:root {
  --page-bg-top: #08111f;
  --page-bg-bottom: #020409;
  --glass-border: rgba(255,255,255,0.1);
  --accent-glow: rgba(95,190,255,0.22);
}

html, body {
  min-height: 100%;
}

body {
  position: relative;
  overflow-x: hidden;
  padding-bottom: 72px;
  background:
    radial-gradient(circle at top, rgba(35,99,176,0.22), transparent 36%),
    linear-gradient(180deg, var(--page-bg-top), var(--page-bg-bottom));
}

#particle-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

#particle-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(105,188,255,0.08), transparent 28%),
    radial-gradient(circle at 80% 30%, rgba(255,145,92,0.08), transparent 24%),
    linear-gradient(180deg, rgba(3,6,12,0.12), rgba(3,6,12,0.48));
}

#particle-stage canvas {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0.9;
}

.page-shell,
.container.py-5,
footer.container {
  position: relative;
  z-index: 1;
}

.card.custom-card {
  transition: box-shadow 0.2s, transform 0.2s;
  box-shadow: 0 14px 36px rgba(0,0,0,0.32);
  border-radius: 1rem;
  background: linear-gradient(180deg, rgba(18,25,36,0.88), rgba(7,11,18,0.72));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.07);
}

.card.custom-card:hover {
  box-shadow: 0 18px 42px rgba(0,0,0,0.4), 0 0 30px var(--accent-glow);
  transform: translateY(-4px) scale(1.02);
}

.accordion-item.tool-category {
  background: linear-gradient(180deg, rgba(7,11,18,0.62), rgba(7,11,18,0.42));
  border: 1px solid var(--glass-border);
  border-radius: .75rem !important;
  overflow: hidden;
  margin-bottom: .75rem;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.22);
}

.accordion-button {
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: .02em;
}

.accordion-button:not(.collapsed) {
  background: rgba(255,255,255,0.05);
  color: #fff;
  box-shadow: none;
}

.accordion-button.collapsed {
  background: rgba(255,255,255,0.03);
  color: rgba(255,255,255,0.75);
}

.accordion-button::after {
  filter: invert(1);
}

.accordion-body {
  padding: .75rem;
}

.search-overlay {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  padding: 10px 16px 12px;
  background: rgba(8,12,18,0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 -4px 24px rgba(0,0,0,0.4);
}

.search-inner {
  max-width: 640px;
  margin: 0 auto;
  padding-left: 56px;
}

@media (min-width: 641px) {
  .search-inner {
    padding-left: 0;
  }
}

#toolSearch {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.18);
  color: #fff;
  border-radius: 2rem;
  padding: .45rem 1.1rem;
}

#toolSearch:focus {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,140,60,0.6);
  box-shadow: 0 0 0 .2rem rgba(255,140,60,0.2);
  color: #fff;
  outline: none;
}

#toolSearch::placeholder {
  color: rgba(255,255,255,0.38);
}

.search-empty {
  display: none;
}