/* ---------------------------------------------------------------------------
   style.css
--------------------------------------------------------------------------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  overflow: hidden;
  background: #04060d;
  overscroll-behavior: none;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* Designed backdrop behind the letterboxed field — replaces dead black gutters.
   Deep nebula glow tuned to the game palette (cold blue core, faint violet edge). */
#stage {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(120% 90% at 50% 0%, #12224a 0%, rgba(18, 34, 74, 0) 55%),
    radial-gradient(90% 70% at 50% 110%, #1a0f33 0%, rgba(26, 15, 51, 0) 60%),
    radial-gradient(60% 45% at 18% 55%, rgba(47, 111, 216, 0.16) 0%, rgba(47, 111, 216, 0) 70%),
    radial-gradient(60% 45% at 82% 45%, rgba(122, 92, 255, 0.12) 0%, rgba(122, 92, 255, 0) 70%),
    linear-gradient(180deg, #070b18 0%, #04060d 100%);
  padding:
    max(0px, env(safe-area-inset-top)) max(0px, env(safe-area-inset-right))
    max(0px, env(safe-area-inset-bottom)) max(0px, env(safe-area-inset-left));
}

#game {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  font-family: ui-rounded, "SF Pro Rounded", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: #dceaff;
}

#hud-top {
  position: absolute;
  top: max(10px, env(safe-area-inset-top));
  left: max(12px, env(safe-area-inset-left));
  right: max(12px, env(safe-area-inset-right));
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  max-width: 100%;
}

.hud-block { pointer-events: none; }
.hud-label { font-size: 11px; letter-spacing: 2px; opacity: 0.65; font-weight: 700; }
#score {
  font-size: 30px; font-weight: 800; line-height: 1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 18px rgba(125, 214, 255, 0.45);
  transition: transform 0.08s ease;
}
#score.pop { transform: scale(1.18); }
#best { font-size: 10px; letter-spacing: 1.5px; opacity: 0.55; margin-top: 3px; font-weight: 700; }

#hud-mid {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding-top: 3px;
  min-width: 0;
  flex: 1 1 auto;
}
/* Level title: single line, never collides with the score digits */
.hud-level {
  font-size: 12px; font-weight: 800; letter-spacing: 2.5px; opacity: 0.92;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 100%;
}

/* ---- OVERDRIVE / CHARGE meter: clearly visible, labelled, always readable ---- */
.od-meter-wrap {
  width: 168px; max-width: 100%;
  display: flex; flex-direction: column; gap: 3px;
}
.od-meter-head {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 9px; font-weight: 800; letter-spacing: 2px;
}
.od-label {
  color: rgba(220, 234, 255, 0.78);
  text-shadow: 0 0 8px rgba(125, 214, 255, 0.35);
  transition: color 0.35s;
}
.od-val { color: rgba(125, 214, 255, 0.75); font-variant-numeric: tabular-nums; transition: color 0.35s; }
.od-meter {
  position: relative;
  width: 100%; height: 9px;
  border-radius: 5px;
  background: rgba(8, 12, 26, 0.72);
  border: 1px solid rgba(125, 214, 255, 0.38);
  box-shadow:
    inset 0 1px 3px rgba(0, 0, 0, 0.6),
    0 0 12px rgba(47, 111, 216, 0.22);
  overflow: hidden;
}
.od-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, #1f6dff, #7dd6ff 70%, #bfefff);
  border-radius: 4px;
  box-shadow: 0 0 9px rgba(125, 214, 255, 0.75);
  transition: width 0.15s linear, background 0.4s;
}
.od-fill.hot {
  background: linear-gradient(90deg, #ff9a3c, #ffe98a, #ffffff);
  box-shadow: 0 0 12px rgba(255, 170, 80, 0.9);
}
.od-meter-wrap.hot .od-label { color: #ffd9a0; text-shadow: 0 0 10px rgba(255, 170, 80, 0.7); }
.od-meter-wrap.hot .od-val { color: #ffd98a; }
.od-meter-wrap.hot .od-meter { border-color: rgba(255, 170, 90, 0.55); }

/* lives: ONE unified design on every platform — small label + 3-slot dot rail */
#lives {
  display: inline-flex; gap: 5px; align-items: center; justify-content: center;
  font-size: 13px; line-height: 1;
}
#lives .lives-label {
  font-size: 9px; font-weight: 800; letter-spacing: 2px; color: #8aa4d4;
  margin-right: 3px; opacity: 0.85;
}
#lives .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: #7dd6ff; box-shadow: 0 0 9px rgba(125, 214, 255, 0.65);
}
#lives .dot.lost { opacity: 0.22; box-shadow: none; }

/* touch control-mode pill: same family as .hud-btn — auto width, always
   rounded (never a square-clipped edge), and vertically matched to the
   sound/pause buttons beside it */
.mode-btn {
  width: auto !important;              /* .hud-btn fixes 42px; override */
  min-width: 62px;
  height: 38px;                        /* matches .hud-btn on desktop */
  border-radius: 999px;
  padding: 0 16px;
  white-space: nowrap;
  flex: 0 0 auto;
  font-weight: 700;
  letter-spacing: 1px;
}

