:root {
  --canvas: #fafafa;
  --surface: #ffffff;
  --tag: #eff0f1;
  --divider: #e3e5e8;
  --mention: #505962;
  --ink: #1f2428;
  --action: #0064e0;
  --action-hover: #0052b8;
  --openai: #10a37f;
  --gemini: #6b7cff;
  --claude: #d97757;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---- nav ---- */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px clamp(20px, 5vw, 56px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand svg {
  width: 30px;
  height: 30px;
}

.cta {
  display: inline-block;
  background: var(--action);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 10px 22px;
  border-radius: 999px;
  transition: background 0.15s ease;
}

.cta:hover {
  background: var(--action-hover);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.gh-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--divider);
  border-radius: 50%;
  background: var(--surface);
  color: var(--mention);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.gh-link:hover {
  color: var(--ink);
  border-color: var(--mention);
}

.gh-link svg {
  width: 18px;
  height: 18px;
}

.foot-links {
  display: inline-flex;
  align-items: center;
  gap: 16px;
}

/* ---- stage ---- */
.stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px clamp(16px, 4vw, 48px) 24px;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
}

.pitch {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: rise 0.45s ease both;
}

.pitch[hidden] {
  display: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.pitch h1 {
  font-size: clamp(2.4rem, 5.6vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 800;
  text-align: center;
  margin: 12px 0 28px;
  max-width: 20ch;
  text-wrap: balance;
}

.demo-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--divider);
  border-radius: 20px;
  padding: clamp(14px, 2.5vw, 28px);
  box-shadow: 0 12px 40px rgba(31, 36, 40, 0.07);
}

.demo-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--mention);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.replay {
  border: 1px solid var(--divider);
  background: var(--canvas);
  color: var(--mention);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.replay:hover {
  color: var(--ink);
  border-color: var(--mention);
}

.sample-note {
  margin: 10px 2px 0;
  color: var(--mention);
  opacity: 0.75;
  font-size: 0.75rem;
}

/* ---- chart ---- */
#chats-chart {
  width: 100%;
  max-width: 640px;
  height: auto;
  display: block;
  margin: 0 auto;
}

#chats-chart text {
  font-family: inherit;
  fill: var(--mention);
}

#chats-chart .grid-line {
  stroke: var(--divider);
  stroke-width: 1;
}

#chats-chart .axis-line {
  stroke: var(--mention);
  stroke-width: 1.5;
  opacity: 0.5;
}

#chats-chart .bar {
  transition: y 0.55s cubic-bezier(0.22, 0.9, 0.3, 1),
    height 0.55s cubic-bezier(0.22, 0.9, 0.3, 1), opacity 0.3s ease;
}

#chats-chart .fadeable {
  transition: opacity 0.45s ease;
}

#chats-chart .leader {
  transition: opacity 0.4s ease;
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
}

#chats-chart .leader.drawn {
  transition: stroke-dashoffset 0.6s ease-out, opacity 0.3s ease;
  stroke-dashoffset: 0;
}

#chats-chart .leader-dot {
  transition: opacity 0.25s ease;
}

#chats-chart .today-ring {
  fill: none;
  stroke: var(--action);
  stroke-width: 2;
  stroke-dasharray: 5 4;
  opacity: 0;
  transition: opacity 0.4s ease;
}

/* ---- tags demo ---- */
.tags-demo {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 6px 2px;
  min-height: 300px;
}

.tag-row {
  background: var(--canvas);
  border: 1px solid var(--divider);
  border-radius: 14px;
  padding: 14px 16px;
  transform: translateX(-24px);
  opacity: 0;
  transition: transform 0.45s cubic-bezier(0.22, 0.9, 0.3, 1),
    opacity 0.35s ease;
}

.tag-row.in {
  transform: translateX(0);
  opacity: 1;
}

.tag-row .chat-line {
  font-size: 0.92rem;
  color: var(--ink);
  margin-bottom: 10px;
}

.tag-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--action);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 4px 12px;
  transform: scale(0.4);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.3, 1.4, 0.5, 1),
    opacity 0.2s ease;
}

.tag-pill.in {
  transform: scale(1);
  opacity: 1;
}

.tag-count {
  margin-top: 4px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--mention);
  font-variant-numeric: tabular-nums;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.tag-count.in {
  opacity: 1;
}

/* ---- voice demo ---- */
.voice-demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 18px 8px 10px;
  min-height: 300px;
}

.mic-wrap {
  position: relative;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mic-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--action);
  opacity: 0;
  transform: scale(0.55);
}

.mic-wrap.live .mic-ring {
  animation: ring 2.2s ease-out infinite;
}

.mic-wrap.live .mic-ring:nth-child(2) {
  animation-delay: 0.7s;
}

.mic-wrap.live .mic-ring:nth-child(3) {
  animation-delay: 1.4s;
}

@keyframes ring {
  0% {
    opacity: 0.7;
    transform: scale(0.55);
  }
  100% {
    opacity: 0;
    transform: scale(1.15);
  }
}

