/* ─────────────────────────────────────────────────────────────
   1. DESIGN TOKENS
   ───────────────────────────────────────────────────────────── */
:root {
  --ui-scale: 1;
  --text-scale: 1;
  --void-bg:        #14040D;
  --panel-surface:  #2A0A1C;
  --primary:        #CD1C18;
  --primary-deep:   #9B1313;
  --accent-violet:  #9400D3;
  --accent-magenta: #ED80E9;
  --text-highlight: #D3D3FF;
  --text-muted:     #D8BFD8;
  --warm-glow:      #FFA896;
  --col-bg: var(--void-bg);
  --col-bg-mid: #1f0714;
  --col-glass: rgba(42, 10, 28, 0.72);
  --col-glass-border: rgba(205, 28, 24, 0.18);
  --col-glass-shine: rgba(205, 28, 24, 0.06);

  --col-primary: var(--primary);
  --col-primary-dim: rgba(205, 28, 24, 0.15);
  --col-primary-glow: rgba(205, 28, 24, 0.55);

  --col-accent: var(--accent-violet);
  --col-accent-dim: rgba(148, 0, 211, 0.15);
  --col-accent-glow: rgba(148, 0, 211, 0.55);

  --col-success: #a3b565;
  --col-warn: var(--warm-glow);
  --col-text: var(--text-highlight);
  --col-text-muted: rgba(216, 191, 216, 0.65);
  --font-display: "Cinzel", Georgia, "Times New Roman", serif;
  --font-ui: "Barlow Condensed", -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 28px;
  --space-xl: 48px;

  
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;
  --radius-pill: 9999px;

  
  --shadow-panel: 0 24px 64px rgba(0, 0, 0, 0.7), 0 0 0 1px var(--col-glass-border);
  --glow-primary: 0 0 12px var(--col-primary-glow), 0 0 30px rgba(205, 28, 24, 0.2);
  --glow-accent: 0 0 12px var(--col-accent-glow), 0 0 30px rgba(148, 0, 211, 0.2);

  
  --ease-snap: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 150ms;
  --dur-med: 300ms;
  --dur-slow: 500ms;
}

/* ─────────────────────────────────────────────────────────────
   2. RESET & BASE
   ───────────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

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

body {
  background-color: var(--col-bg);
  font-family: var(--font-ui);
  color: var(--col-text);
  touch-action: none;
  background-image: repeating-linear-gradient(0deg,
      transparent,
      transparent 3px,
      rgba(205, 28, 24, 0.012) 3px,
      rgba(205, 28, 24, 0.012) 4px);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ─────────────────────────────────────────────────────────────
   3. CANVAS
   ───────────────────────────────────────────────────────────── */
#gameCanvas {
  display: block;
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  cursor: crosshair;
  
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* ─────────────────────────────────────────────────────────────
   4. GLASSMORPHISM BASE
   ───────────────────────────────────────────────────────────── */
.glass-panel {
  background: var(--col-glass);
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  border: 1px solid var(--col-glass-border);
  box-shadow: var(--shadow-panel), inset 0 1px 0 rgba(255, 200, 140, 0.05), inset 0 0 40px rgba(0, 0, 0, 0.3);
  background-image: linear-gradient(150deg, var(--col-glass-shine) 0%, transparent 55%);
}

/* ─────────────────────────────────────────────────────────────
   5. SCREENS
   ───────────────────────────────────────────────────────────── */
.screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 1;
  visibility: visible;
  transition:
    opacity var(--dur-slow) var(--ease-out),
    visibility var(--dur-slow) var(--ease-out);
}

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

.screen__inner {
  width: 100%;
  max-width: 480px;
  padding: var(--space-xl) var(--space-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.screen__inner--compact {
  max-width: 400px;
  padding: var(--space-lg);
  gap: var(--space-md);
  max-height: 92vh;
  overflow-y: auto;
}

.screen--overlay {
  inset: unset;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(1);
  width: auto;
  height: auto;
  border-radius: var(--radius-lg);
  transition:
    opacity var(--dur-med) var(--ease-out),
    visibility var(--dur-med) var(--ease-out),
    transform var(--dur-med) var(--ease-snap);
}

