/* ============================================================
   E-Rechnung öffnen & prüfen – eigene Stile (Präfix er-)
   Farben und Schrift kommen aus stil.css; hier nur das Werkzeug.
   ============================================================ */
:root{
  --er-rot:#A32F2A; --er-rot-h:#FBEDEC;
  --er-gelb:#8A5A00; --er-gelb-h:#FBF3E2;
  --er-blau:#2D5C7A; --er-blau-h:#EAF1F6;
  --er-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

/* ---------- Ablagefläche ---------- */
.er-zone{border:2px dashed #B7C3BC;border-radius:16px;background:var(--weiss);padding:2.6rem 1.5rem 2.2rem;text-align:center;
  transition:border-color .12s,background .12s;position:relative}
.er-zone-aktiv{border-color:var(--gruen-t);background:var(--gruen-h)}
.er-zone-symbol{width:3.2rem;height:3.2rem;border-radius:12px;background:var(--gruen-h);color:var(--gruen-t);display:flex;align-items:center;justify-content:center;margin:0 auto 1rem}
.er-zone-symbol svg{width:1.6rem;height:1.6rem}
.er-zone h2{font-size:1.35rem;margin:0 0 .35rem;letter-spacing:-.02em}
.er-zone p{margin:0;color:var(--tinte-2);font-size:.97rem}
.er-zone .er-zone-knoepfe{display:flex;gap:.7rem;justify-content:center;flex-wrap:wrap;margin:1.3rem 0 .9rem}
.er-datei-label{position:relative;display:inline-flex}
.er-datei-label input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;font-size:0}
.er-datei-label:focus-within .btn{outline:3px solid var(--gruen);outline-offset:2px}
.er-zone .btn{cursor:pointer;font-family:inherit}
.er-zone-klein{font-size:.84rem!important;color:var(--tinte-2)}
.er-zone-klein b{font-weight:600;color:var(--tinte)}

/* Vorteile unter der Ablagefläche */
.er-vorteile{display:grid;gap:1rem 1.5rem;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));margin-top:1.4rem}
.er-vorteil{display:flex;gap:.7rem;align-items:flex-start;font-size:.92rem;color:var(--tinte-2)}
.er-vorteil svg{width:1.15rem;height:1.15rem;flex:none;color:var(--gruen-t);margin-top:.15rem}
.er-vorteil b{display:block;color:var(--tinte);font-weight:640}

/* Fortschritt */
.er-fortschritt{margin:1.2rem 0 0;padding:.85rem 1.1rem;border-radius:10px;background:var(--grau);color:var(--tinte);font-size:.95rem;
  display:flex;gap:.7rem;align-items:center}
.er-fortschritt::before{content:"";width:1rem;height:1rem;border-radius:50%;border:2px solid var(--gruen-t);border-right-color:transparent;flex:none;animation:er-dreh .8s linear infinite}
.er-fortschritt[hidden],.er-zone[hidden]{display:none}
.er-fortschritt-fehler{background:var(--er-rot-h);color:var(--er-rot)}
.er-fortschritt-fehler::before{display:none}
@keyframes er-dreh{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.er-fortschritt::before{animation:none;border-right-color:var(--gruen-t)}}

/* ---------- Ergebnis ---------- */
.er-ergebnis{margin-top:1.6rem}
.er-status{border-radius:14px;padding:1.4rem 1.6rem;border:1px solid var(--linie);border-left-width:5px;background:var(--weiss)}
.er-status h2{font-size:clamp(1.35rem,2.6vw,1.75rem);margin:0 0 .45rem;letter-spacing:-.02em;outline:none}
.er-status h2:focus-visible{outline:3px solid var(--gruen);outline-offset:4px;border-radius:4px}
.er-status-text{margin:0;font-size:1rem;color:var(--tinte)}
.er-status-klein{margin:.7rem 0 0;font-size:.85rem;color:var(--tinte-2)}
.er-status-gueltig{border-left-color:var(--gruen-t);background:var(--gruen-h)}
.er-status-gueltig h2{color:var(--gruen-d)}
.er-status-probleme{border-left-color:var(--er-rot);background:var(--er-rot-h)}
.er-status-probleme h2{color:var(--er-rot)}
.er-status-kein-format{border-left-color:var(--er-gelb);background:var(--er-gelb-h)}
.er-status-kein-format h2{color:var(--er-gelb)}
.er-status-hinweis{border-left-color:var(--er-gelb);background:var(--er-gelb-h)}
.er-status-hinweis h2{color:var(--er-gelb)}
.er-status-unbestimmt{border-left-color:var(--tinte-2);background:var(--grau)}

