:root {
  --bg: #ffffff;
  --text: #1a1a1b;
  --tile-border: #d3d6da;
  --tile-border-filled: #878a8c;
  --key-bg: #d3d6da;
  --key-text: #1a1a1b;
  --correct: #6aaa64;
  --present: #c9b458;
  --absent: #787c7e;
  --modal-bg: #ffffff;
  --overlay: rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121213;
    --text: #f8f8f8;
    --tile-border: #3a3a3c;
    --tile-border-filled: #565758;
    --key-bg: #818384;
    --key-text: #f8f8f8;
    --absent: #3a3a3c;
    --modal-bg: #1f1f21;
    --overlay: rgba(0, 0, 0, 0.65);
  }
}

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

html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  touch-action: manipulation;
}

header {
  width: 100%;
  max-width: 500px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--tile-border);
}

h1 {
  font-size: 1.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.icon-btn {
  background: none;
  border: 1px solid var(--tile-border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
}

main {
  width: 100%;
  max-width: 500px;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 10px;
}

#board {
  display: grid;
  grid-template-rows: repeat(6, 1fr);
  gap: 5px;
  margin: 8px 0;
}

.row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 5px;
}

.tile {
  width: min(60px, 16vw);
  height: min(60px, 16vw);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: min(1.7rem, 7vw);
  font-weight: bold;
  text-transform: uppercase;
  border: 2px solid var(--tile-border);
  user-select: none;
  transition: transform 0.1s;
}

.tile.filled { border-color: var(--tile-border-filled); animation: pop 0.1s; }
.tile.correct { background: var(--correct); border-color: var(--correct); color: #fff; }
.tile.present { background: var(--present); border-color: var(--present); color: #fff; }
.tile.absent { background: var(--absent); border-color: var(--absent); color: #fff; }
.tile.reveal { animation: flip 0.5s ease; }

.tile.small {
  width: 34px; height: 34px;
  font-size: 1rem;
  display: inline-flex;
  margin: 2px;
}

@keyframes pop { 50% { transform: scale(1.1); } }
@keyframes flip { 0% { transform: rotateX(0); } 50% { transform: rotateX(90deg); } 100% { transform: rotateX(0); } }
@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
  50% { transform: translateX(-4px); }
}
.row.shake { animation: shake 0.5s; }

#keyboard {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 8px;
}

.kb-row {
  display: flex;
  justify-content: center;
  gap: 4px;
}

.key {
  flex: 1;
  max-width: 44px;
  height: 52px;
  border: none;
  border-radius: 4px;
  background: var(--key-bg);
  color: var(--key-text);
  font-size: 0.85rem;
  font-weight: bold;
  text-transform: uppercase;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.key.wide { max-width: 64px; flex: 1.5; font-size: 0.7rem; }
.key.correct { background: var(--correct); color: #fff; }
.key.present { background: var(--present); color: #fff; }
.key.absent { background: var(--absent); color: #fff; }

#toast {
  position: fixed;
  top: 12%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: bold;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
  z-index: 50;
}
#toast.show { opacity: 1; }

#ad-slot { width: 100%; min-height: 0; }

.modal-overlay[hidden] { display: none; }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.modal {
  background: var(--modal-bg);
  border-radius: 10px;
  max-width: 440px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 22px;
  position: relative;
}

.modal h2 { margin-bottom: 12px; }
.modal h3 { margin: 14px 0 8px; }
.modal p { margin: 8px 0; line-height: 1.45; }
.modal hr { border: none; border-top: 1px solid var(--tile-border); margin: 14px 0; }

.modal-close {
  position: absolute;
  top: 10px;
  right: 14px;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text);
  cursor: pointer;
}

.example { margin: 6px 0; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  text-align: center;
}

.stat-num { font-size: 1.8rem; font-weight: bold; }
.stat-label { font-size: 0.7rem; opacity: 0.8; }

.dist-row { display: flex; align-items: center; gap: 6px; margin: 3px 0; font-size: 0.85rem; }
.dist-bar {
  background: var(--absent);
  color: #fff;
  padding: 2px 6px;
  min-width: 20px;
  text-align: right;
  border-radius: 2px;
  font-weight: bold;
}
.dist-bar.highlight { background: var(--correct); }

.countdown { text-align: center; }

.share-row { display: flex; gap: 8px; margin-top: 10px; }

.btn {
  flex: 1;
  padding: 12px;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: bold;
  cursor: pointer;
  color: #fff;
}
.btn.share { background: var(--correct); }
.btn.tg { background: #2aabee; }