/* ==========================================================
   DARK SPLIT
   - Ultra dark cards with silver gradient borders
   - Per-paragraph framing
========================================================== */

@keyframes darkSplitBeam {
  0%   { opacity: 0; transform: translate(-150%, -150%) rotate(22deg); }
  45%  { opacity: 0.45; }
  55%  { opacity: 0.6; }
  80%  { opacity: 0.3; }
  100% { opacity: 0; transform: translate(180%, 180%) rotate(22deg); }
}

@keyframes darkSplitUnderline {
  0%   { width: 0%; }
  50%  { width: 100%; }
  100% { width: 0%; }
}

.ulse-dark-split {
  font-family: "Noto Sans", "Roboto", Arial, sans-serif;
  max-width: none;
  width: 100%;
  margin: 0 auto 32px;
  padding: 0;
  background: transparent;
  color: #f2f2f2;
  border-radius: 0;
  position: relative;
}

.ulse-dark-split article {
  margin: 0;
  display: grid;
  gap: 18px;
  width: 100%;
}

.ulse-dark-split h2,
.ulse-dark-split h3,
.ulse-dark-split h4 {
  margin: 12px 0 8px;
  font-weight: 800;
  background: linear-gradient(90deg, #f5f5f5, #dcdcdc, #ffffff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 16px rgba(255,255,255,0.25);
}

.ulse-dark-split h2 { font-size: 32px; }
.ulse-dark-split h3 { font-size: 24px; }

.ulse-dark-split .ulse-para {
  position: relative;
  padding: 18px 20px 20px;
  border-radius: 18px;
  background: linear-gradient(145deg, #060606, #0b0b0b);
  border: 1px solid rgba(190,190,190,0.25);
  box-shadow:
    0 0 28px rgba(255,255,255,0.08),
    inset 0 0 24px rgba(255,255,255,0.02);
  overflow: hidden;
}

.ulse-dark-split .ulse-para::before,
.ulse-dark-split .ulse-para::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 20px;
  pointer-events: none;
}

.ulse-dark-split .ulse-para::before {
  background: linear-gradient(120deg, #f6f6f6 0%, #d4d4d4 40%, #a8a8a8 60%, #f6f6f6 100%);
  mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  padding: 3px;
  box-shadow:
    0 0 16px rgba(255,255,255,0.18),
    0 0 26px rgba(255,255,255,0.08);
}

.ulse-dark-split .ulse-para::after {
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background: linear-gradient(
    115deg,
    transparent 0%,
    rgba(255,255,255,0.08) 38%,
    rgba(255,255,255,0.16) 52%,
    rgba(255,255,255,0.08) 65%,
    transparent 100%
  );
  filter: blur(1.5px);
  animation: darkSplitBeam 8s linear infinite;
}

.ulse-dark-split .ulse-para.para-first {
  border-color: rgba(220,220,220,0.35);
  box-shadow:
    0 0 32px rgba(255,255,255,0.12),
    inset 0 0 24px rgba(255,255,255,0.04);
}

.ulse-dark-split .ulse-para:hover {
  box-shadow:
    0 0 32px rgba(255,255,255,0.12),
    inset 0 0 24px rgba(255,255,255,0.04);
  transform: translateY(-1px);
}

.ulse-dark-split .ulse-para p {
  margin: 0;
  color: #e8ecf2;
  line-height: 1.9;
  position: relative;
  padding-bottom: 10px;
}

.ulse-dark-split .ulse-para p::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  height: 2px;
  width: 0%;
  border-radius: 2px;
  background: linear-gradient(90deg, #b5b5b5, #ffffff, #cfcfcf);
  box-shadow: 0 0 8px rgba(255,255,255,0.35);
  animation: darkSplitUnderline 2.6s ease-in-out infinite;
}

.ulse-dark-split strong,
.ulse-dark-split b {
  font-weight: 800;
  background: linear-gradient(90deg, #ffffff, #cfcfcf, #f5f5f5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: #f2f2f2;
  text-shadow: 0 0 10px rgba(255,255,255,0.25);
}

.ulse-dark-split a {
  color: #e2e2e2;
  font-weight: 700;
  text-decoration: none;
  position: relative;
}

.ulse-dark-split a::after {
  content: "";
  position: absolute;
  bottom: -3px;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, #bfbfbf, #ffffff);
  box-shadow: 0 0 8px rgba(255,255,255,0.4);
  transition: width 0.3s ease;
}

.ulse-dark-split a:hover {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.ulse-dark-split a:hover::after {
  width: 100%;
}

@media (max-width: 640px) {
  .ulse-dark-split {
    padding: 26px 18px;
    margin: 32px auto;
  }
}