:root {
  --bg: #020502;
  --bg-soft: #071007;
  --panel: rgba(4, 22, 8, 0.88);
  --line: rgba(88, 255, 120, 0.34);
  --text: #b7ffb4;
  --text-dim: #6fcf7a;
  --accent: #66ff88;
  --danger: #ff7a7a;
  --shadow: rgba(18, 255, 81, 0.18);
  --frame: #19411d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(circle at top, rgba(22, 67, 29, 0.25), transparent 35%),
    linear-gradient(180deg, #040905 0%, #010201 100%);
  color: var(--text);
  font-family: "IBM Plex Mono", "Consolas", "Monaco", monospace;
}

.app-shell {
  width: min(100%, 1040px);
  display: grid;
  gap: 1.25rem;
}

.masthead {
  text-align: center;
  display: grid;
  gap: 0.35rem;
}

.masthead h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: 0.18em;
  color: var(--accent);
  text-shadow: 0 0 14px var(--shadow);
}

.boot-label,
.boot-copy,
.footer-copy,
.noscript-warning {
  margin: 0;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.game-shell {
  display: grid;
  gap: 0.75rem;
  width: min(100%, 1000px);
}

.screen-frame {
  position: relative;
  width: 100%;
  max-width: 1000px;
  aspect-ratio: 5 / 3;
  border: 2px solid var(--frame);
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg);
  box-shadow:
    0 0 0 1px rgba(119, 255, 128, 0.12),
    0 0 36px var(--shadow),
    inset 0 0 28px rgba(0, 0, 0, 0.6);
  animation: crt-flicker 3.2s infinite;
}

.screen-frame::before,
.screen-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.screen-frame::before {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 22%, transparent 78%, rgba(255, 255, 255, 0.03));
  mix-blend-mode: screen;
}

.screen-frame::after {
  background: repeating-linear-gradient(
    180deg,
    rgba(0, 0, 0, 0) 0,
    rgba(0, 0, 0, 0) 3px,
    rgba(96, 255, 129, 0.08) 4px
  );
  opacity: 0.24;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  background:
    radial-gradient(circle at top, rgba(17, 42, 22, 0.9), rgba(2, 5, 2, 1) 60%),
    linear-gradient(180deg, rgba(8, 18, 10, 1) 0%, rgba(1, 2, 1, 1) 100%);
}

.status-bar,
.message-panel {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(2px);
  box-shadow: inset 0 0 16px rgba(0, 0, 0, 0.28);
}

.status-bar {
  text-transform: uppercase;
  font-size: 0.92rem;
}

.status-bar span {
  white-space: nowrap;
}

.message-panel {
  display: grid;
  gap: 0.3rem;
  justify-content: stretch;
  min-height: 4.9rem;
}

.message-panel p {
  margin: 0;
}

#stateValue {
  color: var(--accent);
}

#stateValue[data-tone="danger"] {
  color: var(--danger);
}

#stateValue[data-tone="warn"] {
  color: #ffd479;
}

#subMessageValue {
  color: var(--text-dim);
}

.footer-copy {
  min-height: 1.2rem;
  text-align: center;
}

@keyframes crt-flicker {
  0%,
  100% {
    filter: brightness(1);
  }

  50% {
    filter: brightness(1.03);
  }

  52% {
    filter: brightness(0.98);
  }
}

@media (max-width: 640px) {
  body {
    padding: 1rem;
  }

  .status-bar {
    font-size: 0.76rem;
    gap: 0.4rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .message-panel {
    font-size: 0.9rem;
  }
}