.page-start {
  --max: 760px;
}

.page-start .intro {
  padding-bottom: var(--space-md);
}

.page-start .intro .copy-statement {
  max-width: 16ch;
}

.page-start .intro .copy-note {
  max-width: 56ch;
}

.page-start .intro .copy-note a {
  border-bottom: 1px solid var(--ink);
}

.start-stage {
  padding-bottom: var(--space-lg);
}

.start-form {
  display: grid;
  gap: var(--space-sm);
}

.start-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.start-field {
  display: grid;
  gap: 0.5rem;
}

.start-field label {
  font-family: "IBM Plex Mono", monospace;
  font-size: var(--type-kicker);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.start-optional {
  text-transform: none;
  letter-spacing: 0;
  color: var(--faint);
}

.start-field input,
.start-field select,
.start-field textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  resize: vertical;
}

.start-field input:focus-visible,
.start-field select:focus-visible,
.start-field textarea:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 2px;
}

.start-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-xs);
}

.start-btn {
  appearance: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  font-family: "IBM Plex Mono", monospace;
  font-size: var(--type-kicker);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}

.start-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.start-error {
  color: #b42318;
  font-size: var(--type-note);
}

:root[data-theme="dark"] .start-error {
  color: #f97066;
}

/* Conversation thread */
.start-thread__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.start-thread__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.start-link {
  appearance: none;
  border: 0;
  background: none;
  padding: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: var(--type-kicker);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.start-link:hover {
  color: var(--ink);
}

.start-ref {
  color: var(--muted);
  margin-top: 0.35rem;
}

.start-status {
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  white-space: nowrap;
}

.start-messages {
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
}

.start-msg {
  display: grid;
  gap: 0.35rem;
  max-width: 90%;
}

.start-msg__who {
  font-family: "IBM Plex Mono", monospace;
  font-size: var(--type-kicker);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.start-msg__body {
  padding: 0.875rem 1.1rem;
  border-radius: 1rem;
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: var(--type-note);
  white-space: pre-wrap;
  line-height: 1.55;
}

.start-msg--client {
  margin-left: auto;
  text-align: right;
}

.start-msg--client .start-msg__body {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.start-msg--ai .start-msg__body {
  background: var(--surface);
}

.start-missing {
  margin: 0.15rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: var(--type-note);
  line-height: 1.45;
}

.start-reply {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  margin-top: var(--space-xs);
}

.start-reply textarea {
  flex: 1;
  padding: 0.875rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  resize: vertical;
}

.start-reply textarea:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 2px;
}

.start-note {
  margin-top: var(--space-sm);
  color: var(--muted);
}

.start-note a {
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
}

.start-hidden {
  display: none !important;
}

@media (max-width: 600px) {
  .start-grid {
    grid-template-columns: 1fr;
  }
}