/* ============================================================
   BASKETBALL ARENA - ARCADE
   Modern arcade-style UI for the Three.js basketball game
   ============================================================ */

/* Screen-reader-only utility (keeps text out of visual layout) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  /* Color */
  --c-orange: #ff7a18;
  --c-orange-2: #ff4d00;
  --c-cyan: #00e5ff;
  --c-gold: #ffd700;
  --c-fire: #ff3d00;
  --c-text: #ffffff;
  --c-dim: #aab3c4;
  --c-bg: #0a0d16;
  --c-panel: rgba(14, 18, 30, 0.78);
  --c-panel-line: rgba(255, 255, 255, 0.12);
  --c-track: rgba(255, 255, 255, 0.14);
  --grad-main: linear-gradient(135deg, #ff7a18 0%, #ff2d55 100%);
  --grad-cyan: linear-gradient(135deg, #00e5ff 0%, #0077ff 100%);

  /* Spacing scale (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;

  /* Radius */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  /* Elevation */
  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 30px 80px rgba(0, 0, 0, 0.6);

  /* Typography scale */
  --fs-xs: 11px;
  --fs-sm: 12px;
  --fs-md: 14px;
  --fs-lg: 16px;
  --fs-xl: 24px;
  --fs-2xl: 34px;
  --fs-3xl: 44px;
  --fs-hero: 52px;

  /* Z-index */
  --z-hud: 50;
  --z-fx: 60;
  --z-float: 80;
  --z-msg: 90;
  --z-overlay: 100;

  /* Motion */
  --ease-pop: cubic-bezier(0.2, 0.8, 0.3, 1.2);
  --ease-out: cubic-bezier(0.2, 0.7, 0.3, 1);

  --font-ui: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--c-bg);
  font-family: var(--font-ui);
  color: var(--c-text);
  user-select: none;
  -webkit-user-select: none;
  overscroll-behavior: none;
}

canvas {
  display: block;
  touch-action: none;
}

.hidden {
  display: none !important;
}

/* Shared interactive states */
:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   FX LAYER (flash, vignette, pulse glow)
   ============================================================ */
#fx-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-fx);
  overflow: hidden;
}

#flash {
  position: absolute;
  inset: 0;
  background: #ffffff;
  opacity: 0;
  transition: opacity 0.18s ease-out;
}

#flash.active {
  opacity: 0.55;
}

#vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, 0.55) 100%);
}

#pulse-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255, 122, 24, 0.55) 0%, transparent 65%);
  opacity: 0;
  transform: scale(0.6);
}

#pulse-glow.pulse {
  animation: pulse-glow 0.45s ease-out;
}

@keyframes pulse-glow {
  0%   { opacity: 0;   transform: scale(0.5); }
  40%  { opacity: 1; }
  100% { opacity: 0;   transform: scale(1.4); }
}

/* ============================================================
   HUD
   ============================================================ */
#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-hud);
}

#hud-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 18px;
}

#mode-label {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--c-cyan);
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--c-panel-line);
  padding: 7px var(--space-3);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(6px);
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.7);
  white-space: nowrap;
}

#score-wrap {
  text-align: center;
  background: var(--c-panel);
  border: 1px solid var(--c-panel-line);
  border-radius: 18px;
  padding: 10px var(--space-7);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

#scoreboard {
  font-size: var(--fs-hero);
  font-weight: 900;
  line-height: 1;
  background: var(--grad-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 10px rgba(255, 77, 0, 0.45));
  font-variant-numeric: tabular-nums;
  transition: transform 0.12s ease-out;
}

#scoreboard.bump {
  animation: score-bump 0.3s ease-out;
}

@keyframes score-bump {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.28); }
  100% { transform: scale(1); }
}

#score-label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--c-dim);
  margin-top: var(--space-1);
}

#timer-wrap {
  text-align: right;
  background: var(--c-panel);
  border: 1px solid var(--c-panel-line);
  border-radius: 18px;
  padding: 10px 18px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  min-width: 132px;
}

#timer-text {
  font-size: var(--fs-2xl);
  font-weight: 900;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--c-text);
  text-shadow: 0 0 16px rgba(0, 229, 255, 0.4);
}

