:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --line: #e2e7ee;
  --ink: #1f2630;
  --muted: #7a8696;
  --accent: #1a8cff;
  --accent-ink: #ffffff;
  --ok: #18a558;
  --no: #d8443a;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  /* Touch/iPad: kein Gummiband-Scrollen, keine Doppeltipp-Zoom-Verzoegerung */
  overscroll-behavior: none;
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
}
/* Bedienelemente reagieren ohne 300ms-Verzoegerung; keine Textauswahl beim Tippen */
.btn, .swatch, .lang-select, select, label { touch-action: manipulation; }
#toolbar, .group, .seg, .menu-pop { -webkit-user-select: none; user-select: none; }

/* Toolbar — zweizeilig */
#toolbar {
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 0;
  padding: 0;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
  z-index: 10;
}

/* Hauptzeile: scrollbarer linker Teil + fixierter rechter Teil */
#toolbar-main { display: flex; align-items: stretch; }

#toolbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  flex: 1 1 0;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
#toolbar-left::-webkit-scrollbar { display: none; }

#toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  flex-shrink: 0;
  border-left: 1px solid var(--line);
  position: relative; /* Anker für Hamburger-Dropdown */
}

/* Desktop: inner = normaler Inline-Flex-Container */
#toolbar-right-inner {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Icon-Gruppe: Desktop = inline Flex-Row (fügt sich nahtlos ein) */
.toolbar-icon-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Hamburger: nur auf Mobile sichtbar */
#btn-hamburger { display: none; }

/* Kontextzeile: Bauteil-Auswahl + Farbe */
#toolbar-ctx {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-top: 1px solid var(--line);
  background: #f7f9fc;
  /* Kein overflow hier — nur #grp-build scrollt intern */
}
/* Bauteil-Gruppe nimmt alle verfügbare Breite und scrollt intern. */
#toolbar-ctx #grp-build {
  flex: 1 1 0;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
#toolbar-ctx #grp-build::-webkit-scrollbar { display: none; }
/* Kein Umbruch in der Bauteil-Gruppe */
#toolbar-ctx .part-row { flex-wrap: nowrap; }
/* Farbe-Gruppe und alle anderen ctx-Kinder nicht schrumpfen */
#toolbar-ctx .group { flex-shrink: 0; }

.brand { font-weight: 800; letter-spacing: 0.5px; font-size: 18px; white-space: nowrap; }
.brand span { color: var(--accent); font-weight: 700; }
.group { display: flex; align-items: center; gap: 6px; }
.group > label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.4px; white-space: nowrap; }

/* Senkrechter Trenner zwischen Toolbar-Bereichen */
.divider { width: 1px; align-self: stretch; background: var(--line); margin: 2px 2px; flex-shrink: 0; }

/* Autosave-Anzeige als kleiner Statuspunkt (jetzt im Entwürfe-Button) */
.save-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--ok); border: 1px solid #cdeedd;
  box-shadow: 0 0 0 2px #e9f7ef;
  flex: 0 0 auto; transition: background 0.2s ease, box-shadow 0.2s ease;
}
.save-dot.saving { background: var(--accent); box-shadow: 0 0 0 2px #e8f1ff; }


/* Bauteil-Leiste (Rohre + Platten gemeinsam) */
.part-row { display: inline-flex; gap: 4px; flex-wrap: wrap; align-items: center; }
.mini-divider { width: 1px; height: 20px; background: var(--line); margin: 0 4px; }
.btn.part {
  display: inline-flex; flex-direction: column; align-items: center; gap: 1px;
  padding: 4px 7px; min-width: 36px; line-height: 1.1;
}
.btn.part svg { display: block; }
.btn.part span { font-size: 11px; font-variant-numeric: tabular-nums; }

/* Aktive Bauteil-Buttons: in der gewählten Baufarbe einfärben */
.btn.part[data-tube].active,
.btn.part[data-panel].active {
  background: var(--part-bg, var(--accent));
  border-color: var(--part-bg, var(--accent));
  color: var(--part-ink, var(--accent-ink));
  box-shadow: none;
}

/* Löschen-Button: pinned rechts in toolbar-ctx, rot wenn aktiv */
.delete-part { flex-shrink: 0; }
.delete-part.active {
  background: var(--no);
  border-color: var(--no);
  color: #fff;
  box-shadow: none;
}

/* Disabled-Zustand für Part-Buttons (z. B. Undo wenn leer) */
.btn.part:disabled { opacity: 0.38; cursor: default; }
.btn.part:disabled:hover { border-color: var(--line); background: #fff; }

/* Farb-Auswahl-Popup (erscheint beim 2. Klick auf aktiven Part-Button) */
.color-popup {
  display: flex;
  gap: 7px;
  padding: 8px 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
  z-index: 200;
}
.btn.icon-btn { display: inline-flex; align-items: center; gap: 5px; }
.btn.icon-btn svg { display: block; }