.screen--overlay.hidden {
  transform: translate(-50%, -50%) scale(0.9);
}

#leaderboardScreen {
  border-color: rgba(155, 19, 19, 0.4);
}

#upgradesScreen,
#ascensionScreen,
#levelUpScreen {
  border-color: rgba(148, 0, 211, 0.4);
}

.screen__title {
  font-family: var(--font-display);
  font-size: calc(1.8rem * var(--ui-scale) * var(--text-scale));
  color: var(--col-primary);
  letter-spacing: 3px;
  text-shadow: var(--glow-primary);
  text-align: center;
}

.screen__subtitle {
  font-size: calc(0.95rem * var(--ui-scale) * var(--text-scale));
  color: var(--col-text-muted);
  text-align: center;
  letter-spacing: 1px;
}

/* ─────────────────────────────────────────────────────────────
   6. LOGO LOCKUP
   ───────────────────────────────────────────────────────────── */
.logo-lockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.logo-sub {
  font-family: var(--font-ui);
  font-size: calc(0.75rem * var(--ui-scale) * var(--text-scale));
  letter-spacing: 5px;
  color: var(--col-text-muted);
  text-transform: uppercase;
}

.logo-title {
  font-family: var(--font-display);
  font-size: calc(4rem * var(--ui-scale) * var(--text-scale));
  font-weight: 900;
  color: var(--col-primary);
  letter-spacing: 4px;
  text-shadow:
    0 0 20px var(--col-primary-glow),
    0 0 60px rgba(205, 28, 24, 0.3),
    0 0 100px rgba(205, 28, 24, 0.1);
  animation: neon-flicker 6s ease-in-out infinite;
  
  will-change: opacity;
}

@keyframes neon-flicker {

  0%,
  95%,
  100% {
    opacity: 1;
  }

  96% {
    opacity: 0.85;
  }

  97% {
    opacity: 1;
  }

  98% {
    opacity: 0.9;
  }

  99% {
    opacity: 1;
  }
}

.logo-line {
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--col-primary), transparent);
  box-shadow: 0 0 8px var(--col-primary-glow);
}

/* ─────────────────────────────────────────────────────────────
   7. START FORM
   ───────────────────────────────────────────────────────────── */
.start-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
}

.input-field {
  width: 85%;
  padding: calc(14px * var(--ui-scale)) calc(20px * var(--ui-scale));
  font-family: var(--font-ui);
  font-size: calc(1.1rem * var(--ui-scale) * var(--text-scale));
  font-weight: 600;
  letter-spacing: 2px;
  text-align: center;
  text-transform: uppercase;
  color: var(--col-text);
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid var(--col-glass-border);
  border-radius: var(--radius-md);
  outline: none;
  transition:
    border-color var(--dur-med) var(--ease-out),
    box-shadow var(--dur-med) var(--ease-out);
}

.input-field::placeholder {
  color: var(--col-text-muted);
  letter-spacing: 1px;
  text-transform: none;
  font-weight: 400;
}

.input-field:focus {
  border-color: var(--col-primary);
  box-shadow: var(--glow-primary), inset 0 0 20px rgba(205, 28, 24, 0.05);
}

/* ─────────────────────────────────────────────────────────────
   7b. FOCUS STATES (keyboard navigation)
   ───────────────────────────────────────────────────────────── */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--col-primary);
  outline-offset: 3px;
}

.input-field:focus-visible {
  outline: 2px solid var(--col-primary);
  outline-offset: 2px;
}

/* ─────────────────────────────────────────────────────────────
   8. BUTTONS
   ───────────────────────────────────────────────────────────── */
button {
  position: relative;
  cursor: pointer;
  border: none;
  font-family: var(--font-ui);
  font-weight: 700;
  letter-spacing: 2px;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition:
    transform var(--dur-fast) var(--ease-snap),
    box-shadow var(--dur-med) var(--ease-out),
    background-color var(--dur-med) var(--ease-out);
  
  will-change: transform;
}

button:active {
  transform: scale(0.94) !important;
}

.btn--primary {
  padding: calc(16px * var(--ui-scale)) calc(56px * var(--ui-scale));
  font-size: calc(1.1rem * var(--ui-scale) * var(--text-scale));
  font-family: var(--font-display);
  letter-spacing: 4px;
  color: var(--col-bg);
  background: var(--col-primary);
  box-shadow: var(--glow-primary), 0 4px 20px rgba(205, 28, 24, 0.3);
}

