:root {
  --bg: #05060f;
  --cyan: #4dd8ff;
  --pink: #ff4d88;
  --gold: #ffd44d;
  --text: #e8e4f2;
  --dim: #8b83a8;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#stage {
  position: relative;
  width: min(100vw - 20px, calc((100vh - 40px) * 1.6));
  height: min(100vh, calc(100vw / 1.6));
  aspect-ratio: 1.6 / 1;
  overflow: hidden;
}

#game-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* HUD */
#hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 8px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  pointer-events: none;
  z-index: 5;
}

#hud .hud-left {
  display: flex;
  gap: 14px;
  align-items: center;
}

#hud .hud-item {
  color: var(--dim);
}

#hud .val {
  color: var(--cyan);
  font-weight: 700;
}

#hud #hud-score {
  font-size: 16px;
  color: var(--gold);
}

#hud #hud-best {
  color: var(--dim);
}

#hud #hud-level {
  color: var(--cyan);
}

#hud #hud-lives {
  color: var(--pink);
  letter-spacing: 2px;
}

#mute-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: var(--dim);
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  pointer-events: auto;
}

#mute-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.2);
}

#hud .hud-right {
  display: flex;
  gap: 8px;
  align-items: center;
}

.icon-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid rgba(77, 216, 255, 0.3);
  background: rgba(5, 6, 15, 0.6);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  display: grid;
  place-items: center;
  text-decoration: none;
  line-height: 1;
  pointer-events: auto;
}

.icon-btn:hover {
  background: rgba(77, 216, 255, 0.18);
}

/* Screens */
.screen {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(5, 6, 15, 0.92);
  z-index: 20;
  gap: 14px;
}

.screen.translucent {
  background: rgba(5, 6, 15, 0.45);
}

.screen h1 {
  font-size: 38px;
  letter-spacing: 6px;
  font-weight: 900;
  background: linear-gradient(90deg, var(--gold), var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.screen h2 {
  font-size: 24px;
  color: var(--gold);
  letter-spacing: 4px;
  font-weight: 900;
}

.screen p {
  font-size: 14px;
  color: var(--dim);
  text-align: center;
  line-height: 1.6;
  max-width: 420px;
}

.screen .level-name {
  font-size: 18px;
  color: var(--cyan);
  letter-spacing: 4px;
  font-weight: 700;
}

.screen .dim {
  font-size: 12px;
}

.count {
  font-size: 64px;
  font-weight: 900;
  color: var(--gold);
  text-shadow: 0 0 24px rgba(255, 212, 77, 0.6);
}

.btn {
  padding: 10px 28px;
  border: 1px solid var(--cyan);
  background: rgba(77, 216, 255, 0.1);
  color: var(--cyan);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn:hover {
  background: rgba(77, 216, 255, 0.25);
  transform: translateY(-2px);
}

.btn.pink {
  border-color: var(--pink);
  color: var(--pink);
  background: rgba(255, 77, 136, 0.1);
}

.btn.pink:hover {
  background: rgba(255, 77, 136, 0.25);
}

.hint {
  font-size: 12px;
  color: var(--dim);
  letter-spacing: 1px;
}

form.score-entry {
  display: none;
  flex-direction: row;
  gap: 8px;
  align-items: center;
}

form.score-entry input {
  font-family: monospace;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--pink);
  border-radius: 4px;
  padding: 6px 10px;
  width: 90px;
  text-align: center;
}

.score-list {
  list-style: none;
  margin-top: 4px;
}

.score-list li {
  padding: 4px 12px;
  font-size: 13px;
  color: var(--dim);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  min-width: 220px;
}

.score-list li span:first-child {
  color: var(--text);
}

.score-list li span:last-child {
  color: var(--gold);
}

.back-link {
  color: var(--dim);
  text-decoration: none;
  font-size: 12px;
}

.back-link:hover {
  color: var(--cyan);
}