/* Segmentierte Modus-Gruppe */
.group.seg { gap: 0; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.group.seg .btn { border: none; border-radius: 0; border-right: 1px solid var(--line); }
.group.seg .btn:last-child { border-right: none; }
.group.seg .btn.active { box-shadow: none; }

/* Dropdown-Menue (Entwuerfe/Datei) */
.menu { position: relative; }
.menu-pop {
  position: absolute; right: 0; top: calc(100% + 6px);
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.16);
  padding: 10px; width: 260px;
  max-width: min(260px, calc(100vw - 28px));
  z-index: 100;
  display: flex; flex-direction: column; gap: 8px;
}
/* Entwürfe-Menü: breiter, damit lange Dateinamen lesbar bleiben */
#file-pop {
  width: min(380px, calc(100vw - 28px));
}
#file-pop select { max-width: none; }
.menu-section { display: flex; flex-direction: column; gap: 6px; }
.menu-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); }
.menu-row { display: flex; gap: 6px; align-items: center; }
.menu-row select { flex: 1; max-width: none; }
.menu-row .menu-label { white-space: nowrap; }
.menu-sep { border: none; border-top: 1px solid var(--line); margin: 2px 0; }
.btn.full { width: 100%; justify-content: center; }
.menu-row .btn.full { flex: 1; }
.menu-item { text-align: left; justify-content: flex-start; }
.btn.danger { color: var(--no); }
.btn.danger:hover { border-color: var(--no); background: #fdeceb; }
.menu-pop hr, .menu-section + .btn { margin-top: 2px; }
/* Quadratische Icon-Buttons */
.btn.icon-sq { padding: 6px 8px; min-width: 32px; display: inline-flex; align-items: center; justify-content: center; }

.btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 7px 13px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.12s ease;
}
.btn:hover { border-color: #c4ccd6; }
.btn.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.ghost { padding: 7px 11px; color: #45505f; }
.lang-btn { font-weight: 600; letter-spacing: 0.04em; min-width: 2.8em; }
.lang-select {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 6px 8px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.12s ease;
  font-family: inherit;
}
.lang-select:hover { border-color: #c4ccd6; }
.lang-select:focus { outline: none; border-color: var(--accent); }

select {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 9px;
  font-size: 14px;
  background: #fff;
  color: var(--ink);
  max-width: 200px;
}

.swatches { display: flex; gap: 5px; }
.swatch {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 2px solid #fff;
  outline: 1px solid var(--line);
  cursor: pointer;
  padding: 0;
}
.swatch.active { outline: 2px solid var(--ink); transform: scale(1.08); }

/* Main */
:root { --sidebar-w: 320px; }
main { flex: 1; display: flex; min-height: 0; }
#canvas-wrap { position: relative; flex: 1; min-width: 0; }
#canvas { position: absolute; inset: 0; touch-action: none; }
#canvas canvas { display: block; touch-action: none; }

/* Floating Canvas-Buttons (Tastenkürzel, ggf. weitere) */
.canvas-btn {
  position: absolute;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(0, 0, 0, 0.13);
  border-radius: 8px;
  cursor: pointer;
  padding: 7px 10px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
  color: var(--ink);
  z-index: 10;
  transition: transform 0.1s ease, box-shadow 0.15s ease, background 0.12s ease;
}
.canvas-btn:hover { background: #fff; transform: scale(1.06); box-shadow: 0 4px 14px rgba(0,0,0,0.22); }
.canvas-btn:active { transform: scale(0.94); }
#btn-help { bottom: 12px; right: 12px; }

/* Szene-Toggle-Icon: Kreis links oben im 3D-Viewport */
.scene-icon {
  position: absolute; top: 12px; left: 12px; z-index: 10;
  width: 48px; height: 48px; padding: 0; border: none;
  border-radius: 50%; overflow: hidden; cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.30);
  transition: filter 0.25s, opacity 0.25s, box-shadow 0.2s, transform 0.1s;
  outline: 2px solid rgba(255,255,255,0.55);
  outline-offset: 1px;
}
.scene-icon:hover { transform: scale(1.08); box-shadow: 0 4px 14px rgba(0,0,0,0.35); }
.scene-icon:active { transform: scale(0.96); }
.scene-icon.off { filter: grayscale(1); opacity: 0.45; outline-color: rgba(0,0,0,0.15); }
body.resizing { cursor: col-resize; user-select: none; }

/* Ziehgriff zwischen Canvas und Seitenleiste */
#sidebar-resizer {
  width: 6px; flex: 0 0 6px; cursor: col-resize;
  background: var(--line); opacity: 0.35;
  transition: opacity 0.15s ease;
}
#sidebar-resizer:hover, body.resizing #sidebar-resizer { opacity: 1; background: var(--accent); }
body.sidebar-hidden #sidebar, body.sidebar-hidden #sidebar-resizer { display: none; }