.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--glow-primary), 0 8px 32px rgba(205, 28, 24, 0.45);
}

.btn__glow {
  position: absolute;
  inset: -50%;
  background: conic-gradient(transparent 0deg, rgba(205, 28, 24, 0.3) 90deg, transparent 180deg);
  animation: btn-spin 3s linear infinite;
  z-index: -1;
  will-change: transform;
}

@keyframes btn-spin {
  to {
    transform: rotate(360deg);
  }
}

.btn--upgrade {
  padding: calc(11px * var(--ui-scale)) calc(18px * var(--ui-scale));
  font-size: calc(0.95rem * var(--ui-scale) * var(--text-scale));
  letter-spacing: 1px;
  color: var(--col-text);
  background: var(--col-primary-dim);
  border: 1px solid var(--col-glass-border);
  text-align: left;
  width: 100%;
  border-radius: var(--radius-sm);
}

.btn--upgrade:hover {
  background: var(--primary-deep);
  color: var(--text-highlight);
  border-color: var(--primary-deep);
  box-shadow: var(--glow-primary);
  transform: translateX(4px);
}

.btn--danger {
  padding: calc(14px * var(--ui-scale)) calc(36px * var(--ui-scale));
  font-size: calc(1rem * var(--ui-scale) * var(--text-scale));
  font-family: var(--font-display);
  letter-spacing: 2px;
  color: var(--col-text);
  background: var(--col-accent-dim);
  border: 1px solid rgba(148, 0, 211, 0.4);
  box-shadow: var(--glow-accent);
}

.btn--danger:hover {
  background: var(--col-accent);
  color: var(--text-highlight);
  box-shadow: var(--glow-accent), 0 8px 32px rgba(148, 0, 211, 0.4);
}

.btn--menu {
  padding: calc(14px * var(--ui-scale)) calc(32px * var(--ui-scale));
  font-size: calc(1rem * var(--ui-scale) * var(--text-scale));
  font-family: var(--font-display);
  letter-spacing: 2px;
  color: var(--col-text);
  background: rgba(205, 28, 24, 0.08);
  border: 1px solid rgba(205, 28, 24, 0.35);
  box-shadow: var(--glow-primary);
}

.btn--menu:hover {
  background: var(--primary-deep);
  color: var(--text-highlight);
  box-shadow: var(--glow-primary), 0 8px 32px rgba(205, 28, 24, 0.3);
}

.menu-utility-row {
  display: flex;
  gap: var(--space-sm);
  width: 100%;
}

.btn--menu-util {
  flex: 1;
  padding: calc(10px * var(--ui-scale)) calc(12px * var(--ui-scale));
  font-size: calc(0.78rem * var(--ui-scale) * var(--text-scale));
  font-family: var(--font-ui);
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--col-text-muted);
  background: rgba(205, 28, 24, 0.06);
  border: 1px solid var(--col-glass-border);
  border-radius: var(--radius-sm);
}

.btn--menu-util:hover {
  color: var(--col-text);
  background: var(--col-primary-dim);
  border-color: var(--col-primary);
}

.game-over-actions {
  position: fixed;
  bottom: calc(40px * var(--ui-scale));
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  gap: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.game-over-actions.hidden {
  display: none !important;
}

.hidden {
  display: none !important;
}

/* ─────────────────────────────────────────────────────────────
   9. UPGRADE GRID
   ───────────────────────────────────────────────────────────── */
.upgrade-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  width: 100%;
}

.upgrade-grid>.btn--upgrade:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

/* ─────────────────────────────────────────────────────────────
   10. LEADERBOARD
   ───────────────────────────────────────────────────────────── */
.leaderboard {
  width: 100%;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--col-glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  max-height: 38vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--col-primary) transparent;
}

.leaderboard::-webkit-scrollbar {
  width: 4px;
}

.leaderboard::-webkit-scrollbar-thumb {
  background: var(--col-primary);
  border-radius: var(--radius-pill);
}

.leaderboard__empty {
  text-align: center;
  color: var(--col-text-muted);
  font-size: calc(0.9rem * var(--text-scale));
  padding: var(--space-md) 0;
  letter-spacing: 1px;
}

.leaderboard table {
  width: 100%;
  border-collapse: collapse;
  font-size: calc(0.88rem * var(--ui-scale) * var(--text-scale));
}