#timer-wrap.low #timer-text {
  color: #ff5252;
  animation: timer-blink 0.6s infinite;
}

@keyframes timer-blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.35; }
}

#timer-bar {
  width: 100%;
  height: 5px;
  background: var(--c-track);
  border-radius: var(--radius-pill);
  margin-top: var(--space-2);
  overflow: hidden;
}

#timer-fill {
  height: 100%;
  width: 100%;
  transform-origin: left;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, #00e5ff, #00ff88);
  transition: transform 0.15s linear, background 0.3s;
  will-change: transform;
}

#timer-wrap.low #timer-fill {
  background: linear-gradient(90deg, #ff5252, #ff3d00);
}

/* Combo meter */
#combo-wrap {
  position: absolute;
  top: 132px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  width: 300px;
  max-width: 70vw;
  pointer-events: none;
}

#combo-label {
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--c-dim);
}

#combo-value {
  font-size: var(--fs-3xl);
  font-weight: 900;
  line-height: 1;
  color: var(--c-text);
  text-shadow: 0 0 18px rgba(255, 122, 24, 0.6);
  font-variant-numeric: tabular-nums;
  transition: color 0.2s;
}

#combo-wrap.fire #combo-value {
  color: var(--c-fire);
  animation: combo-fire 0.5s infinite alternate;
  text-shadow: 0 0 24px rgba(255, 61, 0, 0.9), 0 0 8px rgba(255, 122, 24, 0.9);
}

@keyframes combo-fire {
  from { transform: scale(1); }
  to   { transform: scale(1.12); }
}

#combo-bar {
  height: 6px;
  width: 100%;
  background: var(--c-track);
  border-radius: var(--radius-pill);
  margin-top: var(--space-2);
  overflow: hidden;
}

#combo-fill {
  height: 100%;
  width: 100%;
  transform-origin: left;
  background: var(--grad-main);
  border-radius: var(--radius-pill);
  transition: transform 0.3s ease;
}

#combo-wrap.fire #combo-fill {
  background: linear-gradient(90deg, #ff3d00, #ffd700);
  box-shadow: 0 0 12px rgba(255, 61, 0, 0.8);
}

/* Fire mode indicator */
#fire-indicator {
  position: absolute;
  top: 236px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  background: linear-gradient(180deg, rgba(255, 61, 0, 0.85), rgba(255, 122, 24, 0.7));
  border: 1px solid rgba(255, 215, 0, 0.6);
  border-radius: var(--radius-md);
  padding: var(--space-2) 26px;
  box-shadow: 0 0 30px rgba(255, 61, 0, 0.7);
  animation: fire-indicator 0.7s ease-out;
  backdrop-filter: blur(6px);
}

@keyframes fire-indicator {
  0%   { transform: translateX(-50%) scale(2.2); opacity: 0; }
  60%  { transform: translateX(-50%) scale(0.94); opacity: 1; }
  100% { transform: translateX(-50%) scale(1);   opacity: 1; }
}

.fire-name {
  font-size: var(--fs-xl);
  font-weight: 900;
  letter-spacing: 4px;
  color: #fff;
  text-shadow: 0 0 14px rgba(255, 215, 0, 0.9);
}

.fire-sub {
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: 2px;
  color: #ffe9a8;
  margin-top: var(--space-1);
}

/* Mini stats */
#stats-mini {
  position: absolute;
  left: 18px;
  bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--c-dim);
  background: var(--c-panel);
  border: 1px solid var(--c-panel-line);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  backdrop-filter: blur(8px);
  line-height: 1.6;
}

#stats-mini b {
  color: var(--c-text);
  font-variant-numeric: tabular-nums;
}

/* Challenge box */
#challenge-box {
  position: absolute;
  top: 132px;
  right: 18px;
  width: 240px;
  background: var(--c-panel);
  border: 1px solid var(--c-panel-line);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  backdrop-filter: blur(8px);
  text-align: left;
}

#challenge-title {
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--c-gold);
}

#challenge-text {
  font-size: var(--fs-md);
  font-weight: 700;
  margin: 6px 0 var(--space-2);
  line-height: 1.35;
  color: var(--c-text);
}