.mic-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: none;
  background: var(--action);
  color: #fff;
  cursor: default;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 100, 224, 0.35);
}

.mic-btn svg {
  width: 30px;
  height: 30px;
}

.wave {
  display: flex;
  align-items: center;
  gap: 5px;
  height: 44px;
}

.wave span {
  width: 5px;
  border-radius: 3px;
  background: var(--action);
  height: 8px;
  opacity: 0.35;
}

.wave.live span {
  opacity: 1;
  animation: wavebar 0.9s ease-in-out infinite alternate;
}

@keyframes wavebar {
  from {
    transform: scaleY(0.35);
  }
  to {
    transform: scaleY(1);
  }
}

.voice-script {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 96px;
}

.voice-q,
.voice-a {
  border-radius: 14px;
  padding: 12px 16px;
  font-size: 0.92rem;
  line-height: 1.45;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.voice-q.in,
.voice-a.in {
  opacity: 1;
  transform: translateY(0);
}

.voice-q {
  background: var(--tag);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  max-width: 85%;
}

.voice-a {
  background: var(--surface);
  border: 1px solid var(--divider);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
  max-width: 90%;
}

.voice-q .caret::after {
  content: "▍";
  color: var(--action);
  animation: blink 0.7s steps(1) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* ---- activity demo ---- */
.activity-demo {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 10px 2px 4px;
  min-height: 300px;
}

.activity-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.activity-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.activity-modes {
  display: flex;
  gap: 2px;
  background: var(--tag);
  border-radius: 999px;
  padding: 3px;
}

.activity-mode {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--mention);
  padding: 6px 16px;
  border-radius: 999px;
}

.activity-mode.on {
  background: var(--action);
  color: #fff;
}

.activity-bar {
  display: flex;
  gap: 3px;
}

.activity-seg {
  height: 14px;
  border-radius: 7px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.55s cubic-bezier(0.22, 0.9, 0.3, 1);
}

.activity-seg.in {
  transform: scaleX(1);
}

.activity-rows {
  display: flex;
  flex-direction: column;
}

.activity-row {
  display: grid;
  grid-template-columns: 1fr 76px 120px;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  opacity: 0;
  transform: translateX(-18px);
  transition: opacity 0.35s ease,
    transform 0.4s cubic-bezier(0.22, 0.9, 0.3, 1);
}

.activity-row.in {
  opacity: 1;
  transform: translateX(0);
}

.activity-left {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.activity-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex: none;
}

.activity-tag {
  background: var(--tag);
  color: var(--mention);
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: 8px;
  padding: 5px 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.activity-pct {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.activity-val {
  color: var(--mention);
  font-variant-numeric: tabular-nums;
  text-align: right;
  font-size: 0.9rem;
}

.flip-word {
  display: inline-block;
  color: var(--action);
}

.flip-word.flip {
  animation: flip-in 0.45s ease;
}

@keyframes flip-in {
  from {
    opacity: 0;
    transform: translateY(55%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- summary demo ---- */
.summary-demo {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 10px 2px 4px;
  min-height: 300px;
}

.sum-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.sum-head.in {
  opacity: 1;
  transform: translateY(0);
}

.sum-thread {
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sum-wrap {
  position: relative;
  flex: none;
}

.sum-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--action);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: default;
}

.sum-btn svg {
  width: 14px;
  height: 14px;
}

.sum-btn .chev {
  transition: transform 0.2s ease;
}

.sum-wrap:has(.sum-drop.open) .chev {
  transform: rotate(180deg);
}

.sum-drop {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 5;
  width: 300px;
  max-width: calc(100vw - 4rem);
  background: var(--surface);
  border: 1px solid var(--divider);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(31, 36, 40, 0.14);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.sum-drop.open {
  opacity: 1;
  transform: translateY(0);
}

.sum-tpl {
  border-radius: 8px;
  padding: 8px 10px;
}

.sum-tpl.active {
  background: var(--tag);
}

.sum-tpl-top {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sum-tpl-name {
  font-size: 0.82rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sum-badge {
  background: var(--tag);
  color: var(--mention);
  font-size: 0.65rem;
  font-weight: 500;
  border-radius: 6px;
  padding: 2px 6px;
  flex: none;
}

.sum-tpl.active .sum-badge {
  background: var(--surface);
}

.sum-desc {
  margin: 4px 0 0;
  font-size: 0.7rem;
  color: var(--mention);
  line-height: 1.4;
}

.sum-panel {
  background: var(--canvas);
  border: 1px solid var(--divider);
  border-radius: 14px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.sum-panel.in {
  opacity: 1;
  transform: translateY(0);
}

