:root {
  --bg: #050913;
  --panel: #0d1632;
  --line: #2f4c80;
  --text: #eaf0ff;
  --cyan: #73f5ff;
  --pink: #ff72cb;
  --gold: #ffda7b;
  --mint: #89ffcc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  padding: 18px;
  color: var(--text);
  font-family: "Trebuchet MS", "Segoe UI", system-ui, sans-serif;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 18% -12%, #34206a 0%, transparent 45%),
    radial-gradient(circle at 88% 114%, #134968 0%, transparent 42%),
    var(--bg);
}

.cabinet {
  width: min(980px, 100%);
  background: linear-gradient(180deg, rgba(11, 18, 46, 0.97), rgba(8, 13, 35, 0.98));
  border: 2px solid #324f84;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 24px 58px rgba(0, 0, 0, 0.45), inset 0 0 0 1px rgba(115, 245, 255, 0.18);
}

.kicker {
  margin: 0;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 1.35px;
  color: var(--gold);
}

h1 {
  margin: 6px 0 0;
  color: var(--cyan);
  text-shadow: 0 0 16px rgba(115, 245, 255, 0.55);
}

.subtitle {
  margin: 8px 0 0;
  color: #b4c6f3;
}

.hud {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.hud div {
  background: rgba(14, 23, 56, 0.85);
  border: 1px solid rgba(116, 146, 226, 0.35);
  border-radius: 10px;
  padding: 8px 10px;
  text-align: center;
}

.hud span {
  display: block;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: #9eb4ea;
  letter-spacing: 0.5px;
}

.hud strong {
  display: block;
  margin-top: 5px;
  font-size: 1.1rem;
  color: #f3f8ff;
}

.panel {
  margin-top: 12px;
  background: rgba(11, 18, 47, 0.88);
  border: 1px solid rgba(116, 146, 226, 0.32);
  border-radius: 12px;
  padding: 12px;
}

.panel h2 {
  margin: 0;
  color: #ffd6f1;
  font-size: 1.05rem;
}

.hint {
  margin: 8px 0 0;
  color: #abc0f3;
  font-size: 0.88rem;
}

.targets {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.target {
  border: 1px dashed rgba(255, 218, 123, 0.55);
  border-radius: 10px;
  text-align: center;
  padding: 8px 4px;
  background: rgba(22, 33, 72, 0.74);
}

.target .emoji {
  font-size: 1.35rem;
  display: block;
}

.target .label {
  margin-top: 4px;
  font-size: 0.68rem;
  color: #e4ccff;
  letter-spacing: 0.45px;
  text-transform: uppercase;
}

.board-panel {
  padding: 10px;
}

.playfield {
  display: grid;
  grid-template-columns: 48px auto 48px;
  align-items: center;
  gap: 8px;
  justify-content: center;
}

.board {
  display: grid;
  grid-template-columns: repeat(5, 66px);
  gap: 7px;
}

.cell {
  width: 66px;
  aspect-ratio: 1;
  border-radius: 10px;
  border: 1px solid rgba(133, 168, 255, 0.35);
  background: linear-gradient(180deg, rgba(40, 59, 110, 0.86), rgba(24, 37, 78, 0.92));
  display: grid;
  place-items: center;
  font-size: 1.75rem;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.column-controls {
  margin: 8px auto;
  width: max-content;
  display: grid;
  grid-template-columns: repeat(5, 66px);
  gap: 7px;
}

.row-controls {
  display: grid;
  gap: 7px;
}

.shift-btn {
  border: 0;
  border-radius: 9px;
  cursor: pointer;
  min-height: 66px;
  font-weight: 700;
  color: #f5fbff;
  background: linear-gradient(180deg, rgba(60, 90, 162, 0.9), rgba(43, 65, 125, 0.95));
  box-shadow: 0 4px 10px rgba(3, 9, 28, 0.45);
}

.shift-btn:hover {
  filter: brightness(1.08);
}

.shift-btn:active {
  transform: translateY(1px);
}

.actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 700;
  letter-spacing: 0.45px;
  cursor: pointer;
}

.primary {
  background: linear-gradient(180deg, #7dffd7, #48ddb3);
  color: #032d28;
}

.ghost {
  background: rgba(20, 31, 67, 0.95);
  border: 1px solid rgba(155, 181, 255, 0.38);
  color: #dbe8ff;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.message {
  margin: 12px 2px 4px;
  color: #ffd5ef;
  min-height: 1.4em;
}

.solved .cell {
  animation: pulse 0.45s ease-in-out 2;
}

@keyframes pulse {
  0% { transform: scale(1); box-shadow: inset 0 0 0 1px rgba(255,255,255,0.06); }
  50% { transform: scale(1.04); box-shadow: 0 0 0 2px rgba(125, 255, 213, 0.5), 0 0 16px rgba(115, 245, 255, 0.35); }
  100% { transform: scale(1); }
}

@media (max-width: 780px) {
  .hud { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .playfield { grid-template-columns: auto; }
  .row-controls { grid-auto-flow: column; justify-content: center; grid-template-rows: 1fr; }
  .row-controls .shift-btn { min-height: 46px; min-width: 54px; }
}

@media (max-width: 520px) {
  body { padding: 10px; }
  .board { grid-template-columns: repeat(5, 52px); gap: 5px; }
  .cell { width: 52px; font-size: 1.45rem; }
  .column-controls { grid-template-columns: repeat(5, 52px); gap: 5px; }
}