/* Theme controls, clean hero and scalable signal universe. */
#site-controls {
  position: fixed;
  top: max(1rem, env(safe-area-inset-top, 0px));
  right: max(1rem, env(safe-area-inset-right, 0px));
  z-index: 55;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
#site-controls #language-switch { position: static; }
#theme-switch {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  background: rgba(4, 7, 16, 0.72);
  backdrop-filter: blur(12px);
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.09em;
}
#theme-switch span { color: var(--muted); }
#theme-switch button {
  padding: 0.2rem 0.3rem;
  border: 0;
  background: none;
  color: var(--muted);
  font: inherit;
  cursor: pointer;
}
#theme-switch button[aria-pressed="true"] { color: var(--acc); }
#theme-switch button:focus-visible { outline: 1px solid var(--acc); outline-offset: 3px; }

/* Only the original particle planet remains; no portal, haze or aurora. */
#world-aurora, #hero-portal { display: none !important; }

.constellation-core {
  pointer-events: auto;
  cursor: pointer;
  z-index: 3;
  transition: background 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.constellation-core:hover, .constellation-core:focus-visible {
  outline: none;
  border-color: var(--acc);
  background: color-mix(in srgb, var(--acc) 8%, transparent);
  box-shadow: 0 0 48px color-mix(in srgb, var(--acc) 24%, transparent), inset 0 0 24px color-mix(in srgb, var(--acc) 12%, transparent);
}

.signal-universe {
  position: fixed;
  inset: 0;
  z-index: 100;
  overflow: hidden;
  background: #02040d;
  color: var(--ink);
  cursor: auto;
}
.signal-universe[hidden] { display: none; }
#universe-canvas { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; }
.universe-top {
  position: absolute;
  top: max(1.2rem, env(safe-area-inset-top, 0px));
  left: max(1.2rem, env(safe-area-inset-left, 0px));
  right: max(1.2rem, env(safe-area-inset-right, 0px));
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  pointer-events: none;
}
.universe-heading { margin: 0; font: 0.62rem var(--f-mono); letter-spacing: 0.22em; color: var(--acc); }
.universe-top h2 { margin: 0.45rem 0 0.2rem; font: 600 clamp(1.45rem, 4vw, 2.5rem) var(--f-hero); letter-spacing: -0.04em; }
#universe-count { margin: 0; color: var(--muted); font: 0.68rem var(--f-mono); }
.universe-close, .universe-tool, #universe-load {
  border: 1px solid var(--line);
  background: rgba(4, 7, 16, 0.82);
  color: var(--ink);
  font: 0.68rem var(--f-mono);
  letter-spacing: 0.08em;
  cursor: pointer;
  backdrop-filter: blur(12px);
}
.universe-close { padding: 0.7rem 0.85rem; pointer-events: auto; }
.universe-close:hover, .universe-tool:hover, #universe-load:hover { border-color: var(--acc); color: var(--acc); }
.universe-close:focus-visible, .universe-tool:focus-visible, #universe-load:focus-visible { outline: 1px solid var(--acc); outline-offset: 3px; }
.universe-help {
  position: absolute;
  left: 50%;
  bottom: max(1.2rem, env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  width: max-content;
  max-width: calc(100% - 2rem);
  margin: 0;
  text-align: center;
  color: var(--muted);
  font: 0.62rem var(--f-mono);
  letter-spacing: 0.05em;
  pointer-events: none;
}
.universe-tools {
  position: absolute;
  right: max(1.2rem, env(safe-area-inset-right, 0px));
  top: 50%;
  display: grid;
  gap: 0.45rem;
}
.universe-tool { width: 2.5rem; height: 2.5rem; font-size: 1rem; }
.universe-sector {
  position: absolute;
  left: 50%;
  bottom: max(3.7rem, calc(env(safe-area-inset-bottom, 0px) + 3.2rem));
  transform: translateX(-50%);
}
#universe-load { padding: 0.7rem 1rem; white-space: nowrap; }
#universe-load[hidden] { display: none; }
#universe-load:disabled { opacity: 0.5; cursor: wait; }
.universe-empty {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(30rem, calc(100% - 3rem));
  margin: 0;
  text-align: center;
  color: var(--muted);
  font: 0.75rem/1.8 var(--f-mono);
  pointer-events: none;
}
.universe-empty[hidden] { display: none; }
.universe-detail {
  position: absolute;
  left: max(1.2rem, env(safe-area-inset-left, 0px));
  bottom: max(4.6rem, calc(env(safe-area-inset-bottom, 0px) + 4rem));
  width: min(24rem, calc(100% - 5.5rem));
  max-height: 42vh;
  overflow-y: auto;
  padding: 1.1rem 2.4rem 1.1rem 1.1rem;
  border: 1px solid var(--line);
  background: rgba(4, 7, 16, 0.94);
  backdrop-filter: blur(16px);
}
.universe-detail[hidden] { display: none; }
.universe-detail .message-body { font-size: 0.88rem; }
#universe-detail-close { position: absolute; top: 0.35rem; right: 0.5rem; border: 0; background: none; color: var(--muted); font-size: 1.2rem; cursor: pointer; }

@media (max-width: 800px) {
  #site-controls { top: max(0.6rem, env(safe-area-inset-top, 0px)); right: max(0.6rem, env(safe-area-inset-right, 0px)); gap: 0.3rem; }
  #site-controls #language-switch, #theme-switch { padding: 0.35rem 0.4rem; font-size: 0.56rem; }
  .universe-help { font-size: 0.55rem; }
  .universe-top h2 { font-size: 1.45rem; }
  .universe-detail { max-height: 35vh; }
}
@media (prefers-reduced-motion: reduce) {
  .constellation-core { transition: none; }
}