.leaderboard th {
  font-family: var(--font-display);
  font-size: calc(0.7rem * var(--ui-scale) * var(--text-scale));
  color: var(--warm-glow);
  letter-spacing: 2px;
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--col-glass-border);
  text-align: left;
}

.leaderboard td {
  padding: 6px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--col-text-muted);
}

.leaderboard tr:first-child td {
  color: var(--warm-glow);
  font-weight: 700;
}

/* ─────────────────────────────────────────────────────────────
   11. MOBILE CONTROLS
   ───────────────────────────────────────────────────────────── */
.mobile-ui {
  display: none;
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
}

.mobile-ui--active {
  display: block;
}

.joystick {
  position: absolute;
  bottom: calc(44px * var(--ui-scale));
  left: calc(44px * var(--ui-scale));
  width: calc(120px * var(--ui-scale));
  height: calc(120px * var(--ui-scale));
  background: rgba(205, 28, 24, 0.06);
  border: 2px solid rgba(205, 28, 24, 0.25);
  border-radius: 50%;
  pointer-events: auto;
  touch-action: none;
  box-shadow: 0 0 24px rgba(205, 28, 24, 0.1);
  transition: border-color var(--dur-fast);
}

.joystick:active,
.joystick--active {
  border-color: rgba(205, 28, 24, 0.6);
  box-shadow: 0 0 24px rgba(205, 28, 24, 0.35);
}

.joystick__knob {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 48%;
  height: 48%;
  background: radial-gradient(circle at 35% 35%, rgba(205, 28, 24, 0.9), rgba(205, 28, 24, 0.4));
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  box-shadow: 0 0 12px rgba(205, 28, 24, 0.5);
  transition: width var(--dur-fast), height var(--dur-fast);
  
  will-change: transform;
}

.btn--shoot {
  position: absolute;
  bottom: calc(44px * var(--ui-scale));
  right: calc(44px * var(--ui-scale));
  width: calc(90px * var(--ui-scale));
  height: calc(90px * var(--ui-scale));
  border-radius: 50%;
  background: var(--col-accent-dim);
  border: 2px solid rgba(148, 0, 211, 0.5);
  color: var(--col-text);
  font-family: var(--font-display);
  font-size: calc(0.7rem * var(--ui-scale) * var(--text-scale));
  letter-spacing: 2px;
  pointer-events: auto;
  backdrop-filter: blur(6px);
  box-shadow: var(--glow-accent);
  transition: background var(--dur-fast), box-shadow var(--dur-fast);
}

.btn--shoot:active {
  background: var(--col-accent);
  box-shadow: var(--glow-accent), 0 0 32px rgba(148, 0, 211, 0.7);
}

.btn--pause {
  position: absolute;
  top: calc(20px * var(--ui-scale));
  right: calc(20px * var(--ui-scale));
  width: calc(52px * var(--ui-scale));
  height: calc(52px * var(--ui-scale));
  border-radius: 50%;
  background: rgba(205, 28, 24, 0.08);
  border: 2px solid rgba(205, 28, 24, 0.35);
  color: var(--col-primary);
  font-size: calc(1.3rem * var(--ui-scale) * var(--text-scale));
  pointer-events: auto;
  backdrop-filter: blur(6px);
  box-shadow: var(--glow-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-fast), box-shadow var(--dur-fast);
}

.btn--pause:active {
  background: rgba(205, 28, 24, 0.25);
  box-shadow: var(--glow-primary), 0 0 32px rgba(205, 28, 24, 0.5);
}

.btn--quit {
  position: absolute;
  top: calc(82px * var(--ui-scale));
  right: calc(20px * var(--ui-scale));
  width: calc(52px * var(--ui-scale));
  height: calc(52px * var(--ui-scale));
  border-radius: 50%;
  background: rgba(148, 0, 211, 0.08);
  border: 2px solid rgba(148, 0, 211, 0.35);
  color: var(--col-accent);
  font-size: calc(1.2rem * var(--ui-scale) * var(--text-scale));
  pointer-events: auto;
  backdrop-filter: blur(6px);
  box-shadow: var(--glow-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-fast), box-shadow var(--dur-fast);
}

.btn--quit:active {
  background: rgba(148, 0, 211, 0.3);
}

@media (hover: hover) and (pointer: fine) {
  .btn--shoot:hover {
    background: rgba(148, 0, 211, 0.22);
    box-shadow: var(--glow-accent), 0 0 28px rgba(148, 0, 211, 0.35);
  }

