/* Paleta do app iOS (modo claro): systemBlue, systemGroupedBackground,
   secondarySystemGroupedBackground, label/secondaryLabel e as cores de status. */
:root {
  --blue: #007aff;
  --blue-top: #3395ff;
  --bg: #ffffff;
  --grouped: #f2f2f7;
  --card: #ffffff;
  --label: #000000;
  --label-2: rgba(60, 60, 67, 0.6);
  --label-3: rgba(60, 60, 67, 0.3);
  --fill: rgba(118, 118, 128, 0.12);
  --separator: rgba(60, 60, 67, 0.18);
  --orange: #ff9500;
  --green: #34c759;
  --red: #ff3b30;

  /* Formas: ações em pílula, cards 22, elementos pequenos 12. */
  --r-card: 22px;
  --r-small: 12px;

  --ease: cubic-bezier(0.23, 1, 0.32, 1);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Inter, system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace;
  --col: min(460px, 38vw);
  color-scheme: light only;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--label);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.012em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, p, dl, dd, ol { margin: 0; }
button, input { font: inherit; letter-spacing: inherit; }
a { color: inherit; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Camadas: palavra gigante < óculos 3D < conteúdo */
.giant {
  position: absolute;
  inset: 0 0 auto 0;
  height: 100svh;
  display: grid;
  place-items: center;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.giant span {
  font-size: clamp(120px, 27vw, 460px);
  font-weight: 800;
  letter-spacing: -0.065em;
  line-height: 0.8;
  color: var(--grouped);
  transform: translateY(-6svh);
  transition: color 600ms var(--ease);
  user-select: none;
}
body[data-voice="awake"] .giant span,
body[data-voice="speaking"] .giant span { color: #e5f0ff; }

.stage {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  display: block;
  touch-action: pan-y;
  cursor: grab;
}
.stage.dragging { cursor: grabbing; }
.no-3d .drag-hint { display: none; }
.stage-fallback {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  pointer-events: none;
}
.stage-fallback svg { width: min(520px, 72vw); transform: translateY(-8svh); }
.stage-fallback[hidden] { display: none; }

.leaders, .callouts {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 300ms var(--ease);
}
.leaders line { stroke: var(--label); stroke-width: 1; }
.leaders circle { fill: var(--bg); stroke: var(--label); stroke-width: 1.25; }
.callout {
  position: absolute;
  left: 0;
  top: 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--label);
  white-space: nowrap;
  background: var(--bg);
  padding: 2px 0;
  will-change: transform;
}

.ear-waves {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 2;
  width: 0;
  height: 0;
  pointer-events: none;
  opacity: 0;
}
.ear-waves i {
  position: absolute;
  left: -60px;
  top: -60px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 2px solid var(--blue);
  opacity: 0;
  animation: ear 1.8s var(--ease) infinite;
}
.ear-waves i:nth-child(2) { animation-delay: 0.6s; }
.ear-waves i:nth-child(3) { animation-delay: 1.2s; }
@keyframes ear {
  from { transform: scale(0.2); opacity: 0.5; }
  to { transform: scale(1.6); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .ear-waves i { animation: none; opacity: 0.25; }
  .ear-waves i:nth-child(1) { transform: scale(0.5); }
  .ear-waves i:nth-child(3) { transform: scale(1.4); opacity: 0.12; }
}

main { position: relative; z-index: 3; pointer-events: none; }
.copy, .nav, .btn, a, button, input, form { pointer-events: auto; }

/* Navegação */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 16px clamp(20px, 4vw, 48px);
  pointer-events: none;
}
.nav > * { pointer-events: auto; }
.wordmark { font-weight: 700; font-size: 19px; letter-spacing: -0.03em; text-decoration: none; }
.nav-links { display: flex; gap: 24px; margin-left: auto; font-size: 14px; }
.nav-links a { text-decoration: none; color: var(--label-2); transition: color 150ms var(--ease); }
.nav-links a:hover { color: var(--label); }
.lang { display: flex; align-items: center; gap: 2px; }
.lang button {
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: 0.5;
}
.lang button[aria-pressed="true"] { opacity: 1; background: var(--fill); }
.lang svg { width: 20px; height: 14px; display: block; border-radius: 2px; box-shadow: 0 0 0 0.5px var(--separator); }

