/* =====================================================================
   MAX KNOWLEDGE GRAPH – /max/knowledge-graph/
   Dunkles Max-Layout (Teal-Akzent, dezente Violett/Cyan-Lichtstimmung).
   Namespace: .kg-page / kg-*. Keine externen Ressourcen.
   Phase 3: Suche, Kategorie-Filter, Tooltip, Detailpanel, Knoten-Drag.
   ===================================================================== */
:root{
  --kg-bg:      #07080b;
  --kg-fg:      rgba(255,255,255,.92);
  --kg-muted:   rgba(255,255,255,.72);
  --kg-faint:   rgba(255,255,255,.50);
  --kg-teal:    #12c5bc;
  --kg-violet:  #b39dff;
  --kg-cyan:    rgba(56,189,248,1);
  --kg-border:  rgba(255,255,255,.10);
  --kg-radius:  20px;
  --kg-radius-sm: 12px;
  --kg-maxw:    1180px;
}

*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }

body.kg-page{
  background:
    radial-gradient(1000px 640px at 50% 14%, rgba(18,197,188,.07), transparent 60%),
    radial-gradient(800px 560px at 82% 68%, rgba(179,157,255,.05), transparent 65%),
    radial-gradient(700px 500px at 12% 82%, rgba(56,189,248,.04), transparent 65%),
    var(--kg-bg);
  color:var(--kg-fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  min-height:100vh;
  display:flex; flex-direction:column;
  overflow-x:hidden;
}

.kg-main{
  flex:1; width:100%; max-width:var(--kg-maxw);
  margin:0 auto; padding:34px 20px 40px;
}

/* ── Hero ───────────────────────────────────────────────────── */
.kg-hero{ text-align:center; margin-bottom:26px; }
.kg-kicker{
  font-family:'Courier New', Courier, monospace;
  font-size:11px; letter-spacing:.22em; color:var(--kg-teal);
  margin-bottom:10px;
}
.kg-title{
  font-size:clamp(28px, 5.4vw, 46px); font-weight:800; letter-spacing:.05em;
  line-height:1.08;
  background:linear-gradient(100deg, #fff 20%, var(--kg-teal) 60%, var(--kg-violet) 95%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
  margin-bottom:10px;
}
.kg-sub{
  font-family:'Courier New', Courier, monospace;
  font-size:clamp(13px, 2vw, 15.5px); letter-spacing:.06em; color:var(--kg-muted);
  margin-bottom:14px;
}
.kg-intro{
  max-width:640px; margin:0 auto 20px;
  font-size:15px; line-height:1.65; color:var(--kg-muted);
}
.kg-stats{
  display:flex; justify-content:center; gap:12px; flex-wrap:wrap;
}
.kg-stat{
  display:flex; flex-direction:column; align-items:center; gap:2px;
  min-width:118px; padding:10px 16px;
  border:1px solid var(--kg-border); border-radius:var(--kg-radius-sm);
  background:rgba(255,255,255,.02);
}
.kg-stat-num{
  font-family:'Courier New', Courier, monospace;
  font-size:20px; font-weight:700; color:var(--kg-teal);
}
.kg-stat-label{
  font-family:'Courier New', Courier, monospace;
  font-size:10px; letter-spacing:.18em; color:var(--kg-faint);
}

/* ── Cockpit ────────────────────────────────────────────────── */
.kg-cockpit{
  border:1px solid var(--kg-border); border-radius:var(--kg-radius);
  background:rgba(255,255,255,.02);
  padding:14px;
}

/* ── Suche ──────────────────────────────────────────────────── */
.kg-search{
  display:flex; align-items:center; gap:10px; flex-wrap:wrap;
  margin-bottom:8px;
}
.kg-search-label{
  font-family:'Courier New', Courier, monospace;
  font-size:11px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--kg-faint);
}
.kg-search-box{
  position:relative; flex:1; min-width:220px; max-width:460px;
}
.kg-search-input{
  width:100%; height:38px; padding:0 38px 0 13px;
  font:14px/1 ui-sans-serif, system-ui, sans-serif;
  color:var(--kg-fg);
  background:rgba(255,255,255,.04);
  border:1px solid var(--kg-border); border-radius:10px;
  outline:none;
}
.kg-search-input::placeholder{ color:var(--kg-faint); }
.kg-search-input:focus-visible{ border-color:rgba(18,197,188,.6); box-shadow:0 0 0 1px rgba(18,197,188,.35); }
.kg-search-input::-webkit-search-cancel-button{ display:none; }
.kg-search-clear{
  position:absolute; right:5px; top:50%; transform:translateY(-50%);
  width:28px; height:28px;
  font:600 16px/1 ui-sans-serif, system-ui, sans-serif;
  color:var(--kg-muted);
  background:transparent; border:1px solid transparent; border-radius:8px;
  cursor:pointer;
}
.kg-search-clear:hover{ color:var(--kg-fg); background:rgba(255,255,255,.07); }
.kg-search-clear:focus-visible{ outline:2px solid var(--kg-teal); outline-offset:1px; }
.kg-search-count{
  font-family:'Courier New', Courier, monospace;
  font-size:11.5px; letter-spacing:.06em; color:var(--kg-faint);
  min-height:1em;
}