  .btn--pause:hover {
    background: rgba(205, 28, 24, 0.18);
  }

  .btn--quit:hover {
    background: rgba(148, 0, 211, 0.18);
  }
}

.mobile-ui.paused .joystick,
.mobile-ui.paused .btn--shoot,
.mobile-ui.paused .btn--weapon {
  opacity: 0.25;
  pointer-events: none;
  transition: opacity var(--dur-fast);
}

.mobile-ui.game-over .joystick,
.mobile-ui.game-over .btn--shoot,
.mobile-ui.game-over .btn--weapon,
.mobile-ui.game-over .btn--pause {
  display: none;
}

/* ─────────────────────────────────────────────────────────────
   12. RESPONSIVE BREAKPOINTS
   ───────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .logo-title {
    font-size: calc(2.8rem * var(--ui-scale) * var(--text-scale));
  }

  .screen__inner {
    padding: var(--space-lg) var(--space-md);
    gap: var(--space-md);
  }

  .upgrade-grid {
    grid-template-columns: 1fr;
  }

  .upgrade-grid>.btn--upgrade:last-child:nth-child(odd) {
    grid-column: unset;
  }
}

@media (max-width: 400px) {
  .logo-title {
    font-size: calc(2.2rem * var(--text-scale));
  }

  .btn--primary {
    padding: 14px 36px;
  }
}

@media (orientation: landscape) and (max-height: 500px) {
  :root {
    --ui-scale: 0.75;
  }

  .joystick {
    width: 90px;
    height: 90px;
    bottom: 16px;
    left: 16px;
  }

  .btn--shoot {
    width: 70px;
    height: 70px;
    bottom: 16px;
    right: 16px;
  }

  .btn--pause {
    top: 10px;
    right: 10px;
    width: 44px;
    height: 44px;
  }

  
  .btn--weapon {
    top: 10px;
    right: 62px;
    width: 58px;
    height: 44px;
  }

  .btn--quit {
    top: 62px;
    right: 10px;
    width: 44px;
    height: 44px;
  }

  .coin-shop,
  .screen__inner {
    overflow-y: auto;
    max-height: 100vh;
  }

  
  .howto-inner {
    max-height: 96vh;
  }

  .howto-content {
    max-height: 70vh;
  }

  .game-over-actions {
    max-height: 92vh;
    overflow-y: auto;
    padding: 6px 0;
  }

  .run-summary {
    padding: 0.5rem 0.85rem;
  }

  .run-summary__row {
    padding: 0.12rem 0;
  }
}

/* ─────────────────────────────────────────────────────────────
   12b. ROTATE-TO-LANDSCAPE PROMPT — touch devices held in portrait; game.js pauses while visible
   ───────────────────────────────────────────────────────────── */
.rotate-prompt {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 300;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  background: rgba(20, 4, 13, 0.97);
  text-align: center;
  padding: var(--space-lg);
}

.rotate-prompt__icon {
  font-size: calc(3rem * var(--text-scale));
  color: var(--col-primary);
  animation: rotate-prompt-spin 1.6s ease-in-out infinite;
}

.rotate-prompt__text {
  font-family: var(--font-ui);
  font-size: calc(1rem * var(--text-scale));
  letter-spacing: 0.04em;
  color: var(--col-text);
  max-width: 26ch;
}

@keyframes rotate-prompt-spin {
  0%, 100% { transform: rotate(0deg); }
  50%      { transform: rotate(-90deg); }
}

@media (orientation: portrait) and (hover: none) and (pointer: coarse) {
  .rotate-prompt {
    display: flex;
  }
}

/* ─────────────────────────────────────────────────────────────
   13. SCROLLBAR (Firefox)
   ───────────────────────────────────────────────────────────── */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--col-primary) transparent;
}

/* ─────────────────────────────────────────────────────────────
   14. PRINT SUPPRESSION
   ───────────────────────────────────────────────────────────── */
@media print {
  body {
    display: none;
  }
}

/* ── Coin Shop (lives inside #upgradesScreen modal — see SCREENS section) ── */
.coin-shop {
  position: static;
  width: min(360px, 84vw);
  max-height: 60vh;
  overflow-y: auto;
  padding-top: var(--space-sm);
}