.progress {
  position: fixed;
  right: clamp(12px, 2vw, 28px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  list-style: none;
  padding: 0;
  display: grid;
  gap: 10px;
}
.progress li { width: 6px; height: 6px; border-radius: 50%; background: var(--label-3); transition: background 200ms var(--ease), transform 200ms var(--ease); }
.progress li.on { background: var(--blue); transform: scale(1.35); }

/* Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 24px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--blue-top), var(--blue));
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 120ms var(--ease), opacity 120ms var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.97); }
.btn svg { width: 20px; height: 20px; fill: currentColor; }
.btn-small { min-height: 36px; padding: 0 16px; font-size: 14px; }
.btn-quiet { background: var(--fill); color: var(--red); }
.btn:focus-visible, .segmented button:focus-visible, input:focus-visible { outline: 3px solid rgba(0, 122, 255, 0.35); outline-offset: 2px; }

/* Capítulos */
.chapter {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 96px clamp(24px, 7vw, 120px);
}
.side-left { justify-content: flex-start; }
.side-right { justify-content: flex-end; }
.copy { max-width: var(--col); }
.copy.wide { max-width: 880px; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--label-2);
  margin-bottom: 16px;
}
.num { font-family: var(--mono); font-weight: 500; color: var(--blue); }
.tag { font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; background: var(--fill); color: var(--label-2); }
.tag:empty { display: none; }

h1 {
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.045em;
  font-weight: 700;
}
h2 {
  font-size: clamp(34px, 3.8vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.04em;
  font-weight: 700;
  margin-bottom: 20px;
}
.copy > p:not(.eyebrow) { color: var(--label-2); }
.copy > p + p { margin-top: 14px; }
.lede { font-size: 19px; color: var(--label-2); max-width: 520px; }
.fine { font-size: 15px; }

/* Hero */
.hero { align-items: flex-end; padding-bottom: clamp(32px, 6svh, 64px); position: relative; }
.hero-foot {
  width: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
}
.hero-copy { max-width: 560px; }
.hero-copy h1 { margin-bottom: 16px; }
.drag-hint {
  position: absolute;
  top: 88px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 13px;
  color: var(--label-3);
  pointer-events: none;
}

/* Voz: onda de 17 cápsulas e anéis, como no app */
.voice {
  width: 300px;
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
}
.voice-visual { position: relative; height: 96px; width: 100%; display: grid; place-items: center; margin-bottom: 6px; }
.wave { display: flex; align-items: center; gap: 5px; height: 62px; }
.wave i {
  width: 4px;
  height: 5px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--blue-top), var(--blue));
  transition: height 90ms ease-out;
}
.voice > p.voice-title { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; color: var(--label); }
.voice > p.voice-sub { font-size: 15px; color: var(--label-2); min-height: 44px; max-width: 300px; margin-top: 0; }
.voice .btn { margin-top: 8px; }

.rings { position: relative; width: 96px; height: 96px; display: grid; place-items: center; }
.rings i {
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--blue);
  transition: transform 300ms ease-out;
}
.rings i:nth-child(1) { width: 48px; height: 48px; opacity: 0.34; }
.rings i:nth-child(2) { width: 67px; height: 67px; opacity: 0.26; }
.rings i:nth-child(3) { width: 86px; height: 86px; opacity: 0.18; }
.rings b {
  position: relative;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(180deg, var(--blue-top), var(--blue));
  transition: transform 300ms ease-out;
}
.rings b svg { width: 22px; height: 22px; fill: currentColor; }
.rings.pulse i:nth-child(1) { transform: scale(1.06); transition-duration: 100ms; }
.rings.pulse i:nth-child(2) { transform: scale(1.10); transition-duration: 100ms; }
.rings.pulse i:nth-child(3) { transform: scale(1.14); transition-duration: 100ms; }
.rings.pulse b { transform: scale(1.08); transition-duration: 100ms; }

