/* AI Agent 与设计页共用消息视觉。 */
.ai-agent-message {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-bottom: 18px;
}

.ai-agent-message--user {
  align-items: flex-end;
}

.ai-agent-message--event {
  align-items: center;
  color: var(--muted, #6b7280);
  font-size: 12px;
  text-align: center;
}

.ai-agent-message__author {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  color: #111827;
  font-size: 14px;
  font-weight: 700;
}

.ai-agent-bubble {
  width: fit-content;
  max-width: 100%;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 16px;
  background: #fff;
  padding: 14px 16px;
  color: #1f2937;
  font-size: 15px;
  line-height: 1.75;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.ai-agent-bubble--user {
  max-width: 86%;
  border-color: #cbdcf6;
  background: #dbe8ff;
}

.ai-agent-message:not(.ai-agent-message--user) .ai-agent-bubble {
  white-space: pre-wrap;
  border-top-left-radius: 8px;
}

.ai-agent-message--user .ai-agent-bubble--user {
  border-top-right-radius: 8px;
}

.ai-agent-bubble--user-rich {
  white-space: pre-wrap;
  overflow: visible;
}

/* 图标和文字共用遮罩，亮光只扫过笔画。 */
.ai-agent-thinking {
  position: relative;
  display: inline-flex;
  max-width: 100%;
  color: #64647f;
  vertical-align: top;
}

.ai-agent-thinking__content {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  min-width: 0;
}

.ai-agent-thinking__icon {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin-top: 3px;
}

.ai-agent-thinking__shimmer {
  position: absolute;
  inset: 0;
  color: #eeedf8;
  pointer-events: none;
  user-select: none;
  -webkit-mask-image: linear-gradient(100deg, transparent 42%, #000 50%, transparent 58%);
  mask-image: linear-gradient(100deg, transparent 42%, #000 50%, transparent 58%);
  -webkit-mask-size: 300% 100%;
  mask-size: 300% 100%;
  animation: ai-agent-thinking-shimmer 2.8s linear infinite;
}

@keyframes ai-agent-thinking-shimmer {
  0% {
    -webkit-mask-position: 100% 0;
    mask-position: 100% 0;
  }
  80%, 100% {
    -webkit-mask-position: 0% 0;
    mask-position: 0% 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-agent-thinking__shimmer {
    display: none;
    animation: none;
  }
}

/* AI Agent 与设计页共用的生图点阵扫光。 */
.ai-agent-generation-placeholder {
  --ai-agent-dot-field-width: min(68%, 520px);
  --ai-agent-dot-field-height: min(48%, 420px);
  --ai-agent-dot-field-top: 57%;
  --ai-agent-dot-column-gap: 13px;
  --ai-agent-dot-row-gap: 12px;
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: inherit;
  background:
    radial-gradient(circle at 50% 46%, rgba(255, 255, 255, 0.48), transparent 46%),
    #f1f1f1;
  color: #4b5563;
}

.ai-agent-generation-placeholder__dots {
  position: absolute;
  left: 50%;
  top: var(--ai-agent-dot-field-top);
  display: grid;
  width: var(--ai-agent-dot-field-width);
  height: var(--ai-agent-dot-field-height);
  grid-template-columns: repeat(var(--ai-agent-dot-columns, 15), minmax(0, 1fr));
  grid-template-rows: repeat(var(--ai-agent-dot-rows, 17), minmax(0, 1fr));
  column-gap: var(--ai-agent-dot-column-gap);
  row-gap: var(--ai-agent-dot-row-gap);
  transform: translate(-50%, -50%);
}

.ai-agent-generation-placeholder__dot {
  width: var(--ai-agent-dot-size, 4px);
  height: var(--ai-agent-dot-size, 4px);
  align-self: center;
  justify-self: center;
  border-radius: 999px;
  background: #adadad;
  opacity: 0.12;
  transform: scale(0.45);
  animation: ai-agent-placeholder-dot-wave 4s ease-in-out infinite;
  animation-delay: var(--ai-agent-dot-delay, 0ms);
}

.ai-agent-generation-placeholder--portrait {
  --ai-agent-dot-field-width: min(72%, 500px);
  --ai-agent-dot-field-height: min(56%, 430px);
  --ai-agent-dot-field-top: 60%;
}

.ai-agent-generation-placeholder--landscape {
  --ai-agent-dot-field-width: min(78%, 560px);
  --ai-agent-dot-field-height: min(42%, 260px);
  --ai-agent-dot-field-top: 61%;
}

.ai-agent-generation-placeholder--square {
  --ai-agent-dot-field-width: min(72%, 500px);
  --ai-agent-dot-field-height: min(52%, 360px);
  --ai-agent-dot-field-top: 59%;
}

@keyframes ai-agent-placeholder-dot-wave {
  0%,
  100% {
    opacity: 0.07;
    transform: scale(0.45);
  }

  28% {
    opacity: 0.22;
    transform: scale(0.65);
  }

  45% {
    opacity: 0.86;
    transform: scale(1);
  }

  62% {
    opacity: 0.25;
    transform: scale(0.7);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-agent-generation-placeholder__dot {
    animation: none;
    opacity: 0.35;
    transform: scale(0.85);
  }
}