.shadow-in {
  box-shadow: 0 0 5px 2px rgba(0,0,0,.4) inset,
  0 0 12px 2px rgba(255, 255, 255, .6);
}

.shadow-out {
  box-shadow: 0 3px 5px 0 rgba(0,0,0,0.5),
  0 0 8px 1px rgba(0, 0, 0, .4) inset;
}

.glow-in {
  box-shadow:
    /* bright top highlight */
    inset 0 2px 3px rgba(255, 255, 255, 0.9),

    /* soft light falloff */
    inset 0 10px 12px rgba(255, 255, 255, 0.7),

    /* depth shadow at bottom 
    inset 0 -6px 8px rgba(0, 0, 0, 0.25),*/

    /* optional warm ambient glow */
    0 0 10px rgba(250, 242, 198, 0.35), /* bright top highlight */
    inset 0 2px 3px rgba(255, 255, 255, 0.9),

    /* soft light falloff */
    inset 0 10px 12px rgba(255, 255, 255, 0.35),

    /* depth shadow at bottom 
    inset 0 -6px 8px rgba(0, 0, 0, 0.25) */

    /* optional warm ambient glow */
    0 0 10px rgba(255, 255, 255, 0.35); 
}