:root {
  --knowledge-ink: #25324b;
  --knowledge-muted: #667085;
  --knowledge-line: #e8ecf2;
  --knowledge-soft: #f6f8fb;
  --knowledge-accent: #4f46e5;
  --knowledge-accent-soft: #eef2ff;
}

.knowledge-header-button {
  width: 2.35rem;
  height: 2.35rem;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(52, 71, 103, .14);
  border-radius: 50%;
  background: rgba(255, 255, 255, .72);
  color: #53627a;
  transition: background .16s ease, color .16s ease, border-color .16s ease, transform .16s ease;
}

.knowledge-header-button:hover,
.knowledge-header-button:focus-visible {
  background: var(--knowledge-accent-soft);
  border-color: rgba(79, 70, 229, .28);
  color: var(--knowledge-accent);
  transform: translateY(-1px);
  outline: none;
}

.knowledge-header-button .material-icons-round { font-size: 1.3rem; }

.knowledge-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: min(470px, 100vw);
  height: 100vh;
  background: #fff;
  z-index: 1060;
  transform: translateX(105%);
  transition: transform .22s cubic-bezier(.2, .8, .2, 1);
  box-shadow: -18px 0 55px rgba(22, 31, 52, .18);
  display: flex;
  flex-direction: column;
  color: var(--knowledge-ink);
}

.knowledge-panel.open { transform: none; }

.knowledge-panel > header {
  min-height: 5.25rem;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--knowledge-line);
  background: linear-gradient(135deg, #fff, #f8f9ff);
}

.knowledge-panel > header small {
  color: var(--knowledge-accent);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .1em;
}

.knowledge-panel > header h5 { margin: .12rem 0 0; color: var(--knowledge-ink); }

.knowledge-panel > header button {
  width: 2.3rem;
  height: 2.3rem;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--knowledge-muted);
  display: grid;
  place-items: center;
}

.knowledge-panel > header button:hover { background: #eef1f5; color: var(--knowledge-ink); }

.knowledge-panel-mark {
  width: 2.65rem;
  height: 2.65rem;
  display: grid;
  place-items: center;
  border-radius: .8rem;
  color: #fff;
  background: linear-gradient(135deg, #344767, #4f46e5);
  box-shadow: 0 6px 14px rgba(79, 70, 229, .2);
}

.knowledge-overlay { position: fixed; inset: 0; background: rgba(16, 24, 40, .38); backdrop-filter: blur(2px); z-index: 1050; }

.knowledge-search {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: 1rem 1.25rem 0;
  padding: .25rem .3rem .25rem .8rem;
  border: 1px solid #dfe4ec;
  border-radius: .8rem;
  background: #fff;
  box-shadow: 0 2px 8px rgba(25, 35, 55, .04);
}

.knowledge-search > i { color: #98a2b3; font-size: 1.2rem; }
.knowledge-search input { min-width: 0; flex: 1; padding: .55rem 0; border: 0; outline: 0; color: var(--knowledge-ink); background: transparent; }
.knowledge-search button { border: 0; border-radius: .6rem; background: var(--knowledge-ink); color: #fff; padding: .55rem .8rem; font-size: .76rem; font-weight: 600; }

.knowledge-content { padding: 1.25rem; overflow: auto; flex: 1; }
.knowledge-results-label { margin: 0 0 .7rem; color: var(--knowledge-muted); font-size: .76rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }

.knowledge-card {
  width: 100%;
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr) auto;
  align-items: center;
  gap: .8rem;
  padding: .9rem;
  margin-bottom: .65rem;
  border: 1px solid var(--knowledge-line);
  border-radius: .85rem;
  background: #fff;
  color: inherit;
  text-align: left;
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}

.knowledge-card:hover { border-color: #cbd1ff; box-shadow: 0 7px 18px rgba(40, 49, 78, .08); transform: translateY(-1px); }
.knowledge-card-icon { width: 2.5rem; height: 2.5rem; display: grid; place-items: center; border-radius: .7rem; background: var(--knowledge-accent-soft); color: var(--knowledge-accent); }
.knowledge-card small, .knowledge-card strong, .knowledge-card span span { display: block; }
.knowledge-card small { color: var(--knowledge-accent); font-size: .65rem; font-weight: 700; text-transform: uppercase; }
.knowledge-card strong { margin: .12rem 0; color: var(--knowledge-ink); font-size: .9rem; }
.knowledge-card span span { color: var(--knowledge-muted); font-size: .78rem; line-height: 1.4; }
.knowledge-card > i { color: #b0b7c3; font-size: 1.15rem; }

