/* Center + underline the group headers no matter which row they're on */
#country_ski_resorts thead th.snow-current-header {
  text-align: center;
  vertical-align: middle;
  border-bottom: 3px solid #d63031 !important; /* red */
}

#country_ski_resorts thead th.snow-forecast-header {
  text-align: center;
  vertical-align: middle;
  border-bottom: 3px solid #00b894 !important; /* green */
}

/* (Optional) keep the explain row clean and not “double-underlined” */
#country_ski_resorts thead th.snow-explain {
  text-align: center;
  border-bottom: 0 !important;
}

#country_ski_resorts thead th.snow-explain {
  border-bottom: 3px solid #000 !important;
  text-align: center;
}