.shop-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid rgba(205, 28, 24, 0.18);
  padding-bottom: 0.5rem;
}

.shop-title {
  font-family: var(--font-display);
  font-size: calc(0.75rem * var(--text-scale));
  font-weight: 700;
  color: var(--warm-glow);
  letter-spacing: 0.06em;
}

.shop-coins {
  font-family: var(--font-ui);
  font-size: calc(0.95rem * var(--text-scale));
  font-weight: 700;
  color: #feca57;
}

.shop-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

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

.shop-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.shop-label {
  font-family: var(--font-ui);
  font-size: calc(0.9rem * var(--text-scale));
  font-weight: 700;
  color: var(--col-text);
}

.shop-desc {
  font-family: var(--font-ui);
  font-size: calc(0.72rem * var(--text-scale));
  color: rgba(211,211,255,0.45);
}

.btn--shop {
  font-family: var(--font-ui);
  font-size: calc(0.82rem * var(--text-scale));
  font-weight: 700;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}

.btn--shop-buy  { background: rgba(205,28,24,0.15); color: var(--warm-glow); border: 1px solid rgba(205,28,24,0.5); }
.btn--shop-buy:hover { background: rgba(205,28,24,0.28); }
.btn--shop-poor { background: rgba(255,255,255,0.05); color: rgba(211,211,255,0.3); border: 1px solid rgba(255,255,255,0.1); cursor: not-allowed; }
.btn--shop-maxed { background: rgba(163,181,101,0.12); color: var(--col-success); border: 1px solid rgba(163,181,101,0.35); cursor: default; }


/* ─────────────────────────────────────────────────────────────
   C5. MUTE BUTTON — top-right inside start screen panel
   ───────────────────────────────────────────────────────────── */
.btn--mute {
  position: absolute;
  top: calc(18px * var(--ui-scale));
  right: calc(18px * var(--ui-scale));
  width: calc(40px * var(--ui-scale));
  height: calc(40px * var(--ui-scale));
  border-radius: 50%;
  background: rgba(205, 28, 24, 0.08);
  border: 1px solid rgba(205, 28, 24, 0.35);
  color: var(--col-primary);
  font-size: calc(1.1rem * var(--ui-scale) * var(--text-scale));
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(6px);
  box-shadow: var(--glow-primary);
  transition: background var(--dur-fast);
  pointer-events: auto;
  z-index: 110;
}

.btn--mute:hover {
  background: rgba(205, 28, 24, 0.22);
}

/* ─────────────────────────────────────────────────────────────
   C6. HOW-TO-PLAY BUTTON — reuses .btn--mute's circle styling
   ───────────────────────────────────────────────────────────── */
.btn--howto {
  right: calc(66px * var(--ui-scale));
}

.btn--accessibility {
  right: calc(114px * var(--ui-scale));
}

/* ─────────────────────────────────────────────────────────────
   C7. HOW-TO-PLAY MODAL
   ───────────────────────────────────────────────────────────── */
.howto-inner {
  position: relative;
  max-height: 82vh;
}

.btn--close {
  position: absolute;
  top: calc(4px * var(--ui-scale));
  right: calc(4px * var(--ui-scale));
  width: calc(30px * var(--ui-scale));
  height: calc(30px * var(--ui-scale));
  border-radius: 50%;
  background: rgba(148, 0, 211, 0.1);
  border: 1px solid rgba(148, 0, 211, 0.4);
  color: var(--col-accent);
  font-size: calc(0.85rem * var(--ui-scale) * var(--text-scale));
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.btn--close:hover {
  background: var(--col-accent);
  color: var(--text-highlight);
}

.howto-content {
  width: 100%;
  max-height: 56vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--col-primary) transparent;
}

.howto-content::-webkit-scrollbar {
  width: 4px;
}

.howto-content::-webkit-scrollbar-thumb {
  background: var(--col-primary);
  border-radius: var(--radius-pill);
}

.howto-heading {
  font-family: var(--font-display);
  font-size: calc(0.8rem * var(--ui-scale) * var(--text-scale));
  color: var(--warm-glow);
  letter-spacing: 2px;
  margin-bottom: var(--space-xs);
}

.howto-text {
  font-size: calc(0.85rem * var(--ui-scale) * var(--text-scale));
  color: var(--col-text-muted);
  line-height: 1.5;
}

