:root{
  --bg:#000;
  --fg:#ff0;
  --muted:#bbb;
  --panel:#111;
  --panel2:#181818;
  --btn:#222;
  --btn2:#2a2a2a;
  --border:#333;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

#app{
  height:100%;
  display:flex;
  flex-direction:column;
}

#topbar{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:14px;
  border-bottom:1px solid var(--border);
  background: var(--panel);
}

#status{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  color: var(--muted);
  font-size: 14px;
}

#status strong{ color: #fff; font-weight: 700; }

#controls{
  display:flex;
  gap:10px;
}

button{
  background: var(--btn);
  color: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14px;
  cursor:pointer;
}

button:hover{ background: var(--btn2); }
button:disabled{ opacity:.5; cursor:not-allowed; }

#letter{
  flex:1;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  line-height:1;
  font-size: 40vh;
  user-select:none;
}

#hint{
  padding:10px 14px 14px 14px;
  color: var(--muted);
  display:flex;
  gap:18px;
  flex-wrap:wrap;
  font-size: 13px;
}

/* Modal */
.hidden{ display:none !important; }

#modalBackdrop{
  position:fixed; inset:0;
  background: rgba(0,0,0,.6);
}

#modal{
  position:fixed;
  left:50%; top:50%;
  transform: translate(-50%,-50%);
  width:min(920px, 94vw);
  max-height: 90vh;
  overflow:auto;
  background: var(--panel2);
  border:1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
}

#modalHeader{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding-bottom: 8px;
  border-bottom:1px solid var(--border);
}

#modalHeader h2{
  margin:0;
  color:#fff;
  font-size: 18px;
}

#closeModal{
  padding: 6px 10px;
  border-radius: 10px;
}

.row{
  margin-top: 14px;
  padding: 12px;
  border:1px solid var(--border);
  border-radius: 12px;
  background: #141414;
}

.row label{
  display:block;
  color:#fff;
  font-weight:700;
  margin-bottom: 8px;
}

.row input[type="number"]{
  width: 110px;
  padding: 8px;
  border-radius: 10px;
  border:1px solid var(--border);
  background:#0f0f0f;
  color:#fff;
}

.row input[type="range"]{
  width: min(520px, 100%);
  margin-top: 10px;
}

.seg{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
  color: var(--muted);
}

.quick{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.qbtn{
  padding: 8px 12px;
}

#grid{
  display:grid;
  grid-template-columns: repeat(13, minmax(0, 1fr));
  gap: 8px;
}

.sym{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  padding: 8px 6px;
  border:1px solid var(--border);
  border-radius: 10px;
  background:#101010;
  color:#fff;
  user-select:none;
  cursor:pointer;
}

.sym input{ transform: scale(1.1); }

#warning{
  margin-top: 10px;
  color: #ffb000;
  font-weight: 700;
}

#modalFooter{
  display:flex;
  justify-content:flex-end;
  gap:10px;
  padding-top: 14px;
}