/* Trefferliste */
.kg-results{
  list-style:none; margin:0 0 10px; padding:6px;
  border:1px solid var(--kg-border); border-radius:var(--kg-radius-sm);
  background:rgba(10,12,17,.92);
  display:flex; flex-direction:column; gap:2px;
  max-height:300px; overflow-y:auto;
}
.kg-results[hidden]{ display:none; }
.kg-result-btn{
  display:flex; flex-direction:column; align-items:flex-start; gap:2px;
  width:100%; padding:8px 10px; text-align:left;
  background:transparent; border:1px solid transparent; border-radius:9px;
  color:var(--kg-fg); cursor:pointer;
  font:13.5px/1.35 ui-sans-serif, system-ui, sans-serif;
}
.kg-result-btn:hover{ background:rgba(18,197,188,.07); border-color:rgba(18,197,188,.3); }
.kg-result-btn:focus-visible{ outline:2px solid var(--kg-teal); outline-offset:-2px; }
.kg-result-title{ font-weight:600; }
.kg-result-meta{
  display:inline-flex; align-items:center; gap:6px;
  font-size:11.5px; color:var(--kg-faint);
}
.kg-result-dot{ width:8px; height:8px; border-radius:50%; flex-shrink:0; }
.kg-results-empty{
  padding:10px 12px; font-size:13px; color:var(--kg-muted);
}

/* ── Toolbar ────────────────────────────────────────────────── */
.kg-toolbar{
  display:flex; align-items:center; gap:8px; flex-wrap:wrap;
  margin-bottom:12px;
}
.kg-btn{
  min-width:40px; height:36px; padding:0 12px;
  font:600 16px/1 ui-sans-serif, system-ui, sans-serif;
  color:var(--kg-fg);
  background:rgba(255,255,255,.04);
  border:1px solid var(--kg-border); border-radius:10px;
  cursor:pointer;
  transition:border-color .15s ease, background .15s ease;
}
.kg-btn--text{ font-size:13px; letter-spacing:.02em; }
.kg-btn--small{ height:30px; font-size:12px; padding:0 10px; min-width:0; }
.kg-btn:hover{ border-color:rgba(18,197,188,.55); background:rgba(18,197,188,.08); }
.kg-btn:focus-visible{ outline:2px solid var(--kg-teal); outline-offset:2px; }
.kg-status{
  margin-left:auto;
  font-family:'Courier New', Courier, monospace;
  font-size:11.5px; letter-spacing:.08em; color:var(--kg-faint);
}
.kg-status--ok{ color:var(--kg-teal); }

/* ── Bühne / Canvas ─────────────────────────────────────────── */
.kg-stage{
  position:relative; width:100%;
  height:clamp(420px, 74vh, 760px);
  border:1px solid var(--kg-border); border-radius:var(--kg-radius-sm);
  background:
    radial-gradient(720px 460px at 50% 42%, rgba(18,197,188,.05), transparent 62%),
    #0a0c11;
  overflow:hidden;
}
#kgCanvas{
  display:block; width:100%; height:100%;
  cursor:grab; touch-action:none;
}
#kgCanvas.kg-dragging{ cursor:grabbing; }
#kgCanvas.kg-hovering{ cursor:pointer; }
#kgCanvas.kg-nodedrag{ cursor:grabbing; }
#kgCanvas:focus-visible{ outline:2px solid var(--kg-teal); outline-offset:-2px; }

.kg-loading{
  position:absolute; inset:0;
  display:flex; align-items:center; justify-content:center; gap:9px;
  font-family:'Courier New', Courier, monospace;
  font-size:13px; letter-spacing:.08em; color:var(--kg-muted);
  background:rgba(7,8,11,.5);
  pointer-events:none;
}
.kg-loading[hidden]{ display:none; }
.kg-loading-dot{ color:var(--kg-teal); animation:kg-pulse 1.2s ease-in-out infinite; }
@keyframes kg-pulse{ 0%,100%{ opacity:.35; } 50%{ opacity:1; } }

.kg-error{
  position:absolute; inset:0;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:8px;
  padding:24px; text-align:center;
  font-size:14px; line-height:1.5; color:var(--kg-fg);
  background:rgba(7,8,11,.82);
}
.kg-error[hidden]{ display:none; }
.kg-error strong{ color:#f87171; }
.kg-error span{ color:var(--kg-muted); max-width:420px; }

