:root {
  --bg: #07121a;
  --bg2: #0f2231;
  --panel: #122d40;
  --panel-2: #183b52;
  --ink: #daf6ff;
  --muted: #9dc5d2;
  --accent: #f2b84b;
  --accent-2: #5be0bc;
  --danger: #ff6b6b;
  --line: rgba(218, 246, 255, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  color: var(--ink);
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background:
    radial-gradient(1000px 500px at 0% 0%, #1a4057 0%, transparent 65%),
    radial-gradient(1000px 600px at 100% 100%, #102335 0%, transparent 70%),
    linear-gradient(145deg, var(--bg), var(--bg2));
}

.app-shell {
  height: 100%;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 10px;
  padding: 10px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  background: linear-gradient(180deg, #16384d, #102737);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 14px;
}

.brand h1 {
  margin: 0;
  letter-spacing: 0.04em;
  font-size: 1.35rem;
}

.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.hud {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.hud-item {
  min-width: 92px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.2);
  padding: 6px 8px;
}

.hud-item span {
  color: var(--muted);
  font-size: 0.75rem;
  display: block;
}

.hud-item strong {
  font-size: 1rem;
}

.controls-row {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, #133448, #102938);
  padding: 8px 10px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.left-controls,
.right-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

button,
select,
input[type="range"] {
  font: inherit;
}

button,
select,
label {
  color: var(--ink);
}

button,
select {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 7px 10px;
}

button:hover {
  cursor: pointer;
  border-color: var(--accent-2);
}

.speed-wrap,
.mode-wrap,
.level-wrap {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  background: rgba(0, 0, 0, 0.17);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 5px 8px;
}

#speedInput {
  width: 90px;
}

.objective {
  max-width: 420px;
  font-size: 0.87rem;
  color: var(--muted);
}

.workspace {
  min-height: 0;
  display: grid;
  grid-template-columns: 290px 1fr 290px;
  gap: 10px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  padding: 10px;
  overflow: auto;
}

.panel h2,
.panel h3 {
  margin: 0 0 8px;
}

.palette p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.84rem;
}

.palette-list {
  display: grid;
  gap: 8px;
}

.palette-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px;
  background: rgba(0, 0, 0, 0.17);
  display: grid;
  gap: 4px;
  cursor: grab;
}

.palette-card:hover,
.palette-card.active {
  border-color: var(--accent);
}

.palette-card .meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.74rem;
  color: var(--muted);
}

.board-wrap {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(180deg, #0a1a25, #0b1721);
}

#lifeCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(5, 14, 20, 0.55);
  font-size: 1.1rem;
  text-align: center;
  padding: 20px;
}

.hidden {
  display: none;
}

#inspectorBody {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.2);
  padding: 8px;
  min-height: 140px;
}

#inspectorBody p {
  margin: 0 0 6px;
  color: var(--muted);
}

ul {
  margin: 0;
  padding-left: 20px;
}

li {
  margin-bottom: 4px;
  color: var(--muted);
}

kbd {
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 5px;
  color: var(--ink);
  background: rgba(0, 0, 0, 0.25);
}

@media (max-width: 1200px) {
  .workspace {
    grid-template-columns: 250px 1fr 250px;
  }
}

@media (max-width: 1000px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(360px, 1fr) auto;
  }

  .palette,
  .inspector {
    max-height: 220px;
  }
}