.sum-block {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.sum-block.in {
  opacity: 1;
  transform: translateY(0);
}

.sum-h {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--mention);
  margin-bottom: 4px;
}

.sum-p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.5;
}

.sum-ul,
.sum-check {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 0.85rem;
  line-height: 1.45;
}

.sum-ul li {
  padding-left: 14px;
  position: relative;
}

.sum-ul li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--mention);
}

.sum-check li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.sum-box {
  width: 12px;
  height: 12px;
  border: 1.5px solid var(--mention);
  border-radius: 3px;
  flex: none;
  margin-top: 4px;
}

.sum-caret::after {
  content: "▍";
  color: var(--action);
  animation: blink 0.7s steps(1) infinite;
}

.sum-actions {
  display: flex;
  gap: 8px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sum-actions.in {
  opacity: 1;
}

.sum-mini {
  border: 1px solid var(--divider);
  background: var(--surface);
  color: var(--mention);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 8px;
  padding: 5px 12px;
  cursor: default;
}

/* ---- setup page ---- */
.setup {
  flex: 1;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 8px clamp(16px, 4vw, 48px) 32px;
}

.setup h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1.08;
  font-weight: 800;
  margin: 12px 0 10px;
}

.setup .lede {
  font-size: 1.05rem;
  color: var(--mention);
  margin: 0 0 26px;
}

.setup h2 {
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  margin: 26px 0 10px;
}

.setup p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0 0 12px;
}

.setup code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--tag);
  border-radius: 6px;
  padding: 1px 6px;
}

.setup-note {
  color: var(--mention);
  font-size: 0.88rem;
}

.setup-note a {
  color: var(--action);
  text-decoration: none;
}

.setup-note a:hover {
  text-decoration: underline;
}

.setup-tabs {
  display: inline-flex;
  gap: 2px;
  background: var(--tag);
  border-radius: 999px;
  padding: 3px;
  margin-bottom: 14px;
}

.setup-tab {
  border: none;
  background: transparent;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--mention);
  padding: 7px 20px;
  border-radius: 999px;
  cursor: pointer;
}

.setup-tab.on {
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 1px 4px rgba(31, 36, 40, 0.14);
}

.codeblock {
  position: relative;
  background: var(--ink);
  border-radius: 12px;
  margin: 0 0 12px;
}

.codeblock pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
}

.codeblock code {
  background: none;
  padding: 0;
  color: #f2f4f6;
  font-size: 0.85rem;
  line-height: 1.7;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: transparent;
  color: #d6dbe0;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
}

.copy-btn:hover {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}

.gh-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 999px;
  margin: 6px 0 14px;
}

.gh-btn svg {
  width: 20px;
  height: 20px;
}

/* ---- pager ---- */
.pager {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 26px;
}

.page-arrow {
  border: 1px solid var(--divider);
  background: var(--surface);
  color: var(--mention);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-arrow:hover {
  color: var(--ink);
  border-color: var(--mention);
}

.dots {
  display: flex;
  gap: 10px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: var(--divider);
  cursor: pointer;
  padding: 0;
  transition: background 0.2s ease, transform 0.2s ease;
}

.dot[aria-current="true"] {
  background: var(--action);
  transform: scale(1.25);
}

/* ---- footer ---- */
.site-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 18px clamp(20px, 5vw, 56px) 26px;
  color: var(--mention);
  font-size: 0.85rem;
}

.site-foot a {
  color: var(--action);
  font-weight: 600;
  text-decoration: none;
}

.site-foot a:hover {
  text-decoration: underline;
}

@media (max-width: 560px) {
  .activity-row {
    grid-template-columns: 1fr 60px 92px;
  }

  .activity-mode {
    padding: 6px 11px;
  }

  .activity-title {
    font-size: 0.95rem;
  }

  .demo-head span {
    font-size: 0.78rem;
  }

  .site-foot {
    justify-content: center;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pitch {
    animation: none;
  }

  .mic-wrap.live .mic-ring,
  .wave.live span,
  .voice-q .caret::after,
  .sum-caret::after,
  .flip-word.flip {
    animation: none;
  }

  .mic-wrap.live .mic-ring {
    opacity: 0.25;
    transform: scale(1);
  }

  #chats-chart .bar,
  #chats-chart .fadeable,
  #chats-chart .leader,
  #chats-chart .leader-dot,
  #chats-chart .today-ring,
  .tag-row,
  .tag-pill,
  .tag-count,
  .voice-q,
  .voice-a,
  .activity-row,
  .activity-seg,
  .sum-head,
  .sum-drop,
  .sum-btn .chev,
  .sum-panel,
  .sum-block,
  .sum-actions {
    transition: none;
  }
}