:root {
  --bg: #10131a;
  --room-1: #2a3350;
  --room-2: #171a24;
  --text: #eef1f6;
  --text-dim: #aeb6c6;
  --accent: #5b8cff;
  --accent-2: #7c5cff;
  --live: #34d17a;
  --card: rgba(14, 16, 22, 0.72);
  --card-border: rgba(255, 255, 255, 0.10);
  --radius: 16px;
  --font: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont,
    "Segoe UI", system-ui, "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  overflow: hidden;
}

.stage {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

/* ── Sala de aula ─────────────────────────────────────── */
.stage {
  /* cor de destaque do tema atual (muda via data-tema) */
  --tema: #6f7bff;
  --tema-soft: rgba(111, 123, 255, 0.16);
  /* parede azul-marinho (base) — cada matéria dá uma leve puxada de cor */
  --wall-1: #2c4174;
  --wall-2: #1e2f57;
  --wall-3: #152140;
}
.stage[data-tema="matematica"] { --tema: #5b8cff; --tema-soft: rgba(91, 140, 255, 0.16); }
.stage[data-tema="ciencias"]   { --tema: #34d17a; --tema-soft: rgba(52, 209, 122, 0.16);
  --wall-1: #1f3b4a; --wall-2: #16304a; --wall-3: #0e1f38; }
.stage[data-tema="historia"]   { --tema: #e0b15a; --tema-soft: rgba(224, 177, 90, 0.16);
  --wall-1: #34324f; --wall-2: #26213e; --wall-3: #16132a; }
.stage[data-tema="geografia"]  { --tema: #3fb8c9; --tema-soft: rgba(63, 184, 201, 0.16);
  --wall-1: #1f3d54; --wall-2: #163449; --wall-3: #0e2136; }
.stage[data-tema="portugues"]  { --tema: #e0607a; --tema-soft: rgba(224, 96, 122, 0.16);
  --wall-1: #3a2c50; --wall-2: #2a2040; --wall-3: #18122b; }
.stage[data-tema="ingles"]     { --tema: #9b6cff; --tema-soft: rgba(155, 108, 255, 0.16);
  --wall-1: #33305c; --wall-2: #241f47; --wall-3: #150f2e; }

.room { position: absolute; inset: 0; z-index: 0; overflow: hidden; }

/* ── Modo foto: usa a render da sala como fundo ───────────
   5 imagens por classe de tela (public/scene/). O texto do app fica
   sobreposto na área do quadro-verde — posição por breakpoint (cada
   render tem o quadro num lugar). Sem a classe cena-foto, vale o
   cenário desenhado em CSS. */
.room-photo {
  position: absolute;
  inset: 0;
  display: none;
  background: #16223f center / cover no-repeat;
  background-image: url("/scene/fundo-desktop-1920x1080.webp");
}
.room-tint {
  position: absolute;
  inset: 0;
  display: none;
  pointer-events: none;
  background: var(--tema);
  opacity: 0.22;
  mix-blend-mode: soft-light;
  transition: opacity 0.8s ease, background 0.8s ease;
}
.cena-foto .room-photo,
.cena-foto .room-tint { display: block; }
/* a foto já traz parede, estante, janela, relógio, planta, tapete, pufe e ícones */
.cena-foto .room-wall,
.cena-foto .room-clock,
.cena-foto .room-window,
.cena-foto .room-neon,
.cena-foto .room-shelf,
.cena-foto .room-globe,
.cena-foto .room-plant,
.cena-foto .room-floor,
.cena-foto .room-rug,
.cena-foto .room-beanbag { display: none; }

.cena-foto .board-frame {
  background: none;
  border: 0;
  border-image: none;
  box-shadow: none;
  padding: clamp(6px, 1.5vh, 24px) 2% 0;
  gap: clamp(4px, 1.4vh, 18px);
}
.cena-foto .room-board::after { display: none; }
.cena-foto .board-text {
  letter-spacing: 0.5px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
}
.cena-foto .board-example {
  max-width: 100%;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
}
.cena-foto .board-example .katex { font-size: 1.1em; }
.cena-foto .floaties { opacity: 0.3; }
.cena-foto .floaty { filter: drop-shadow(0 0 12px var(--tema)); }
.cena-foto .room::after {
  background: radial-gradient(75% 65% at 50% 46%, transparent 60%, rgba(0, 0, 0, 0.26) 100%);
}

/* desktop 1920×1080 (padrão) — quadro ~x27–65%, y~15–56% */
.cena-foto .room-board {
  top: 15%;
  left: 27%;
  width: 37%;
  height: clamp(66px, 19vh, 190px);
  transform: none;
}
.cena-foto .board-text { font-size: clamp(16px, 1.5vw + 0.5vh, 38px); }
.cena-foto .board-example { font-size: clamp(20px, 2.2vw + 0.9vh, 58px); }

/* notebook 1440×900 — quadro ~x27–71%, y~17–60% */
@media (max-width: 1400px) and (orientation: landscape) {
  .room-photo { background-image: url("/scene/fundo-notebook-1440x900.webp"); }
  .cena-foto .room-board { top: 18%; left: 30%; width: 40%; height: clamp(60px, 19vh, 175px); }
}

/* tablet horizontal 1024×768 — quadro ~x24–75%, y~19–63% */
@media (max-width: 1024px) and (orientation: landscape) {
  .room-photo { background-image: url("/scene/fundo-tablet-horizontal-1024x768.webp"); }
  .cena-foto .room-board { top: 20%; left: 27%; width: 46%; height: clamp(54px, 18vh, 150px); }
  .cena-foto .board-text { font-size: clamp(14px, 2.4vw, 30px); }
  .cena-foto .board-example { font-size: clamp(17px, 3.6vw, 44px); }
}

