/* =====================================================================
   Theme: Thinking Indicator (21st.dev style)
   ===================================================================== */

/* Container */
.agent-thinking-step {
  margin: 10px 0;
  padding: 0;
  border: none !important;
  background: transparent !important;
}

/* Thinking header (collapsed state) */
.agent-thinking-step .thinking-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  cursor: pointer;
  user-select: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  color: #94a3b8;
}

.agent-thinking-step .thinking-header:hover {
  background: rgba(139, 92, 246, 0.08);
  border-color: rgba(139, 92, 246, 0.2);
  color: #cbd5e1;
}

/* Spinner (replaces brain icon) */
.agent-thinking-step .thinking-header i:first-child {
  display: none; /* ซ่อน brain icon เก่า */
}

.agent-thinking-step .thinking-header::before {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-top-color: #a78bfa;
  border-radius: 50%;
  animation: thinkingSpin 1s linear infinite;
  flex-shrink: 0;
}

/* Spinner stopped (when done) */
.agent-thinking-step.expanded .thinking-header::before,
.agent-thinking-step.done .thinking-header::before {
  animation: none;
  border-color: rgba(167, 139, 250, 0.6);
  border-top-color: transparent;
}

@keyframes thinkingSpin {
  to { transform: rotate(360deg); }
}

/* Label */
.agent-thinking-step .thinking-summary {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
  color: #cbd5e1;
  letter-spacing: -0.01em;
}

/* Timer */
.agent-thinking-step .thinking-timer,
.agent-thinking-step .thinking-duration {
  font-size: 11.5px;
  color: #64748b;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 400;
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 8px;
  border-radius: 6px;
  margin-left: auto;
  margin-right: 6px;
}

/* Chevron */
.agent-thinking-step .thinking-chevron {
  font-size: 10px !important;
  color: #64748b;
  transition: transform 0.25s ease, color 0.2s ease;
  opacity: 0.6;
}

.agent-thinking-step:hover .thinking-chevron {
  color: #a78bfa;
  opacity: 1;
}

.agent-thinking-step.expanded .thinking-chevron {
  transform: rotate(90deg);
  color: #a78bfa;
  opacity: 1;
}

/* Thinking content (expanded) */
.agent-thinking-step .thinking-full {
  display: none;
  margin: 8px 0 0 0;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  max-height: 300px;
  overflow-y: auto;
  animation: thinkingFade 0.3s ease;
}

@keyframes thinkingFade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.agent-thinking-step.expanded .thinking-full {
  display: block;
}

/* Context box style (เหมือน 21st.dev) */
.agent-thinking-step .thinking-full {
  position: relative;
}

.agent-thinking-step .thinking-full::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(167, 139, 250, 0.3),
    transparent
  );
}

/* Paragraphs inside thinking */
.agent-thinking-step .thinking-full p {
  margin: 0.5em 0;
}

.agent-thinking-step .thinking-full p:first-child { margin-top: 0; }
.agent-thinking-step .thinking-full p:last-child { margin-bottom: 0; }

/* Streaming text (while thinking) */
.agent-thinking-step .thinking-stream-pre {
  margin: 0;
  padding: 0;
  background: transparent;
  border: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: 1.7;
  color: inherit;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Pulse effect while thinking */
.agent-thinking-step:not(.done) .thinking-header {
  position: relative;
  overflow: hidden;
}

.agent-thinking-step:not(.done) .thinking-header::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(167, 139, 250, 0.1),
    transparent
  );
  animation: thinkingShimmer 2s infinite;
}

@keyframes thinkingShimmer {
  to { left: 100%; }
}

/* Light mode */
:not(.dark) .agent-thinking-step .thinking-header {
  background: rgba(0, 0, 0, 0.02);
  border-color: rgba(0, 0, 0, 0.06);
  color: #475569;
}

:not(.dark) .agent-thinking-step .thinking-header:hover {
  background: rgba(139, 92, 246, 0.05);
}

:not(.dark) .agent-thinking-step .thinking-summary {
  color: #1e293b;
}

:not(.dark) .agent-thinking-step .thinking-full {
  background: rgba(0, 0, 0, 0.02);
  border-color: rgba(0, 0, 0, 0.06);
  color: #475569;
}

/* Mobile */
@media (max-width: 640px) {
  .agent-thinking-step .thinking-header {
    padding: 9px 10px;
  }
  
  .agent-thinking-step .thinking-summary {
    font-size: 12.5px;
  }
  
  .agent-thinking-step .thinking-full {
    padding: 12px 14px;
    font-size: 12.5px;
  }
}