/* OSA Explainer styles */
:root {
  --bg: #ffffff;
  --fg: #111;
  --muted: #666;
  --border: #e5e7eb;
  --accent: #0a7;
}

/* Page shell */
#osa-explainer {
  max-width: 980px;
  margin: 2rem auto;
  padding: 0 1rem;
  color: var(--fg);
}

/* Toolbar */
.osa-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .5rem;
  background: #fafafa;
  position: sticky;
  top: 0;
  z-index: 1;
}
.osa-toolbar button {
  border: 1px solid var(--border);
  background: #fff;
  padding: .4rem .6rem;
  border-radius: 6px;
  cursor: pointer;
}
.osa-toolbar input[type="search"] {
  flex: 1 1 260px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .4rem .6rem;
}
.osa-toolbar .osa-count {
  color: var(--muted);
}

/* Details/Q&A */
details {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .5rem .75rem;
  margin: .5rem 0;
  background: #fff;
}
details[open] {
  background: #fbfbfb;
}
details > summary {
  cursor: pointer;
  font-weight: 600;
}
details mark {
  background: #fff59d;
}

/* Search mode: hide everything except toolbar and matched blocks */
#osa-explainer.osa-search-active > :not(.osa-toolbar):not([data-search-match="1"]) {
  display: none !important;
}
/* Within matched details, optionally hide filler when searching and show explicit hits */
.osa-search-active details[ data-search-match="1" ] .osa-hide-when-searching { display: none !important; }
.osa-search-active details[ data-search-match="1" ] .osa-search-hit { display: block; }

/* Snippet hint */
.osa-snippet {
  border-left: 3px solid var(--border);
  padding-left: .75rem;
  margin: .25rem 0 .5rem;
}

/* Links */
a { color: #0a66c2; }
hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }

/* Dark mode */
@media (prefers-color-scheme: dark) {
  #osa-explainer {
    color: #e6e6ea;
  }
  .osa-toolbar {
    background: #0f1318;
    border-color: #2a2f39;
  }
  .osa-toolbar button {
    background: transparent;
    color: #e6e6ea;
    border-color: #2a2f39;
  }
  .osa-toolbar input[type="search"] {
    background: #0f1318;
    color: #e6e6ea;
    border-color: #2a2f39;
  }
  details {
    background: #0f1318;
    border-color: #2a2f39;
  }
  details[open] {
    background: #111418;
  }
  details > summary {
    color: #e6e6ea;
  }
  details mark {
    background: rgba(253, 224, 71, .25); /* softer yellow highlight */
  }
  .osa-snippet {
    border-left-color: #2a2f39;
  }
  a { color: #7db9ff; }
  hr { border-top-color: #2a2f39; }
}