.hud-right { display: flex; gap: 8px; pointer-events: auto; }
.hud-btn {
  pointer-events: auto;
  background: rgba(16, 24, 48, 0.62);
  border: 1px solid rgba(125, 214, 255, 0.24);
  color: #dceaff;
  width: 42px; height: 38px;
  border-radius: 11px;
  font-size: 16px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: background 0.15s, transform 0.1s, border-color 0.15s;
  font-family: inherit;
}
.hud-btn:hover { border-color: rgba(125, 214, 255, 0.55); background: rgba(23, 34, 66, 0.72); }
.hud-btn:active { transform: scale(0.92); background: rgba(255,255,255,0.16); }

/* overdrive banner */
#od-banner {
  position: absolute;
  top: 13%;
  left: 50%;
  transform: translateX(-50%);
  padding: 9px 26px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(255,110,40,0.16), rgba(255,220,120,0.14), rgba(255,110,40,0.16));
  border: 1px solid rgba(255, 170, 90, 0.5);
  box-shadow: 0 0 26px rgba(255,140,60,0.35), inset 0 0 14px rgba(255,160,80,0.15);
  animation: odPulse 0.7s ease-in-out infinite alternate;
  backdrop-filter: blur(4px);
}
#od-text {
  font-size: 21px; font-weight: 900; letter-spacing: 3px;
  background: linear-gradient(90deg, #ffd9a0, #ffffff, #ffb35c);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  white-space: nowrap;
}
@keyframes odPulse { from { transform: translateX(-50%) scale(1); } to { transform: translateX(-50%) scale(1.06); } }

#combo-tag {
  position: absolute;
  top: 21%;
  left: 50%;
  transform: translateX(-50%);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 2px;
  color: #ffd98a;
  text-shadow: 0 0 14px rgba(255,190,90,0.7);
}

/* ---- desktop side panels (fill the wide letterbox gutters) ---------------- */
/* Panels are anchored TO the playfield edges (each gutter is exactly the field's
   leftover width), so panel + field tile the full window with no dead seams.
   The field's own background gradient runs wall-to-wall behind them. */
.side-panel {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 236px;
  display: none;                 /* shown by JS on wide viewports */
  flex-direction: column;
  gap: 26px;
  padding: 24px 26px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(18, 30, 62, 0.4), rgba(10, 16, 36, 0.4));
  border: 1px solid rgba(125, 214, 255, 0.14);
  box-shadow: 0 0 44px rgba(20, 50, 120, 0.25) inset, 0 0 0 1px rgba(0,0,0,0.25);
  pointer-events: none;
  font-family: ui-rounded, "SF Pro Rounded", system-ui, sans-serif;
  color: #dceaff;
}
#panel-left { right: calc(50% + var(--field-half, 360px)); }
#panel-right { left: calc(50% + var(--field-half, 360px)); }
.side-panel.on { display: flex; }

.sp-title {
  font-size: 10px; font-weight: 800; letter-spacing: 3px; color: #7dd6ff;
  border-bottom: 1px solid rgba(125, 214, 255, 0.18);
  padding-bottom: 8px;
  text-shadow: 0 0 10px rgba(125, 214, 255, 0.3);
}
.sp-row { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.sp-k { font-size: 10px; font-weight: 700; letter-spacing: 2px; color: #8aa4d4; white-space: nowrap; }
.sp-v { font-size: 17px; font-weight: 800; font-variant-numeric: tabular-nums; color: #eaf4ff; }
.sp-hint { font-size: 10px; letter-spacing: 1.5px; color: #6d85b8; margin-top: -12px; line-height: 1.8; }
.sp-hint b { color: #9db8e8; font-weight: 800; }

.legend { display: flex; flex-direction: column; gap: 7px; }
.legend-row { display: flex; align-items: center; gap: 9px; }
.legend-swatch { width: 15px; height: 9px; border-radius: 2px; flex: 0 0 auto; }
.legend-name { font-size: 10px; letter-spacing: 1.5px; color: #8aa4d4; white-space: nowrap; }

@media (max-width: 480px) {
  #hud-top { gap: 6px; left: max(8px, env(safe-area-inset-left)); right: max(8px, env(safe-area-inset-right)); top: max(8px, env(safe-area-inset-top)); }
  #score { font-size: 22px; }
  .hud-label { font-size: 10px; letter-spacing: 1.5px; }
  .hud-level { font-size: 10px; letter-spacing: 2px; }
  .od-meter-wrap { width: 104px; }
  .od-meter { height: 8px; }
  .od-meter-head { font-size: 8px; letter-spacing: 1.5px; }
  .hud-btn { width: 34px; height: 30px; font-size: 13px; border-radius: 10px; padding: 0 !important; }
  .mode-btn { height: 30px; min-width: 0; font-size: 11px; padding: 0 12px !important; }
  #lives { gap: 4px; }
  #lives .dot { width: 7px; height: 7px; }
  #lives .lives-label { font-size: 8px; letter-spacing: 1.5px; }
  #od-banner { padding: 7px 18px; }
  #od-text { font-size: 17px; letter-spacing: 2px; }
  #combo-tag { font-size: 13px; }
}

@media (max-width: 1000px) {
  .side-panel { display: none !important; }
}

.hidden { display: none !important; }