.howto-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.howto-list li {
  font-size: calc(0.85rem * var(--ui-scale) * var(--text-scale));
  color: var(--col-text-muted);
  line-height: 1.4;
}

.howto-key {
  display: inline-block;
  font-family: var(--font-display);
  font-size: calc(0.68rem * var(--text-scale));
  color: var(--warm-glow);
  background: rgba(205, 28, 24, 0.1);
  border: 1px solid rgba(205, 28, 24, 0.35);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  margin-right: 2px;
}

/* ─────────────────────────────────────────────────────────────
   C8. ACCESSIBILITY MODAL CONTROLS
   ───────────────────────────────────────────────────────────── */
.a11y-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.a11y-slider {
  flex: 1;
  accent-color: var(--col-primary);
}

.a11y-value {
  font-family: var(--font-display);
  font-size: calc(0.75rem * var(--text-scale));
  color: var(--warm-glow);
  min-width: 3.2em;
  text-align: right;
}

.a11y-row--options {
  gap: var(--space-sm);
}

.a11y-option {
  flex: 1;
  padding: 6px 4px;
  font-size: calc(0.75rem * var(--text-scale));
  font-family: var(--font-display);
  border: 1px solid rgba(205, 28, 24, 0.35);
  background: rgba(205, 28, 24, 0.06);
  color: var(--col-text-muted);
  border-radius: var(--radius-sm);
  transition: background var(--dur-fast), color var(--dur-fast);
}

.a11y-option.active {
  background: var(--primary-deep);
  color: var(--text-highlight);
  border-color: var(--primary-deep);
}

.a11y-row--toggle {
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
}

.a11y-row--toggle input {
  margin-top: 3px;
  flex-shrink: 0;
  accent-color: var(--col-primary);
}

/* ─────────────────────────────────────────────────────────────
   C3. WEAPON SWITCH BUTTON — top-right mobile UI
   ───────────────────────────────────────────────────────────── */
.btn--weapon {
  position: absolute;
  top: calc(20px * var(--ui-scale));
  right: calc(84px * var(--ui-scale));
  width: calc(72px * var(--ui-scale));
  height: calc(52px * var(--ui-scale));
  border-radius: var(--radius-sm);
  background: rgba(205, 28, 24, 0.08);
  border: 1px solid rgba(205, 28, 24, 0.35);
  color: var(--warm-glow);
  font-family: var(--font-display);
  font-size: calc(0.65rem * var(--text-scale));
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(6px);
  box-shadow: var(--glow-primary);
  pointer-events: auto;
  transition: background var(--dur-fast), opacity var(--dur-fast);
}

.btn--weapon:active {
  background: rgba(205, 28, 24, 0.28);
}

.btn--weapon.is-disabled,
.btn--weapon-pc.is-disabled {
  opacity: 0.25;
  pointer-events: none;
}

/* ─────────────────────────────────────────────────────────────
   C3-PC. DESKTOP WEAPON-SWITCH BUTTON — shown only via (hover:hover)
   and (pointer:fine), so touch devices never see it
   ───────────────────────────────────────────────────────────── */
.btn--weapon-pc {
  display: none;
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 50;
  width: 84px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(205, 28, 24, 0.08);
  border: 1px solid rgba(205, 28, 24, 0.35);
  color: var(--warm-glow);
  font-family: var(--font-display);
  font-size: calc(0.7rem * var(--text-scale));
  letter-spacing: 1px;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(6px);
  box-shadow: var(--glow-primary);
  pointer-events: auto;
  transition: background var(--dur-fast), box-shadow var(--dur-fast), opacity var(--dur-fast);
}

@media (hover: hover) and (pointer: fine) {
  .btn--weapon-pc {
    display: flex;
  }
}

.btn--weapon-pc:hover {
  background: rgba(205, 28, 24, 0.2);
  box-shadow: var(--glow-primary), 0 0 24px rgba(205, 28, 24, 0.35);
}

.btn--weapon-pc:active {
  background: rgba(205, 28, 24, 0.32);
}

/* ─────────────────────────────────────────────────────────────
   C4. RUN SUMMARY — injected into #gameOverActions on game over
   ───────────────────────────────────────────────────────────── */
.run-summary {
  width: min(320px, 90vw);
  flex-basis: 100%;
  background: rgba(20, 4, 13, 0.88);
  border: 1px solid rgba(205, 28, 24, 0.28);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 20px rgba(205, 28, 24, 0.1);
  margin: 0 auto 0.75rem;
}

