.webllm-chat {
  --webllm-bg: linear-gradient(135deg, #f4faf6 0%, #eef5f0 55%, #f9f8f1 100%);
  --webllm-surface: rgba(255, 255, 255, 0.9);
  --webllm-border: #c7d8cc;
  --webllm-border-strong: #86a891;
  --webllm-ink: #1f2a24;
  --webllm-muted: #56655b;
  --webllm-accent: #2f6f44;
  --webllm-accent-ink: #ffffff;
  --webllm-warning: #7f6420;
  border: 1px solid var(--webllm-border);
  border-radius: 1rem;
  padding: 1rem;
  background: var(--webllm-bg);
  box-shadow: 0 16px 40px rgba(32, 53, 39, 0.08);
}

.webllm-chat__hero {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.webllm-chat__hero-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.webllm-chat__mode-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--webllm-border-strong);
  background: #dcefe4;
  color: var(--webllm-ink);
  font-size: 0.82rem;
  white-space: nowrap;
  cursor: pointer;
}

.webllm-chat__mode-toggle.is-off {
  background: #ece7dc;
  color: #6a5a43;
  text-decoration: line-through;
}

.webllm-chat__mode-toggle.is-on {
  background: #dcefe4;
  color: var(--webllm-ink);
  text-decoration: none;
}

.webllm-chat__mode-toggle:focus-visible {
  outline: 2px solid var(--webllm-accent);
  outline-offset: 2px;
}

.webllm-chat__mode-toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--webllm-ink);
  font-size: 1rem;
}

.webllm-chat__mode-toggle-label {
  font-weight: 600;
}

.webllm-chat__mode-toggle-icon.is-busy {
  animation: webllm-spin 0.9s linear infinite;
}

.webllm-chat__eyebrow {
  margin: 0 0 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  color: var(--webllm-muted);
}

.webllm-chat__title {
  margin: 0;
  color: var(--webllm-ink);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  cursor: help;
}

.webllm-chat__mode-indicator {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: #16311f;
  color: #f3fff7;
  font-size: 0.82rem;
  white-space: nowrap;
}

.webllm-chat__mode-indicator[data-mode="cached"] {
  background: #6e5310;
}

.webllm-chat__mode-indicator[data-mode="llm"] {
  background: #16311f;
}

.webllm-chat__prompt-surface {
  margin-top: 0.9rem;
}

.webllm-chat__details,
.webllm-chat__state-panel {
  margin-top: 0.55rem;
}

.webllm-chat__details summary,
.webllm-chat__state-panel summary {
  list-style: none;
  cursor: pointer;
  color: var(--webllm-ink);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.webllm-chat__details summary::-webkit-details-marker,
.webllm-chat__state-panel summary::-webkit-details-marker {
  display: none;
}

.webllm-chat__details summary::before,
.webllm-chat__state-panel-summary::before {
  content: "▸";
  margin-right: 0.35rem;
  font-size: 0.8rem;
  line-height: 1;
}

.webllm-chat__details[open] summary::before,
.webllm-chat__state-panel[open] .webllm-chat__state-panel-summary::before {
  content: "▾";
}

.webllm-chat__state-panel {
  border-radius: 0.95rem;
  border: 1px solid var(--webllm-border);
  background: rgba(255, 255, 255, 0.75);
  padding: 0.2rem 0.9rem 0.9rem;
}

.webllm-chat__state-panel-summary {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0;
}

.webllm-chat__state-panel-body {
  margin-top: 0.35rem;
}

.webllm-chat__state-content {
  margin-top: 0.6rem;
  padding: 0.8rem 0.9rem;
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--webllm-border);
  white-space: pre-wrap;
}

.webllm-chat__state-content code {
  white-space: pre-wrap;
}

.webllm-chat__support,
.webllm-chat__status {
  margin-top: 0.8rem;
  padding: 0.7rem 0.85rem;
  border-radius: 0.8rem;
  background: var(--webllm-surface);
  border: 1px solid var(--webllm-border);
  color: var(--webllm-muted);
}

