:root {
  --fondo: #F6F3EE;
  --tarjeta: #FFFFFF;
  --tinta: #1D2A30;
  --tenue: #6B7A80;
  --linea: #E4DED5;
  --primario: #1F4E5F;
  --primario-claro: #E3EEF1;
  --gasto: #C2553D;
  --ingreso: #2F7D5B;
  --ahorro: #8A6D1E;
  --aviso: #B7791F;
  --radio: 14px;
  --sombra: 0 1px 2px rgba(29, 42, 48, .06), 0 4px 16px rgba(29, 42, 48, .05);
}
@media (prefers-color-scheme: dark) {
  :root {
    --fondo: #12191C; --tarjeta: #1B2529; --tinta: #E8EEF0; --tenue: #93A3A9; --linea: #2B383D;
    --primario: #6FB3C8; --primario-claro: #20343B; --gasto: #E58A73; --ingreso: #6CC79C; --ahorro: #D9B65A;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--fondo); color: var(--tinta);
  font-size: 16px; line-height: 1.4;
  -webkit-tap-highlight-color: transparent;
}
.oculto { display: none !important; }
h1, h2 { margin: 0; font-weight: 700; }
.num { font-family: 'DM Mono', ui-monospace, monospace; font-variant-numeric: tabular-nums; }

/* ---------- Botones ---------- */
.btn { border: 0; border-radius: 12px; padding: 14px 18px; font: inherit; font-weight: 700; cursor: pointer; }
.btn-ancho { width: 100%; }
.btn-primario { background: var(--primario); color: #fff; }
@media (prefers-color-scheme: dark) { .btn-primario { color: #0E1416; } }
.btn-secundario { background: transparent; color: var(--tinta); border: 1px solid var(--linea); }
.btn-peligro { background: transparent; color: var(--gasto); border: 1px solid var(--gasto); }
.btn-texto { background: none; border: 0; color: var(--primario); font: inherit; font-weight: 500; cursor: pointer; padding: 4px; }
.btn-icono { background: none; border: 0; font-size: 22px; color: var(--tinta); cursor: pointer; padding: 6px 12px; border-radius: 10px; }
.btn-icono:active { background: var(--primario-claro); }

/* ---------- Login ---------- */
.login { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-caja { width: 100%; max-width: 340px; text-align: center; }
.logo { width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 18px; background: var(--primario); color: #fff;
  display: grid; place-items: center; font-size: 32px; font-weight: 700; }
.sub { color: var(--tenue); margin: 4px 0 24px; }
.campo-clave { position: relative; margin-bottom: 12px; }
.campo-clave input { width: 100%; padding-right: 48px; }
.campo-clave .btn-icono { position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font-size: 18px; }

/* ---------- Estructura ---------- */
.barra { position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: center;
  padding: 14px 18px; padding-top: max(14px, env(safe-area-inset-top)); background: var(--primario); color: #fff; }
.barra .btn-texto { color: #fff; opacity: .85; }
@media (prefers-color-scheme: dark) { .barra { background: #0E1416; } }
.barra-titulo { font-weight: 700; }
.barra-perfil { margin-left: 8px; opacity: .75; font-size: 14px; }
main { max-width: 640px; margin: 0 auto; padding: 16px 16px 110px; }
.vista h2 { font-size: 20px; }

.pestanas { position: fixed; left: 0; right: 0; bottom: 0; z-index: 5; display: flex; justify-content: space-around;
  background: var(--tarjeta); border-top: 1px solid var(--linea); padding: 8px 8px max(8px, env(safe-area-inset-bottom)); }
.pestanas button { flex: 1; background: none; border: 0; font: inherit; font-size: 12px; color: var(--tenue);
  display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 6px 0; cursor: pointer; }
.pestanas .ico { font-size: 20px; line-height: 1; }
.pestanas button.activo { color: var(--primario); font-weight: 700; }
.pestanas .cargar .ico { background: var(--primario); color: #fff; width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center; margin-top: -18px; box-shadow: var(--sombra); }

/* ---------- Selector de mes ---------- */
.selector-mes { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }

/* ---------- Tarjetas del resumen ---------- */
.tarjeta { background: var(--tarjeta); border-radius: var(--radio); box-shadow: var(--sombra); padding: 16px; margin-bottom: 12px; }
.tarjeta h3 { margin: 0 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--tenue); font-weight: 700; }
.saldo-grande { font-size: 34px; font-weight: 500; margin: 2px 0 12px; }
.saldo-grande.negativo { color: var(--gasto); }
.renglones { display: grid; gap: 8px; }
.renglon { display: flex; justify-content: space-between; gap: 12px; }
.renglon .etq { color: var(--tenue); }
.renglon.total { border-top: 1px solid var(--linea); padding-top: 8px; font-weight: 700; }
.c-gasto { color: var(--gasto); } .c-ingreso { color: var(--ingreso); } .c-ahorro { color: var(--ahorro); }
.barra-prop { height: 8px; border-radius: 4px; background: var(--primario-claro); overflow: hidden; margin: 4px 0 12px; display: flex; }
.barra-prop span { display: block; height: 100%; }
.vacio { text-align: center; color: var(--tenue); padding: 32px 12px; }
.estimado-nota { font-size: 13px; color: var(--tenue); margin-top: 8px; }