#challenge-progress {
  height: 5px;
  background: var(--c-track);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

#challenge-progress-fill {
  height: 100%;
  width: 100%;
  transform-origin: left;
  background: var(--grad-cyan);
  border-radius: var(--radius-pill);
  transition: transform 0.3s ease;
}

/* Power meter */
#power-wrap {
  position: absolute;
  left: 50%;
  bottom: 70px;
  transform: translateX(-50%);
  width: 220px;
  text-align: center;
  pointer-events: none;
}

#power-label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--c-dim);
  margin-bottom: var(--space-2);
}

#power-bar {
  height: 10px;
  background: rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-pill);
  overflow: hidden;
  border: 1px solid var(--c-panel-line);
}

#power-fill {
  height: 100%;
  width: 100%;
  transform-origin: left;
  background: linear-gradient(90deg, #00e5ff, #ffd700, #ff3d00);
  border-radius: var(--radius-pill);
  transition: transform 0.04s linear;
}

/* HUD buttons */
#hud-buttons {
  position: absolute;
  bottom: 18px;
  right: 18px;
  display: flex;
  gap: var(--space-2);
  pointer-events: auto;
}

.hud-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-panel-line);
  background: var(--c-panel);
  color: var(--c-text);
  font-size: var(--fs-md);
  font-weight: 800;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: transform 0.1s, background 0.2s, border-color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hud-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  transform: scale(1.08);
}

.hud-btn:active {
  transform: scale(0.92);
}

/* ============================================================
   FLOATING TEXTS + PRAISE MESSAGE
   ============================================================ */
#float-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-float);
  overflow: hidden;
}

.float-text {
  position: absolute;
  transform: translate(-50%, -50%);
  font-weight: 900;
  text-align: center;
  white-space: nowrap;
  animation: float-up 1.1s var(--ease-out) forwards;
  text-shadow: 0 0 12px currentColor, 0 3px 0 rgba(0, 0, 0, 0.4);
  will-change: transform, opacity;
}

.float-text .ft-main {
  font-size: var(--fs-2xl);
  display: block;
  line-height: 1.1;
}

.float-text .ft-sub {
  font-size: var(--fs-md);
  display: block;
  letter-spacing: 2px;
  margin-top: var(--space-1);
  opacity: 0.9;
}

.float-text.big .ft-main { font-size: var(--fs-hero); }
.float-text.gold   { color: var(--c-gold); }
.float-text.orange { color: var(--c-orange); }
.float-text.cyan   { color: var(--c-cyan); }
.float-text.fire   { color: var(--c-fire); }
.float-text.white  { color: #ffffff; }

@keyframes float-up {
  0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.3); }
  15%  { opacity: 1; transform: translate(-50%, -50%) scale(1.25); }
  30%  { transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -160%) scale(1); }
}

#score-msg {
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.5);
  font-size: 64px;
  font-weight: 900;
  color: var(--c-gold);
  text-shadow: 0 0 20px var(--c-orange), 0 0 40px rgba(255, 61, 0, 0.7), 4px 4px 0 #000;
  opacity: 0;
  pointer-events: none;
  transition: all 0.18s ease-out;
  text-transform: uppercase;
  white-space: nowrap;
  z-index: var(--z-msg);
  letter-spacing: 4px;
}

#score-msg.pop-up {
  transform: translate(-50%, -50%) scale(1.15);
  opacity: 1;
}

/* ============================================================
   OVERLAYS (menu, settings, pause, game over, countdown)
   ============================================================ */
.overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at center, rgba(12, 16, 28, 0.82) 0%, rgba(6, 8, 14, 0.96) 100%);
  backdrop-filter: blur(8px);
  overflow: auto;
  padding: var(--space-5);
}

.panel {
  background: var(--c-panel);
  border: 1px solid var(--c-panel-line);
  border-radius: var(--radius-lg);
  padding: var(--space-7) var(--space-8);
  max-width: 640px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(14px);
  animation: panel-in 0.35s var(--ease-pop);
  max-height: 92vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

