:root {
  --bg: #ffffff;
  --text: #1a1a1b;
  --border: #d3d6da;
  --border-filled: #878a8c;
  --key-bg: #d3d6da;
  --key-text: #1a1a1b;
  --correct: #6aaa64;
  --present: #c9b458;
  --absent: #787c7e;
  --evaluated-text: #ffffff;
  --dialog-bg: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121213;
    --text: #f8f8f8;
    --border: #3a3a3c;
    --border-filled: #565758;
    --key-bg: #818384;
    --key-text: #f8f8f8;
    --absent: #3a3a3c;
    --dialog-bg: #1a1a1b;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

/* Wisch-nach-unten darf keinen Seiten-Reload auslösen (installierte PWA). */
html, body { overscroll-behavior-y: none; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100dvh;
}

.header {
  flex: none;
  width: 100%;
  max-width: 500px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border);
  padding: 0.3rem 0.5rem;
}
.title { font-size: 1.15rem; letter-spacing: 0.12em; font-weight: 800; }
.mode-switch { display: flex; gap: 2px; }
.mode-button {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text);
  opacity: 0.55;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.4rem 0.4rem 0.3rem;
  cursor: pointer;
}
.mode-button.active { opacity: 1; border-bottom-color: var(--correct); }
.icon-button {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--text);
}
/* Schmale Geräte (Standard-Android 360px, Minimum 320px): Header kompakter,
   sonst läuft er horizontal über. */
@media (max-width: 420px) {
  .title { font-size: 1rem; letter-spacing: 0.06em; }
  .mode-button { font-size: 0.7rem; letter-spacing: 0.02em; padding: 0.4rem 0.25rem 0.3rem; }
  .icon-button { font-size: 1.1rem; }
}

.game {
  flex: 1 1 0;
  min-height: 0;
  width: 100%;
  max-width: 500px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem;
}

.board-indicator {
  flex: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0.25rem 0;
  /* Bleibt beim vertikalen Scrollen (sehr hohe Felder) sichtbar. */
  position: sticky;
  top: -0.5rem;
  z-index: 5;
  width: 100%;
  background: var(--bg);
}
.board-indicator[hidden] { display: none; }
.indicator-chip {
  min-width: 30px;
  height: 30px;
  border: 1.5px solid var(--border-filled);
  border-radius: 6px;
  background: none;
  color: var(--text);
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0 4px;
}
.indicator-chip.active { border-color: var(--text); border-width: 2.5px; }
.indicator-chip.solved { background: var(--correct); border-color: var(--correct); color: var(--evaluated-text); }

.boards {
  margin: auto;
  display: grid;
  gap: 10px;
  /* --rows setzt js/main.js je Modus (6/9/13). Breite so begrenzt, dass das Feld
     samt Header, Indikator und Tastatur ohne vertikales Scrollen auf den Schirm
     passt; die 200px-Untergrenze hält die Kacheln lesbar (darunter scrollt .game
     und der sticky Indikator bleibt sichtbar). */
  width: min(100vw - 20px,
    clamp(200px,
      (100dvh - 300px - (var(--rows, 6) - 1) * 5px) * 5 / var(--rows, 6) + 20px,
      350px));
  flex: none;
}
.boards-multi {
  grid-auto-flow: column;
  grid-auto-columns: 100%;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}
.boards-multi::-webkit-scrollbar { display: none; }
.boards-multi .board { scroll-snap-align: center; scroll-snap-stop: always; }

.board { display: grid; gap: 5px; align-content: start; }
.board.solved { opacity: 0.55; }
.row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 5px; }
.row-hidden { display: none; }
.tile {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 2px solid var(--border);
  font-size: clamp(1.2rem, 6vmin, 2rem);
  font-weight: 700;
  text-transform: uppercase;
  user-select: none;
}
.tile.filled { border-color: var(--border-filled); }
.tile[data-state] { border-color: transparent; color: var(--evaluated-text); }
.tile[data-state='correct'] { background: var(--correct); }
.tile[data-state='present'] { background: var(--present); }
.tile[data-state='absent'] { background: var(--absent); }
.tile.pop { animation: pop 120ms ease-in-out; }
.tile.flip { animation: flip 500ms ease; }
@keyframes pop { 50% { transform: scale(1.12); } }
@keyframes flip {
  0% { transform: rotateX(0); }
  50% { transform: rotateX(90deg); }
  100% { transform: rotateX(0); }
}
.row.shake { animation: shake 600ms; }
@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

.keyboard {
  flex: none;
  width: 100%;
  max-width: 500px;
  padding: 0.25rem 0.25rem max(0.5rem, env(safe-area-inset-bottom));
}
.key-row { display: flex; gap: 4px; justify-content: center; margin-bottom: 5px; }
.key {
  position: relative;
  overflow: hidden;
  flex: 1;
  max-width: 42px;
  height: 52px;
  border: none;
  border-radius: 4px;
  background: var(--key-bg);
  color: var(--key-text);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
  padding: 0;
}
.key-wide { max-width: 60px; flex: 1.4; font-size: 1.1rem; }
.key-segments {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr;
}
.keyboard[data-boards='4'] .key-segments { grid-template-columns: repeat(2, 1fr); }
.keyboard[data-boards='8'] .key-segments { grid-template-columns: repeat(4, 1fr); }
.key-segments i[data-state='correct'] { background: var(--correct); }
.key-segments i[data-state='present'] { background: var(--present); }
.key-segments i[data-state='absent'] { background: var(--absent); }
.key-label {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  height: 100%;
}

.toast-container {
  position: fixed;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 10;
}
.toast {
  background: var(--text);
  color: var(--bg);
  padding: 0.6rem 1rem;
  border-radius: 6px;
  font-weight: 600;
}

.dialog {
  position: relative;
  margin: auto;
  border: none;
  border-radius: 8px;
  background: var(--dialog-bg);
  color: var(--text);
  padding: 1.5rem;
  width: min(90vw, 360px);
  text-align: center;
}
.dialog::backdrop { background: rgb(0 0 0 / 0.5); }
.dialog h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.dialog-close {
  position: absolute;
  top: 0.5rem;
  right: 0.75rem;
  background: none;
  border: none;
  font-size: 1rem;
  cursor: pointer;
  color: var(--text);
}
.stats { display: flex; justify-content: center; gap: 1.5rem; }
.stat-value { font-size: 1.75rem; font-weight: 700; }
.stat-label { font-size: 0.7rem; }
.distribution { display: flex; flex-direction: column; gap: 3px; margin-bottom: 1.25rem; }
.dist-row { display: flex; align-items: center; gap: 6px; }
.dist-count { font-size: 0.75rem; width: 2ch; text-align: right; font-variant-numeric: tabular-nums; }
.dist-bar {
  background: var(--absent);
  color: var(--evaluated-text);
  font-size: 0.75rem;
  font-weight: 700;
  text-align: right;
  padding: 1px 6px;
  border-radius: 2px;
}
.primary-button {
  background: var(--correct);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}