.webllm-chat__support.is-warning {
  border-color: #d6bf6e;
  background: #fff8df;
  color: var(--webllm-warning);
}

.webllm-chat__messages {
  margin-top: 0.85rem;
  padding: 0.9rem;
  max-height: 28rem;
  overflow: auto;
  border-radius: 0.9rem;
  border: 1px solid var(--webllm-border);
  background: rgba(255, 255, 255, 0.92);
}

.webllm-message {
  margin: 0 0 0.8rem;
}

.webllm-message:last-child {
  margin-bottom: 0;
}

.webllm-message__label {
  font-size: 0.83rem;
  color: var(--webllm-muted);
  margin-bottom: 0.22rem;
}

.webllm-message__bubble {
  display: inline-block;
  max-width: min(92%, 48rem);
  padding: 0.75rem 0.9rem;
  border-radius: 0.8rem;
  white-space: pre-wrap;
  line-height: 1.45;
}

.webllm-message--user {
  text-align: right;
}

.webllm-message--user .webllm-message__label {
  text-align: right;
}

.webllm-message--user .webllm-message__bubble {
  background: #dcefe4;
  color: #1f3427;
}

.webllm-message--assistant .webllm-message__bubble {
  background: #f4f7f5;
  color: #1f2a24;
}

.webllm-chat__controls {
  margin-top: 0.85rem;
}

.webllm-chat__label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--webllm-ink);
}

.webllm-chat__input {
  width: 100%;
  min-height: 6rem;
  resize: vertical;
  border-radius: 0.75rem;
  border: 1px solid var(--webllm-border-strong);
  background: rgba(255, 255, 255, 0.95);
  padding: 0.75rem 0.9rem;
  color: var(--webllm-ink);
}

.webllm-chat__actions {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  margin-top: 0.7rem;
}

.webllm-chat__actions button,
.webllm-chat__actions .button {
  border: 1px solid var(--webllm-border-strong);
  border-radius: 0.7rem;
  padding: 0.55rem 0.85rem;
  background: #ffffff;
  color: var(--webllm-ink);
}

.webllm-chat__actions .webllm-chat__primary {
  --webllm-load-progress: 0%;
  background: linear-gradient(90deg, var(--webllm-accent) 0 var(--webllm-load-progress), #ffffff var(--webllm-load-progress) 100%);
  border-color: var(--webllm-accent);
  color: var(--webllm-accent-ink);
}

.webllm-chat__actions .webllm-chat__primary.is-loading {
  background: linear-gradient(90deg, var(--webllm-accent) 0 var(--webllm-load-progress), #ffffff var(--webllm-load-progress) 100%);
  color: var(--webllm-ink);
}

.webllm-chat__actions .webllm-chat__primary:not(.is-loading) {
  background: var(--webllm-accent);
}

.webllm-chat__actions button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.webllm-chat__details {
  margin-top: 0.85rem;
  padding: 0.2rem 0;
}

.webllm-chat__details summary {
  cursor: pointer;
  color: var(--webllm-ink);
}

.webllm-chat__details-content {
  margin-top: 0.6rem;
  padding: 0.8rem 0.9rem;
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--webllm-border);
  white-space: pre-wrap;
}

.webllm-chat__details-content code {
  white-space: pre-wrap;
}

@keyframes webllm-spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.webllm-chat__reference {
  margin-top: 0.85rem;
}

.webllm-chat__reference-title {
  margin: 0 0 0.35rem;
  color: var(--webllm-ink);
}

.webllm-chat__reference-body {
  padding: 0.8rem 0.9rem;
  border-radius: 0.75rem;
  background: #f7f8ef;
  border: 1px solid #d9dfb1;
  color: #41503b;
  white-space: pre-wrap;
}