/* ===========================================================================
   BILLY UI — gemeinsames Design-System für die gesamte Anwendung
   ---------------------------------------------------------------------------
   Eine Identität für alle Seiten: dunkles Panel-Layout, Gold-Stern als Marke,
   linke Billy-Rail (rollen-gefilterte Navigation), schlanke Topbar, gemeinsame
   Komponenten (Karten, Tabellen, Pills, Formulare). Geladen von
   assets/billy-shell.js auf jeder Seite; bestehende Seiten-Styles bleiben
   gültig, das Shell legt sich als Rahmen darum.
   ========================================================================= */
:root {
  --bg: #0B1220; --panel: #121B2E; --panel2: #0E1626; --line: #22304C;
  --ink: #E8EDF7; --dim: #8FA0BC; --gold: #E8B44C; --gold-ink: #1A1204;
  --cyan: #37C8E8; --ok: #39D98A; --warn: #E8B44C; --danger: #F06B6B;
  --rail-w: 232px; --top-h: 52px;
  --font: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ---- Shell-Rahmen ---------------------------------------------------------
   Das Shell verschiebt den Seiteninhalt nach rechts/unten; Alt-Header der
   Einzelseiten werden ausgeblendet (Topbar übernimmt Titel + Kontext). */
html.billy-shell body { margin: 0; background: var(--bg); }
html.billy-shell body > header.billy-legacy-header { display: none !important; }
html.billy-shell body { padding-left: var(--rail-w); padding-top: var(--top-h); box-sizing: border-box; }
@media (max-width: 860px) { html.billy-shell body { padding-left: 0; } }

/* ---- Billy-Rail (Navigation) --------------------------------------------- */
.billy-rail {
  position: fixed; z-index: 900; inset: 0 auto 0 0; width: var(--rail-w);
  background: linear-gradient(180deg, #0D1526 0%, #0A101D 100%);
  border-right: 1px solid var(--line); color: var(--ink);
  font: 14px/1.45 var(--font); display: flex; flex-direction: column;
}
.billy-rail .brand { display: flex; align-items: center; gap: 10px; padding: 14px 16px 12px; border-bottom: 1px solid var(--line); }
.billy-star { width: 26px; height: 26px; flex: 0 0 26px; background: var(--gold);
  clip-path: polygon(50% 0, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%); }
.billy-rail .brand b { font-size: 15px; letter-spacing: .2px; }
.billy-rail .brand small { display: block; color: var(--dim); font-size: 11px; font-weight: 400; }
.billy-rail nav { flex: 1; overflow-y: auto; padding: 8px 8px 12px; }
.billy-rail .grp { margin: 12px 8px 4px; font-size: 10.5px; text-transform: uppercase; letter-spacing: .8px; color: var(--dim); }
.billy-rail a.item { display: flex; align-items: center; gap: 10px; padding: 8px 10px; margin: 1px 2px;
  color: var(--ink); text-decoration: none; border-radius: 9px; border: 1px solid transparent; }
.billy-rail a.item .ic { width: 20px; text-align: center; color: var(--dim); font-size: 13px; }
.billy-rail a.item:hover { background: var(--panel2); border-color: var(--line); }
.billy-rail a.item.active { background: rgba(232, 180, 76, .10); border-color: rgba(232, 180, 76, .35); }
.billy-rail a.item.active .ic { color: var(--gold); }
.billy-rail a.item.billy-entry { background: rgba(232, 180, 76, .08); border-color: rgba(232, 180, 76, .25); }
.billy-rail a.item.billy-entry .ic { color: var(--gold); }
.billy-rail .foot { border-top: 1px solid var(--line); padding: 10px 12px; font-size: 12px; color: var(--dim); }
.billy-rail .foot .who { color: var(--ink); font-weight: 600; }
.billy-rail .foot button { margin-top: 6px; }
@media (max-width: 860px) {
  .billy-rail { transform: translateX(-100%); transition: transform .18s ease; }
  html.billy-rail-open .billy-rail { transform: none; box-shadow: 0 0 0 100vmax rgba(0,0,0,.45); }
}

