:root {
  --tinte: #1d1d1b;
  --grau: #6b6b66;
  --papier: #f6f4ef;
  --flaeche: #fffdf8;
  --flur: #d9d6cf;
  --akzent: #2f6fb5;
  --akzent-hell: #cfe0f4;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--tinte); background: var(--papier); }

header { background: #fff; border-bottom: 1px solid #ddd; padding: 12px 20px; display: flex; flex-wrap: wrap; gap: 12px 30px; align-items: center; justify-content: space-between; }
.kopf { display: flex; gap: 14px; align-items: center; }
.marke { width: 46px; height: 46px; background: var(--tinte); color: #fff; font: 700 34px/46px system-ui, sans-serif; text-align: center; }
h1 { font-size: 19px; margin: 0; }
.unter { color: var(--grau); font-size: 13px; }
nav { display: flex; flex-wrap: wrap; gap: 6px; }
nav a { text-decoration: none; color: var(--tinte); border: 1px solid #ccc; border-radius: 18px; padding: 6px 14px; font-size: 14px; background: #fff; }
nav a.aktiv { background: var(--tinte); color: #fff; border-color: var(--tinte); }

main { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 18px; padding: 18px 20px; max-width: 1500px; margin: 0 auto; }
@media (max-width: 900px) { main { grid-template-columns: 1fr; padding: 12px; } }

.karte { background: #fff; border: 1px solid #ddd; border-radius: 10px; padding: 12px 14px; }
.werkzeuge { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.werkzeuge h2 { margin: 0; font-size: 17px; background: var(--tinte); color: #fff; padding: 3px 10px; text-transform: uppercase; letter-spacing: .02em; }
.schalter { font-size: 13px; color: var(--grau); cursor: pointer; user-select: none; }
.svgrahmen { margin-top: 10px; }
svg { width: 100%; height: auto; display: block; touch-action: manipulation; }
.hinweis { color: var(--grau); font-size: 12px; margin: 6px 0 0; }

/* Plan */
.flaeche-dach { fill: none; stroke: #777; stroke-width: 1.5; }
.flaeche-flur { fill: var(--flur); stroke: var(--tinte); stroke-width: 3; cursor: pointer; }
.raum { fill: var(--flaeche); stroke: var(--tinte); stroke-width: 3; cursor: pointer; transition: fill .2s, opacity .2s; }
.raum.typ-wc, .raum.typ-neben { fill: #f0ede6; }
.raum:hover, .flaeche-flur:hover { fill: #eef4fb; }
svg.gewaehlt .raum, svg.gewaehlt .flaeche-flur { opacity: .45; }
svg.gewaehlt .raum.aktiv, svg.gewaehlt .flaeche-flur.aktiv { opacity: 1; fill: var(--akzent-hell); stroke: var(--akzent); stroke-width: 6; }
.raumnr { font: 700 22px system-ui, sans-serif; fill: #fff; pointer-events: none; }
.raumnr-bg { fill: var(--tinte); pointer-events: none; }
.raumname { font: 18px system-ui, sans-serif; fill: var(--grau); pointer-events: none; }
.raumkurz { font: 15px system-ui, sans-serif; fill: var(--grau); pointer-events: none; }
.dachtext { font: 20px system-ui, sans-serif; fill: #777; }
svg.mit-original .raum, svg.mit-original .flaeche-flur { fill-opacity: .35; }
.symbol { cursor: pointer; }
.symbol .puls { fill: none; stroke: #f5b700; stroke-width: 5; opacity: 0; }
.symbol.leuchtet .puls { animation: puls 1.2s ease-out 3; }
.symbol.im-raum .puls, .symbol.naechstes .puls { opacity: 1; stroke-width: 4; animation: none; }
@keyframes puls { 0% { opacity: 1; r: 18; } 100% { opacity: 0; r: 40; } }
.punkt { fill: #e0007a; }

/* Seitenleiste */
aside { display: flex; flex-direction: column; gap: 14px; }
.box { background: #fff; border: 1px solid #ddd; border-radius: 10px; padding: 14px 16px; }
.box h3 { margin: 0 0 8px; font-size: 15px; }
.leer { color: var(--grau); }
.raumkopf { display: flex; gap: 10px; align-items: baseline; }
.raumkopf .nr { background: var(--tinte); color: #fff; font-weight: 700; padding: 1px 8px; }
.raumkopf .name { font-size: 18px; font-weight: 600; }
.feld { margin-top: 6px; }
.feld b { font-weight: 600; }
.legende, .raumliste { list-style: none; margin: 0; padding: 0; }
.legende li { display: grid; grid-template-columns: 34px 1fr; gap: 10px; padding: 7px 0; border-top: 1px solid #eee; cursor: pointer; }
.legende li:first-child { border-top: 0; }
.legende li:hover .lname { text-decoration: underline; }
.legende .lname { font-weight: 600; }
.legende .linfo { color: var(--grau); font-size: 13px; }
.legende .lzusatz { font-size: 13px; color: var(--akzent); }
.raumliste { display: flex; flex-wrap: wrap; gap: 6px; }
.raumliste button { border: 1px solid #ccc; background: #fff; border-radius: 6px; padding: 4px 8px; font: inherit; font-size: 13px; cursor: pointer; }
.raumliste button.aktiv { background: var(--akzent); border-color: var(--akzent); color: #fff; }
.zeichnen textarea { width: 100%; font: 12px monospace; }

/* Treppen */
.treppe { cursor: pointer; }
.treppe-flaeche { fill: transparent; stroke: none; }
.treppe-lauf { fill: none; stroke: #f3f1ec; stroke-linejoin: round; }
.treppe-stufe { stroke: #555; stroke-width: 1.6; fill: none; pointer-events: none; }
.treppe-pfeil { stroke: #555; stroke-width: 2; fill: none; pointer-events: none; }
.treppe-auge { fill: #fff; stroke: var(--tinte); stroke-width: 2.5; pointer-events: none; }
.treppe:hover .treppe-lauf { stroke: #eef4fb; }
svg.gewaehlt .treppe { opacity: .45; }
svg.gewaehlt .treppe:has(.aktiv) { opacity: 1; }
svg.gewaehlt .treppe-flaeche.aktiv { fill: var(--akzent-hell); fill-opacity: .6; stroke: var(--akzent); stroke-width: 6; }

/* Wände und Türen */
.wand { fill: none; stroke: var(--tinte); stroke-width: 3; stroke-linejoin: round; pointer-events: none; }
.tuer { pointer-events: none; }
.tuer-oeffnung { stroke: #fbfaf6; stroke-width: 5; }
.tuer-bogen { fill: none; stroke: #555; stroke-width: 1.3; stroke-dasharray: 3 2; }
.tuer-blatt { stroke: var(--tinte); stroke-width: 2.2; }