/* Prüfstufen */
.er-stufen{list-style:none;margin:1.2rem 0 0;padding:0;border:1px solid var(--linie);border-radius:14px;background:var(--weiss);overflow:hidden}
.er-stufe{display:flex;gap:.9rem;padding:.75rem 1.1rem;border-top:1px solid var(--linie);align-items:flex-start}
.er-stufe:first-child{border-top:none}
.er-stufe-symbol{flex:none;width:1.5rem;height:1.5rem;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:800;margin-top:.1rem;
  background:var(--grau);color:var(--tinte-2)}
.er-stufe-ok .er-stufe-symbol{background:var(--gruen-h);color:var(--gruen-d)}
.er-stufe-fehler .er-stufe-symbol{background:var(--er-rot-h);color:var(--er-rot)}
.er-stufe-warnung .er-stufe-symbol{background:var(--er-gelb-h);color:var(--er-gelb)}
.er-stufe-text{display:flex;flex-direction:column;gap:.1rem;min-width:0}
.er-stufe-titel{font-weight:620;font-size:.97rem}
.er-stufe-status{font-weight:500;color:var(--tinte-2)}
.er-stufe-fehler .er-stufe-status{color:var(--er-rot)}
.er-stufe-warnung .er-stufe-status{color:var(--er-gelb)}
.er-stufe-detail{font-size:.84rem;color:var(--tinte-2);overflow-wrap:anywhere}

/* Befundkarten */
.er-befunde-titel{font-size:1.2rem;margin:1.8rem 0 .8rem;letter-spacing:-.015em}
.er-befunde{display:flex;flex-direction:column;gap:.9rem}
.er-karte{border:1px solid var(--linie);border-left-width:5px;border-radius:14px;background:var(--weiss);padding:1.1rem 1.3rem 1rem}
.er-karte-error{border-left-color:var(--er-rot)}
.er-karte-warning{border-left-color:var(--er-gelb)}
.er-karte-information{border-left-color:var(--er-blau)}
.er-karte-neutral{border-left-color:var(--tinte-2);margin-top:1rem}
.er-karte-kopf{display:flex;gap:.6rem .8rem;align-items:baseline;flex-wrap:wrap;margin-bottom:.45rem}
.er-karte-kopf h4{font-size:1.08rem;margin:0;letter-spacing:-.012em}
.er-schwere{font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:.2rem .5rem;border-radius:5px;background:var(--grau);color:var(--tinte-2)}
.er-karte-error .er-schwere{background:var(--er-rot-h);color:var(--er-rot)}
.er-karte-warning .er-schwere{background:var(--er-gelb-h);color:var(--er-gelb)}
.er-karte-information .er-schwere{background:var(--er-blau-h);color:var(--er-blau)}
.er-ort{font-size:.82rem;color:var(--tinte-2);margin-left:auto}
.er-karte-text{margin:0 0 .5rem;font-size:.95rem;color:var(--tinte)}
.er-karte-frage{margin:.7rem 0 .2rem;font-size:.8rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--tinte-2)}
.er-details{margin-top:.6rem;border-top:1px solid var(--linie);padding-top:.5rem}
.er-details summary{cursor:pointer;font-size:.86rem;color:var(--gruen-t);font-weight:600;list-style-position:inside}
.er-details summary:focus-visible{outline:3px solid var(--gruen);outline-offset:2px;border-radius:4px}
.er-details-frei{border-top:none;margin-top:.8rem}
.er-technisch{margin:.6rem 0 0;font-size:.84rem;display:grid;grid-template-columns:minmax(7rem,max-content) 1fr;gap:.35rem .9rem}
.er-technisch dt{font-weight:650;color:var(--tinte-2)}
.er-technisch dd{margin:0;overflow-wrap:anywhere}
.er-code{font-family:var(--er-mono);font-size:.8rem;background:var(--grau);padding:.1rem .35rem;border-radius:4px;white-space:pre-wrap;word-break:break-all;display:inline-block;margin:.05rem 0}
.er-mono-umbruch{overflow-wrap:anywhere}
@media (max-width:600px){.er-technisch{grid-template-columns:1fr}.er-technisch dt{margin-top:.3rem}}

