/* Demo page — scripted chat + SoR */
.demo-shell {
  max-width: 72rem;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.75rem) var(--pad-x, 1.25rem) 3.5rem;
  font-family: var(--font-sans);
}

.demo-intro h1 {
  margin: 0 0 0.65rem;
  max-width: 22ch;
  font-size: clamp(1.55rem, 3.2vw, 2.15rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--ink);
}

.demo-lead {
  margin: 0;
  max-width: 40rem;
  color: var(--ink-muted);
  font-size: 1.05rem;
  line-height: 1.55;
}

.demo-badge {
  display: inline-block;
  margin: 1rem 0 0;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.demo-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem 1.25rem;
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.demo-scenarios {
  display: grid;
  grid-template-columns: repeat(5, auto);
  gap: 0.4rem;
  width: max-content;
  max-width: 100%;
}

.demo-sc {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0.42rem 0.7rem 0.42rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-muted);
  cursor: pointer;
  text-align: left;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  transition:
    color 0.16s ease,
    border-color 0.16s ease,
    background 0.16s ease,
    box-shadow 0.16s ease,
    transform 0.12s ease;
}

.demo-sc-n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--ink) 6%, var(--bg));
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink-muted);
  line-height: 1;
}

.demo-sc-label {
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.demo-sc:hover,
.demo-sc:focus-visible {
  border-color: color-mix(in srgb, var(--brand) 40%, var(--line));
  color: var(--ink);
  outline: none;
}

.demo-sc:hover .demo-sc-n,
.demo-sc:focus-visible .demo-sc-n {
  color: var(--brand);
  background: color-mix(in srgb, var(--brand) 10%, var(--bg));
}

.demo-sc:active:not(:disabled) {
  transform: translateY(1px);
}

.demo-sc.is-on {
  border-color: var(--brand);
  color: #fff;
  background: var(--brand);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--brand-press) 55%, transparent);
}

.demo-sc.is-on .demo-sc-n {
  color: #fff;
  background: color-mix(in srgb, #fff 18%, transparent);
}

.demo-sc.is-on:hover,
.demo-sc.is-on:focus-visible {
  border-color: var(--brand-press);
  color: #fff;
  background: var(--brand-press);
}

.demo-sc.is-ai {
  --ai-accent: var(--ok);
  border-color: color-mix(in srgb, var(--ai-accent) 38%, var(--line));
  color: var(--ai-accent);
  background: color-mix(in srgb, var(--ai-accent) 6%, var(--bg-elev));
  font-weight: 600;
}

.demo-sc.is-ai .demo-sc-n {
  color: var(--ai-accent);
  background: color-mix(in srgb, var(--ai-accent) 12%, var(--bg));
}

.demo-sc.is-ai:hover,
.demo-sc.is-ai:focus-visible {
  border-color: color-mix(in srgb, var(--ai-accent) 65%, var(--line));
  color: var(--ai-accent);
  background: color-mix(in srgb, var(--ai-accent) 9%, var(--bg-elev));
}

.demo-sc.is-ai.is-on {
  border-color: var(--ai-accent);
  color: #fff;
  background: var(--ai-accent);
  box-shadow: 0 1px 0 color-mix(in srgb, #0f5a36 50%, transparent);
}

.demo-sc.is-ai.is-on .demo-sc-n {
  color: #fff;
  background: color-mix(in srgb, #fff 18%, transparent);
}

.demo-sc.is-ai.is-on:hover,
.demo-sc.is-ai.is-on:focus-visible {
  border-color: #166b42;
  color: #fff;
  background: #166b42;
}

.demo-sc.is-warn.is-on {
  border-color: var(--signal);
  color: #fff;
  background: var(--signal);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--signal-press) 55%, transparent);
}

.demo-sc.is-warn.is-on .demo-sc-n {
  color: #fff;
  background: color-mix(in srgb, #fff 18%, transparent);
}

.demo-sc.is-warn.is-on:hover,
.demo-sc.is-warn.is-on:focus-visible {
  border-color: var(--signal-press);
  color: #fff;
  background: var(--signal-press);
}

.demo-sc:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.demo-playback {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.demo-caption {
  margin: 0.85rem 0 0;
  max-width: 44rem;
  color: var(--ink-muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.demo-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 0;
  margin-top: 1.35rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-elev);
  min-height: 28rem;
  overflow: hidden;
  box-shadow: 0 10px 28px color-mix(in srgb, #0a1628 6%, transparent);
}