/* ── Hover-Tooltip ──────────────────────────────────────────── */
.kg-tip{
  position:absolute; z-index:4;
  display:flex; flex-direction:column; gap:3px;
  max-width:280px; padding:9px 12px;
  background:rgba(13,16,22,.96);
  border:1px solid rgba(18,197,188,.35); border-radius:10px;
  box-shadow:0 6px 22px rgba(0,0,0,.5);
  pointer-events:none;
  font-size:12.5px; line-height:1.4;
  opacity:0;
  transition:opacity .14s ease;
}
.kg-tip.kg-tip--show{ opacity:1; }
.kg-tip[hidden]{ display:none; }
.kg-tip-title{ color:var(--kg-fg); font-size:13px; }
.kg-tip-cat{ display:inline-flex; align-items:center; gap:6px; color:var(--kg-muted); }
.kg-tip-dot{ width:8px; height:8px; border-radius:50%; flex-shrink:0; }
.kg-tip-src{ color:var(--kg-faint); font-size:11.5px; }
.kg-tip-hint{
  margin-top:2px;
  font-family:'Courier New', Courier, monospace;
  font-size:10.5px; letter-spacing:.08em; color:var(--kg-teal);
}

/* ── Detailpanel ────────────────────────────────────────────── */
.kg-panel{
  position:absolute; z-index:5;
  top:12px; right:12px; bottom:12px;
  width:min(320px, calc(100% - 24px));
  overflow-y:auto;
  padding:16px 16px 18px;
  background:rgba(11,14,19,.96);
  border:1px solid rgba(18,197,188,.3); border-radius:var(--kg-radius-sm);
  box-shadow:0 10px 34px rgba(0,0,0,.55);
}
.kg-panel[hidden]{ display:none; }
.kg-panel:focus-visible{ outline:2px solid var(--kg-teal); outline-offset:-2px; }
.kg-panel-close{
  position:absolute; top:8px; right:8px;
  width:32px; height:32px;
  font:600 17px/1 ui-sans-serif, system-ui, sans-serif;
  color:var(--kg-muted);
  background:rgba(255,255,255,.04);
  border:1px solid var(--kg-border); border-radius:9px;
  cursor:pointer;
}
.kg-panel-close:hover{ color:var(--kg-fg); border-color:rgba(18,197,188,.55); }
.kg-panel-close:focus-visible{ outline:2px solid var(--kg-teal); outline-offset:2px; }
.kg-panel-cat{
  display:flex; align-items:center; gap:7px;
  font-family:'Courier New', Courier, monospace;
  font-size:10.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--kg-muted);
  margin-bottom:8px; padding-right:36px;
}
.kg-panel-dot{ width:9px; height:9px; border-radius:50%; flex-shrink:0; box-shadow:0 0 7px currentColor; }
.kg-panel-title{
  font-size:16.5px; font-weight:700; line-height:1.3;
  color:var(--kg-fg); margin-bottom:6px;
}
.kg-panel-src{ font-size:12.5px; color:var(--kg-faint); margin-bottom:10px; }
.kg-panel-preview{
  font-size:13.5px; line-height:1.55; color:var(--kg-muted);
  margin-bottom:12px;
}
.kg-panel-link{
  display:inline-block; margin-bottom:16px;
  font-size:13.5px; font-weight:600; color:var(--kg-teal);
  text-decoration:none;
  border-bottom:1px solid rgba(18,197,188,.4);
  padding-bottom:1px;
}
.kg-panel-link:hover{ border-bottom-color:var(--kg-teal); }
.kg-panel-link:focus-visible{ outline:2px solid var(--kg-teal); outline-offset:3px; }
.kg-panel-related-head{
  font-family:'Courier New', Courier, monospace;
  font-size:10.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--kg-faint); margin-bottom:7px;
}
.kg-panel-related{ list-style:none; display:flex; flex-direction:column; gap:5px; }
.kg-related-btn{
  display:flex; flex-direction:column; align-items:flex-start; gap:2px;
  width:100%; padding:8px 10px; text-align:left;
  background:rgba(255,255,255,.03);
  border:1px solid var(--kg-border); border-radius:9px;
  color:var(--kg-fg); cursor:pointer;
  font:12.5px/1.35 ui-sans-serif, system-ui, sans-serif;
}
.kg-related-btn:hover{ border-color:rgba(18,197,188,.5); background:rgba(18,197,188,.06); }
.kg-related-btn:focus-visible{ outline:2px solid var(--kg-teal); outline-offset:-2px; }
.kg-related-title{ font-weight:600; }
.kg-related-meta{
  display:inline-flex; align-items:center; gap:6px;
  font-size:11px; color:var(--kg-faint);
}
.kg-related-dot{ width:7px; height:7px; border-radius:50%; flex-shrink:0; }

