texto-suave); font-size: .88rem; margin: 0 0 10px; }
.etiqueta { margin: 0; font-size: .8rem; color: var(--texto-suave); text-transform: uppercase; letter-spacing: .04em; }

/* ---------- Chips de días ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.chip {
  border: 1px solid var(--borde);
  background: var(--fondo-tarjeta);
  color: var(--texto);
  border-radius: 999px;
  padding: 9px 15px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 42px;
}
.chip.activo { background: var(--principal); border-color: var(--principal); color: #fff; }
.chip.apagado { opacity: .55; }

/* ---------- Lista de horas ---------- */
.lista-horas { display: flex; flex-direction: column; gap: 10px; }

.hora {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--fondo-tarjeta);
  border: 1px solid var(--borde);
  border-left: 6px solid var(--borde);
  border-radius: 14px;
  padding: 12px 14px;
  box-shadow: var(--sombra);
}
.hora-reloj {
  font-variant-numeric: tabular-nums;
  font-size: .82rem;
  color: var(--texto-suave);
  text-align: center;
  min-width: 52px;
  line-height: 1.25;
}
.hora-emoji { font-size: 1.6rem; }
.hora-nombre { font-weight: 700; margin: 0; }
.hora-extra { margin: 0; font-size: .82rem; color: var(--texto-suave); }
.hora.ahora { outline: 3px solid var(--principal); outline-offset: 2px; }
.hora.ahora::after { content: "AHORA"; margin-left: auto; font-size: .7rem; font-weight: 800; color: var(--principal); letter-spacing: .06em; }
.hora.descanso { background: var(--principal-claro); border-style: dashed; }
.hora select {
  margin-left: auto;
  max-width: 48%;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--borde);
  background: var(--fondo);
  color: var(--texto);
  font-size: .95rem;
}

/* ---------- Mochila ---------- */
.mochila-cabecera { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.mochila-cabecera h2 { margin: 2px 0 12px; font-size: 1.3rem; text-transform: capitalize; }

.anillo {
  width: 72px; height: 72px; flex: 0 0 72px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: conic-gradient(var(--exito) calc(var(--p, 0) * 1%), var(--borde) 0);
  font-weight: 800;
  font-size: .9rem;
}
.anillo span {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--fondo-tarjeta);
  display: grid; place-items: center;
}
.mensaje { margin: 4px 0 0; font-weight: 600; color: var(--exito); min-height: 1.4em; }

.item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 12px;
  border-radius: 14px;
  border: 1px solid var(--borde);
  background: var(--fondo-tarjeta);
  margin-bottom: 8px;
  cursor: pointer;
}
.item input[type="checkbox"] { width: 26px; height: 26px; flex: 0 0 26px; accent-color: var(--exito); }
.item-txt { flex: 1; }
.item-txt strong { display: block; font-weight: 600; }
.item-txt small { color: var(--texto-suave); }
.item.hecho { background: var(--exito-claro); border-color: var(--exito); }
.item.hecho .item-txt strong { text-decoration: line-through; opacity: .65; }

.lista-deberes { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.deber { display: flex; align-items: center; gap: 10px; }
.deber .borrar { background: none; border: none; font-size: 1.1rem; cursor: pointer; color: var(--texto-suave); }

.vacio { color: var(--texto-suave); font-size: .9rem; text-align: center; padding: 14px 0; }

/* ---------- Asignaturas ---------- */
.asig-fila {
  display: flex; align-items: center; gap: 12px;
  width: 100%;
  padding: 12px;
  margin-bottom: 8px;
  border: 1px solid var(--borde);
  border-left: 6px solid var(--borde);
  border-radius: 14px;
  background: var(--fondo-tarjeta);
  color: var(--texto);
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.asig-fila strong { display: block; }
.asig-fila small { color: var(--texto-suave); }

.etiquetas { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.etiquetas .tag {
  background: var(--principal-claro);
  color: var(--texto);
  border: none;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: .9rem;
  cursor: pointer;
}

/* ---------- Formularios ---------- */
.campo { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 9px 0; }
.campo > span { font-size: .95rem; }
.campo-bloque { flex-direction: column; align-items: stretch; }
input[type="text"], input[type="time"], input[type="number"], select, textarea {
  font: inherit;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid var(--borde);
  background: var(--fondo);
  color: var(--texto);
  min-width: 0;
}
input[type="number"] { width: 92px; text-align: center; }
input[type="time"] { width: 130px; }
.campo-bloque textarea, .campo-bloque input { width: 100%; margin-top: 6px; }
.form-linea { display: flex; gap: 8px; flex-wrap: wrap; }
.form-linea input[type="text"] { flex: 1 1 140px; }
.form-linea select { flex: 0 1 130px; }

.opciones { display: flex; gap: 10px; margin-bottom: 8px; }
.opcion { flex: 1; display: flex; align-items: center; gap: 8px; border: 1px solid var(--borde); border-radius: 14px; padding: 12px; cursor: pointer; }
.opcion small { display: block; color: var(--texto-suave); font-size: .8rem; }
.opcion input { width: 20px; height: 20px; accent-color: var(--principal); }

.paleta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 10px; }
.color { width: 38px; height: 38px; border-radius: 50%; border: 3px solid transparent; cursor: pointer; }
.color.activo { border-color: var(--texto); }

hr { border: none; border-top: 1px solid var(--borde); margin: 14px 0; }

/* ---------- Botones ---------- */
button { font-family: inherit; }
.btn-principal, .btn-secundario, .btn-peligro {
  border-radius: 14px;
  padding: 13px 16px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  min-height: 48px;
}
.btn-principal { background: var(--principal); color: #fff; }
.btn-ancho { width: 100%; }
.btn-secundario { background: var(--fondo-tarjeta); color: var(--texto); border-color: var(--borde); width: 100%; margin-bottom: 8px; }
.btn-peligro { background: transparent; color: var(--peligro); border-color: var(--peligro); width: 100%; }
.btn-mini { background: var(--principal); color: #fff; border: none; border-radius: 12px; padding: 0 16px; font-weight: 700; min-height: 46px; cursor: pointer; }
.fila-botones { display: flex; gap: 8px; }
.fila-botones > * { flex: 1; width: auto; margin-bottom: 0; }

/* ---------- Barra de pestañas ---------- */
.barra-pestanas {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  background: var(--fondo-tarjeta);
  border-top: 1px solid var(--borde);
  padding-bottom: env(safe-area-inset-bottom);
  z-index: 10;
}
.pestana {
  flex: 1;
  border: none;
  background: none;
  color: var(--texto-suave);
  font-size: .72rem;
  font-weight: 700;
  padding: 9px 0 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: pointer;
  min-height: var(--alto-barra);
}
.pestana span { font-size: 1.4rem; }
.pestana.activa { color: var(--principal); }

/* ---------- Ventana modal ---------- */
dialog {
  border: none;
  border-radius: 20px;
  padding: 20px;
  width: min(440px, 92vw);
  background: var(--fondo-tarjeta);
  color: var(--texto);
}
dialog::backdrop { background: rgba(0, 0, 0, .45); }
dialog h3 { margin-top: 0; }

@media (prefers-reduced-motion: no-preference) {
  .item, .chip, .hora { transition: background-color .15s ease, border-color .15s ease; }
}