/* ==================================================
   STARFIELD - Fondo de estrellas con parallax
   Solo se activa cuando <html> tiene la clase .starfield-active
   (horario nocturno 18:00-09:00 y preferencia habilitada).
   ================================================== */

#starfield-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  max-width: none;
  max-height: none;
  z-index: -1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.7s ease;
}

/* Fondo oscuro del documento mientras el canvas pinta (evita flash blanco) */
html.starfield-active {
  background-color: #00141f;
}

html.starfield-active body {
  background-color: transparent;
  background-image: none;
}

html.starfield-active #starfield-canvas {
  opacity: 1;
}

/* --- Botón de toggle del fondo de estrellas --- */
.btn-starfield {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: 0.2s;
  margin-top: 6px;
  width: fit-content;
  border: 1px solid var(--primary);
  background: var(--primary-light);
  color: var(--primary-dark);
}

.btn-starfield.on {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.btn-starfield:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
}

/* --- SweetAlert del selector de fondo de estrellas --- */
.sf-swal {
  border-radius: 22px !important;
  font-family: 'Inter', sans-serif;
  padding: 1.4em 1.6em 1.2em !important;
}
.sf-swal .swal2-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: #0f6a5e;
  padding-top: 0.3em;
}
.sf-swal .swal2-html-container {
  margin: 0.4em 0 0.6em;
  overflow: visible;
}
.sf-opciones {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sf-opcion {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 2px solid #dce7e5;
  border-radius: 14px;
  cursor: pointer;
  transition: 0.2s;
  text-align: left;
  background: #fff;
}
.sf-opcion:hover {
  border-color: var(--primary, #138275);
  background: #f4faf9;
}
.sf-opcion.sel {
  border-color: var(--primary, #138275);
  background: var(--primary-light, #e6f4f2);
  box-shadow: 0 0 0 3px rgba(19, 130, 117, 0.15);
}
.sf-opcion input[type="radio"] { display: none; }
.sf-ico {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 15px;
  color: var(--primary, #138275);
  background: var(--primary-light, #e6f4f2);
  transition: 0.2s;
}
.sf-opcion.sel .sf-ico {
  color: #fff;
  background: linear-gradient(135deg, var(--primary, #138275), var(--primary-dark, #0f6a5e));
}
.sf-txt { flex: 1; display: flex; flex-direction: column; }
.sf-txt b { font-size: 13px; font-weight: 700; color: #123;
  letter-spacing: -0.2px; }
.sf-txt small { font-size: 11px; color: #5b7a74; margin-top: 2px; }
.sf-check {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 2px solid #c3d6d2;
  color: transparent;
  font-size: 11px;
  transition: 0.2s;
}
.sf-opcion.sel .sf-check {
  color: #fff;
  border-color: var(--primary, #138275);
  background: var(--primary, #138275);
}
.sf-btn-confirm {
  font-weight: 700 !important;
  border-radius: 12px !important;
  background: linear-gradient(135deg, var(--primary, #138275), var(--primary-dark, #0f6a5e)) !important;
  padding: 0.7em 1.8em !important;
  box-shadow: 0 6px 16px -6px rgba(19, 130, 117, 0.55) !important;
  letter-spacing: -0.2px;
}
.sf-btn-cancel {
  border-radius: 12px !important;
  font-weight: 600 !important;
  color: #3b5a54 !important;
  background: #eef4f2 !important;
}
.sf-toast {
  border-radius: 14px !important;
  font-family: 'Inter', sans-serif;
}
.sf-toast .swal2-title {
  font-size: 13px;
  font-weight: 700;
}
