/* Animations — twin states + materialization phases.
   Pulse is reserved for Investigating only; Active is calm. */

/* ============================================================================
   Twin states — applied to a wrapping element that contains a sparkle icon.
   ============================================================================ */

.twin-state {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  transition: opacity var(--transition-standard) ease;
}

/* Idle — nothing to investigate. Visually muted, no animation. */
.twin-idle {
  opacity: 0.5;
}

/* Active — watching against goals. Standard saturation, no animation. */
.twin-active {
  opacity: 1;
}

/* Investigating — actively reasoning. Sparkle pulses ~1s cycle. */
.twin-investigating {
  opacity: 1;
}

.twin-investigating .sparkle-icon {
  animation: pulse-investigating var(--pulse-investigating) ease-in-out infinite;
  transform-origin: center;
}

@keyframes pulse-investigating {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(1.18);
  }
}

/* ============================================================================
   Materialization phases — reasoning → generating → content.
   ============================================================================ */

.reasoning-phase {
  font-size: var(--text-small);
  color: var(--color-gray-500);
}

.reasoning-label {
  font-size: var(--text-meta);
  color: var(--color-gray-500);
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}

.reasoning-bullets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.reasoning-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-style: italic;
  color: var(--color-gray-400);
  line-height: 1.6;
}

.bullet-dot {
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 9999px;
  background: var(--color-gray-400);
  flex-shrink: 0;
  margin-top: 0.55rem;
}

.bullet-text {
  flex: 1;
}

.generating-phase {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-small);
  color: var(--color-gray-600);
}

.generating-phase .sparkle-icon {
  animation: pulse-investigating var(--pulse-investigating) ease-in-out infinite;
}

.generating-dots::after {
  content: '';
  display: inline-block;
  animation: generating-dots 1.4s steps(4, end) infinite;
}

@keyframes generating-dots {
  0%   { content: ''; }
  25%  { content: '.'; }
  50%  { content: '..'; }
  75%  { content: '...'; }
  100% { content: ''; }
}

/* Content phase — fades in once reasoning + generating complete. */
.content-phase {
  opacity: 0;
  transition: opacity var(--materialize-fade) ease;
}

.content-phase.is-visible {
  opacity: 1;
}

/* Trace card fade-in. */
.trace-card-enter {
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--trace-card-fade) ease, transform var(--trace-card-fade) ease;
}

.trace-card-enter.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Generic spin — for loader-2 / refresh-cw style spinners. */
.spin {
  animation: spin 1s linear infinite;
  transform-origin: center;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}