.demo-pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

/* ── Chat: messenger ── */
.demo-chat {
  border-right: 1px solid var(--line);
  background:
    radial-gradient(
      ellipse at 20% 0%,
      color-mix(in srgb, var(--brand) 6%, transparent),
      transparent 55%
    ),
    #e8edf2;
}

.demo-pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, #c5ccd6);
  background: color-mix(in srgb, var(--bg-elev) 92%, #e8edf2);
}

.demo-chat-head {
  justify-content: flex-start;
  gap: 0.7rem;
}

.demo-chat-avatar {
  flex: 0 0 auto;
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--brand), #1a5a9e);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  display: grid;
  place-items: center;
}

.demo-chat-who {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
  min-width: 0;
}

.demo-pane-head h2 {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.demo-pane-meta {
  font-size: 0.72rem;
  letter-spacing: 0;
  text-transform: none;
  font-family: var(--font-sans);
  color: var(--ink-muted);
}

.demo-sor-head .demo-pane-meta {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: color-mix(in srgb, #e8edf2 55%, transparent);
}

.demo-chat-log {
  flex: 1 1 auto;
  overflow: auto;
  padding: 0.9rem 0.85rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-height: 18rem;
  max-height: min(62vh, 36rem);
}

.demo-msg {
  max-width: 82%;
  padding: 0.55rem 0.75rem 0.5rem;
  border-radius: 14px;
  border: none;
  background: #fff;
  box-shadow: 0 1px 2px color-mix(in srgb, #0a1628 8%, transparent);
}

.demo-msg--owner {
  align-self: flex-end;
  border-radius: 14px 4px 14px 14px;
  background: color-mix(in srgb, var(--brand) 12%, #fff);
  box-shadow: 0 1px 2px color-mix(in srgb, var(--brand) 12%, transparent);
}

.demo-msg--agent {
  align-self: flex-start;
  border-radius: 4px 14px 14px 14px;
}

.demo-msg--agent.is-wrong {
  background: color-mix(in srgb, var(--signal) 10%, #fff);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--signal) 28%, transparent);
}

.demo-msg--system.is-warn .demo-msg-text {
  color: var(--signal);
}

.demo-msg--system {
  align-self: center;
  max-width: 94%;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg-elev) 70%, transparent);
  box-shadow: none;
  text-align: center;
}

.demo-msg-who {
  display: none;
}

.demo-msg p,
.demo-msg-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--ink);
  text-wrap: pretty;
  min-height: 1.35em;
}

.demo-msg--system p,
.demo-msg--system .demo-msg-text {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--ink-muted);
}

.demo-msg--system.is-work {
  padding: 0.35rem 0.7rem;
  background: color-mix(in srgb, var(--brand) 8%, var(--bg-elev));
}

.demo-msg--system.is-work .demo-msg-text {
  font-size: 0.72rem;
  color: var(--brand);
  font-family: var(--font-mono);
}

.demo-msg.has-plan {
  max-width: 100%;
  align-self: stretch;
  border-radius: 10px;
}

.demo-plan {
  margin: 0.55rem 0 0;
  padding: 0 0 0 1.25rem;
  list-style: decimal;
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
}

.demo-plan li {
  font-size: 0.84rem;
  line-height: 1.35;
  color: var(--ink);
  padding-left: 0.15rem;
}

.demo-plan li.is-in {
  animation: demo-plan-in 0.45s var(--ease, ease) both;
}

@keyframes demo-plan-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.demo-msg.is-typing .demo-msg-text::after {
  content: "▋";
  margin-left: 0.05em;
  color: var(--brand);
  animation: demo-caret 0.7s steps(1) infinite;
}

@keyframes demo-caret {
  50% {
    opacity: 0;
  }
}

.demo-chip {
  align-self: center;
  margin: 0.1rem 0;
  padding: 0.28rem 0.65rem;
  border: none;
  border-radius: 999px;
  background: color-mix(in srgb, var(--brand) 10%, var(--bg-elev));
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--brand);
}

.demo-chip.is-warn {
  background: color-mix(in srgb, var(--signal) 12%, var(--bg-elev));
  color: var(--signal);
}

.demo-chat-foot {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.7rem 0.7rem;
  border-top: 1px solid color-mix(in srgb, var(--line) 70%, #c5ccd6);
  background: color-mix(in srgb, var(--bg-elev) 88%, #e8edf2);
}

