/* The stage grows with the window, keeping the canvas at 1000 × 560. */
.nw-header,
.nw {
  max-width: max(64rem, min(100%, calc((100vh - 9rem) * 1.7857 + 2rem)));
}

.nw {
  margin: 0 auto;
  padding: 0 1rem 2rem;
  -webkit-user-select: none;
  user-select: none;
}

.nw-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
}

.nw-stage > canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1000 / 560;
  touch-action: manipulation;
}

/* Fullscreen: letterbox the canvas at its aspect ratio. */
.nw-stage:fullscreen {
  align-items: center;
  border: 0;
  border-radius: 0;
}

.nw-stage:fullscreen > canvas {
  width: min(100vw, 178.57vh);
}

/* On narrow screens, menus get room to breathe around the small canvas. */
@media (max-width: 640px) {
  .nw-stage.nw-open {
    min-height: min(36rem, calc(100svh - 7rem));
  }
}

.nw-hint {
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.nw-rotate {
  display: none;
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 640px) and (orientation: portrait) {
  .nw-rotate {
    display: block;
  }
}

.nw-overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgb(0 0 0 / 0.62);
  color: #fff;
  text-align: center;
  overflow-y: auto;
}

/* Menus over the live demo battle and results over the fallen castle. */
.nw-overlay.light {
  background: radial-gradient(ellipse at center, rgb(0 0 0 / 0.7), rgb(0 0 0 / 0.35));
}

.nw-overlay.open {
  display: flex;
}

.nw-overlay > div {
  margin: auto;
  max-width: 40rem;
}

.nw-overlay > .nw-wide {
  max-width: 48rem;
}

.nw-overlay h2 {
  font-size: clamp(1.4rem, 5vw, 2.5rem);
  margin: 0 0 0.25rem;
  text-shadow: 0 2px 8px rgb(0 0 0 / 0.6);
}

.nw-overlay .nw-title {
  font-size: clamp(1.8rem, 7vw, 3.75rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: linear-gradient(#fef9c3, #f59e0b);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 3px 0 rgb(0 0 0 / 0.6));
}

.nw-overlay p {
  margin: 0.25rem 0 0.75rem;
  color: #e7e5e4;
}

.nw-overlay .row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin: 0.5rem 0;
}

.nw-overlay button {
  font: inherit;
  padding: 0.5rem 1.1rem;
  font-weight: 600;
  background: #fff;
  color: #1c1917;
  border: 0;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
}

.nw-overlay button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgb(0 0 0 / 0.35);
}

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

.nw-overlay button small {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  opacity: 0.75;
}

.nw-overlay button.big {
  min-width: 9rem;
  padding: 0.7rem 1.4rem;
  font-size: 1.1rem;
}

.nw-overlay button.primary {
  background: var(--accent);
  color: #fff;
}

.nw-overlay .help {
  font-size: 0.85rem;
  color: #d6d3d1;
}

/* Campaign level select. */
.nw-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.5rem;
  margin: 0.75rem 0 0.5rem;
}

.nw-overlay .nw-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.5rem 0.25rem;
  background: rgb(255 255 255 / 0.1);
  color: #fff;
  border: 2px solid transparent;
}

.nw-overlay .nw-card.sel {
  border-color: #facc15;
  background: rgb(250 204 21 / 0.15);
}

.nw-overlay .nw-card.locked {
  opacity: 0.6;
}

.nw-portrait {
  flex: none;
  width: clamp(2.75rem, 8vw, 5.5rem);
  height: clamp(2.75rem, 8vw, 5.5rem);
}

.nw-name {
  font-size: 0.8rem;
  line-height: 1.1;
}

.nw-sub {
  font-size: 0.7rem;
  font-weight: 500;
  color: #d6d3d1;
}

.nw-stars {
  color: #facc15;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
}

.nw-tag {
  display: inline-block;
  padding: 0 0.4rem;
  border-radius: 0.3rem;
  background: rgb(250 204 21 / 0.2);
  color: #fde68a;
  font-size: 0.8rem;
}

.nw-detail {
  padding: 0.5rem 0.75rem;
  border-radius: 0.6rem;
  background: rgb(0 0 0 / 0.35);
}

.nw-detail p {
  margin: 0.2rem 0;
}

.nw-settings {
  display: grid;
  gap: 0.4rem;
  margin: 0.75rem auto;
  max-width: 18rem;
}

.nw-bigstars {
  font-size: clamp(2rem, 7vw, 3.25rem);
  letter-spacing: 0.15em;
  line-height: 1;
}

.nw-bigstars span {
  display: inline-block;
  color: rgb(255 255 255 / 0.2);
}

.nw-bigstars span.on {
  color: #facc15;
  text-shadow: 0 0 18px rgb(250 204 21 / 0.7);
  animation: nw-star 0.5s backwards cubic-bezier(0.3, 1.6, 0.5, 1);
}

@keyframes nw-star {
  from {
    transform: scale(2.4) rotate(-30deg);
    opacity: 0;
  }
}

@media (max-width: 640px) {
  .nw-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .nw-overlay {
    padding: 0.5rem;
    font-size: 0.9rem;
  }

  .nw-overlay .nw-grid {
    gap: 0.3rem;
    margin: 0.4rem 0;
  }

  .nw-overlay .nw-card {
    padding: 0.3rem 0.2rem;
  }

  .nw-detail .help {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nw-bigstars span.on {
    animation: none;
  }
}