.chat-demo {
  display: grid;
  gap: 24px;
}

.chat-demo .section-header {
  margin-bottom: 0;
}

.chat-demo .section-header h2 {
  max-width: 820px;
}

.chat-demo-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1.05fr);
  gap: 22px;
  align-items: stretch;
}

.setup-panel,
.chat-window {
  min-width: 0;
}

.setup-panel {
  display: grid;
  align-content: start;
  gap: 22px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
}

.panel-heading {
  display: grid;
  gap: 7px;
}

.panel-heading h3,
.panel-heading p,
.setup-fields > p {
  margin: 0;
}

.panel-heading > p:last-child {
  max-width: 48rem;
  color: var(--muted);
}

.step-label,
.chat-kicker {
  color: #0f6953;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-transform: uppercase;
}

.setup-fields {
  display: grid;
  gap: 18px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.preset-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.preset-list .preset-button:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.preset-button,
.suggestion-button {
  min-height: 48px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--ink);
  font: inherit;
  font-weight: 850;
  cursor: pointer;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.preset-button {
  position: relative;
  display: grid;
  gap: 3px;
  min-height: 78px;
  padding: 14px 40px 14px 14px;
  text-align: left;
}

.preset-button::after {
  position: absolute;
  top: 16px;
  right: 14px;
  width: 14px;
  height: 14px;
  border: 2px solid #b7c8dc;
  border-radius: 999px;
  background: #ffffff;
  box-shadow: inset 0 0 0 3px #ffffff;
  content: "";
}

.preset-title {
  display: block;
  line-height: 1.2;
}

.preset-note {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.35;
}

.suggestion-button {
  padding: 10px 14px;
  text-align: left;
}

.preset-button:hover,
.preset-button.is-selected,
.preset-button:focus-visible,
.suggestion-button:hover,
.suggestion-button:focus-visible {
  border-color: var(--blue);
  background: #edf4ff;
  color: #174dcc;
  box-shadow: 0 8px 18px rgba(36, 107, 253, 0.12);
}

.preset-button.is-selected::after {
  border-color: #174dcc;
  background: #174dcc;
}

.preset-button:hover .preset-note,
.preset-button.is-selected .preset-note,
.preset-button:focus-visible .preset-note {
  color: #285aa6;
}

.chat-field {
  display: grid;
  gap: 7px;
}

.chat-field + .chat-field {
  margin-top: 0;
}

.chat-field label,
.chat-label {
  margin: 0;
  font-weight: 900;
  line-height: 1.25;
}

.field-help {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.45;
}

.chat-field input,
.chat-field textarea,
.chat-input-row textarea {
  width: 100%;
  border: 2px solid #cbd8e7;
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--ink);
  font: inherit;
  line-height: 1.45;
  padding: 12px 14px;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    background-color 160ms ease;
}

.chat-field textarea,
.chat-input-row textarea {
  resize: vertical;
}

.chat-field input:focus-visible,
.chat-field textarea:focus-visible,
.chat-input-row textarea:focus-visible {
  outline: none;
  border-color: var(--blue);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(36, 107, 253, 0.16);
}

.char-count {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 750;
}

.char-count.is-low {
  color: var(--danger);
}

.chat-window {
  display: grid;
  gap: 16px;
  min-width: 0;
  border: 1px solid #cbd8e7;
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: 0 14px 34px rgba(23, 32, 51, 0.08);
  padding: 18px;
}

.chat-window-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-window-header > div:nth-child(2) {
  min-width: 0;
}

.byte-avatar,
.chat-avatar {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: var(--radius);
  background: var(--ink);
  color: #ffffff;
  font-weight: 900;
}

.byte-avatar {
  width: 52px;
  height: 52px;
}

.chat-avatar {
  width: 40px;
  height: 38px;
  font-size: 0.78rem;
}

.chat-window-header h3,
.chat-window-header p {
  margin: 0;
}

.chat-window-header p {
  color: var(--muted);
}

.chat-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  margin-left: auto;
  padding: 6px 10px;
  border-radius: 999px;
  background: #eef8f5;
  color: #0f6953;
  font-size: 0.84rem;
  font-weight: 900;
  white-space: nowrap;
}

.chat-log {
  display: grid;
  gap: 12px;
  min-height: 286px;
  max-height: 430px;
  overflow-y: auto;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f7fbff;
  overscroll-behavior: contain;
}

.chat-message {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  max-width: 92%;
}

.chat-message.user {
  flex-direction: row-reverse;
  justify-self: end;
}

.chat-message.bot {
  justify-self: start;
}

.chat-message.user .chat-bubble {
  background: #edf4ff;
  border-color: #bfd1e7;
}

.chat-message.user .chat-avatar {
  background: var(--blue);
}

.chat-bubble {
  max-width: min(100%, 520px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  padding: 11px 13px;
  box-shadow: 0 4px 12px rgba(23, 32, 51, 0.05);
}

.chat-speaker {
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 900;
}

.chat-text {
  margin: 0;
  line-height: 1.52;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.typing-indicator {
  width: fit-content;
  min-height: 32px;
  margin: 0;
  padding: 5px 10px;
  border-radius: 999px;
  background: #f1f5f9;
  color: var(--muted);
  font-weight: 800;
}

.chat-input-row {
  display: grid;
  gap: 8px;
}

.chat-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.chat-actions .button:disabled {
  opacity: 0.58;
  cursor: not-allowed;
  box-shadow: none;
}

.chat-error {
  margin: 0;
  color: var(--danger);
  font-weight: 850;
}

.chat-error:empty {
  min-height: 0;
}

.chat-error:not(:empty) {
  min-height: 44px;
  padding: 9px 12px;
  border: 1px solid #ffc8c3;
  border-radius: var(--radius);
  background: #fff2f1;
}

.suggestion-panel {
  display: grid;
  gap: 10px;
}

.suggestion-list,
.promo-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.privacy-note,
.demo-disclaimer {
  border-left: 6px solid var(--coral);
  border-radius: var(--radius);
  background: #fff6f5;
  padding: 15px 17px;
}

.privacy-note p,
.demo-disclaimer p {
  margin: 0;
}

.privacy-note p + p,
.demo-disclaimer p + p {
  margin-top: 8px;
}

.demo-helper {
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

.demo-helper p {
  margin: 0;
}

.learning-strip {
  display: grid;
  gap: 18px;
  padding: 30px 0;
  border-top: 1px solid #b8e8d8;
  border-bottom: 1px solid #b8e8d8;
}

.learning-strip h2 {
  margin-bottom: 0;
}

@media (prefers-reduced-motion: reduce) {
  .preset-button,
  .suggestion-button,
  .chat-field input,
  .chat-field textarea,
  .chat-input-row textarea {
    transition: none;
  }

  .chat-log {
    scroll-behavior: auto;
  }
}

@media (max-width: 900px) {
  .chat-demo-grid {
    grid-template-columns: 1fr;
  }

  .chat-log {
    max-height: 390px;
  }
}

@media (max-width: 640px) {
  .preset-list {
    grid-template-columns: 1fr;
  }

  .preset-button,
  .suggestion-button,
  .chat-actions .button {
    width: 100%;
  }

  .chat-window-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .chat-status {
    margin-left: 0;
  }

  .chat-log {
    min-height: 310px;
    padding: 12px;
  }

  .chat-message {
    max-width: 100%;
  }

  .chat-bubble {
    max-width: 100%;
  }

  .promo-cta .button {
    width: 100%;
  }
}