button, 
input[type="button"], 
input[type="submit"], 
input[type="reset"],
.role-btn,
.floating-qa-btn {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

nibble-card {
  display: flex;
  justify-content: center;
  flex: 0 1 auto;
}

nibble-card .game-card {
  width: 100%;
  max-width: 460px;
  box-sizing: border-box;
  background-color: var(--bg-card-body);
  border-radius: 20px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  position: relative;
  overflow: hidden;
}

nibble-card .game-body {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 580px;
  padding: 20px;
  box-sizing: border-box;
  gap: 3px;
}

.snake-help-label {
  font-size: 0.8rem;
  font-weight: bold;
  margin-top: 10px;
  margin-bottom: 6px;
  color: var(--color-accent, #d1db9e);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.snake-items-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 10px;
  background: rgba(30, 35, 25, 0.6);
  padding: 10px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.snake-legend-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
}

.snake-body-box {
  width: 14px;
  height: 14px;
  background: #b5be8a;
  border-radius: 2px;
  flex-shrink: 0;
}

.snake-food-box {
  width: 14px;
  height: 14px;
  background: #e74c3c;
  border-radius: 2px;
  flex-shrink: 0;
}

.snake-mb-0 {
  margin-bottom: 0 !important;
}

/* RETRO LED SCREEN */
.snake-led-screen {
  background-color: #0d1109;
  border: 2px solid #3b4432;
  border-radius: 6px;
  padding: 6px 0;
  width: 100%;
  max-width: 300px;
  box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.8), 0 0 5px rgba(181, 190, 138, 0.2);
  text-align: center;
  box-sizing: border-box;
  margin-bottom: 8px;
  margin-top: -10px;
  overflow: hidden;
  position: relative;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.snake-level-header {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.6rem;
  color: var(--color-accent, #d1db9e);
  text-shadow: 0 0 8px rgba(209, 219, 158, 0.8);
  letter-spacing: 0.5px;
  white-space: nowrap;
  display: block;
  width: 100%;
  text-align: center;
  text-transform: uppercase;
}

nibble-card .game-help-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-card-body);
  border-radius: 20px;
  z-index: 50;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-sizing: border-box;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

nibble-card .game-help-overlay.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

#snakeCanvasWrapper {
  position: relative;
  display: inline-block;
  border-radius: 12px;
  overflow: hidden;
  border: 2px solid #b5be8a;
  background-color: var(--bg-dark);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

canvas#snakeCanvas {
  background-color: var(--bg-dark);	
  display: block;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

.snake-controls-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: 280px;
  margin: 4px auto 2px auto;
  font-size: 0.75rem;
  color: #b5be8a;
}

.snake-mode-btn {
  padding: 2px 10px;
  font-size: 0.75rem;
}

.snake-pad-container {
  position: relative;
  width: 240px;
  height: 240px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 2px auto;
}

.snake-trackpad {
  display: grid;
  grid-template-areas:
    ".   up   ."
    "left center right"
    ".   down   .";
  grid-template-columns: 50px 50px 50px;
  grid-template-rows: 46px 46px 46px;
  gap: 4px;
  justify-content: center;
  align-items: center;
  background: rgba(30, 35, 25, 0.4);
  padding: 8px;
  border-radius: 12px;
  border: 1px solid rgba(181, 190, 138, 0.3);
  margin: 6px auto;
  touch-action: none;
}

.snake-trackpad-grid {
  display: grid;
  position: absolute;
}

.snake-swipe-pad {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 240px;
  height: 240px;
  max-width: 100%;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  background: rgba(30, 35, 25, 0.4);
  border-radius: 14px;
  border: 1px solid rgba(181, 190, 138, 0.3);
  box-sizing: border-box;
  overflow: hidden;
  justify-content: center;
  align-items: center;
}

.snake-swipe-svg {
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
  user-select: none;
}

