/* ============================================================================
   ARENA — der begehbare Flur (HUD über dem 3D-Canvas)
   Farbwelt: tiefes Blau-Schwarz, Neon-Blau/Cyan-Holo, Magenta-Lichtleisten.
   ============================================================================ */
:root{
  --holo:#4fb3ff; --holo-2:#7ee0ff; --holo-ink:#e9f6ff;
  --holo-bg:rgba(12,28,64,.58); --holo-bg-2:rgba(8,18,44,.78);
  --neon-magenta:#b06bff; --neon-green:#3dff8a; --neon-grey:#8a94a8;
}
#arena{ position:fixed; inset:0; z-index:var(--z-scene); background:#05070f; overflow:hidden; }
#arenaCanvas{ position:absolute; inset:0; width:100%; height:100%; display:block; touch-action:none; }
.arena-hud{ position:absolute; inset:0; pointer-events:none; }
.arena-hud > *{ pointer-events:auto; }

/* Holo-Grundoptik: leicht flimmernde Glasscheibe mit Neon-Rand */
.holo-panel, .arena-sign, .arena-search, .arena-list, .arena-status, .arena-toast{
  background:linear-gradient(180deg, var(--holo-bg), var(--holo-bg-2));
  border:1.5px solid var(--holo);
  border-radius:14px;
  box-shadow:0 0 18px rgba(79,179,255,.45), inset 0 0 22px rgba(79,179,255,.12), 0 18px 50px rgba(0,0,0,.55);
  backdrop-filter:blur(10px) saturate(1.2); -webkit-backdrop-filter:blur(10px) saturate(1.2);
  color:var(--holo-ink);
  animation:holoFlicker 6s infinite;
}
@keyframes holoFlicker{
  0%,100%{ opacity:1 } 3%{ opacity:.94 } 4%{ opacity:1 } 47%{ opacity:1 } 48%{ opacity:.9 } 49%{ opacity:1 } 80%{opacity:.97}
}

.arena-top{
  position:absolute; left:0; right:0; top:0; display:flex; align-items:center; gap:12px;
  padding:14px 18px; background:linear-gradient(#05070fee, #05070f00); z-index:3;
}
.arena-brand{ display:flex; align-items:baseline; gap:10px; }
.arena-brand b{ font-size:19px; letter-spacing:.4px; color:#fff; }
.arena-brand b span{ color:var(--holo-2); }
.arena-brand em{ font-style:normal; font-family:var(--font-mono); font-size:11px; letter-spacing:2.5px; text-transform:uppercase; color:var(--ink-3); }
.arena-top .spacer{ flex:1; }
.btn-sm{ padding:7px 13px; font-size:13px; }
.arena-toggle{ display:inline-flex; align-items:center; gap:7px; font-size:13px; color:var(--ink-2); cursor:pointer; user-select:none; }
.arena-toggle input{ accent-color:var(--holo); }

/* Schwebendes Schild „Neues Projekt erstellen" */
.arena-sign{
  position:absolute; left:18px; top:76px; padding:14px 20px; display:flex; align-items:center; gap:12px;
  font-weight:600; font-size:15px; cursor:pointer; transform:perspective(600px) rotateY(9deg);
  transition:transform .25s, box-shadow .25s; user-select:none; z-index:3;
}
.arena-sign .plus{ font-size:22px; color:var(--neon-green); text-shadow:0 0 12px var(--neon-green); }
.arena-sign:hover, .arena-sign:focus-visible{ transform:perspective(600px) rotateY(0deg) translateY(-2px); box-shadow:0 0 30px rgba(79,179,255,.7), 0 18px 50px rgba(0,0,0,.6); outline:none; }

/* Statuszeile (Räume · Raumleiter · Honcho) */
.arena-status{
  position:absolute; left:18px; bottom:18px; padding:9px 14px; font-family:var(--font-mono); font-size:11.5px;
  letter-spacing:.04em; color:#bfe4ff; display:flex; gap:14px; flex-wrap:wrap; max-width:min(560px, 60vw); z-index:3;
}
.arena-status .dot{ display:inline-block; width:8px; height:8px; border-radius:50%; margin-right:6px; background:var(--neon-grey); box-shadow:0 0 8px currentColor; vertical-align:middle; }
.arena-status .dot.on{ background:var(--neon-green); color:var(--neon-green); }
.arena-status .dot.off{ background:#ff6b6b; color:#ff6b6b; }
.arena-status .dot.warn{ background:var(--warn); color:var(--warn); }