.run-summary__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.2rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-family: var(--font-ui);
}

.run-summary__row:last-child {
  border-bottom: none;
}

.run-summary__label {
  font-size: calc(0.78rem * var(--text-scale));
  font-weight: 700;
  color: rgba(211, 211, 255, 0.5);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.run-summary__value {
  font-size: calc(0.92rem * var(--text-scale));
  font-weight: 700;
  color: var(--col-primary);
  letter-spacing: 1px;
}

/* ─────────────────────────────────────────────────────────────
   C6. QUIT TOAST
   ───────────────────────────────────────────────────────────── */
.quit-toast {
  position: fixed;
  left: 50%;
  bottom: 48px;
  transform: translate(-50%, 12px);
  background: rgba(20, 4, 13, 0.92);
  border: 1px solid rgba(205, 28, 24, 0.35);
  border-radius: 10px;
  padding: 0.65rem 1.1rem;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: calc(0.95rem * var(--text-scale));
  letter-spacing: 0.03em;
  color: #feca57;
  box-shadow: 0 0 20px rgba(205, 28, 24, 0.12);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  z-index: 200;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.quit-toast--show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ─────────────────────────────────────────────────────────────
   DAILY CHALLENGE TOGGLE
   ───────────────────────────────────────────────────────────── */
.daily-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: calc(0.95rem * var(--ui-scale) * var(--text-scale));
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--col-text-muted);
  user-select: none;
}

.daily-toggle input[type="checkbox"] {
  width: calc(18px * var(--ui-scale));
  height: calc(18px * var(--ui-scale));
  accent-color: var(--col-primary);
  cursor: pointer;
}

.daily-toggle:has(input:checked) {
  color: var(--warm-glow);
}

.daily-toggle__date {
  color: var(--col-text-muted);
  font-weight: 400;
  font-size: calc(0.85em * var(--text-scale));
}

/* ─────────────────────────────────────────────────────────────
   ASCENSION MOD BUTTONS
   ───────────────────────────────────────────────────────────── */
.upgrade-grid--ascension {
  grid-template-columns: 1fr;
}

.btn--ascension {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: calc(4px * var(--ui-scale));
  text-align: left;
}

.upgrade-title {
  font-family: var(--font-ui);
  font-size: calc(1rem * var(--ui-scale) * var(--text-scale));
  font-weight: 700;
  letter-spacing: 0.5px;
}

.upgrade-desc {
  font-family: var(--font-ui);
  font-size: calc(0.78rem * var(--ui-scale) * var(--text-scale));
  font-weight: 400;
  letter-spacing: 0.2px;
  color: rgba(211, 211, 255, 0.55);
}

.btn--ascension:hover .upgrade-desc {
  color: rgba(211, 211, 255, 0.85);
}

.btn--buildmod {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: calc(4px * var(--ui-scale));
  text-align: left;
  border-color: rgba(148, 0, 211, 0.55);
  box-shadow: 0 0 16px rgba(148, 0, 211, 0.2);
}

.btn--buildmod .upgrade-title {
  color: var(--accent-magenta);
}

.btn--buildmod:hover .upgrade-desc {
  color: rgba(211, 211, 255, 0.85);
}

/* ─────────────────────────────────────────────────────────────
   DAILY CHALLENGE HISTORY STRIP
   ───────────────────────────────────────────────────────────── */
.daily-history {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: calc(14px * var(--ui-scale));
}

.daily-pips {
  display: flex;
  gap: calc(4px * var(--ui-scale));
}

.daily-pip {
  width: calc(8px * var(--ui-scale));
  height: calc(8px * var(--ui-scale));
  border-radius: 50%;
  background: rgba(211, 211, 255, 0.12);
  border: 1px solid rgba(211, 211, 255, 0.15);
}

.daily-pip--played {
  background: var(--col-primary);
  border-color: var(--col-primary);
  box-shadow: 0 0 6px rgba(205, 28, 24, 0.6);
}

.daily-streak {
  font-family: var(--font-ui);
  font-size: calc(0.78rem * var(--ui-scale) * var(--text-scale));
  font-weight: 600;
  color: var(--col-text-muted);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}