.voice .rings { position: absolute; opacity: 0; transform: scale(0.75); transition: opacity 250ms var(--ease), transform 350ms var(--ease); }
.voice .wave { transition: opacity 200ms var(--ease); }
.voice[data-state="speaking"] .rings { opacity: 1; transform: scale(1); }
.voice[data-state="speaking"] .wave { opacity: 0; }

/* Frase dita: palavras vão de cinza a preto conforme a rolagem */
.sentence { justify-content: center; min-height: 150svh; align-items: flex-start; }
.sentence .copy { position: sticky; top: 22svh; }
.said {
  font-size: clamp(36px, 5.2vw, 76px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.045em;
}
.said span { color: var(--label-3); transition: color 250ms var(--ease); }
.said span.on { color: var(--label); }
.said span.agent.on { color: var(--blue); }
.said-note { margin-top: 28px; max-width: 520px; color: var(--label-2); }

/* Controle segmentado do iOS */
.segmented {
  display: flex;
  padding: 3px;
  border-radius: 999px;
  background: var(--fill);
  margin: 28px 0 14px;
  width: fit-content;
  max-width: 100%;
}
.segmented button {
  border: 0;
  background: transparent;
  padding: 8px 16px;
  min-height: 36px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--label);
  cursor: pointer;
  white-space: nowrap;
  transition: background 150ms var(--ease), box-shadow 150ms var(--ease);
}
.segmented button[aria-selected="true"] { background: var(--card); box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(0, 0, 0, 0.04); font-weight: 600; }

.term {
  border-radius: var(--r-card);
  background: var(--grouped);
  overflow: hidden;
}
.term-bar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--label-2);
  border-bottom: 0.5px solid var(--separator);
}
.term-state { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font); font-weight: 600; white-space: nowrap; }
.term-state::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.term-state[data-s="ok"] { color: var(--green); }
.term-state[data-s="wip"] { color: var(--orange); }
.term-body {
  margin: 0;
  padding: 16px 18px 18px;
  min-height: 176px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--label);
  white-space: pre-wrap;
}
.term-body .dim { color: var(--label-2); }
.term-body .ok { color: var(--green); }
.term-body .you { color: var(--blue); }

/* Card de tarefa como no app */
.task {
  margin-top: 28px;
  padding: 20px;
  border-radius: var(--r-card);
  background: var(--card);
  box-shadow: 0 0 0 0.5px var(--separator), 0 12px 32px rgba(0, 0, 0, 0.06);
}
.task-status { display: flex; align-items: center; gap: 6px; font-size: 15px; font-weight: 600; color: var(--orange); transition: color 200ms var(--ease); }
.task-status svg { width: 18px; height: 18px; fill: currentColor; }
.task[data-status="completed"] .task-status { color: var(--green); }
.task[data-status="cancelled"] .task-status { color: var(--label-2); }
.task-title { font-size: 17px; font-weight: 600; margin-top: 12px; }
.task-detail { font-size: 15px; color: var(--label-2); margin-top: 4px; }
.task-actions { display: grid; gap: 10px; margin-top: 18px; }
.task-actions .btn { width: 100%; }
.task-reset { margin-top: 14px; border: 0; background: none; padding: 0; min-height: 44px; color: var(--blue); font-weight: 600; font-size: 15px; cursor: pointer; }

/* Resposta */
.reply { display: flex; align-items: center; gap: 18px; margin: 4px 0 20px; }
.reply .rings { flex: none; }
.reply-text { font-size: 21px; font-weight: 600; letter-spacing: -0.02em; line-height: 1.3; }

/* Estado real */
.status { justify-content: flex-start; }
.spec { margin-top: 12px; border-top: 0.5px solid var(--separator); max-width: 720px; }
.spec div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 15px 0;
  border-bottom: 0.5px solid var(--separator);
}
.spec dt { font-size: 17px; }
.spec dd { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 600; white-space: nowrap; }
.spec dd::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.spec dd[data-s="ok"] { color: var(--green); }
.spec dd[data-s="wip"] { color: var(--orange); }
.spec dd[data-s="no"] { color: var(--label-2); }