/* Aktionen */
.er-aktionen{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.5rem}
.er-aktionen .btn{cursor:pointer;font-family:inherit}

/* ---------- Rechnungsansicht ---------- */
.er-ansicht-titel{font-size:1.5rem;margin:2.6rem 0 .3rem;letter-spacing:-.02em}
.er-ansicht-hinweis{margin:0 0 1rem;font-size:.9rem;color:var(--tinte-2)}
.er-rechnung{border:1px solid var(--linie);border-radius:16px;background:var(--weiss);padding:clamp(1.2rem,3vw,2.2rem);box-shadow:0 18px 40px rgba(13,30,39,.06)}
.er-r-kopf{display:flex;justify-content:space-between;gap:1.5rem;flex-wrap:wrap;align-items:flex-start;padding-bottom:1.4rem;border-bottom:1px solid var(--linie)}
.er-r-art{margin:0 0 .3rem;font-size:.78rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--gruen-t)}
.er-r-code{font-weight:500;letter-spacing:0;text-transform:none;color:var(--tinte-2)}
.er-r-titel h3{font-size:clamp(1.5rem,3vw,2rem);margin:0 0 .2rem;letter-spacing:-.03em;line-height:1.1}
.er-r-datum{margin:0;color:var(--tinte-2)}
.er-r-betrag{text-align:right;background:var(--dunkel);color:#fff;border-radius:12px;padding:.9rem 1.2rem;min-width:13rem}
.er-r-betrag-label{display:block;font-size:.76rem;letter-spacing:.1em;text-transform:uppercase;color:#B9C6CE;font-weight:700}
.er-r-betrag strong{display:block;font-size:1.8rem;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1.15;margin:.2rem 0}
.er-r-faellig{font-size:.84rem;color:#B9C6CE}
@media (max-width:600px){.er-r-betrag{text-align:left;width:100%}}

.er-r-parteien{display:grid;gap:1.5rem 2.5rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));padding:1.4rem 0;border-bottom:1px solid var(--linie)}
.er-r-partei h4,.er-r-block h4{font-size:.78rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--tinte-2);margin:0 0 .6rem;display:flex;gap:.5rem;align-items:baseline}
.er-r-name{font-weight:700;font-size:1.08rem;margin:0 0 .15rem}
.er-r-handelsname{margin:0 0 .15rem;color:var(--tinte-2);font-size:.92rem}
.er-r-adresse{margin:0 0 .6rem;line-height:1.5}
.er-bt{font-size:.68rem;font-weight:600;letter-spacing:.04em;color:#9AA7AE;text-transform:none;background:var(--grau);padding:.05rem .35rem;border-radius:4px;cursor:help;white-space:nowrap}
.er-r-block{padding:1.4rem 0;border-bottom:1px solid var(--linie)}
.er-r-block:last-child{border-bottom:none;padding-bottom:.4rem}
.er-dl{display:grid;grid-template-columns:minmax(9rem,max-content) 1fr;gap:.4rem 1.2rem;margin:0;font-size:.95rem}
.er-dl dt{color:var(--tinte-2);display:flex;gap:.4rem;align-items:baseline;flex-wrap:wrap}
.er-dl dd{margin:0;overflow-wrap:anywhere;white-space:pre-line}
.er-dl-klein{font-size:.88rem;gap:.2rem 1rem}
@media (max-width:600px){.er-dl{grid-template-columns:1fr;gap:.1rem}.er-dl dd{margin-bottom:.5rem}}
.er-fehlt{color:var(--er-gelb);font-style:italic}
.er-hinweis-klein{font-size:.85rem;color:var(--tinte-2);margin:.6rem 0 0}