.status {
  position: absolute;
  left: 12px; bottom: 12px;
  background: rgba(31, 38, 48, 0.82);
  color: #fff;
  padding: 7px 12px;
  border-radius: 8px;
  font-size: 13px;
  max-width: 70%;
  pointer-events: none;
}

/* Sidebar */
#sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--panel);
  border-left: 1px solid var(--line);
  overflow-y: auto;
  padding: 14px;
}
.panel { margin-bottom: 22px; }
.panel h2 { font-size: 15px; margin: 0 0 10px; }
.panel h3 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px;
  color: var(--muted); margin: 14px 0 6px;
}

.bom-list { display: flex; flex-direction: column; gap: 3px; }
.bom-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 5px 6px;
  border-radius: 6px;
  font-size: 13px;
}
.bom-row:nth-child(odd) { background: #f7f9fc; }
.bom-row.muted { color: var(--muted); }
.bom-name { display: flex; align-items: center; gap: 7px; }
.bom-count { font-variant-numeric: tabular-nums; color: var(--muted); }
.bom-sub { font-variant-numeric: tabular-nums; min-width: 56px; text-align: right; }
.dot { width: 11px; height: 11px; border-radius: 50%; outline: 1px solid rgba(0,0,0,0.12); flex-shrink: 0; }
.muted { color: var(--muted); font-size: 13px; padding: 4px 6px; }

.totals {
  margin-top: 12px; padding-top: 10px;
  border-top: 1px dashed var(--line);
  display: flex; flex-direction: column; gap: 5px;
}
.totals div { display: flex; justify-content: space-between; font-size: 13px; }
.totals span { color: var(--muted); }
.totals strong { font-variant-numeric: tabular-nums; }

/* Inventory */
.feasibility {
  font-size: 13px; font-weight: 600;
  padding: 8px 10px; border-radius: 8px; margin-bottom: 10px;
  min-height: 0;
}
.feasibility:empty { display: none; }
.feasibility.ok { background: #e6f7ee; color: var(--ok); }
.feasibility.no { background: #fdeceb; color: var(--no); }

.inv-list { display: flex; flex-direction: column; gap: 4px; }
.inv-row {
  display: grid;
  grid-template-columns: 1fr auto 58px auto;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  padding: 4px 6px;
  border-radius: 6px;
}
.inv-row.bad { background: #fdeceb; }
.inv-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.inv-need { color: var(--muted); font-size: 12px; }
.inv-input { width: 56px; padding: 4px 6px; border: 1px solid var(--line); border-radius: 6px; font-size: 13px; }
.inv-status { font-size: 12px; color: var(--muted); min-width: 54px; text-align: right; }
.inv-row.bad .inv-status { color: var(--no); font-weight: 600; }

.hint { font-size: 12px; color: var(--muted); margin-top: 10px; line-height: 1.45; }

/* Bestandseditor */
.inv-editor-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; margin-top: 14px;
}
.inv-editor-head h3 { margin: 0; }
.inv-actions { display: flex; gap: 4px; flex-wrap: wrap; }
.inv-editor { display: flex; flex-direction: column; gap: 3px; margin-top: 8px; }
.inv-grp {
  margin: 8px 0 2px; font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.04em; color: var(--muted);
}
.inv-edit-row {
  display: grid; grid-template-columns: 1fr 58px; gap: 8px;
  align-items: center; font-size: 13px; padding: 2px 6px;
}

/* hidden muss display:flex der .group ueberschreiben */
[hidden] { display: none !important; }

/* Button-Reihen (Rohr-/Platten-Auswahl) */
.btn-row { display: flex; gap: 4px; flex-wrap: wrap; }
.btn.small { padding: 6px 9px; font-size: 13px; min-width: 34px; font-variant-numeric: tabular-nums; }

/* Hilfe-Overlay */
.help-overlay {
  position: absolute; inset: 0;
  background: rgba(20, 26, 34, 0.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 20;
}
.help-card {
  background: #fff; border-radius: 12px; padding: 20px 22px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  max-width: 380px; width: 90%;
}
.help-card h3 { margin: 0 0 12px; font-size: 16px; }
.help-card table { width: 100%; border-collapse: collapse; margin-bottom: 14px; }
.help-card td { padding: 5px 4px; font-size: 13px; border-bottom: 1px solid var(--line); vertical-align: top; }
.help-card td:first-child { font-weight: 600; white-space: nowrap; padding-right: 14px; }

