:root {
  --bg: #050505;
  --green: #39ff14;
  --dim-green: #0a5c0a;
  --amber: #ffcc00;
  --red: #ff3b3b;
  --panel: #0d0d0d;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--green);
  font-family: 'Press Start 2P', monospace;
  image-rendering: pixelated;
  padding: 16px;
}

#game-container {
  width: min(560px, 96vw);
  text-align: center;
}

.screen {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.screen.active {
  display: flex;
}

.title {
  font-size: clamp(28px, 8vw, 44px);
  margin: 0;
  color: var(--green);
  text-shadow: 3px 3px 0 var(--dim-green), 6px 6px 0 #002200;
  letter-spacing: 4px;
}

.subtitle {
  margin: 0;
  font-size: clamp(10px, 2.5vw, 13px);
  color: var(--amber);
}

.hint {
  font-size: 10px;
  color: #7fbf7f;
  margin-top: 8px;
}

h2 {
  font-size: clamp(18px, 5vw, 26px);
  margin: 0;
  color: var(--amber);
  letter-spacing: 2px;
}

.btn {
  font-family: inherit;
  font-size: 13px;
  background: #000;
  color: var(--green);
  border: 3px solid var(--green);
  padding: 14px 22px;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--dim-green);
  min-width: 220px;
}

.btn:hover {
  background: var(--green);
  color: #000;
}

.btn:active {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--dim-green);
}

#highscore-list {
  list-style: none;
  counter-reset: rank;
  padding: 0;
  margin: 0;
  width: 100%;
  max-width: 360px;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#highscore-list li {
  counter-increment: rank;
  display: flex;
  justify-content: space-between;
  border-bottom: 2px dotted var(--dim-green);
  padding-bottom: 6px;
}

#highscore-list li::before {
  content: counter(rank) ". ";
  color: var(--amber);
  margin-right: 8px;
}

#highscore-list li.empty {
  justify-content: center;
  color: #7fbf7f;
  border-bottom: none;
}

#hud {
  display: flex;
  justify-content: space-between;
  width: min(520px, 92vw);
  font-size: 10px;
  color: var(--amber);
}

.hud-item {
  text-align: center;
  line-height: 1.8;
}

.hud-item span {
  color: var(--green);
  font-size: 13px;
}

#game-canvas {
  width: min(520px, 92vw);
  height: min(520px, 92vw);
  aspect-ratio: 1 / 1;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border: 4px solid var(--green);
  background: #000;
  box-shadow: 0 0 0 4px #000, 0 0 20px rgba(57, 255, 20, 0.35);
}

#banner {
  font-size: 12px;
  color: var(--red);
  min-height: 14px;
}

#banner.hidden {
  visibility: hidden;
}

#end-score {
  font-size: 16px;
  color: var(--green);
}

#new-highscore-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

#new-highscore-form.hidden {
  display: none;
}

.blink {
  color: var(--amber);
  animation: blink 1s step-start infinite;
  margin: 0;
  font-size: 12px;
}

@keyframes blink {
  50% { opacity: 0; }
}

#name-input {
  font-family: inherit;
  font-size: 14px;
  background: #000;
  color: var(--green);
  border: 3px solid var(--green);
  padding: 10px;
  text-align: center;
  width: 140px;
  text-transform: uppercase;
}

.hidden {
  display: none !important;
}