.knowledge-empty { margin: 3rem auto; max-width: 18rem; text-align: center; color: var(--knowledge-muted); }
.knowledge-empty > i { width: 3.5rem; height: 3.5rem; display: grid; place-items: center; margin: 0 auto 1rem; border-radius: 50%; background: var(--knowledge-soft); color: #8791a3; }

.knowledge-article { color: #39465c; font-size: .91rem; line-height: 1.7; }
.knowledge-article h1 { margin: .45rem 0 1rem; color: var(--knowledge-ink); font-size: 1.5rem; line-height: 1.25; }
.knowledge-article h2 { margin: 1.65rem 0 .6rem; color: var(--knowledge-ink); font-size: 1.02rem; }
.knowledge-article p { margin-bottom: .8rem; }
.knowledge-article-meta { display: flex; gap: .45rem; flex-wrap: wrap; margin-bottom: 1rem; }
.knowledge-article-meta span { padding: .28rem .55rem; border-radius: 999px; background: var(--knowledge-accent-soft); color: var(--knowledge-accent); font-size: .68rem; font-weight: 650; }
.knowledge-article img, .knowledge-article video { max-width: 100%; height: auto; border-radius: .8rem; }
.knowledge-article figure { margin: 1rem 0; }
.knowledge-article figcaption { margin-top: .4rem; color: var(--knowledge-muted); font-size: .75rem; }

.knowledge-resource {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: .65rem;
  padding: .72rem .8rem;
  margin: .55rem 0;
  border: 1px solid var(--knowledge-line);
  border-radius: .7rem;
  background: var(--knowledge-soft);
  color: var(--knowledge-ink);
  font-size: .82rem;
  font-weight: 600;
}
.knowledge-resource:hover { color: var(--knowledge-accent); border-color: #cfd4ff; }
.knowledge-resource i { font-size: 1.05rem; color: #77839a; }

.knowledge-editor .card { border: 1px solid rgba(52, 71, 103, .06); box-shadow: 0 5px 18px rgba(52, 71, 103, .06); }
.knowledge-editor-content { line-height: 1.65; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: .86rem; }
.knowledge-editor-sidebar { position: sticky; top: 5.5rem; }
.knowledge-upload-zone { min-height: 9.5rem; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .35rem; padding: 1.5rem; border: 1.5px dashed #c9d0dc; border-radius: .9rem; background: #fafbfc; color: var(--knowledge-ink); cursor: pointer; text-align: center; transition: all .15s ease; }
.knowledge-upload-zone:hover { border-color: var(--knowledge-accent); background: var(--knowledge-accent-soft); }
.knowledge-upload-zone > i { font-size: 2.2rem; color: var(--knowledge-accent); }
.knowledge-upload-zone small { color: var(--knowledge-muted); }
.knowledge-asset-list { display: grid; gap: .55rem; }
.knowledge-asset-row { display: flex; align-items: center; gap: .75rem; padding: .7rem .8rem; border: 1px solid var(--knowledge-line); border-radius: .75rem; background: #fff; }
.knowledge-file-icon { width: 2.3rem; height: 2.3rem; display: grid; place-items: center; border-radius: .6rem; background: #edf3ff; color: #3b6cca; }
.knowledge-file-icon.is-new { background: #eaf8f1; color: #239867; }
.knowledge-advanced-fields summary { cursor: pointer; color: var(--knowledge-muted); font-size: .82rem; font-weight: 600; }
.knowledge-editor-actions { position: sticky; bottom: 0; z-index: 20; display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin: 0 -.5rem; padding: .9rem 1rem; border: 1px solid rgba(52, 71, 103, .1); border-radius: .9rem .9rem 0 0; background: rgba(255, 255, 255, .94); backdrop-filter: blur(12px); box-shadow: 0 -8px 30px rgba(52, 71, 103, .08); }

@media (max-width: 1199.98px) { .knowledge-editor-sidebar { position: static; } }
@media (max-width: 575.98px) {
  .knowledge-panel { width: 100vw; }
  .knowledge-editor-actions { align-items: stretch; }
  .knowledge-editor-actions > div:last-child { width: 100%; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { .knowledge-panel, .knowledge-card, .knowledge-header-button { transition: none; } }