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

:root {
  --cosmic-bg: #0c0820;
  --cosmic-panel: rgba(18, 12, 40, 0.82);
  --cosmic-border: rgba(192, 132, 252, 0.45);
  --cosmic-glow: rgba(129, 140, 248, 0.35);
  --text-bright: #f8f4ff;
  --text-muted: rgba(216, 180, 254, 0.78);
  --btn-grad: linear-gradient(135deg, #c084fc 0%, #818cf8 48%, #67e8f9 100%);
  --btn-shadow: 0 6px 28px rgba(129, 140, 248, 0.45);
  --score-grad: linear-gradient(180deg, #fff 0%, #e9d5ff 55%, #a5b4fc 100%);
}

body {
  overflow: hidden;
  background: var(--cosmic-bg);
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Helvetica Neue", sans-serif;
  color: var(--text-bright);
  touch-action: none;
  user-select: none;
  -webkit-font-smoothing: antialiased;
}

canvas {
  display: block;
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  touch-action: none;
  cursor: pointer;
}

#hud {
  position: fixed;
  top: 0;
  left: 0;
  padding: 20px 0 0 20px;
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.2s;
}

body.playing #hud {
  opacity: 1;
}

#score {
  font-size: clamp(2.8rem, 9vw, 4.2rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  background: var(--score-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 2px 12px rgba(192, 132, 252, 0.55));
}

#best {
  margin-top: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-muted);
  text-shadow: 0 0 18px rgba(129, 140, 248, 0.35);
}

#best-val {
  font-weight: 800;
  color: #e9d5ff;
}

#combo-hud {
  margin-top: 8px;
  min-height: 1.2em;
  font-size: 1.05rem;
  font-weight: 800;
  color: #fde68a;
  text-shadow: 0 0 16px rgba(251, 191, 36, 0.65);
  letter-spacing: 0.02em;
}

#mood-hud {
  margin-top: 10px;
  min-height: 1.2em;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(236, 233, 254, 0.88);
  text-shadow: 0 0 14px rgba(129, 140, 248, 0.34);
}

#perfect-pop {
  position: fixed;
  left: 50%;
  top: 38%;
  z-index: 4;
  transform: translate(-50%, -50%) scale(0.6);
  pointer-events: none;
  font-size: clamp(1.8rem, 7vw, 2.6rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  color: #fff;
  text-shadow:
    0 0 24px rgba(251, 191, 36, 0.9),
    0 2px 0 rgba(192, 132, 252, 0.5);
  opacity: 0;
  transition: opacity 0.12s ease, transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
}

#perfect-pop.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

#perfect-pop.hidden:not(.show) {
  opacity: 0;
}

#overlay {
  position: fixed;
  inset: 0;
  z-index: 5;
  pointer-events: none;
}

#overlay:not(.playing):not(.over) {
  display: grid;
  place-items: center;
  background: radial-gradient(ellipse at 50% 40%, rgba(48, 28, 88, 0.35) 0%, transparent 55%),
    rgba(8, 5, 18, 0.25);
  pointer-events: auto;
}

#overlay.playing {
  pointer-events: none;
}

#overlay.playing.hidden-ui {
  display: none;
}

#overlay.over {
  pointer-events: auto;
  display: grid;
  place-items: center;
  background: rgba(8, 5, 22, 0.72);
  backdrop-filter: blur(10px);
}

.panel-card {
  text-align: center;
  padding: 2rem 2.2rem 1.85rem;
  width: min(92vw, 340px);
  background: var(--cosmic-panel);
  border: 1px solid var(--cosmic-border);
  border-radius: 24px;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.04) inset,
    0 24px 64px rgba(0, 0, 0, 0.45),
    0 0 48px var(--cosmic-glow);
  pointer-events: auto;
  backdrop-filter: blur(14px);
}

.start-panel.hidden,
.go-panel.hidden {
  display: none;
}

.panel-logo {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
  background: linear-gradient(135deg, #f9a8d4, #c084fc, #818cf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.panel-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.45rem;
  line-height: 1.45;
}

.panel-btn {
  border: none;
  border-radius: 999px;
  padding: 0.88rem 2.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  background: var(--btn-grad);
  cursor: pointer;
  box-shadow: var(--btn-shadow);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.panel-btn:active {
  transform: scale(0.97);
  box-shadow: 0 4px 16px rgba(129, 140, 248, 0.35);
}

.go-score {
  font-size: clamp(4rem, 14vw, 5.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  margin-bottom: 0.45rem;
  background: var(--score-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 4px 20px rgba(192, 132, 252, 0.5));
}

.go-best {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 1.6rem;
}

.go-best span {
  font-weight: 800;
  color: #e9d5ff;
}