:root {
  --bg: #05060a;
  --grid-line: rgba(60, 120, 160, 0.09);
  --p1: #00e5ff;
  --p1-dim: #0891a3;
  --p2: #ff9d00;
  --p2-dim: #a86700;
  --ink: #cfeffb;
}

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

html { height: 100%; }

/* Body fills the whole viewport and centers the stage. It must NOT shrink to
   the stage, or its overflow:hidden would clip the scaled-up stage on big
   screens. (Keeping html as a flex parent made body shrink-to-fit — the bug.) */
body {
  width: 100%;
  height: 100%;
  background: #000;
  color: var(--ink);
  font-family: "Courier New", ui-monospace, monospace;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  user-select: none;
}

#stage {
  position: relative;
  width: 960px;
  height: 720px;
  flex: 0 0 auto;              /* keep the layout box fixed; JS scales it */
  transform-origin: center center;
  will-change: transform;
  background: var(--bg);
  box-shadow: 0 0 60px rgba(0, 180, 220, 0.15), inset 0 0 120px rgba(0,0,0,0.9);
  overflow: hidden;
}

/* Fullscreen toggle — fixed to the viewport so it isn't affected by the scale */
.fs-btn {
  position: fixed;
  top: 14px; right: 14px;
  z-index: 100;
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  color: var(--ink);
  background: rgba(3, 6, 12, 0.55);
  border: 1px solid rgba(160, 200, 220, 0.3);
  border-radius: 6px;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.15s, color 0.15s, border-color 0.15s;
}
.fs-btn:hover { opacity: 1; color: var(--p1); border-color: var(--p1); }

#game {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* Subtle CRT scanline + vignette overlay */
.crt {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(0,0,0,0) 0px,
      rgba(0,0,0,0) 2px,
      rgba(0,0,0,0.18) 3px,
      rgba(0,0,0,0) 4px
    ),
    radial-gradient(ellipse at center, rgba(0,0,0,0) 55%, rgba(0,0,0,0.55) 100%);
}

.overlay {
  position: absolute;
  inset: 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hidden { display: none !important; }

/* Splash / title screen */
#splash {
  z-index: 45;
  cursor: pointer;
  background: #000;
}
.splash-img {
  width: 100%;
  height: 100%;
  object-fit: contain;   /* show the whole artwork; dark edges blend into black */
  display: block;
}
.press-key {
  position: absolute;
  bottom: 6%;
  left: 0; right: 0;
  text-align: center;
  font-size: 22px;
  letter-spacing: 7px;
  font-weight: 700;
  color: #eaffff;
  text-shadow: 0 0 12px var(--p1), 0 0 30px var(--p1);
  animation: press-blink 1.1s steps(1, end) infinite;
}
@keyframes press-blink { 0%, 55% { opacity: 1; } 55.01%, 100% { opacity: 0; } }

/* Studio logo, lower-right. A faint dark scrim separates it from the art; the
   box is isolated so the logo's screen blend (which drops its black background)
   plays against the scrim, keeping the logo crisp. */
.splash-credit {
  position: absolute;
  right: 12%;                /* clears the ~11.2% pillarbox bar → sits inside the artwork */
  bottom: 2.5%;
  box-sizing: content-box;   /* width applies to the logo */
  width: 15%;
  pointer-events: none;
}
.splash-logo {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.95;
}

/* ---------- Menu / panels ---------- */
.panel {
  background: rgba(3, 6, 12, 0.82);
  backdrop-filter: blur(2px);
  gap: 22px;
}

.title {
  font-size: 92px;
  letter-spacing: 14px;
  font-weight: 900;
  color: #fff;
  text-shadow:
    0 0 10px var(--p1),
    0 0 30px var(--p1),
    0 0 60px var(--p1);
  animation: flicker 4s infinite;
}

@keyframes flicker {
  0%, 92%, 100% { opacity: 1; }
  93% { opacity: 0.55; }
  94% { opacity: 1; }
  96% { opacity: 0.7; }
}

.tagline {
  font-size: 16px;
  letter-spacing: 3px;
  color: #7fb4c8;
  margin-top: -8px;
}

.legend {
  display: flex;
  gap: 60px;
  margin: 8px 0;
}

.ctl { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.ctl .who { font-size: 13px; letter-spacing: 3px; }
.ctl.p1 .who { color: var(--p1); text-shadow: 0 0 8px var(--p1); }
.ctl.p2 .who { color: var(--p2); text-shadow: 0 0 8px var(--p2); }
.keys { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.keys .row { display: flex; gap: 6px; }
.key {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(160, 200, 220, 0.4);
  border-radius: 5px;
  font-size: 15px;
  color: var(--ink);
  background: rgba(255,255,255,0.03);
}
.ctl.p1 .key { border-color: var(--p1-dim); }
.ctl.p2 .key { border-color: var(--p2-dim); }
.key.wide { width: auto; padding: 0 10px; font-size: 12px; letter-spacing: 1px; }
.boost-key { margin-top: 4px; font-size: 11px; letter-spacing: 2px; color: #7fb4c8; display: flex; align-items: center; gap: 8px; }

