:root {
  --sts-kb-border: rgba(148, 163, 184, 0.18);
}

.sts-kb-shell {
  font-family: "Inter", "Segoe UI", Arial, sans-serif;
  color: var(--sts-kb-text-color, #eff6ff);
  background: linear-gradient(135deg, var(--sts-kb-bg-start, #07111f) 0%, var(--sts-kb-bg-end, #193a63) 100%);
  border: 1px solid var(--sts-kb-border);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 25px 50px rgba(15, 23, 42, 0.35);
}

.sts-kb-intro {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 20px;
}

.sts-kb-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.32em;
  font-size: 0.78rem;
  color: var(--sts-kb-accent-color, #6ee7ff);
  margin-bottom: 8px;
}

.sts-kb-title {
  margin: 0 0 8px;
  color: var(--sts-kb-text-color, #ffffff);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1.15;
}

.sts-kb-copy {
  max-width: 680px;
  color: var(--sts-kb-muted-color, #dbeafe);
  margin: 0;
}

.sts-kb-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--sts-kb-accent-color, #6ee7ff) 18%, transparent), color-mix(in srgb, var(--sts-kb-accent-2, #c084fc) 18%, transparent));
  border: 1px solid rgba(148, 163, 184, 0.28);
  color: var(--sts-kb-text-color, #eff6ff);
  font-size: 0.92rem;
}

.sts-kb-search-wrap {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.sts-kb-search-label {
  color: var(--sts-kb-muted);
  font-size: 0.95rem;
}

.sts-kb-search {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 14px;
  padding: 13px 14px;
  background: rgba(15, 23, 42, 0.8);
  color: var(--sts-kb-text-color, #fff);
  box-sizing: border-box;
}

.sts-kb-grid {
  display: grid;
  gap: 18px;
}

.sts-kb-category-card {
  background: var(--sts-kb-panel-color, rgba(8, 18, 33, 0.88));
  border: 1px solid var(--sts-kb-border);
  border-radius: 20px;
  padding: 18px;
  box-shadow: 0 18px 28px rgba(15, 23, 42, 0.25);
}

.sts-kb-category-header {
  display: flex;
  align-items: start;
  gap: 14px;
  margin-bottom: 12px;
}

.sts-kb-category-image {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.sts-kb-category-copy {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sts-kb-category-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.sts-kb-category-icon {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(110, 231, 255, 0.12), rgba(192, 132, 252, 0.18));
  border: 1px solid rgba(148, 163, 184, 0.20);
}

.sts-kb-category-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--sts-kb-text-color, #fff);
}

.sts-kb-category-description {
  margin: 0;
  color: var(--sts-kb-muted-color, #dbeafe);
  font-size: 0.95rem;
}

.sts-kb-qa-list {
  display: grid;
  gap: 10px;
}

.sts-kb-qa {
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.72);
  overflow: hidden;
}

.sts-kb-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  list-style: none;
  padding: 14px 14px 14px 16px;
  color: var(--sts-kb-text-color, #fff);
  font-weight: 600;
}

.sts-kb-question::-webkit-details-marker {
  display: none;
}

.sts-kb-question:after {
  content: "+";
  font-size: 1rem;
  color: var(--sts-kb-accent-color, #6ee7ff);
}

.sts-kb-qa[open] .sts-kb-question:after {
  content: "–";
}

.sts-kb-answer-wrap {
  padding: 0 16px 16px 16px;
}

.sts-kb-answer-image {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: 14px;
  margin-bottom: 12px;
  border: 1px solid rgba(148, 163, 184, 0.18);
}

.sts-kb-answer {
  color: var(--sts-kb-muted-color, #e5eefb);
  line-height: 1.6;
}

.sts-kb-answer p {
  margin-top: 0;
}

.sts-kb-answer ul,
.sts-kb-answer ol {
  margin: 0 0 12px 18px;
}

.sts-kb-empty-state {
  color: var(--sts-kb-muted-color, #dbeafe);
  padding: 12px 0;
}

@media (min-width: 960px) {
  .sts-kb-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}