/* Aufbaumodus */
.asm-head { display: flex; align-items: center; justify-content: space-between; }
.asm-head h2 { margin: 0; }
.asm-nav { display: flex; align-items: center; gap: 8px; margin: 12px 0 8px; }
.asm-nav .btn { padding: 6px 14px; font-size: 16px; line-height: 1; }
.asm-nav .btn:disabled { opacity: 0.4; cursor: default; }
.asm-counter { flex: 1; text-align: center; font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums; }
.asm-progress { height: 6px; background: var(--line); border-radius: 4px; overflow: hidden; margin-bottom: 12px; }
#asm-progress-bar { height: 100%; width: 0; background: var(--accent); transition: width 0.15s ease; }
.asm-title { font-size: 14px; color: var(--ink); margin: 0 0 8px; text-transform: none; letter-spacing: 0; }
.asm-body { display: flex; flex-direction: column; gap: 2px; }
.asm-cat { font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); margin: 12px 0 4px; }
.asm-row {
  display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center;
  padding: 6px 6px; border-radius: 6px; font-size: 13px;
}
.asm-row:nth-child(even) { background: #f7f9fc; }
.asm-name { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.asm-count { font-variant-numeric: tabular-nums; font-weight: 600; color: var(--ink); }
.asm-badge {
  font-size: 11px; font-weight: 700; color: #45505f;
  background: #eef2f7; border: 1px solid var(--line); border-radius: 5px;
  padding: 1px 6px; font-variant-numeric: tabular-nums;
}

/* Responsive — ab 768 px aufwärts gilt das volle Desktop-Layout.
   Strategie: zwei Stufen
   ≤768px  — kompakte Darstellung
   ≤480px  — nur Kern-Teile in der Bauteil-Leiste */

/* ≤768 px: Hamburger-Modus */
@media (max-width: 768px) {
  /* Brand: "Builder" weglassen, nur QUADRO zeigen */
  .brand span { display: none; }

  /* Keyboard-Button + andere Desktop-only Elemente ausblenden */
  .hide-mobile { display: none !important; }

  /* Toolbar: Hauptzeile kompakter */
  #toolbar-left  { padding: 5px 10px; gap: 6px; }
  #toolbar-right { padding: 5px 8px;  gap: 0; border-left: none; }
  #toolbar-ctx   { padding: 4px 10px; }

  /* Hamburger-Button einblenden */
  #btn-hamburger { display: inline-flex !important; }

  /* toolbar-icon-row wird zur echten Flex-Zeile im Dropdown */
  #toolbar-right-inner .toolbar-icon-row {
    display: flex;
    gap: 4px;
    align-items: center;
  }
  /* Divider innerhalb der Icon-Zeile bleibt vertikal */
  #toolbar-right-inner .toolbar-icon-row .divider {
    width: 1px;
    height: 20px;
    margin: 0 2px;
  }

  /* Inner: standardmäßig verborgen — wird per .open gezeigt */
  #toolbar-right-inner {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 6px 24px rgba(0,0,0,.13);
    padding: 8px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    min-width: 220px;
    z-index: 300;
  }

  #toolbar-right-inner.open { display: flex; }

  /* Trennlinien werden horizontal */
  #toolbar-right-inner .divider {
    width: 100%;
    height: 1px;
    background: var(--line);
    margin: 3px 0;
  }

  /* Entwürfe-Button volle Breite */
  #toolbar-right-inner #btn-file {
    width: 100%;
    justify-content: flex-start;
  }
  #toolbar-right-inner #file-menu { width: 100%; }

  /* Sprach-Dropdown volle Breite */
  #toolbar-right-inner .lang-select { width: 100%; }

  /* file-pop: volle Viewport-Breite auf Mobile */
  #file-pop {
    position: fixed;
    right: 8px;
    left: 8px;
    width: auto;
    top: auto;
  }
}

/* ≤480 px: nur Kern-Teile in der Bauteil-Leiste */
@media (max-width: 480px) {
  /* Nicht-essentielle Tubes (10, 20, 25, 52 cm) und Platten (80er) ausblenden */
  .hide-narrow { display: none !important; }
}

/* Druckbereich (nur beim Drucken sichtbar) */
#print-area { display: none; }
@media print {
  body * { visibility: hidden; }
  #print-area, #print-area * { visibility: visible; }
  #print-area {
    display: block; position: absolute; left: 0; top: 0; width: 100%;
    padding: 0 8mm; color: #000; font-size: 12pt;
  }
  #print-area h1 { font-size: 20pt; margin: 0 0 12px; }
  #print-area .p-step { break-inside: avoid; margin-bottom: 12px; }
  #print-area h2 { font-size: 14pt; margin: 10px 0 4px; border-bottom: 1px solid #888; padding-bottom: 3px; }
  #print-area ul { margin: 4px 0 0; padding-left: 20px; }
  #print-area li { margin: 2px 0; }
}