.border-glow-card {
  --edge-proximity: 0;
  --cursor-angle: 45deg;
  --edge-sensitivity: 30;
  --color-sensitivity: calc(var(--edge-sensitivity) + 20);
  --border-radius: 20px;
  --glow-padding: 40px;
  --cone-spread: 25;

  position: relative;
  border-radius: var(--border-radius);
  isolation: isolate;
  transform: translate3d(0, 0, 0.01px);
  display: grid;
  overflow: visible;
}

/* isp-frame keeps its own border/shadow; other cards get defaults */
.border-glow-card:not(.isp-frame) {
  border: 1px solid rgb(0 0 0 / 8%);
  box-shadow:
    rgba(0,0,0,0.04) 0px 1px 2px,
    rgba(0,0,0,0.04) 0px 2px 4px,
    rgba(0,0,0,0.04) 0px 4px 8px,
    rgba(0,0,0,0.04) 0px 8px 16px;
}

.border-glow-card:hover {
  transform: translateY(-3px) translate3d(0,0,0.01px);
  border-color: transparent;
  box-shadow:
    rgba(0,0,0,0.06) 0px 2px 4px,
    rgba(0,0,0,0.06) 0px 4px 8px,
    rgba(0,0,0,0.06) 0px 8px 16px,
    rgba(0,0,0,0.06) 0px 16px 32px;
}

.border-glow-card::before,
.border-glow-card::after,
.border-glow-card > .edge-light {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  transition: opacity 0.25s ease-out;
  z-index: -1;
}

.border-glow-card:not(:hover)::before,
.border-glow-card:not(:hover)::after,
.border-glow-card:not(:hover) > .edge-light {
  opacity: 0;
  transition: opacity 0.75s ease-in-out;
}

/* colored mesh-gradient border */
.border-glow-card::before {
  border: 1px solid transparent;
  background:
    linear-gradient(var(--card-bg, #fff) 0 100%) padding-box,
    linear-gradient(rgb(255 255 255 / 0%) 0% 100%) border-box,
    var(--gradient-one)  border-box,
    var(--gradient-two)  border-box,
    var(--gradient-three) border-box,
    var(--gradient-four) border-box,
    var(--gradient-five) border-box,
    var(--gradient-six)  border-box,
    var(--gradient-seven) border-box,
    var(--gradient-base) border-box;

  opacity: calc((var(--edge-proximity) - var(--color-sensitivity)) / (100 - var(--color-sensitivity)));

  mask-image:
    conic-gradient(
      from var(--cursor-angle) at center,
      black calc(var(--cone-spread) * 1%),
      transparent calc((var(--cone-spread) + 15) * 1%),
      transparent calc((100 - var(--cone-spread) - 15) * 1%),
      black calc((100 - var(--cone-spread)) * 1%)
    );
}

/* mesh-gradient fill near edges */
.border-glow-card::after {
  background:
    var(--gradient-one)   padding-box,
    var(--gradient-two)   padding-box,
    var(--gradient-three) padding-box,
    var(--gradient-four)  padding-box,
    var(--gradient-five)  padding-box,
    var(--gradient-six)   padding-box,
    var(--gradient-seven) padding-box,
    var(--gradient-base)  padding-box;

  mask-image:
    linear-gradient(to bottom, black, black),
    radial-gradient(ellipse at 50% 50%, black 40%, transparent 65%),
    radial-gradient(ellipse at 66% 66%, black 5%, transparent 40%),
    radial-gradient(ellipse at 33% 33%, black 5%, transparent 40%),
    radial-gradient(ellipse at 66% 33%, black 5%, transparent 40%),
    radial-gradient(ellipse at 33% 66%, black 5%, transparent 40%),
    conic-gradient(from var(--cursor-angle) at center, transparent 5%, black 15%, black 85%, transparent 95%);

  mask-composite: subtract, add, add, add, add, add;
  -webkit-mask-composite: destination-out, destination-over, destination-over, destination-over, destination-over, destination-over;
  opacity: calc(var(--fill-opacity, 0.12) * (var(--edge-proximity) - var(--color-sensitivity)) / (100 - var(--color-sensitivity)));
  mix-blend-mode: soft-light;
}

/* outer glow layer */
.border-glow-card > .edge-light {
  inset: calc(var(--glow-padding) * -1);
  pointer-events: none;
  z-index: 1;

  mask-image:
    conic-gradient(
      from var(--cursor-angle) at center,
      black 2.5%, transparent 10%, transparent 90%, black 97.5%
    );

  opacity: calc((var(--edge-proximity) - var(--edge-sensitivity)) / (100 - var(--edge-sensitivity)));
  mix-blend-mode: plus-lighter;
}

.border-glow-card > .edge-light::before {
  content: "";
  position: absolute;
  inset: var(--glow-padding);
  border-radius: inherit;
  box-shadow:
    inset 0 0 0 1px var(--glow-color, hsl(270deg 60% 70% / 100%)),
    inset 0 0 1px 0   var(--glow-color-60, hsl(270deg 60% 70% / 60%)),
    inset 0 0 3px 0   var(--glow-color-50, hsl(270deg 60% 70% / 50%)),
    inset 0 0 6px 0   var(--glow-color-40, hsl(270deg 60% 70% / 40%)),
    inset 0 0 15px 0  var(--glow-color-30, hsl(270deg 60% 70% / 30%)),
    inset 0 0 25px 2px var(--glow-color-20, hsl(270deg 60% 70% / 20%)),
    inset 0 0 50px 2px var(--glow-color-10, hsl(270deg 60% 70% / 10%)),
    0 0 1px 0   var(--glow-color-60, hsl(270deg 60% 70% / 60%)),
    0 0 3px 0   var(--glow-color-50, hsl(270deg 60% 70% / 50%)),
    0 0 6px 0   var(--glow-color-40, hsl(270deg 60% 70% / 40%)),
    0 0 15px 0  var(--glow-color-30, hsl(270deg 60% 70% / 30%)),
    0 0 25px 2px var(--glow-color-20, hsl(270deg 60% 70% / 20%)),
    0 0 50px 2px var(--glow-color-10, hsl(270deg 60% 70% / 10%));
}

.border-glow-inner {
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
  border-radius: inherit;
  overflow: hidden;
}

/* isl-row: no wrapper, edge-light must stay within row */
.isl-row.border-glow-card > .edge-light {
  inset: 0;                        /* don't bleed outside the row */
  border-radius: 0;
}
.isl-row.border-glow-card > .edge-light::before {
  inset: 0;
}
/* rows: suppress the gradient border ::before (it needs a known solid bg) */
.isl-row.border-glow-card::before {
  display: none;
}