@keyframes panel-in {
  0%   { transform: translateY(40px) scale(0.9); opacity: 0; }
  100% { transform: translateY(0) scale(1);      opacity: 1; }
}

.game-title {
  margin: 0;
  font-size: 42px;
  font-weight: 900;
  letter-spacing: 2px;
  line-height: 1.1;
  margin-bottom: var(--space-1);
}

.game-title .t1 { color: var(--c-orange); text-shadow: 0 0 24px rgba(255, 122, 24, 0.7); }
.game-title .t2 { color: var(--c-cyan);   text-shadow: 0 0 24px rgba(0, 229, 255, 0.7); }

/* Title size modifiers */
.title-sm { font-size: 28px; }
.title-md { font-size: 32px; }
.title-ml { font-size: 30px; }
.title-lg { font-size: 42px; }

.game-subtitle {
  margin: 0;
  color: var(--c-dim);
  font-size: var(--fs-md);
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 26px;
}

/* Mode grid */
.mode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: 18px;
}

.mode-btn {
  text-align: left;
  padding: var(--space-4) 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-panel-line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--c-text);
  cursor: pointer;
  transition: transform 0.12s, border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.mode-btn:hover {
  transform: translateY(-3px) scale(1.02);
  border-color: var(--c-orange);
  background: rgba(255, 122, 24, 0.12);
  box-shadow: 0 10px 30px rgba(255, 122, 24, 0.25);
}

.mode-btn:active { transform: scale(0.97); }

.mode-btn .mb-name {
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--c-orange);
}

.mode-btn .mb-desc {
  font-size: var(--fs-sm);
  color: var(--c-dim);
  margin-top: var(--space-1);
  line-height: 1.4;
}

.mode-btn.hot .mb-name { color: var(--c-gold); }

/* Generic buttons */
.btn {
  display: inline-block;
  border: none;
  cursor: pointer;
  font-family: var(--font-ui);
  font-weight: 900;
  letter-spacing: 2px;
  font-size: var(--fs-lg);
  padding: 15px 34px;
  border-radius: var(--radius-pill);
  color: #fff;
  background: var(--grad-main);
  box-shadow: 0 8px 24px rgba(255, 45, 85, 0.4);
  min-height: 50px;
  transition: transform 0.12s, box-shadow 0.2s, filter 0.2s, opacity 0.2s;
}

.btn:hover { transform: translateY(-2px) scale(1.03); box-shadow: 0 12px 32px rgba(255, 45, 85, 0.55); filter: brightness(1.08); }
.btn:active { transform: scale(0.96); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-sm);
  min-height: 36px;
}

.btn.cyan {
  background: var(--grad-cyan);
  box-shadow: 0 8px 24px rgba(0, 119, 255, 0.4);
}
.btn.cyan:hover { box-shadow: 0 12px 32px rgba(0, 119, 255, 0.55); }

.btn.ghost {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--c-panel-line);
  box-shadow: none;
}
.btn.ghost:hover { background: rgba(255, 255, 255, 0.16); box-shadow: none; }

.btn-row {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  margin-top: var(--space-5);
  flex-wrap: wrap;
}

/* Menu best score */
.menu-best {
  margin-top: var(--space-4);
  color: var(--c-dim);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
}

/* Menu site links */
.menu-site-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  align-items: center;
  margin-top: var(--space-3);
  font-size: 12px;
  letter-spacing: 0.5px;
}

.menu-site-links a {
  color: var(--c-dim);
  text-decoration: none;
  transition: color 0.15s ease;
}

.menu-site-links a:hover,
.menu-site-links a:focus-visible {
  color: var(--c-orange);
}

.menu-site-links .sep {
  color: var(--c-dim);
  opacity: 0.6;
}

/* Settings body */
.settings-body {
  text-align: left;
  margin-top: var(--space-4);
}

/* How to play */
.howto-body {
  text-align: left;
  margin-top: var(--space-4);
  max-height: 60vh;
  overflow-y: auto;
}

.howto-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: howto;
}

.howto-steps li {
  position: relative;
  padding: 0 0 14px 44px;
  font-size: var(--fs-sm);
  line-height: 1.65;
  color: var(--c-text);
  counter-increment: howto;
}