/* Positionen */
.er-tab-wrap{overflow-x:auto;border:1px solid var(--linie);border-radius:10px}
.er-tab{width:100%;border-collapse:collapse;font-size:.93rem}
.er-tab th{text-align:left;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--tinte-2);background:var(--grau);padding:.6rem .8rem;font-weight:700;white-space:nowrap}
.er-tab td{padding:.7rem .8rem;border-top:1px solid var(--linie);vertical-align:top}
.er-tab .er-c-zahl{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
.er-tab .er-c-pos{width:3.5rem;color:var(--tinte-2)}
.er-tab .er-c-betrag{font-weight:650}
.er-p-name{font-weight:600}
.er-p-beschr{font-size:.88rem;color:var(--tinte);margin-top:.15rem;white-space:pre-line}
.er-p-klein{font-size:.8rem;color:var(--tinte-2);margin-top:.15rem}
@media (max-width:720px){
  .er-tab-wrap{border:none;overflow:visible}
  .er-tab thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .er-tab,.er-tab tbody,.er-tab tr,.er-tab td{display:block}
  .er-tab tr{border:1px solid var(--linie);border-radius:10px;margin-bottom:.8rem;padding:.4rem .9rem .6rem;background:var(--weiss)}
  .er-tab td{border:none;padding:.35rem 0;display:grid;grid-template-columns:minmax(6.5rem,32%) 1fr;gap:.6rem;align-items:baseline}
  .er-tab td::before{content:attr(data-label);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--tinte-2);font-weight:700}
  .er-tab .er-c-zahl{text-align:left;white-space:normal}
  .er-tab .er-c-pos{width:auto}
  .er-tab td[data-label="Bezeichnung"]{grid-template-columns:1fr}
  .er-tab td[data-label="Bezeichnung"]::before{display:none}
  .er-tab td[data-label="Bezeichnung"] .er-p-name{font-size:1.02rem}
}

/* Summen */
.er-sum{max-width:30rem;margin-left:auto;font-size:.97rem}
.er-sum-zeile{display:flex;justify-content:space-between;gap:1.5rem;padding:.4rem 0;border-bottom:1px dashed var(--linie)}
.er-sum-zeile:last-child{border-bottom:none}
.er-sum-wert{font-variant-numeric:tabular-nums;white-space:nowrap;text-align:right}
.er-sum-netto{font-weight:600;border-top:1px solid var(--linie)}
.er-sum-brutto{font-weight:700;font-size:1.05rem;border-top:2px solid var(--tinte);border-bottom:none}
.er-sum-faellig{font-weight:800;font-size:1.1rem;background:var(--gruen-h);margin-top:.4rem;padding:.6rem .8rem;border-radius:8px;border:none}
.er-sum-grund{font-size:.85rem;color:var(--tinte-2);padding-top:0;border:none}
.er-r-notizen{margin-top:1rem}
.er-r-notizen h5{font-size:.78rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--tinte-2);margin:0 0 .4rem;display:flex;gap:.5rem;align-items:baseline}
.er-r-notizen p{margin:0 0 .5rem;white-space:pre-line;font-size:.95rem}

/* ---------- Erklärende Abschnitte ---------- */
.er-pruefliste{list-style:none;margin:0;padding:0;display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(17rem,1fr))}
.er-pruefliste li{background:var(--weiss);border:1px solid var(--linie);border-radius:14px;padding:1.2rem 1.3rem}
.er-pruefliste b{display:block;font-size:1rem;margin-bottom:.3rem}
.er-pruefliste p{margin:0;font-size:.92rem;color:var(--tinte-2)}
.er-pruefliste .er-stand{display:block;margin-top:.5rem;font-size:.82rem;color:var(--gruen-t);font-weight:600}
.er-faq{border-bottom:1px solid var(--linie)}
.er-faq summary{cursor:pointer;padding:1rem 0;font-weight:640;font-size:1.05rem;letter-spacing:-.01em;list-style:none;display:flex;justify-content:space-between;gap:1rem;align-items:center}
.er-faq summary::-webkit-details-marker{display:none}
.er-faq summary::after{content:"+";font-weight:400;font-size:1.4rem;color:var(--gruen-t);flex:none;line-height:1}
.er-faq[open] summary::after{content:"–"}
.er-faq summary:focus-visible{outline:3px solid var(--gruen);outline-offset:2px;border-radius:6px}
.er-faq summary h3{font-size:inherit;font-weight:inherit;margin:0;letter-spacing:inherit}
.er-faq p{margin:0 0 1rem;color:var(--tinte);max-width:60rem}
.er-faq ul{margin:0 0 1rem;padding-left:1.2rem}

@media print{
  .er-zone,.er-aktionen,.er-vorteile,#was-wird-geprueft,#faq,.er-details summary{display:none!important}
  .er-details{display:block}.er-details>*{display:block}
  .er-rechnung{box-shadow:none}
  .er-status,.er-karte{break-inside:avoid}
}