/* ---- Hero "div -> div" living signature (replaces repeated wordmark) ---- */
.dd-sig {
  display: inline-flex;
  align-items: center;
  gap: clamp(10px, 1vw, 16px);
  height: 56px;
  font-family: "SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo,
    Consolas, monospace;
  user-select: none;
}

.dd-sig .dd-chip {
  display: inline-flex;
  align-items: center;
  gap: 1px;
  padding: 8px 14px;
  font-size: clamp(16px, 1.6vw, 22px);
  font-weight: 600;
  line-height: 1;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: border-color 0.4s ease, box-shadow 0.4s ease,
    transform 0.4s ease;
}

.dd-sig .dd-chip .b {
  color: #5a6270;
}
.dd-sig .dd-chip .t {
  color: #3decff;
}
.dd-sig .dd-chip.dd-target .t {
  color: #3fffb2;
}

/* connector + traveling pulse */
.dd-sig .dd-link {
  position: relative;
  width: clamp(48px, 6vw, 80px);
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(
    90deg,
    rgba(127, 176, 255, 0.12),
    rgba(127, 176, 255, 0.32),
    rgba(127, 176, 255, 0.12)
  );
}

.dd-sig .dd-pulse {
  position: absolute;
  top: 50%;
  left: 0;
  width: 9px;
  height: 9px;
  margin: -4.5px 0 0 -4.5px;
  border-radius: 50%;
  background: #aecbff;
  box-shadow: 0 0 12px 3px rgba(127, 176, 255, 0.85);
  animation: dd-flow 2.4s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}

@keyframes dd-flow {
  0% {
    left: 0;
    opacity: 0;
    transform: scale(0.6);
  }
  12% {
    opacity: 1;
    transform: scale(1);
  }
  88% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    left: 100%;
    opacity: 0;
    transform: scale(0.6);
  }
}

/* right chip lights up as the pulse arrives */
.dd-sig .dd-chip.dd-target {
  animation: dd-arrive 2.4s ease-in-out infinite;
}
@keyframes dd-arrive {
  0%,
  70% {
    border-color: rgba(255, 255, 255, 0.14);
    box-shadow: none;
  }
  92% {
    border-color: rgba(127, 176, 255, 0.6);
    box-shadow: 0 0 18px rgba(127, 176, 255, 0.3);
  }
  100% {
    border-color: rgba(255, 255, 255, 0.14);
    box-shadow: none;
  }
}

/* flowing word */
.dd-sig .dd-flow {
  margin-left: clamp(4px, 0.6vw, 10px);
  font-size: clamp(12px, 1.1vw, 15px);
  letter-spacing: 0.06em;
  text-transform: lowercase;
  color: #9aa3b2;
  white-space: nowrap;
  min-width: 9ch;
}
.dd-sig .dd-flow b {
  font-weight: 600;
  color: #cfe0ff;
}

/* hover: lift + brighten */
.dd-sig:hover .dd-chip {
  border-color: rgba(127, 176, 255, 0.45);
  box-shadow: 0 0 16px rgba(127, 176, 255, 0.14);
  transform: translateY(-1px);
}

@media (prefers-reduced-motion: reduce) {
  .dd-sig .dd-pulse,
  .dd-sig .dd-chip.dd-target {
    animation: none;
  }
  .dd-sig .dd-pulse {
    left: 50%;
    opacity: 1;
  }
}

@media (max-width: 575px) {
  .dd-sig {
    height: auto;
    flex-wrap: wrap;
    gap: 10px;
  }
}