.reasoning-panel {
  position: relative;
  overflow: visible;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(148, 163, 184, 0.025)),
    rgba(10, 16, 27, 0.72);
  box-shadow: none;
  animation: content-fade-in 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reasoning-panel[hidden] {
  display: none;
}

.reasoning-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 38px;
  gap: 8px;
  padding: 8px 11px;
  color: var(--text-soft);
  background: rgba(148, 163, 184, 0.055);
  cursor: pointer;
  text-align: left;
  transition:
    background 240ms cubic-bezier(0.2, 0.8, 0.2, 1),
    color 240ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reasoning-toggle:hover {
  background: rgba(var(--accent-rgb), 0.11);
  color: var(--accent-strong);
}

.reasoning-chevron {
  display: grid;
  place-items: center;
  width: 15px;
  height: 15px;
  color: var(--accent-strong);
  transition: transform 180ms ease;
}

.reasoning-title {
  font-size: 12px;
  font-weight: 730;
  letter-spacing: 0;
}

.reasoning-time {
  margin-left: auto;
  color: var(--muted-strong);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.reasoning-body {
  max-height: 320px;
  overflow: auto;
  border-top: 1px solid var(--line);
  transition:
    max-height 260ms cubic-bezier(0.2, 0.8, 0.2, 1),
    opacity 180ms ease,
    border-color 180ms ease;
}

.reasoning-effort {
  padding: 0 12px 10px 34px;
}

.reasoning-effort[hidden] {
  display: none;
}

.reasoning-effort-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
  color: var(--muted-strong);
  font-size: 11px;
  line-height: 1.2;
}

.reasoning-effort-label,
.reasoning-effort-value {
  white-space: nowrap;
}

.reasoning-effort-value {
  color: #cfe7ff;
  font-variant-numeric: tabular-nums;
}

.reasoning-effort-track {
  height: 4px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.reasoning-effort-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent), #e0f2fe);
  box-shadow: 0 0 14px rgba(var(--accent-rgb), 0.28);
  transition: width 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reasoning-effort.is-limit .reasoning-effort-fill {
  background: linear-gradient(90deg, #1d4ed8, #bfdbfe, #f8fbff);
}

.reasoning-text {
  padding: 12px 13px 13px;
  color: #c8dcf4;
  font-size: 13px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.reasoning-text h1,
.reasoning-text h2,
.reasoning-text h3,
.reasoning-text h4 {
  color: var(--accent-strong);
}

.reasoning-text strong {
  color: #f7fbff;
}

.reasoning-text .katex-display {
  margin: 0.28em 0;
}

.reasoning-preview {
  display: none;
  padding: 0 12px 13px 34px;
}

.reasoning-panel.is-collapsed.has-preview .reasoning-preview {
  display: block;
}

.reasoning-preview[hidden] {
  display: none;
}

.reasoning-preview-text {
  position: relative;
  color: #d4e9ff;
  font-size: 13px;
  line-height: 1.5;
  overflow-wrap: anywhere;
  white-space: normal;
}

.reasoning-preview-stable {
  display: contents;
}

.reasoning-preview-live {
  display: inline;
  color: #d4e9ff;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.reasoning-preview-live-chunk {
  animation: reasoning-preview-delta-in 150ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reasoning-preview-text p {
  margin: 0 0 8px;
}

.reasoning-preview-text strong,
.reasoning-preview-text h1,
.reasoning-preview-text h2,
.reasoning-preview-text h3,
.reasoning-preview-text h4 {
  color: #f7fbff;
}

.reasoning-preview-text .katex-display {
  margin: 0.22em 0;
}

.reasoning-panel.is-collapsed .reasoning-chevron {
  transform: rotate(-90deg);
}

.reasoning-panel.is-collapsed .reasoning-body {
  max-height: 0;
  opacity: 0;
  border-top-color: transparent;
}

.reasoning-panel.is-streaming {
  border-color: rgba(var(--accent-rgb), 0.34);
  box-shadow: 0 0 24px rgba(var(--accent-rgb), 0.07);
}

@keyframes reasoning-preview-delta-in {
  from {
    opacity: 0;
    filter: blur(2px);
  }

  to {
    opacity: 1;
    filter: blur(0);
  }
}