.howto-steps li::before {
  content: counter(howto);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-orange);
  color: #0a0d16;
  font-weight: 800;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.howto-steps strong {
  color: var(--c-orange);
}

.howto-tip {
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--c-dim);
  border-left: 3px solid var(--c-orange);
  padding-left: 12px;
}

/* Leaderboard */
.leaderboard {
  margin-top: 18px;
  text-align: left;
  border: 1px solid var(--c-panel-line);
  border-radius: var(--radius-md);
  padding: var(--space-3) 18px;
  background: rgba(0, 0, 0, 0.25);
}

.leaderboard + .leaderboard,
#menu-leaderboard-body .leaderboard {
  margin-top: var(--space-3);
}

.leaderboard h3 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--c-gold);
  text-align: center;
}

.lb-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--fs-md);
  font-weight: 700;
}

.lb-row:nth-child(odd) { background: rgba(255, 255, 255, 0.04); }
.lb-row.first { background: rgba(255, 215, 0, 0.14); color: var(--c-gold); }
.lb-row .lb-rank { width: 26px; font-weight: 900; color: var(--c-dim); }
.lb-row.first .lb-rank { color: var(--c-gold); }
.lb-row .lb-score { font-weight: 900; font-variant-numeric: tabular-nums; }
.lb-row .lb-meta { color: var(--c-dim); font-size: var(--fs-sm); margin-left: var(--space-2); }

.lb-empty {
  text-align: center;
  color: var(--c-dim);
  font-size: 13px;
  padding: 10px;
}

/* Settings toggles */
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.setting-row:last-child { border-bottom: none; }

.setting-label { font-size: 15px; font-weight: 700; }
.setting-label small { display: block; color: var(--c-dim); font-weight: 500; font-size: var(--fs-xs); margin-top: var(--space-1); }

/* Ball skin picker */
.skin-block {
  padding: var(--space-3) var(--space-1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  text-align: left;
}

.skin-picker {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-top: var(--space-3);
}

.skin-swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  border-radius: var(--radius-sm);
  border: 2px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
  color: var(--c-text);
  transition: border-color 0.2s, transform 0.12s;
}

.skin-swatch canvas {
  width: 56px;
  height: 56px;
  border-radius: 50%;
}

.skin-swatch .skin-name { font-size: 10px; font-weight: 800; letter-spacing: 1px; }

.skin-swatch:hover {
  border-color: var(--c-orange);
  transform: translateY(-2px);
}

.skin-swatch.selected {
  border-color: var(--c-cyan);
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.4);
}

.skin-swatch:focus-visible { outline: 2px solid var(--c-cyan); outline-offset: 2px; }

@media (max-width: 720px) {
  .skin-picker { grid-template-columns: repeat(3, 1fr); }
}

.toggle {
  position: relative;
  width: 54px;
  height: 30px;
  flex-shrink: 0;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  margin: 0;
}

.toggle .slider {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background 0.2s;
}

.toggle .slider::before {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.toggle input:checked + .slider { background: var(--grad-main); }
.toggle input:checked + .slider::before { transform: translateX(24px); }
.toggle input:focus-visible + .slider {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

/* Game over stats */
#gameover-score {
  font-size: 72px;
  font-weight: 900;
  background: var(--grad-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  filter: drop-shadow(0 6px 16px rgba(255, 45, 85, 0.4));
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(82px, 1fr));
  gap: 10px;
  margin: var(--space-5) 0 6px;
}

.stat-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--c-panel-line);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-2);
}

.stat-card .sv {
  font-size: var(--fs-xl);
  font-weight: 900;
  color: var(--c-text);
  font-variant-numeric: tabular-nums;
}

.stat-card .sl {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--c-dim);
  margin-top: var(--space-1);
}

#gameover-title {
  margin: 0;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: 4px;
  color: var(--c-orange);
  text-shadow: 0 0 20px rgba(255, 122, 24, 0.6);
}

#new-record {
  margin: var(--space-2) auto 0;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--c-gold);
  animation: record-flash 0.8s infinite alternate;
}

@keyframes record-flash {
  from { opacity: 0.5; transform: scale(0.98); }
  to   { opacity: 1;   transform: scale(1.05); }
}

