/* App shell layout: canvas + screen stack + HUD grid.
   Portrait mobile is the primary layout; landscape and desktop scale up. */

#app {
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-rows: 1fr;
}

#gl-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: var(--z-canvas);
}

#gl-canvas:focus-visible {
  outline-offset: -3px;
  border-radius: 0;
}

/* Screens occupy the full viewport and stack above the canvas. */
.screen {
  position: absolute;
  inset: 0;
  z-index: var(--z-hud);
  display: flex;
  flex-direction: column;
  pointer-events: none; /* children re-enable as needed */
  padding:
    calc(var(--sp-4) + var(--safe-top))
    calc(var(--sp-4) + var(--safe-right))
    calc(var(--sp-4) + var(--safe-bottom))
    calc(var(--sp-4) + var(--safe-left));
}

.screen > * {
  pointer-events: auto;
}

.screen.is-hidden {
  display: none;
}

/* The planet stays dominant; editorial type occupies one quiet edge. */
#title-screen {
  justify-content: flex-end;
  background: linear-gradient(0deg, rgba(8, 10, 11, 0.72), transparent 34%);
}

.title-content { display: grid; justify-items: start; width: min(38rem, 100%); max-height: calc(100dvh - 5rem - var(--safe-top) - var(--safe-bottom));
  gap: var(--sp-4); overflow-y: auto; overscroll-behavior: contain; scrollbar-gutter: stable; pointer-events: none; touch-action: pan-y; }
.title-content > * { pointer-events: auto; }
.title-identity { max-width: 38rem; text-shadow: 0 2px 20px #080a0b; }
.title-index { color: var(--accent-gold); font-size: var(--fs-caption); letter-spacing: 0.16em; }
.title-index span { display: inline-block; margin-right: var(--sp-2); }
.title-identity h1 { margin-top: var(--sp-2); font-size: clamp(1.75rem, 6vw, 3.7rem); letter-spacing: -0.035em; }
.title-tagline { margin-top: var(--sp-1); color: var(--text-primary); font-size: var(--fs-lead); }
.title-premise { margin-top: var(--sp-2); max-width: 32rem; color: var(--text-secondary); }
.title-status { margin-top: var(--sp-2); color: var(--text-faint); font-size: var(--fs-caption); }
.title-actions { display: grid; justify-items: start; gap: var(--sp-2); }
.title-help { color: var(--text-faint); font-size: var(--fs-caption); letter-spacing: 0.02em; }

#memory-screen { justify-content: flex-end; }

@media (min-width: 900px) {
  #title-screen { justify-content: center; padding-left: max(4vw, var(--sp-6)); background: none; }
  .title-content { gap: var(--sp-5); }
}

@media (min-width: 600px) and (max-width: 899px) {
  #title-screen { padding-bottom: calc(var(--sp-5) + var(--safe-bottom)); }
  .title-identity, .title-actions { max-width: min(32rem, 74vw); }
}

/* In-run HUD: top metrics row + bottom action row; globe center is clear. */
#run-screen {
  justify-content: space-between;
}

.hud-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--sp-3);
}

.hud-bottom {
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
  gap: var(--sp-3);
}

.hud-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: min(25rem, 100%);
  gap: var(--sp-2);
}
.hud-metrics > .metric { min-width: 0; width: 100%; }

.hud-cluster {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
}


.speed-control {
  display: grid;
  gap: var(--sp-1);
  color: var(--text-secondary);
  font-size: var(--fs-caption);
}

.speed-control select {
  min-height: var(--touch-min);
  padding: 0 var(--sp-3);
  color: var(--text-primary);
  background: var(--bg-panel-solid);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-m);
  font: inherit;
}

@media (max-width: 390px) {
  .hud-metrics { gap: var(--sp-1); }
  .metric { padding: var(--sp-1) var(--sp-2); }
}

/* Evolution identity remains local context; scene navigation is global. */
.memory-bar {
  align-self: center; width: min(70rem, calc(100vw - 2 * var(--sp-4)));
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-4); border-radius: var(--radius-l); pointer-events: auto;
}
.memory-actions { display: flex; gap: var(--sp-1); flex-wrap: wrap; justify-content: flex-end; }
.memory-bar > div:first-child { display: flex; align-items: baseline; gap: var(--sp-3); }
.memory-bar .evolution-identity { display: grid; gap: 1px; align-items: start; }
.evolution-identity .eyebrow { margin: 0; }.evolution-identity strong { font-size: var(--fs-lead); }
.evolution-line { max-width: 26rem; }.memory-bar span { color: var(--text-secondary); font-size: var(--fs-caption); }.memory-bar b { color: var(--accent-gold); }
@media (max-width: 719px) {
  .memory-bar { width: calc(100vw - 2 * var(--sp-2)); display: grid; gap: var(--sp-2); align-items: end; padding: var(--sp-2) var(--sp-3); }
  .memory-bar > div:first-child { display: grid; gap: 0; }
  .memory-actions { flex-wrap: nowrap; overflow-x: auto; min-width: 0; width: 100%; }
  .memory-actions .btn { padding-inline: var(--sp-2); white-space: nowrap; font-size: var(--fs-caption); }
}

/* Diagnostics overlay: compact monospace readout, top-right. */
#diagnostics {
  position: absolute;
  top: calc(var(--sp-2) + var(--safe-top));
  right: calc(var(--sp-2) + var(--safe-right));
  z-index: var(--z-toast);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--text-secondary);
  background: rgba(4, 7, 13, 0.8);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-s);
  padding: var(--sp-2) var(--sp-3);
  max-width: 16rem;
  white-space: pre;
  pointer-events: none;
}