/* Chamada final */
.cta { justify-content: center; text-align: center; align-items: flex-end; padding-bottom: 18svh; }
.cta .copy { display: flex; flex-direction: column; align-items: center; }
.cta h2 { max-width: 760px; }
.beta-form { display: flex; gap: 10px; margin-top: 28px; width: min(480px, 100%); }
.beta-form input {
  flex: 1;
  min-width: 0;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 999px;
  border: 0;
  background: var(--grouped);
  color: var(--label);
  font-size: 17px;
}
.beta-form input::placeholder { color: var(--label-3); }
.beta-form input[aria-invalid="true"] { box-shadow: inset 0 0 0 1.5px var(--red); }
.form-msg { min-height: 24px; margin-top: 12px; font-size: 15px; color: var(--label-2); }
.form-msg[data-kind="ok"] { color: var(--green); }
.form-msg[data-kind="err"] { color: var(--red); }

.guide {
  align-items: flex-start;
  background: var(--bg);
  position: relative;
  z-index: 4;
  min-height: auto;
  padding-top: 72px;
  padding-bottom: 96px;
}
.guide h3 { font-size: 22px; letter-spacing: -0.03em; margin-bottom: 14px; }
.guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 28px; }
.steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; counter-reset: step; }
.steps li {
  position: relative;
  padding: 16px 16px 16px 56px;
  border-radius: 18px;
  background: var(--grouped);
  counter-increment: step;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 16px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.steps strong { display: block; margin-bottom: 4px; }
.steps span { display: block; color: var(--label-2); font-size: 15px; line-height: 1.45; }
.prompt-block { margin-top: 36px; }
.prompt-block > p { margin-bottom: 0; }
.prompt-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 16px; }
.prompt-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  border-radius: 18px;
  background: var(--grouped);
}
.prompt-card h4 { font-size: 17px; letter-spacing: -0.02em; }
.prompt-card p:not(.num) { color: var(--label-2); font-size: 14px; line-height: 1.4; flex: 1; }
.prompt-card .btn { align-self: flex-start; margin-top: 8px; }
.prompt-card summary { cursor: pointer; color: var(--blue); font-size: 14px; font-weight: 600; }
.prompt-card pre {
  white-space: pre-wrap;
  margin: 10px 0 0;
  max-height: 220px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.45;
  color: var(--label);
}

body[data-chapter="9"] .stage,
body[data-chapter="9"] .stage-fallback { opacity: 0; pointer-events: none; }

.foot {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 24px clamp(24px, 7vw, 120px) 32px;
  font-size: 13px;
  color: var(--label-2);
  border-top: 0.5px solid var(--separator);
  background: var(--bg);
}
.foot a { color: var(--blue); font-weight: 600; }

/* Estreito: óculos na metade de cima, texto na de baixo */
@media (max-width: 760px) {
  body { font-size: 16px; }
  .nav { gap: 12px; padding: 12px 20px; background: linear-gradient(var(--bg) 60%, rgba(255, 255, 255, 0)); }
  .nav-links { display: none; }
  .lang { margin-left: auto; }
  .nav .btn-small { margin-left: 8px; }
  .progress { display: none; }
  .chapter { padding: 52svh 20px 40px; align-items: flex-start; }
  .side-left, .side-right { justify-content: stretch; }
  .copy { max-width: none; width: 100%; background: var(--bg); }
  .giant span { transform: translateY(-27svh); font-size: 31vw; }
  .hero .copy { background: none; }
  .hero { padding-top: 0; padding-bottom: 28px; align-items: flex-end; }
  .hero-foot { flex-direction: column; align-items: stretch; gap: 28px; }
  .hero-copy { max-width: none; }
  .voice { width: 100%; }
  .drag-hint { top: auto; bottom: 8px; }
  .sentence { padding-top: 40svh; min-height: 140svh; }
  .sentence .copy { top: 44svh; }
  .said { font-size: 34px; }
  .cta { padding-top: 46svh; padding-bottom: 72px; align-items: flex-start; }
  .guide { padding-top: 28px; }
  .guide-grid, .prompt-grid { grid-template-columns: 1fr; }
  .spec div { flex-direction: column; gap: 4px; align-items: flex-start; }
  .beta-form { flex-direction: column; }
  .reply-text { font-size: 18px; }
  .segmented button { padding: 8px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 1ms !important; animation: none !important; }
}