:root {
  --bg: #070312;
  --cyan: #4de0ff;
  --magenta: #ff5d9a;
  --gold: #ffe14d;
  --green: #3dff8f;
  --red: #ff4060;
  --purple: #c060ff;
  --text: #e6ecff;
  --dim: #8a90b8;
}

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

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

#stage {
  position: relative;
  width: min(100vw, calc(100vh * 1.6));
  height: min(100vh, calc(100vw / 1.6));
  overflow: hidden;
}

#game-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: none;
}

#hud.visible { display: block; }

.hud-left, .hud-right {
  position: absolute;
  top: 12px;
  font-size: 14px;
  letter-spacing: 1px;
}

.hud-left { left: 16px; }
.hud-right { right: 16px; text-align: right; }

.hud-score { color: var(--gold); font-size: 18px; font-weight: 700; }
.hud-level { color: var(--cyan); font-size: 13px; margin-top: 2px; }
.hud-gems { color: var(--gold); font-size: 13px; margin-top: 2px; }
.hud-best { color: var(--dim); font-size: 11px; margin-top: 1px; }

.screen {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(7, 3, 18, 0.85);
  text-align: center;
}

#menu { display: flex; }

.screen h1 {
  font-size: 36px;
  font-weight: 900;
  letter-spacing: 6px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.screen h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--cyan);
}

.screen p { color: var(--dim); font-size: 13px; max-width: 360px; line-height: 1.6; }

.btn {
  padding: 10px 32px;
  border: 2px solid var(--cyan);
  background: transparent;
  color: var(--cyan);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.12s ease;
  pointer-events: auto;
}

.btn:hover {
  background: var(--cyan);
  color: var(--bg);
  box-shadow: 0 0 20px rgba(77, 224, 255, 0.4);
}

.btn.pink {
  border-color: var(--magenta);
  color: var(--magenta);
}

.btn.pink:hover {
  background: var(--magenta);
  color: var(--bg);
  box-shadow: 0 0 20px rgba(255, 93, 154, 0.4);
}

.score-list {
  list-style: none;
  max-height: 180px;
  overflow-y: auto;
  width: 260px;
  margin: 6px 0;
}

.score-list li {
  display: flex;
  justify-content: space-between;
  padding: 3px 0;
  font-size: 13px;
  border-bottom: 1px solid rgba(157, 77, 255, 0.15);
}

.score-list .rank { color: var(--dim); width: 24px; }
.score-list .name { color: var(--text); flex: 1; text-align: left; padding-left: 8px; }
.score-list .score { color: var(--gold); font-weight: 700; }

.score-entry { display: none; margin: 4px 0; }
.score-entry.show { display: flex; gap: 8px; align-items: center; }

.score-entry input {
  width: 70px;
  padding: 6px 8px;
  border: 1px solid var(--cyan);
  background: rgba(7, 3, 18, 0.8);
  color: var(--text);
  font-size: 14px;
  font-family: monospace;
  text-align: center;
  letter-spacing: 3px;
  text-transform: uppercase;
  border-radius: 3px;
  pointer-events: auto;
}

.score-entry input::placeholder { color: var(--dim); letter-spacing: 1px; font-size: 11px; }

.score-entry button {
  padding: 6px 16px;
  border: 1px solid var(--cyan);
  background: transparent;
  color: var(--cyan);
  font-size: 12px;
  cursor: pointer;
  border-radius: 3px;
  pointer-events: auto;
}

.score-entry button:hover { background: var(--cyan); color: var(--bg); }

#topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  pointer-events: none;
  z-index: 10;
}

#topbar > * { pointer-events: auto; }

#btn-home {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(77, 224, 255, 0.3);
  border-radius: 4px;
  color: var(--cyan);
  text-decoration: none;
  font-size: 14px;
  background: rgba(7, 3, 18, 0.6);
  transition: all 0.12s;
}

#btn-home:hover { background: var(--cyan); color: var(--bg); }

#mute-btn {
  width: 28px;
  height: 28px;
  border: 1px solid rgba(77, 224, 255, 0.3);
  border-radius: 4px;
  background: rgba(7, 3, 18, 0.6);
  color: var(--cyan);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s;
}

#mute-btn:hover { background: var(--cyan); color: var(--bg); }
#mute-btn.muted { color: var(--dim); border-color: rgba(138, 144, 184, 0.3); }

.back-link {
  margin-top: 12px;
  color: var(--dim);
  font-size: 12px;
  text-decoration: none;
  letter-spacing: 1px;
}

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

.intro-text {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: 4px;
  color: var(--cyan);
  text-shadow: 0 0 30px rgba(77, 224, 255, 0.5);
}

.pause-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--cyan);
  margin-bottom: 8px;
}

#level-name {
  font-size: 16px;
  color: var(--magenta);
  letter-spacing: 2px;
  font-weight: 700;
}