.demo-chat-foot[hidden] {
  display: none !important;
}

.demo-fake-input {
  flex: 1;
  display: block;
  padding: 0.55rem 0.85rem;
  border: none;
  border-radius: 999px;
  background: #fff;
  color: var(--ink-muted);
  font-size: 0.88rem;
  box-shadow: inset 0 0 0 1px var(--line);
  opacity: 1;
}

.demo-fake-send {
  flex: 0 0 auto;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 0.95rem;
  display: grid;
  place-items: center;
  opacity: 0.85;
}

/* ── SoR: underhood ── */
.demo-sor {
  background: #0a1628;
  color: #e8edf2;
}

.demo-sor-head {
  background: #0a1628;
  border-bottom: 1px solid color-mix(in srgb, #e8edf2 12%, transparent);
}

.demo-sor-head h2 {
  color: #fff;
  font-size: 0.92rem;
}

.demo-sor-body {
  flex: 1 1 auto;
  overflow: auto;
  padding: 0.75rem 0.85rem 1rem;
  max-height: min(62vh, 36rem);
}

.demo-sor-block + .demo-sor-block {
  margin-top: 1rem;
}

.demo-sor-block h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: color-mix(in srgb, #e8edf2 68%, transparent);
}

.demo-sor-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.demo-sor-empty {
  padding: 0.55rem 0.65rem;
  border-radius: 4px;
  border: 1px dashed color-mix(in srgb, #e8edf2 14%, transparent);
  color: color-mix(in srgb, #e8edf2 45%, transparent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.demo-sor.is-offline {
  background: color-mix(in srgb, var(--signal) 12%, #0a1628);
}

.demo-sor.is-offline .demo-pane-meta {
  color: #ff9b6a;
}

.demo-sor.is-offline .demo-sor-empty {
  color: color-mix(in srgb, #ff9b6a 70%, #e8edf2);
  border-color: color-mix(in srgb, #ff9b6a 35%, transparent);
}

.demo-chat.is-auto .demo-chat-foot {
  display: none;
}

.demo-chat.is-auto .demo-pane-meta {
  color: var(--ok);
}

.demo-sor.is-auto .demo-pane-meta {
  color: #3dd68c;
}

.demo-sor.is-auto .demo-sor-item.is-flash {
  border-color: color-mix(in srgb, #3dd68c 45%, transparent);
  background: color-mix(in srgb, #3dd68c 10%, transparent);
}

.demo-sor-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid color-mix(in srgb, #e8edf2 10%, transparent);
  border-radius: 4px;
  border-left: 1px solid color-mix(in srgb, #e8edf2 10%, transparent);
  background: color-mix(in srgb, #fff 4%, transparent);
  font-family: var(--font-mono);
  transition: background 0.35s ease, border-color 0.35s ease;
}

.demo-sor-item.is-flash {
  border-color: color-mix(in srgb, #3dd68c 45%, transparent);
  background: color-mix(in srgb, #3dd68c 8%, transparent);
  animation: demo-op-pulse 1.6s ease 2;
}

@keyframes demo-op-pulse {
  50% {
    background: color-mix(in srgb, #3dd68c 14%, transparent);
  }
}

.demo-sor-item.is-pending {
  border-color: color-mix(in srgb, #ff9b6a 40%, transparent);
  background: color-mix(in srgb, #ff9b6a 8%, transparent);
}

.demo-sor-op {
  font-size: 0.68rem;
  line-height: 1.35;
}

.demo-sor-verb {
  color: #7eb6ff;
  font-weight: 600;
}

.demo-sor-item:not(.is-flash):not(.is-pending) .demo-sor-verb {
  color: color-mix(in srgb, #7eb6ff 65%, #e8edf2);
}

.demo-sor-tbl {
  color: #ffc27a;
}

.demo-sor-name {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: #fff;
  font-family: var(--font-sans);
}

.demo-sor-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: color-mix(in srgb, #e8edf2 62%, transparent);
  line-height: 1.35;
}

.demo-sor-item.is-flash .demo-sor-meta {
  color: #3dd68c;
}

.demo-sor-item.is-pending .demo-sor-meta {
  color: #ff9b6a;
}

.demo-sor-item.is-pending .demo-sor-verb {
  color: #ff9b6a;
}

.demo-cta {
  margin-top: 2.25rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
}