/* ---- Topbar ---------------------------------------------------------------- */
.billy-top {
  position: fixed; z-index: 890; top: 0; left: var(--rail-w); right: 0; height: var(--top-h);
  display: flex; align-items: center; gap: 12px; padding: 0 16px; box-sizing: border-box;
  background: rgba(11, 18, 32, .92); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line); color: var(--ink); font: 14px var(--font);
}
@media (max-width: 860px) { .billy-top { left: 0; } }
.billy-top .burger { display: none; }
@media (max-width: 860px) { .billy-top .burger { display: inline-flex; } }
.billy-top .title { font-weight: 650; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.billy-top .crumb { color: var(--dim); font-size: 12px; }
.billy-top .spacer { flex: 1; }
.billy-top .badge-demo { font-size: 11px; font-weight: 700; color: var(--gold-ink); background: var(--gold); border-radius: 20px; padding: 3px 9px; }

/* ---- Gemeinsame Komponenten ------------------------------------------------ */
.billy-btn { appearance: none; font: 12.5px var(--font); padding: 7px 11px; border: 1px solid var(--line);
  border-radius: 9px; background: var(--panel2); color: var(--ink); cursor: pointer; }
.billy-btn:hover { border-color: #33456B; }
.billy-btn.primary { background: var(--gold); color: var(--gold-ink); border-color: var(--gold); font-weight: 650; }
.billy-btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 1px; }
.billy-pill { display: inline-block; padding: 2px 9px; border-radius: 20px; font: 600 11px var(--font); }
.billy-pill.ok { background: rgba(57,217,138,.15); color: var(--ok); }
.billy-pill.warn { background: rgba(232,180,76,.15); color: var(--warn); }
.billy-pill.err { background: rgba(240,107,107,.15); color: var(--danger); }
.billy-pill.dim { background: rgba(143,160,188,.15); color: var(--dim); }

/* ---- Login-Overlay (PIN) ---------------------------------------------------- */
.billy-login { position: fixed; inset: 0; z-index: 990; display: flex; align-items: center; justify-content: center;
  background: rgba(7, 11, 20, .82); backdrop-filter: blur(4px); font: 14px var(--font); }
.billy-login .card { width: min(360px, 92vw); background: var(--panel); border: 1px solid var(--line);
  border-radius: 16px; padding: 26px 24px; color: var(--ink); text-align: center; }
.billy-login .billy-star { width: 40px; height: 40px; margin: 0 auto 10px; }
.billy-login h2 { margin: 0 0 2px; font-size: 18px; }
.billy-login p { margin: 0 0 16px; color: var(--dim); font-size: 12.5px; }
.billy-login input { width: 100%; box-sizing: border-box; text-align: center; letter-spacing: 6px;
  font: 22px var(--mono); background: var(--panel2); color: var(--ink); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 10px; margin-bottom: 10px; }
.billy-login .err { color: var(--danger); font-size: 12.5px; min-height: 16px; margin-bottom: 6px; }

/* ---- Kasse (POS-Modus): schwebender Billy-Stern ----------------------------- */
.billy-fab { position: fixed; z-index: 930; display: flex; align-items: center; justify-content: center;
  right: 12px; bottom: calc(134px + env(safe-area-inset-bottom, 0px)); /* über Checkout-/Tab-Leiste der Kasse */
  width: 46px; height: 46px; padding: 0;
  background: var(--panel); border: 1px solid rgba(232,180,76,.45); border-radius: 50%;
  color: var(--ink); font: 600 13px var(--font); text-decoration: none; box-shadow: 0 6px 24px rgba(0,0,0,.45); }
.billy-fab .billy-star ~ span { display: none; }   /* im POS nur der Stern, Text via title */
.billy-fab .billy-star { width: 22px; height: 22px; }
.billy-fab:hover { border-color: var(--gold); }

@media (prefers-reduced-motion: reduce) { .billy-rail, .billy-top { transition: none !important; } }