:root{
  --gap: 6px;
  --cell-bg: #f6f6f8;
  --cell-border: #ddd;
  --marked-bg: #6ea8fe;
  --line-bg: #f6c85f; /* Gewinnfarbe */
  --text-color: #111;
/*  --card-width: min(1472vmin, 900px);*/
  --card-width: min(92vmin, 900px);
/*  --card-width: min(184vmin, 1800px);*/
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  --num-of-rows: 8;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--text-color);
  display:flex;
  align-items:flex-start;
  justify-content:center;
  padding:24px;
  background:linear-gradient(180deg,#fff,#f3f7ff);
  min-height:100vh;
}
/*
.heading{
  position: sticky;
  top: 0;
  padding: 1rem;
  border-radius: 8px;
  font-weight: bold;
  z-index: 999;
}
*/
.app{
  width:100%;
  max-width:1100px;
}

h1{
  margin:0 0 12px 0;
  font-size:1.25rem;
  text-align:center;
}

/* Karte Container */
#card-container{
  width:var(--card-width);
  margin:0 auto;
  display:grid;
  grid-template-columns: repeat(var(--num-of-rows), 1fr);
  gap:var(--gap);
  padding:var(--gap);
  background:transparent;
  user-select:none;
}

/* Einzelnes Feld */
.cell{
  background:var(--cell-bg);
  border:1px solid var(--cell-border);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:8px;
  text-align:center;
  font-size:0.75rem;
  line-height:1.1;
  /*overflow:hidden;*/
  position:relative;
  cursor:pointer;
  aspect-ratio: 1 / 1; /* macht das Feld quadratisch */
  border-radius:8px;
}

/* Text in den Feldern nicht editierbar */
.cell .label{
  pointer-events:none;
  white-space:normal;
}

/* Markiert (einfaches Anklicken) */
.cell.marked{
  background:var(--marked-bg);
  color:white;
}

/* Wenn komplette Zeile/Spalte/Diagonale gewonnen hat */
.cell.bingo-line{
  background:var(--line-bg) !important;
  color: #222;
  font-weight:700;
  box-shadow: 0 0 0 3px rgba(0,0,0,0.03) inset;
}

/* Center special: input */
.cell.center{
  padding:6px;
  display:flex;
  flex-direction:column;
  gap:6px;
}

.cell.center input[type="text"]{
  width:100%;
  padding:6px;
  border-radius:6px;
  border:1px solid #cfcfcf;
  font-size:0.9rem;
  background:white;
}

/* center mark button to toggle marked state separately */
.center-controls{
  display:flex;
  gap:6px;
  align-items:center;
  justify-content:center;
}

/* Accessibility focus */
.cell:focus{
  outline:3px solid rgba(100,150,250,0.25);
  outline-offset:2px;
}

/* Controls */
.controls{
  display:flex;
  gap:10px;
  justify-content:center;
  margin-top:14px;
}

.controls button{
  padding:8px 12px;
  border-radius:8px;
  border:1px solid #cfcfcf;
  background:white;
  cursor:pointer;
}

/* Modal (notes) */
.modal{
  position:fixed;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(0,0,0,0.35);
  opacity:0;
  pointer-events:none;
  transition:opacity .15s ease;
}

.modal[aria-hidden="false"]{
  opacity:1;
  pointer-events:auto;
}

.modal-inner{
  width:min(720px,92%);
  max-width:720px;
  background:white;
  border-radius:12px;
  padding:18px;
  box-shadow:0 20px 50px rgba(0,0,0,0.2);
}

.modal-inner textarea{
  width:100%;
  min-height:160px;
  resize:vertical;
  padding:10px;
  border-radius:8px;
  border:1px solid #ddd;
  font-size:0.95rem;
}

.modal-actions{
  margin-top:10px;
  display:flex;
  gap:8px;
  justify-content:flex-end;
}

/* small screens tweak */
@media (max-width:520px){
  h1{font-size:1rem}
  .cell{font-size:0.65rem}
}