/* Pause score */
.pause-score {
  margin: 10px 0;
  font-size: 18px;
  color: var(--c-dim);
  font-variant-numeric: tabular-nums;
}

/* Countdown overlay */
#overlay-countdown {
  background: radial-gradient(ellipse at center, rgba(12, 16, 28, 0.55) 0%, rgba(6, 8, 14, 0.8) 100%);
  backdrop-filter: none;
  pointer-events: none;
}

#countdown-num {
  font-size: 180px;
  font-weight: 900;
  color: var(--c-orange);
  text-shadow: 0 0 60px rgba(255, 122, 24, 0.9), 0 10px 0 rgba(0, 0, 0, 0.4);
  animation: countdown-pop 1s var(--ease-pop);
}

@keyframes countdown-pop {
  0%   { transform: scale(3); opacity: 0; }
  30%  { transform: scale(1); opacity: 1; }
  100% { transform: scale(0.7); opacity: 0.4; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
/* Tablet / small laptop: stack challenge box below the combo meter */
@media (max-width: 900px) {
  #challenge-box {
    top: 210px;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    width: min(340px, calc(100% - 36px));
  }

  #fire-indicator { top: 300px; }

  .panel { padding: var(--space-6) var(--space-6); }
}

/* Mobile */
@media (max-width: 720px) {
  #hud-top {
    padding: 10px var(--space-3);
    gap: var(--space-2);
  }

  #scoreboard { font-size: 40px; }
  #mode-label { font-size: var(--fs-xs); padding: 6px 10px; letter-spacing: 2px; }
  #timer-text { font-size: 26px; }
  #timer-wrap { padding: 8px var(--space-3); min-width: 110px; }

  #combo-wrap { top: 112px; }
  #combo-value { font-size: var(--fs-2xl); }

  #challenge-box { top: 176px; }
  #fire-indicator { top: 262px; }

  #stats-mini {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-3);
    left: 10px;
    bottom: 10px;
    font-size: var(--fs-xs);
    padding: 10px 12px;
    max-width: 200px;
  }
  #stats-mini span { white-space: nowrap; }

  #hud-buttons {
    bottom: 10px;
    right: 10px;
    gap: 6px;
  }

  .game-title { font-size: 30px; }
  .title-sm { font-size: 26px; }
  .title-md { font-size: 28px; }
  .title-ml { font-size: 26px; }

  .mode-grid { grid-template-columns: 1fr; }
  .panel { padding: var(--space-6) var(--space-5); }
  .stat-grid { grid-template-columns: 1fr 1fr 1fr; }
  #gameover-score { font-size: 56px; }

  .hud-btn { width: 42px; height: 42px; }
}

/* Small phones */
@media (max-width: 420px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
  #score-wrap { padding: 10px var(--space-5); }
}

/* Ultrawide */
@media (min-width: 1600px) {
  .panel { max-width: 720px; }
  #scoreboard { font-size: 60px; }
  #timer-text { font-size: 40px; }
  #stats-mini { font-size: var(--fs-md); }
}

/* ============================================================
   SEO FOOTER
   Indexable on-page content. Visually hidden so it never
   occupies layout space or captures pointer input, but kept in
   the DOM (and accessible to screen readers) for SEO.
   ============================================================ */
#seo-footer {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

#seo-footer .seo-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

#seo-footer h2 {
  font-size: var(--fs-lg);
  letter-spacing: 0.02em;
  color: var(--c-text);
  margin: 0 0 10px;
}

#seo-footer p {
  font-size: var(--fs-sm);
  line-height: 1.7;
  margin: 0 0 10px;
}

#seo-footer strong {
  color: var(--c-orange);
}

#seo-footer .seo-bottom {
  max-width: 1080px;
  margin: 28px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--c-panel-line);
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--c-dim);
}

/* Ad slots (present in DOM for AdSense; the fullscreen game overlays them) */
.ad-slot {
  position: relative;
  z-index: 1;
  min-height: 50px;
  text-align: center;
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  #score-msg,
  .float-text {
    animation: none;
    transition: none;
  }
}