/* ---------- Lista de movimientos ---------- */
.buscador { width: 100%; margin-bottom: 12px; }
.grupo-dia { font-size: 13px; color: var(--tenue); font-weight: 700; margin: 16px 4px 6px; }
.item { display: flex; gap: 12px; align-items: center; background: var(--tarjeta); border-radius: 12px; padding: 12px 14px;
  margin-bottom: 6px; box-shadow: var(--sombra); cursor: pointer; }
.item:active { transform: scale(.99); }
.item-cuerpo { flex: 1; min-width: 0; }
.item-titulo { font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.item-sub { font-size: 13px; color: var(--tenue); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.item-monto { text-align: right; white-space: nowrap; }
.item-monto .total { font-size: 12px; color: var(--tenue); }
.etiquetas { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 4px; }
.etiqueta { font-size: 11px; padding: 2px 7px; border-radius: 99px; background: var(--primario-claro); color: var(--primario); font-weight: 700; }
.etiqueta.est { background: transparent; border: 1px dashed var(--aviso); color: var(--aviso); }
.pie-lista { display: flex; justify-content: space-between; padding: 12px 4px; color: var(--tenue); font-size: 14px; }

/* ---------- Formulario ---------- */
form .campo { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; min-width: 0; }
form .campo > span { font-size: 13px; color: var(--tenue); font-weight: 500; }
.fila, .fila-monto { display: flex; gap: 10px; }
.crece { flex: 1; }
input, select { font: inherit; color: var(--tinta); background: var(--tarjeta); border: 1px solid var(--linea);
  border-radius: 10px; padding: 12px; width: 100%; min-width: 0; appearance: none; -webkit-appearance: none; }
select { background-image: linear-gradient(45deg, transparent 50%, var(--tenue) 50%), linear-gradient(135deg, var(--tenue) 50%, transparent 50%);
  background-position: calc(100% - 18px) 55%, calc(100% - 13px) 55%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 30px; }
input:focus, select:focus { outline: 2px solid var(--primario); outline-offset: 0; border-color: transparent; }
input[name="monto_total"] { font-family: 'DM Mono', monospace; font-size: 26px; padding: 10px 12px; }
input[name="cuotas"] { width: 80px; }
input[name="pct_propio"] { width: 74px; }
.fila-monto select { width: 96px; }

.segmentado { display: flex; background: var(--primario-claro); border-radius: 12px; padding: 4px; gap: 4px; margin: 14px 0; }
.segmentado button { flex: 1; border: 0; background: none; font: inherit; font-size: 14px; padding: 10px 4px; border-radius: 9px;
  color: var(--primario); cursor: pointer; font-weight: 500; }
.segmentado button.activo { background: var(--tarjeta); box-shadow: var(--sombra); font-weight: 700; color: var(--tinta); }
.segmentado.chico { max-width: 260px; margin-top: 0; }

.periodo-info { display: flex; align-items: center; gap: 8px; min-height: 48px; }
.ayuda { font-size: 13px; color: var(--tenue); margin: -6px 0 12px; }
.bloque-opciones { background: var(--tarjeta); border-radius: var(--radio); padding: 6px 14px; box-shadow: var(--sombra); margin-bottom: 14px; }
.interruptor { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; cursor: pointer; }
.interruptor + .interruptor, .sub-bloque + .interruptor { border-top: 1px solid var(--linea); }
.interruptor input { order: 2; width: 46px; height: 28px; border-radius: 99px; padding: 0; position: relative; flex: none;
  background: var(--linea); border: 0; transition: background .15s; cursor: pointer; }
.interruptor input::after { content: ''; position: absolute; top: 3px; left: 3px; width: 22px; height: 22px; border-radius: 50%;
  background: #fff; transition: left .15s; box-shadow: 0 1px 3px rgba(0,0,0,.2); }
.interruptor input:checked { background: var(--primario); }
.interruptor input:checked::after { left: 21px; }
.sub-bloque { padding-bottom: 4px; }
.acciones { display: grid; gap: 10px; }
.error { color: var(--gasto); font-size: 14px; min-height: 1em; margin: 6px 0; }

/* ---------- Aviso y carga ---------- */
.aviso { position: fixed; left: 50%; bottom: 96px; transform: translateX(-50%); background: var(--tinta); color: var(--fondo);
  padding: 12px 18px; border-radius: 12px; font-size: 14px; z-index: 20; box-shadow: var(--sombra); max-width: 90vw; }
.cargando { position: fixed; inset: 0; background: rgba(246, 243, 238, .55); display: grid; place-items: center; z-index: 30; }
@media (prefers-color-scheme: dark) { .cargando { background: rgba(18, 25, 28, .55); } }
.spinner { width: 34px; height: 34px; border-radius: 50%; border: 3px solid var(--primario-claro); border-top-color: var(--primario); animation: gira .8s linear infinite; }
@keyframes gira { to { transform: rotate(360deg); } }