:root{
  --bg:#121213;
  --panel:#1a1a1b;
  --text:#ffffff;
  --muted:#9aa0a6;
  --border:#3a3a3c;

  --tile: 52px;
  --gap: 8px;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 16px;
  background:var(--panel);
  border-bottom:1px solid #2a2a2b;
}
.title{font-size:22px;font-weight:800; letter-spacing:0.5px;}
.actions{display:flex; gap:10px; align-items:center;}

.btn{
  border:1px solid #2b2b2c;
  background:#2a2a2b;
  color:var(--text);
  padding:10px 12px;
  border-radius:10px;
  cursor:pointer;
  transition: transform 110ms ease, filter 140ms ease;
}
.btn:hover{filter:brightness(1.08)}
.btn:active{transform: scale(0.96)}
.btn--primary{background:#3b82f6; border-color:#2563eb}

.wrap{
  display:flex;
  flex-direction: column;
  align-items:center;
  gap: 18px;
  padding:24px 16px;
}

.board{
  display:grid;
  gap: var(--gap);
  perspective: 1000px;
}

.row{
  display:grid;
  gap: var(--gap);
}
.row.shake{
  animation: row-shake 360ms ease-in-out;
}

.tile{
  width: var(--tile);
  height: var(--tile);
  border: 2px solid var(--border);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:22px;
  font-weight:800;
  text-transform:uppercase;
  border-radius:10px;
  user-select:none;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  transition: transform 120ms ease;
}

.tile.filled{
  border-color:#565758;
}

.tile.active{
  outline: 2px solid #6b7280;
  outline-offset: 2px;
}
.tile.correct{
  background:#538d4e;
  border-color:#538d4e;
}
.tile.present{
  background:#b59f3b;
  border-color:#b59f3b;
}
.tile.absent{
  background:#3a3a3c;
  border-color:#3a3a3c;
}
.tile.reveal{
  animation: tile-reveal 300ms ease;
}
.tile.pop{
  animation: tile-pop 140ms ease;
}

@keyframes row-shake{
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-6px); }
  80% { transform: translateX(6px); }
}

@keyframes tile-reveal{
  0% { transform: rotateX(0); }
  45% { transform: rotateX(90deg); }
  55% { transform: rotateX(90deg); }
  100% { transform: rotateX(0); }
}

@keyframes tile-pop{
  0% { transform: scale(0.84); }
  70% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

.keyboard{
  width: min(640px, 100%);
  display:flex;
  flex-direction: column;
  gap: 8px;
}
.kb-row{
  display:flex;
  justify-content:center;
  gap: 6px;
}
.kb-key{
  min-width: 34px;
  height: 52px;
  border-radius: 8px;
  border: none;
  background: #818384;
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
  padding: 0 10px;
  transition: transform 90ms ease, filter 120ms ease;
}
.kb-key:hover{filter:brightness(1.08)}
.kb-key:active{transform: scale(0.94)}
.kb-key.wide{
  min-width: 64px;
  font-size: 12px;
}
.kb-key.correct{ background:#538d4e; }
.kb-key.present{ background:#b59f3b; }
.kb-key.absent{ background:#3a3a3c; }

.settings{
  max-width: 520px;
  margin: 12px auto 0 auto;
  background: var(--panel);
  border:1px solid #2a2a2b;
  padding: 12px 14px;
  border-radius: 14px;
}
.settings__row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 0;
  gap:12px;
}
.settings label{color:var(--muted); font-weight:600}
.settings__row select,
.settings__row input{
  width: 140px;
  padding:10px;
  border-radius:10px;
  border:1px solid #2b2b2c;
  background:#121213;
  color:var(--text);
  transition: border-color 120ms ease, transform 100ms ease;
}
.settings__row input:focus{
  border-color:#4b5563;
  transform: translateY(-1px);
}
.settings__hint{
  margin: 0 0 8px 0;
  color: var(--muted);
  font-size: 13px;
}
.settings__lists{
  padding: 10px 0 14px;
}
.settings__lists-title{
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 8px;
}
.wordlists{
  display:flex;
  flex-direction: column;
  gap: 8px;
}
.wordlist-option{
  display:flex;
  align-items:center;
  gap: 8px;
  font-size: 14px;
}
.wordlist-option input{
  width: auto;
}
.settings__upload{
  padding: 0 0 12px;
}
.settings__upload label{
  display:block;
  color:var(--muted);
  font-weight:600;
  margin-bottom:8px;
}
.settings__upload input[type="file"]{
  width:100%;
  padding:8px;
  border-radius:10px;
  border:1px solid #2b2b2c;
  background:#121213;
  color:var(--text);
  transition: border-color 120ms ease;
}
.settings__upload input[type="file"]:focus{
  border-color:#4b5563;
}

.result-overlay{
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.62);
  display:flex;
  align-items:center;
  justify-content:center;
  z-index: 30;
  padding: 20px;
}
.result-card{
  width: min(680px, 100%);
  background: linear-gradient(145deg, #1a1a1b, #232326);
  border: 1px solid #3a3a3c;
  border-radius: 18px;
  padding: 24px;
  text-align:center;
  animation: result-card-in 280ms ease;
}
.result-title{
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 14px;
}
.result-word{
  display:flex;
  justify-content:center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.result-letter{
  width: 56px;
  height: 56px;
  border-radius: 10px;
  border: 2px solid #538d4e;
  background:#538d4e;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size: 32px;
  font-weight: 900;
  animation: result-letter-in 440ms both;
}

@keyframes result-card-in{
  0% { transform: scale(0.9); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes result-letter-in{
  0% { transform: translateY(24px) scale(0.8); opacity: 0; }
  60% { transform: translateY(-4px) scale(1.05); opacity: 1; }
  100% { transform: translateY(0) scale(1); opacity: 1; }
}

.hidden{display:none}