:root {
  color-scheme: dark;
  --bg: #11140f;
  --panel: #1b2118;
  --panel-2: #252b1d;
  --line: #38422d;
  --text: #f4f1de;
  --muted: #c3b99b;
  --gold: #d6ae54;
  --green: #6fbf73;
  --blue: #5bc0eb;
  --red: #d95d39;
  --violet: #a97cff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 12%, rgba(111, 191, 115, 0.18), transparent 30%),
    radial-gradient(circle at 82% 8%, rgba(214, 174, 84, 0.15), transparent 26%),
    linear-gradient(135deg, #11140f, #1b1715 52%, #101514);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button {
  border: 1px solid rgba(244, 241, 222, 0.16);
  background: #2f3526;
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

button:hover {
  transform: translateY(-1px);
  border-color: rgba(214, 174, 84, 0.7);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
  transform: none;
}

.app {
  width: min(1220px, calc(100vw - 24px));
  margin: 0 auto;
  padding: 18px 0;
}

.game-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 14px;
}

.topbar,
.controls {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid rgba(244, 241, 222, 0.12);
  background: rgba(27, 33, 24, 0.86);
  border-radius: 8px;
  padding: 12px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--gold);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin: 0;
  font-size: clamp(1.35rem, 2.4vw, 2.25rem);
}

.stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.stats span {
  min-width: 98px;
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(17, 20, 15, 0.72);
  color: var(--muted);
  text-align: center;
}

.stats strong {
  color: var(--text);
}

.stage-wrap {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(244, 241, 222, 0.14);
  border-radius: 8px;
  background: #13180f;
  aspect-ratio: 16 / 10;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(10, 12, 8, 0.62);
}

.overlay.hidden {
  display: none;
}

.panel {
  width: min(420px, 100%);
  border: 1px solid rgba(214, 174, 84, 0.36);
  background: rgba(27, 33, 24, 0.94);
  border-radius: 8px;
  padding: 22px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.panel h2 {
  margin-bottom: 8px;
  font-size: 2rem;
}

.primary {
  width: 100%;
  padding: 12px 16px;
  background: linear-gradient(135deg, #b97b39, #d6ae54);
  color: #17120a;
  font-weight: 900;
}

.tower-palette {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 8px;
  flex: 1;
}

.tower-card {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: center;
  gap: 2px 8px;
  min-height: 62px;
  padding: 8px;
  text-align: left;
}

.tower-card.active {
  border-color: var(--gold);
  background: #3b3522;
}

.tower-card strong,
.tower-card small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tower-card small {
  color: var(--muted);
}

.gem {
  grid-row: span 2;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  box-shadow: 0 0 16px currentColor;
}

.spark { color: var(--gold); background: var(--gold); }
.frost { color: var(--blue); background: var(--blue); }
.ember { color: var(--red); background: var(--red); }
.arcane { color: var(--violet); background: var(--violet); }

.actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(92px, 1fr));
  gap: 8px;
  min-width: 220px;
}

.actions button {
  min-height: 36px;
  padding: 7px 10px;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid rgba(244, 241, 222, 0.12);
  background: rgba(27, 33, 24, 0.86);
  border-radius: 8px;
  padding: 14px;
}

.side-panel h3 {
  margin-bottom: 6px;
}

.side-panel p {
  color: var(--muted);
  line-height: 1.45;
}

.selected-info,
.tips {
  border-top: 1px solid rgba(244, 241, 222, 0.12);
  padding-top: 12px;
}

.selected-info button {
  width: 100%;
  margin-top: 8px;
  padding: 9px 10px;
}

@media (max-width: 900px) {
  .game-shell {
    grid-template-columns: 1fr;
  }

  .topbar,
  .controls {
    align-items: stretch;
    flex-direction: column;
  }

  .stats {
    justify-content: stretch;
  }

  .stats span {
    flex: 1 1 42%;
  }

  .tower-palette {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .actions {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .app {
    width: calc(100vw - 12px);
    padding: 6px 0;
  }

  .topbar,
  .controls,
  .side-panel {
    padding: 9px;
  }

  .stage-wrap {
    aspect-ratio: 4 / 3;
  }

  .tower-card {
    grid-template-columns: 22px minmax(0, 1fr);
    min-height: 56px;
    padding: 7px;
  }

  .tower-card strong {
    font-size: 0.88rem;
  }

  .tower-card small {
    font-size: 0.72rem;
  }
}