.demo-cta p {
  margin: 0 0 1.15rem;
  max-width: 38rem;
  color: var(--ink-muted);
  font-size: 1.02rem;
  line-height: 1.55;
  text-wrap: pretty;
}

.demo-cta .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* Light surfaces: global .btn-ghost is for dark hero/close */
.demo-page .btn-ghost {
  background: var(--bg-elev);
  color: var(--ink);
  border-color: var(--line);
}

.demo-page .btn-ghost:hover,
.demo-page .btn-ghost:focus-visible {
  border-color: var(--brand);
  color: var(--brand);
  background: color-mix(in srgb, var(--brand) 5%, var(--bg-elev));
  outline: none;
}

.demo-page .btn-ghost:disabled {
  color: var(--ink-muted);
  border-color: var(--line);
  background: transparent;
  opacity: 0.55;
}

@media (max-width: 1200px) {
  .demo-scenarios {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
  }

  .demo-sc {
    width: 100%;
  }
}

@media (max-width: 1100px) {
  .demo-scenarios {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .demo-sc {
    width: 100%;
  }
}

@media (max-width: 900px) {
  .demo-stage {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .demo-chat {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .demo-chat-log,
  .demo-sor-body {
    max-height: 28rem;
  }
}

@media (max-width: 720px) {
  .demo-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  /* Horizontal snap track — scenarios stay in first viewport */
  .demo-scenarios {
    display: flex;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 0.28rem;
    width: 100%;
    max-width: 100%;
    padding: 0.28rem;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 0.85rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: color-mix(in srgb, var(--bg) 88%, var(--line));
    box-shadow: inset 0 1px 0 color-mix(in srgb, #fff 75%, transparent);
  }

  .demo-scenarios::-webkit-scrollbar {
    display: none;
  }

  .demo-sc {
    flex: 0 0 auto;
    width: auto;
    min-width: max-content;
    min-height: 2.75rem;
    padding: 0.5rem 0.8rem 0.5rem 0.48rem;
    font-size: 0.875rem;
    line-height: 1.2;
    scroll-snap-align: center;
    border-color: transparent;
    background: transparent;
    box-shadow: none;
  }

  .demo-sc:hover,
  .demo-sc:focus-visible {
    border-color: transparent;
    background: color-mix(in srgb, #fff 70%, transparent);
    color: var(--ink);
  }

  .demo-sc-n {
    width: 1.45rem;
    height: 1.45rem;
    font-size: 0.74rem;
    background: color-mix(in srgb, #fff 55%, var(--bg));
  }

  .demo-sc.is-ai {
    border-color: transparent;
    background: transparent;
  }

  .demo-sc.is-ai:hover,
  .demo-sc.is-ai:focus-visible {
    border-color: transparent;
    background: color-mix(in srgb, var(--ok) 8%, #fff);
  }

  .demo-sc.is-on,
  .demo-sc.is-ai.is-on,
  .demo-sc.is-warn.is-on {
    border-color: transparent;
    box-shadow: 0 1px 3px color-mix(in srgb, #0a1628 14%, transparent);
  }

  .demo-sc.is-on {
    background: var(--brand);
  }

  .demo-sc.is-ai.is-on {
    background: var(--ok);
  }

  .demo-sc.is-warn.is-on {
    background: var(--signal);
  }

  .demo-playback {
    width: 100%;
    display: grid;
    grid-template-columns: 1.35fr 1fr;
    gap: 0.45rem;
  }

  .demo-playback .btn {
    width: 100%;
    min-height: 2.85rem;
    justify-content: center;
    font-size: 0.95rem;
  }

  .demo-caption {
    margin-top: 0.65rem;
    font-size: 0.86rem;
  }

  .demo-cta .btn-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .demo-cta .btn-row .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 420px) {
  .demo-sc {
    min-height: 2.7rem;
    padding: 0.5rem 0.75rem 0.5rem 0.48rem;
    font-size: 0.84rem;
    gap: 0.38rem;
  }

  .demo-sc-label {
    max-width: 11.5ch;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

@media (prefers-reduced-motion: reduce) {
  .demo-sor-item {
    transition: none;
    animation: none;
  }

  .demo-sc,
  .demo-sc:active:not(:disabled) {
    transition: none;
    transform: none;
  }

  .demo-sc {
    transition: none;
  }

  .demo-plan li.is-in {
    animation: none;
  }

  .demo-msg.is-typing .demo-msg-text::after {
    animation: none;
  }
}