:root {
  --bg: #07090d;
  --surface: #10141c;
  --surface-2: #161c27;
  --text: #e7ecf3;
  --text-muted: #8a93a6;
  --accent: #ffb454;       /* warm amber — lamp / sun */
  --accent-2: #6fd08c;     /* living green */
  --border: #232b39;
  --danger: #ff6b6b;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --space-xs: 6px;
  --space-sm: 10px;
  --space-md: 16px;
  --space-lg: 24px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeSpeed;
}

#app {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(120% 80% at 50% -10%, #131a26 0%, #090b10 55%, #05060a 100%);
}

#world {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
  image-rendering: pixelated;
  touch-action: none;
}
#world.dragging { cursor: grabbing; }

/* soft cinematic edge */
.vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(120% 120% at 50% 50%, transparent 62%, rgba(0,0,0,0.45) 100%);
  mix-blend-mode: multiply;
}

/* ---------- HUD ---------- */
.hud {
  position: absolute;
  z-index: 5;
  pointer-events: none;
  user-select: none;
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  animation: hud-in 0.7s cubic-bezier(.2,.7,.2,1) both;
}
.hud .btn, .hud .presence, .hud .actions { pointer-events: auto; }

.hud-tl { top: var(--space-md); left: var(--space-md); }
.hud-tr { top: var(--space-md); right: var(--space-md); text-align: right; display: flex; flex-direction: column; align-items: flex-end; gap: var(--space-sm); }
.hud-bl { bottom: var(--space-md); left: var(--space-md); display: grid; grid-template-columns: auto auto; gap: 2px var(--space-md); color: var(--text-muted); }
.hud-br { bottom: var(--space-md); right: var(--space-md); color: var(--text-muted); opacity: .75; }

.brand {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--text);
  text-shadow: 0 0 18px rgba(255,180,84,0.25);
}
.hud-tl .sub { color: var(--accent); font-weight: 500; }

.hud-bl .k { color: #4f5a6e; }
.hud-bl span:not(.k) { color: var(--text); }

.presence {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  border: 1px solid var(--border);
  border-radius: 999px;
  backdrop-filter: blur(8px);
  font-variant-numeric: tabular-nums;
}
.presence .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-2) 70%, transparent);
  animation: pulse 2.4s infinite;
}
.presence #visitorCount { color: var(--accent-2); font-weight: 700; }

.actions { display: flex; gap: var(--space-xs); }
.btn {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: border-color .15s ease, transform .12s ease, background .15s ease;
}
.btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.btn.solid { background: var(--accent); color: #1a1206; border-color: var(--accent); font-weight: 700; }
.btn.solid:hover { filter: brightness(1.08); }

/* ---------- Cell inspector tooltip ---------- */
#tooltip {
  position: fixed;
  z-index: 7;
  display: none;
  min-width: 168px;
  max-width: 240px;
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 40px rgba(0,0,0,0.55);
  backdrop-filter: blur(10px);
  pointer-events: none;
  animation: dlg-in .12s ease;
}
#tooltip .th {
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
  color: var(--accent);
}
#tooltip .th { position: relative; padding-right: 22px; }
#tooltip .tr { display: flex; justify-content: space-between; gap: 12px; }
#tooltip .tk { color: var(--text-muted); }
#tooltip .tv { color: var(--text); font-variant-numeric: tabular-nums; }
#tooltip .tbtns { display: flex; gap: 6px; margin-top: 10px; }
#tooltip .tbtn {
  pointer-events: auto;
  flex: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 5px 8px;
  cursor: pointer;
  transition: border-color .15s ease;
}
#tooltip .tbtn:hover { border-color: var(--accent); }
#tooltip .tbtn.solid { background: var(--accent); color: #1a1206; border-color: var(--accent); font-weight: 700; }
#tooltip .tclose {
  pointer-events: auto;
  position: absolute;
  top: -2px; right: -2px;
  width: 18px; height: 18px;
  display: grid; place-items: center;
  font-size: 12px; line-height: 1;
  color: var(--text-muted);
  background: transparent;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
}
#tooltip .tclose:hover { color: var(--text); background: var(--surface-2); }

