:root {
  --bg:     #060610;
  --grid:   #0d0d2b;
  --neon-g: #00ff88;
  --neon-g2:#00cc6a;
  --neon-f: #ff3c6e;
  --neon-b: #7700ff;
  --panel:  #0a0a1f;
  --border: #1a1a3e;
  --text:   #c0c8ff;
  --dim:    #3a3a6a;
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Share Tech Mono', monospace;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  user-select: none;
  touch-action: none;
}

body::before {
  content: '';
  position: fixed; inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent, transparent 2px,
    rgba(0,0,0,.15) 2px, rgba(0,0,0,.15) 4px
  );
  pointer-events: none;
  z-index: 100;
}

body::after {
  content: '';
  position: fixed; inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: gridMove 8s linear infinite;
  pointer-events: none;
  z-index: 0;
  opacity: .5;
}

@keyframes gridMove {
  from { background-position: 0 0; }
  to   { background-position: 40px 40px; }
}

.wrapper {
  position: relative; z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 12px;
  width: 100%;
}

header { text-align: center; letter-spacing: .2em; }

header h1 {
  font-family: 'Orbitron', monospace;
  font-weight: 900;
  font-size: clamp(1.1rem, 5vw, 2.2rem);
  color: var(--neon-g);
  text-shadow: 0 0 8px var(--neon-g), 0 0 24px var(--neon-g), 0 0 60px rgba(0,255,136,.4);
  animation: pulse 3s ease-in-out infinite;
}

header p {
  font-size: .6rem;
  color: var(--dim);
  letter-spacing: .3em;
  margin-top: 2px;
}

@keyframes pulse {
  0%,100% { text-shadow: 0 0 8px var(--neon-g), 0 0 24px var(--neon-g), 0 0 60px rgba(0,255,136,.4); }
  50%      { text-shadow: 0 0 12px var(--neon-g), 0 0 40px var(--neon-g), 0 0 80px rgba(0,255,136,.6); }
}

.scorebar {
  display: flex;
  gap: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 18px;
}

.score-item { text-align: center; }

.score-label {
  font-size: .5rem;
  letter-spacing: .25em;
  color: var(--dim);
}

.score-value {
  font-family: 'Orbitron', monospace;
  font-size: clamp(.85rem, 3vw, 1.2rem);
  font-weight: 700;
  color: var(--neon-b);
  text-shadow: 0 0 10px var(--neon-b);
}

.score-value.hi {
  color: var(--neon-g);
  text-shadow: 0 0 10px var(--neon-g);
}

.canvas-wrap {
  position: relative;
  width: min(400px, 92vw);
  height: min(400px, 92vw);
  border: 1px solid #009bbf;
  border-radius: 4px;
  box-shadow:
    0 0 0 1px var(--bg),
    0 0 20px rgba(0,207,255,.2),
    0 0 60px rgba(0,207,255,.08),
    inset 0 0 30px rgba(0,0,0,.5);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 3px;
  touch-action: none;
}

.overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 12px;
  background: rgba(6,6,16,.85);
  backdrop-filter: blur(2px);
  border-radius: 3px;
  transition: opacity .3s;
}

.overlay.hidden { opacity: 0; pointer-events: none; }

.ov-title {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.1rem, 5vw, 1.6rem);
  font-weight: 900;
  color: var(--neon-f);
  text-shadow: 0 0 16px var(--neon-f), 0 0 40px rgba(255,60,110,.5);
  letter-spacing: .1em;
}

.ov-title.start {
  color: var(--neon-g);
  text-shadow: 0 0 16px var(--neon-g), 0 0 40px rgba(0,255,136,.5);
}

.ov-sub {
  font-size: .65rem;
  color: var(--dim);
  letter-spacing: .1em;
  text-align: center;
  padding: 0 16px;
  line-height: 1.7;
}

.swipe-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  opacity: .7;
}

.swipe-arrows {
  font-size: 1.1rem;
  color: var(--neon-g);
  text-shadow: 0 0 8px var(--neon-g);
  letter-spacing: .15em;
}

.ov-score {
  font-family: 'Orbitron', monospace;
  font-size: .8rem;
  color: var(--neon-b);
  letter-spacing: .1em;
}

.ov-score.hidden { display: none; }

.btn-play {
  background: transparent;
  border: 1px solid var(--neon-g);
  color: var(--neon-g);
  font-family: 'Orbitron', monospace;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .2em;
  padding: 10px 30px;
  cursor: pointer;
  border-radius: 3px;
  text-shadow: 0 0 8px var(--neon-g);
  box-shadow: 0 0 12px rgba(0,255,136,.2), inset 0 0 12px rgba(0,255,136,.05);
  transition: all .15s;
  margin-top: 4px;
  -webkit-tap-highlight-color: transparent;
}

.btn-play:hover, .btn-play:active {
  background: rgba(0,255,136,.1);
  box-shadow: 0 0 24px rgba(0,255,136,.4), inset 0 0 16px rgba(0,255,136,.1);
}

/* Swipe feedback overlay */
.swipe-feedback {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: 3px;
  opacity: 0;
  transition: opacity .15s;
  z-index: 5;
}
.swipe-feedback.active { opacity: 1; }

/* Pause button — solo móvil */
.pause-bar {
  display: flex;
  justify-content: center;
}

.btn-pause {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--dim);
  font-family: 'Share Tech Mono', monospace;
  font-size: .62rem;
  letter-spacing: .15em;
  padding: 6px 20px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: all .15s;
}

.btn-pause:active {
  background: rgba(0,255,136,.08);
  color: var(--neon-g);
  border-color: var(--neon-g);
}

@media (min-width: 600px) {
  .btn-pause { display: none; }
}

/* Keyboard hint — solo desktop */
.controls {
  display: none;
  gap: 20px;
  font-size: .58rem;
  color: var(--dim);
  letter-spacing: .12em;
}

@media (min-width: 600px) {
  .controls { display: flex; }
}

.key {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  margin-right: 4px;
  color: var(--text);
}

.footer {
  font-size: .55rem;
  letter-spacing: .15em;
  color: var(--dim);
  text-align: center;
}

.footer-name {
  color: var(--neon-g);
  text-shadow: 0 0 8px var(--neon-g);
}