/* ── Bedienhinweis ──────────────────────────────────────────
   Muss bei jeder Breite vollständig lesbar bleiben: keine festen
   Mindestbreiten, sauberer Umbruch, unter 700px kurze Variante. */
.kg-hint{
  margin:10px auto 0; padding:0 8px;
  max-width:100%;
  font-family:'Courier New', Courier, monospace;
  font-size:11px; letter-spacing:.06em; color:var(--kg-faint);
  text-align:center;
  overflow-wrap:break-word;
}
.kg-hint-long, .kg-hint-short{ white-space:normal; }
.kg-hint-short{ display:none; }
@media (max-width:700px){
  .kg-hint-long{ display:none; }
  .kg-hint-short{ display:inline; }
}

/* ── Legende = Kategorie-Filter ─────────────────────────────── */
.kg-legendwrap{ margin-top:14px; padding-top:14px; border-top:1px solid var(--kg-border); }
.kg-legend-toggle{ display:none; margin-bottom:10px; }
.kg-legend-actions{
  display:flex; justify-content:center; gap:8px; flex-wrap:wrap;
  margin-bottom:10px;
}
.kg-legend{
  display:flex; flex-wrap:wrap; justify-content:center;
  gap:6px 8px;
}
.kg-legend-item{
  display:inline-flex; align-items:center; gap:7px;
  font:12.5px/1 ui-sans-serif, system-ui, sans-serif;
  color:var(--kg-muted);
  padding:6px 11px;
  background:rgba(255,255,255,.02);
  border:1px solid var(--kg-border); border-radius:999px;
  cursor:pointer;
  transition:border-color .15s ease, background .15s ease, opacity .15s ease;
}
.kg-legend-item:hover{ border-color:rgba(18,197,188,.5); }
.kg-legend-item:focus-visible{ outline:2px solid var(--kg-teal); outline-offset:2px; }
.kg-legend-dot{
  width:10px; height:10px; border-radius:50%; flex-shrink:0;
  box-shadow:0 0 6px currentColor;
}
.kg-legend-count{ color:var(--kg-faint); font-size:11.5px; }
.kg-legend-item--muted{ color:var(--kg-faint); }
.kg-legend-item--muted .kg-legend-dot{ box-shadow:none; opacity:.8; }
/* deaktivierte Kategorie: klar erkennbar, aber lesbar */
.kg-legend-item[aria-pressed="false"]{
  opacity:.55; border-style:dashed;
}
.kg-legend-item[aria-pressed="false"] .kg-legend-dot{
  box-shadow:none; opacity:.4;
}
.kg-legend-item[aria-pressed="false"]::after{
  content:"aus";
  font-family:'Courier New', Courier, monospace;
  font-size:9.5px; letter-spacing:.08em; color:var(--kg-faint);
}

/* ── Fuß ────────────────────────────────────────────────────── */
.kg-foot{
  padding:18px 20px 22px; text-align:center;
  font-family:'Courier New', Courier, monospace;
  font-size:11px; letter-spacing:.08em; color:var(--kg-faint);
  border-top:1px solid var(--kg-border);
}

/* ── Screenreader-only ──────────────────────────────────────── */
.kg-visually-hidden{
  position:absolute!important; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0;
}

/* ── Mobil ──────────────────────────────────────────────────── */
@media (max-width:640px){
  .kg-main{ padding:22px 12px 28px; }
  .kg-cockpit{ padding:10px; }
  .kg-stage{ height:clamp(360px, 62vh, 560px); }
  .kg-stat{ min-width:96px; padding:8px 10px; }
  .kg-stat-num{ font-size:17px; }
  .kg-status{ width:100%; margin-left:0; order:5; }
  .kg-search-box{ min-width:0; max-width:none; }
  .kg-results{ max-height:250px; }

  /* Detailpanel als Bottom-Sheet über dem unteren Canvasbereich */
  .kg-panel{
    top:auto; right:8px; bottom:8px; left:8px;
    width:auto; max-height:52%;
    padding:14px 14px 16px;
  }
  .kg-panel-title{ font-size:15px; }

  /* Legende aufklappbar */
  .kg-legend-toggle{ display:inline-block; }
  .kg-legendwrap:not(.kg-legendwrap--open) .kg-legend-body{ display:none; }
  .kg-legend{ gap:5px 6px; }
  .kg-legend-item{ font-size:11.5px; padding:7px 10px; }

  /* Touch-Flächen */
  .kg-btn{ height:40px; }
  .kg-panel-close{ width:38px; height:38px; }
}

/* ── Reduced Motion ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important; animation-iteration-count:1!important;
    transition-duration:.01ms!important;
  }
  .kg-loading-dot{ animation:none; }
}