/* ---------- Control bar (manual hero control) ---------- */
#controlbar {
  position: fixed;
  z-index: 8;
  left: 50%; bottom: 22px;
  transform: translateX(-50%);
  display: none;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 12px;
  max-width: min(680px, calc(100vw - 16px));
  padding: 8px 14px;
  font-size: 12px;
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid var(--accent);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  backdrop-filter: blur(10px);
  animation: hud-in .2s ease;
}
#controlbar .cb-keys { color: var(--text-muted); display: inline-flex; flex-wrap: wrap; align-items: center; gap: 2px 7px; line-height: 1.5; }
#controlbar .cb-label { font-weight: 600; }
@media (max-width: 560px) {
  #controlbar { gap: 4px 8px; padding: 6px 10px; bottom: 14px; font-size: 11px; }
  #controlbar .cb-keys { gap: 2px 6px; }
  #controlbar kbd { font-size: 10px; padding: 1px 4px; }
  #controlbar .cb-release { font-size: 11px; padding: 5px 12px; }
}
@media (max-width: 400px) {
  #controlbar { gap: 4px 7px; padding: 5px 9px; border-radius: 12px; }
  #controlbar .cb-label { display: none; }
  #controlbar .cb-release { font-size: 10px; padding: 4px 10px; }
}
#controlbar kbd { margin-right: 2px; }
#controlbar .cb-release {
  pointer-events: auto;
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
  color: #1a1206; background: var(--accent);
  border: 0; border-radius: 999px; padding: 6px 14px; cursor: pointer;
}

/* ---------- Dialogs ---------- */
dialog {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--radius-md);
  max-width: 460px;
  width: calc(100vw - 32px);
  padding: 0;
  box-shadow: 0 24px 80px rgba(0,0,0,0.6);
}
dialog::backdrop {
  background: rgba(4,5,8,0.55);
  backdrop-filter: blur(3px);
}
dialog[open] { animation: dlg-in .22s cubic-bezier(.2,.7,.2,1); }
dialog article { padding: var(--space-lg); }
dialog h2 { margin: 0 0 var(--space-sm); font-size: 18px; letter-spacing: 0.04em; cursor: move; }
dialog p { margin: 0 0 var(--space-sm); color: var(--text); font-size: 13px; line-height: 1.6; }
dialog p.muted { color: var(--text-muted); font-size: 12px; }
dialog em { color: var(--accent); font-style: normal; }
dialog strong { color: var(--accent-2); }
dialog .keys { list-style: none; margin: 0 0 var(--space-md); padding: 0; display: grid; gap: 6px; }
dialog .keys li { font-size: 12px; color: var(--text-muted); }
kbd {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 6px;
  margin-right: 4px;
  color: var(--text);
}
dialog form { margin-top: var(--space-md); }

/* ---------- motion ---------- */
@keyframes hud-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
@keyframes dlg-in { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: none; } }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-2) 60%, transparent); }
  70% { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

@media (prefers-reduced-motion: reduce) {
  .hud, dialog[open] { animation: none; }
  .presence .dot { animation: none; }
}

@media (max-width: 560px) {
  .hud-br { display: none; }
  .brand { font-size: 18px; }
}

/* blocking loading modal + progress bar (first load + N regenerate) */
.loading {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  background: rgba(6, 8, 14, 0.86); backdrop-filter: blur(3px);
}
.loading[hidden] { display: none; }
.loading-card {
  display: flex; flex-direction: column; gap: 14px; align-items: center;
  padding: 28px 40px; border-radius: 14px;
  background: #0c1018; border: 1px solid #1c2533; box-shadow: 0 18px 60px rgba(0,0,0,0.55);
  font-family: 'Noto Sans Mono', ui-monospace, monospace;
}
.loading-title { color: #cfe0ec; font-size: 22px; letter-spacing: 6px; }
.loading-msg { color: #6f8196; font-size: 13px; min-height: 16px; }
.loading-track { width: 280px; height: 8px; border-radius: 6px; background: #182030; overflow: hidden; }
.loading-bar {
  height: 100%; width: 0%; border-radius: 6px;
  background: linear-gradient(90deg, #4aa6ff, #6fd08c);
  transition: width 0.25s ease;
}