/* Suche (Ecke unten rechts, wie im Entwurf) */
.arena-search{
  position:absolute; right:22px; bottom:22px; width:min(520px, 62vw); padding:10px 16px; display:flex; align-items:center; gap:12px;
  transform:perspective(900px) rotateY(-10deg); z-index:3;
}
.arena-search .lupe{ font-size:26px; color:var(--holo-2); text-shadow:0 0 12px var(--holo); }
.arena-search input{
  flex:1; background:transparent; border:0; outline:0; color:#fff; font:500 22px var(--font-ui); letter-spacing:.01em; min-width:0;
}
.arena-search input::placeholder{ color:#9fd2ff; opacity:.85; }
.arena-search input::-webkit-search-cancel-button{ filter:invert(1); }

/* Liste rechts */
.arena-list{
  position:absolute; right:22px; top:76px; width:min(360px, 88vw); max-height:calc(100vh - 220px); overflow:auto; padding:10px; z-index:4;
}
.arena-list .h{ font-family:var(--font-mono); font-size:11px; letter-spacing:.2em; text-transform:uppercase; color:#9fd2ff; padding:6px 8px 8px; }
.arena-list .row-r{
  display:grid; grid-template-columns:14px 1fr auto; gap:10px; align-items:center; padding:9px 10px; border-radius:10px; cursor:pointer;
  border:1px solid transparent; transition:background .15s, border-color .15s;
}
.arena-list .row-r:hover{ background:rgba(79,179,255,.12); border-color:rgba(79,179,255,.35); }
.arena-list .row-r .dot{ width:10px; height:10px; border-radius:50%; background:var(--neon-grey); box-shadow:0 0 8px currentColor; }
.arena-list .row-r .dot.aktiv{ background:var(--neon-green); color:var(--neon-green); }
.arena-list .row-r .dot.fest{ background:var(--gold); color:var(--gold); }
.arena-list .row-r .dot.wartet{ background:var(--warn); color:var(--warn); animation:pulseDot 1.2s infinite; }
@keyframes pulseDot{ 50%{ opacity:.35 } }
.arena-list .row-r .t{ font-weight:600; font-size:14px; color:#fff; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.arena-list .row-r .m{ font-family:var(--font-mono); font-size:10.5px; color:#9fd2ff; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.arena-list .row-r .go{ font-size:12px; color:var(--holo-2); border:1px solid rgba(79,179,255,.5); border-radius:999px; padding:3px 9px; }
.arena-list .row-r .go:hover{ background:rgba(79,179,255,.2); }
.arena-list .leer{ padding:14px; color:#9fd2ff; font-size:13px; }

.arena-tip{
  position:absolute; left:50%; bottom:26px; transform:translateX(-50%); font-family:var(--font-mono); font-size:11px; letter-spacing:.06em;
  color:#7fb6e6; opacity:.85; text-align:center; pointer-events:none; text-shadow:0 2px 12px #000; z-index:2;
}
.arena-toast{
  position:absolute; left:50%; top:86px; transform:translateX(-50%) translateY(-10px); padding:10px 16px; font-size:14px; opacity:0;
  transition:opacity .25s, transform .25s; z-index:6; max-width:min(560px, 90vw); text-align:center;
}
.arena-toast{ animation:none; }
.arena-toast.show{ opacity:1; transform:translateX(-50%) translateY(0); }
.arena-toast.bad{ border-color:#ff6b6b; box-shadow:0 0 18px rgba(255,107,107,.45); }

/* Mobil: Schild kleiner, Suche über die volle Breite, Tipp weg */
@media (max-width:760px){
  .arena-top{ padding:10px 12px; gap:8px; flex-wrap:wrap; }
  .arena-brand em{ display:none; }
  .arena-sign{ left:12px; top:64px; padding:10px 14px; font-size:13px; transform:none; }
  .arena-search{ left:12px; right:12px; width:auto; bottom:14px; transform:none; padding:8px 12px; }
  .arena-search input{ font-size:18px; }
  .arena-status{ left:12px; bottom:76px; max-width:calc(100vw - 24px); font-size:10.5px; gap:10px; }
  .arena-list{ right:12px; left:12px; width:auto; top:64px; max-height:50vh; }
  .arena-tip{ display:none; }
}