client/src/index.css

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

html, body, #root {
  width: 100%;
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-overflow-scrolling: touch;
  background: #0d1117;
  color: #e6edf3;
  font-family: system-ui, -apple-system, sans-serif;
}

html {
  height: -webkit-fill-available;
}

body {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

button, input {
  touch-action: manipulation;
}

.btn-depth {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--btn-min-width, 44px);
  min-height: var(--btn-min-height, 44px);
  padding: var(--btn-padding, 0.75rem 2rem);
  border: none;
  border-radius: var(--btn-radius, 12px);
  background: var(--btn-front, hsl(345deg 100% 47%));
  color: var(--btn-text, #fff);
  cursor: pointer;
  font-size: var(--btn-font-size, 1.05rem);
  font-weight: var(--btn-font-weight, 600);
  line-height: 1.1;
  outline-offset: 4px;
  user-select: none;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  transition: all 0.12s ease;
  box-shadow:
    0 4px 0 color-mix(in srgb, var(--btn-front, hsl(345deg 100% 47%)) 65%, #000),
    0 6px 10px rgba(0,0,0,0.3);
  transform: translateY(0);
}

.btn-depth:hover:not(:disabled) {
  box-shadow:
    0 6px 0 color-mix(in srgb, var(--btn-front, hsl(345deg 100% 47%)) 65%, #000),
    0 8px 14px rgba(0,0,0,0.35);
  transform: translateY(-2px);
}

.btn-depth:active:not(:disabled) {
  box-shadow:
    0 2px 0 color-mix(in srgb, var(--btn-front, hsl(345deg 100% 47%)) 65%, #000),
    0 3px 5px rgba(0,0,0,0.3);
  transform: translateY(2px);
}

.btn-depth:disabled {
  cursor: default;
  opacity: 0.66;
  box-shadow:
    0 2px 0 color-mix(in srgb, var(--btn-front, hsl(345deg 100% 47%)) 65%, #000),
    0 3px 5px rgba(0,0,0,0.2);
  transform: translateY(2px);
}

.btn-depth:focus:not(:focus-visible) {
  outline: none;
}

.start-push-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--start-push-min-width, 44px);
  min-height: var(--start-push-min-height, 44px);
  padding: var(--btn-padding, 0.75rem 2rem);
  border: none;
  border-radius: var(--start-push-radius, 12px);
  background: transparent;
  color: transparent;
  cursor: pointer;
  font-size: var(--start-push-font-size, 1.05rem);
  font-weight: var(--start-push-font-weight, 600);
  line-height: 1.1;
  outline-offset: 4px;
  user-select: none;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  transform: translateY(0);
}

.start-push-button__shadow,
.start-push-button__edge,
.start-push-button__front {
  position: absolute;
  inset: 0;
  border-radius: var(--start-push-radius, 12px);
  pointer-events: none;
}

.start-push-button__shadow {
  background: rgba(0, 0, 0, 0.28);
  filter: blur(5px);
  transform: translateY(6px) scaleX(0.98);
}

.start-push-button__edge {
  background: color-mix(in srgb, var(--start-push-front, hsl(345deg 100% 47%)) 62%, #000);
  transform: translateY(5px);
}

.start-push-button__front {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--start-push-padding, 0.75rem 2rem);
  background: var(--start-push-front, hsl(345deg 100% 47%));
  color: var(--start-push-text, #fff);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
  transform: translateY(0);
  transition: transform 0.12s ease, filter 0.12s ease;
}

.start-push-button__front::before {
  content: attr(data-label);
}

.start-push-button:hover:not(:disabled) .start-push-button__front {
  filter: brightness(1.06);
  transform: translateY(-2px);
}

.start-push-button:active:not(:disabled) .start-push-button__front {
  transform: translateY(3px);
}

.start-push-button:disabled {
  cursor: default;
}

.start-push-button:disabled .start-push-button__front {
  filter: grayscale(0.25);
  opacity: 0.66;
  transform: translateY(3px);
}

.start-push-button:focus:not(:focus-visible) {
  outline: none;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes caro5-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@keyframes bot-float {
  0%, 100% {
    transform: translateY(-50%) translateY(0px);
  }
  50% {
    transform: translateY(-50%) translateY(-8px);
  }
}

@keyframes bot-speech-float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-4px);
  }
}

@keyframes bot-glow-pulse {
  0%, 100% {
    filter: drop-shadow(0 0 4px rgba(var(--bot-glow-color, 88, 166, 255), 0.35));
  }
  50% {
    filter: drop-shadow(0 0 16px rgba(var(--bot-glow-color, 88, 166, 255), 0.75));
  }
}

@keyframes caro5-spin {
  to { transform: rotate(360deg); }
}