/* Mode segmented control */
.seg { gap: 0; border: 1px solid rgba(160,200,220,0.25); border-radius: 6px; overflow: hidden; }
.seg-btn {
  font-family: inherit;
  font-size: 13px;
  letter-spacing: 3px;
  padding: 10px 22px;
  background: transparent;
  color: #6f96a6;
  border: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.seg-btn.active { background: var(--p1); color: #001015; font-weight: 700; }
.seg-btn:not(.active):hover { color: var(--ink); background: rgba(0,229,255,0.08); }

.opt {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 15px;
  letter-spacing: 3px;
}
.target-btn {
  width: 32px; height: 32px;
  background: transparent;
  border: 1px solid var(--p1-dim);
  color: var(--p1);
  font-size: 20px;
  cursor: pointer;
  border-radius: 5px;
}
.target-btn:hover { background: rgba(0, 229, 255, 0.12); }
.target-val { min-width: 30px; font-size: 24px; color: #fff; }

.toggle { cursor: pointer; }
.toggle input { width: 16px; height: 16px; accent-color: var(--p2); cursor: pointer; }

.big-btn {
  margin-top: 6px;
  padding: 14px 54px;
  font-family: inherit;
  font-size: 24px;
  letter-spacing: 8px;
  color: #001015;
  background: var(--p1);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 700;
  box-shadow: 0 0 24px var(--p1);
  transition: transform 0.08s, box-shadow 0.2s;
}
.big-btn:hover { transform: scale(1.05); box-shadow: 0 0 40px var(--p1); }
.big-btn:active { transform: scale(0.98); }

/* ---------- HUD ---------- */
#hud {
  z-index: 30;
  flex-direction: row;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px 34px;
  pointer-events: none;
}
.pside { display: flex; flex-direction: column; gap: 8px; }
.pside.right { align-items: flex-end; }
.score { display: flex; align-items: baseline; gap: 12px; font-size: 44px; font-weight: 900; }
.score .label { font-size: 15px; letter-spacing: 2px; }
.score.p1 { color: var(--p1); text-shadow: 0 0 14px var(--p1); }
.score.p2 { color: var(--p2); text-shadow: 0 0 14px var(--p2); }
.round-info { font-size: 15px; letter-spacing: 4px; color: #6f96a6; margin-top: 14px; }

/* Boost charge pips (3 per round) */
.boost-pips { display: flex; gap: 5px; }
.boost-pips span {
  width: 28px; height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.10);
  transition: background 0.1s;
}
.boost-pips.p1 span.filled { background: var(--p1-dim); }
.boost-pips.p2 span.filled { background: var(--p2-dim); }
.boost-pips.p1 span.active { background: var(--p1); box-shadow: 0 0 10px var(--p1); animation: pip-pulse 0.5s infinite alternate; }
.boost-pips.p2 span.active { background: var(--p2); box-shadow: 0 0 10px var(--p2); animation: pip-pulse 0.5s infinite alternate; }
@keyframes pip-pulse { from { opacity: 1; } to { opacity: 0.35; } }

/* Pause menu */
.pause-title {
  font-size: 64px;
  font-weight: 900;
  letter-spacing: 12px;
  color: #fff;
  text-shadow: 0 0 22px var(--p1);
  margin-bottom: 8px;
}
.menu-btn {
  font-family: inherit;
  font-size: 18px;
  letter-spacing: 4px;
  padding: 12px 44px;
  min-width: 220px;
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(160, 200, 220, 0.4);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
.menu-btn:hover { background: rgba(0, 229, 255, 0.10); border-color: var(--p1); }

/* Volume sliders (menu + pause menu) */
.audio-settings {
  display: flex;
  gap: 26px;
  margin-top: 6px;
}
.vol {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 2px;
  color: #7fb4c8;
}
.vol input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 4px;
  border-radius: 2px;
  background: rgba(160, 200, 220, 0.25);
  cursor: pointer;
}
.vol input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--p1);
  box-shadow: 0 0 8px var(--p1);
}
.vol input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  border: none;
  border-radius: 50%;
  background: var(--p1);
  box-shadow: 0 0 8px var(--p1);
}

/* ---------- Banner ---------- */
.banner-title {
  font-size: 56px;
  font-weight: 900;
  letter-spacing: 6px;
  color: #fff;
}
.banner-sub { font-size: 18px; letter-spacing: 4px; color: #7fb4c8; margin-top: 12px; }

/* ---------- Countdown ---------- */
#countdown {
  z-index: 35;
  font-size: 180px;
  font-weight: 900;
  color: #fff;
  pointer-events: none;
}
#countdown span {
  text-shadow: 0 0 30px var(--p1), 0 0 80px var(--p1);
  animation: pop 1s ease-out;
}
@keyframes pop {
  0% { transform: scale(2.2); opacity: 0; }
  30% { transform: scale(1); opacity: 1; }
  100% { transform: scale(0.85); opacity: 0.6; }
}

/* Respect the OS "reduce motion" preference (screen shake is disabled in JS) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}