.snake-swipe-label {
  transition: opacity 0.12s ease, fill 0.12s ease;
}

.snake-swipe-label.snake-swipe-label-active {
  opacity: 1;
  fill: #f1c40f;
}

.snake-action-row {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: 240px;
  justify-content: center;
  margin-top: 1px;
}

.snake-trackpad .control-btn {
  background: rgba(181, 190, 138, 0.1);
  border: 1px solid rgba(181, 190, 138, 0.25);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  cursor: pointer;
  color: #b5be8a;
  font-size: 0.85rem;
  transition: transform 0.08s ease, background 0.15s ease;
}

.snake-trackpad .control-btn:hover {
  background: rgba(181, 190, 138, 0.25);
}

.snake-trackpad .control-btn:active {
  background: rgba(181, 190, 138, 0.25);
  transform: scale(0.92);
}

.pad-up { grid-area: up; }
.pad-left { grid-area: left; }
.pad-center { grid-area: center; background: rgba(255, 255, 255, 0.02); border-radius: 4px; }
.pad-right { grid-area: right; }
.pad-down { grid-area: down; }

.action-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: grayscale(20%);
}

.snake-action-row .action-btn {
  height: 38px;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.snake-custom-dropdown-container {
  position: relative;
  display: inline-block;
  font-family: inherit;
  font-size: 0.85rem;
  flex: 2.2;
  min-width: 85px;
}

.snake-custom-select-trigger {
  background: var(--bg-dark, #141812);
  color: var(--color-accent, #b5be8a);
  border: 1px solid var(--color-accent, #b5be8a);
  border-radius: 8px;
  padding: 0 8px;
  height: 38px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  top: 2px;
}

.snake-custom-option.selected {
  background-color: color-mix(in srgb, var(--color-accent, #b5be8a) 20%, transparent);
  color: var(--color-accent, #b5be8a);
  font-weight: bold;
}

.snake-custom-select-trigger:hover:not(.disabled) {
  border-color: var(--color-accent, #b5be8a);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.snake-custom-select-arrow {
  font-size: 0.65rem;
  margin-left: 4px;
  transition: transform 0.25s ease;
}

.snake-custom-select-options {
  position: absolute;
  bottom: 100%;
  left: 0;
  width: 100%;
  margin-bottom: 6px;
  background: var(--bg-dark, #141812);
  border: 1px solid var(--color-accent, #b5be8a);
  border-radius: 8px;
  box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.4);
  box-sizing: border-box;
  max-height: 160px;
  overflow-y: auto;
  z-index: 100;
  min-width: 110px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent, #b5be8a) var(--bg-dark, #141812);
}

.snake-custom-select-options::-webkit-scrollbar {
  width: 6px;
}

.snake-custom-select-options::-webkit-scrollbar-track {
  background: var(--bg-dark, #141812);
  border-radius: 0 8px 8px 0;
}

.snake-custom-select-options::-webkit-scrollbar-thumb {
  background: var(--color-accent, #b5be8a);
  border-radius: 3px;
}

.snake-custom-select-options::-webkit-scrollbar-thumb:hover {
  background: rgba(181, 190, 138, 0.8);
}

.snake-custom-select-options.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.snake-custom-select-options.closing {
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
}

.snake-custom-option {
  padding: 10px 12px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
  color: var(--color-accent, #b5be8a);
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

.snake-custom-option:hover {
  background-color: var(--color-accent, #b5be8a);
  color: var(--bg-dark, #141812);
}

.snake-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(20, 24, 18, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  font-family: sans-serif;
  font-size: 18px;
  font-weight: bold;
  z-index: 10;
  box-sizing: border-box;
  padding: 15px;
  pointer-events: none;
}

@keyframes snakeSlowBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

.snake-blink-text {
  animation: snakeSlowBlink 2.5s infinite ease-in-out;
}

.snake-neon-red {
  color: #ff4d4d;
  text-shadow: 0 0 8px #ff0000, 0 0 15px #ff0000, 0 0 25px #ff0000;
}