/* tablet vertical 768×1024 — quadro ~x24–72%, y~28–55% */
@media (orientation: portrait) {
  .room-photo { background-image: url("/scene/fundo-tablet-vertical-768x1024.webp"); }
  .cena-foto .room-board { top: 29%; left: 26%; width: 44%; height: clamp(46px, 14vh, 120px); }
  .cena-foto .board-text { font-size: clamp(13px, 2.8vw, 26px); }
  .cena-foto .board-example { font-size: clamp(16px, 4.2vw, 40px); }
}

/* celular 1080×1920 — quadro ~x26–78%, y~30–53% */
@media (orientation: portrait) and (max-width: 620px) {
  .room-photo { background-image: url("/scene/fundo-celular-1080x1920.webp"); }
  .cena-foto .room-board { top: 31%; left: 29%; width: 44%; height: clamp(40px, 12vh, 100px); }
  .cena-foto .board-text { font-size: clamp(12px, 3.4vw, 20px); }
  .cena-foto .board-example { font-size: clamp(15px, 5vw, 30px); }
}

/* parede azul-marinho + spots quentes do teto + brilho de LED */
.room-wall {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 32% at 30% -6%, rgba(255, 214, 150, 0.20), transparent 60%),
    radial-gradient(60% 32% at 70% -6%, rgba(255, 214, 150, 0.16), transparent 60%),
    radial-gradient(80% 60% at 92% 44%, rgba(120, 180, 255, 0.12), transparent 62%),
    linear-gradient(180deg, var(--wall-1) 0%, var(--wall-2) 55%, var(--wall-3) 100%);
  transition: background 0.8s ease;
}
/* textura discreta de "sala/planejamento" que some perto do chão */
.room-wall::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1.5px);
  background-size: 46px 46px;
  -webkit-mask-image: linear-gradient(180deg, #000 0 58%, transparent 86%);
          mask-image: linear-gradient(180deg, #000 0 58%, transparent 86%);
}

/* ícones em "neon" nas laterais do quadro (acompanham a cor do tema) */
.room-neon {
  position: absolute;
  top: 8%;
  bottom: 2%;
  z-index: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: clamp(24px, 3.2vw, 46px);
  line-height: 1;
}
.room-neon-l { right: 100%; margin-right: clamp(10px, 4vw, 60px); top: 26%; }
.room-neon-r { left: 100%; margin-left: clamp(10px, 4vw, 60px); }
.room-neon span {
  opacity: 0.92;
  filter:
    drop-shadow(0 0 4px #fff)
    drop-shadow(0 0 10px var(--tema))
    drop-shadow(0 0 22px var(--tema));
  animation: neonFlick 7s ease-in-out infinite;
}
.room-neon span:nth-child(2) { animation-delay: -2.3s; }
.room-neon span:nth-child(3) { animation-delay: -4.6s; }
@keyframes neonFlick {
  0%, 100% { opacity: 0.85; }
  44% { opacity: 1; }
  48% { opacity: 0.65; }
  52% { opacity: 0.95; }
}

/* relógio de parede */
.room-clock {
  position: absolute;
  top: 12%;
  right: 4%;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, #f4f7fb, #dde3ec 70%);
  border: 3px solid #b9c1cf;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
  z-index: 0;
}
.room-clock::before,
.room-clock::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: #39414f;
  border-radius: 2px;
  transform-origin: bottom center;
}
.room-clock::before { width: 3px; height: 34%; transform: translate(-50%, -100%) rotate(32deg); }
.room-clock::after  { width: 3px; height: 24%; transform: translate(-50%, -100%) rotate(-64deg); }

/* janela com persiana e luz do dia */
.room-window {
  position: absolute;
  top: 19%;
  right: 3%;
  width: 21vw;
  max-width: 280px;
  height: 44%;
  border-radius: 6px;
  background: linear-gradient(160deg, #cfe6ff 0%, #e6f2ff 50%, #f2f9ff 100%);
  box-shadow: 0 0 120px 40px rgba(190, 225, 255, 0.20), inset 0 0 0 10px #5a3f27;
  opacity: 0.8;
}
.room-window::before {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 2px;
  background: repeating-linear-gradient(
    180deg,
    rgba(214, 228, 246, 0.92) 0 6px,
    rgba(150, 176, 212, 0.55) 6px 13px
  );
}
.room-window::after {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 50%;
  width: 4px;
  margin-left: -2px;
  background: rgba(90, 63, 39, 0.8);
}

/* quadro-verde atrás da professora, moldura de madeira */
.room-board {
  position: absolute;
  top: 9%;
  left: 50%;
  transform: translateX(-50%);
  width: min(50vw, 600px);
  height: 37%;
}
.board-frame {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(75% 55% at 50% 0%, rgba(255, 255, 255, 0.08), transparent 72%),
    linear-gradient(180deg, #204234 0%, #183a2c 60%, #143324 100%);
  border: 14px solid #6b4a2c;
  border-image: linear-gradient(160deg, #8a5f38, #593c22) 1;
  border-radius: 10px;
  box-shadow:
    0 22px 55px rgba(0, 0, 0, 0.45),
    inset 0 0 70px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 4%;
  padding: 5% 24px;
}
/* apoio de giz */
.room-board::after {
  content: "";
  position: absolute;
  left: -2%;
  right: -2%;
  bottom: -7%;
  height: 12px;
  border-radius: 3px;
  background: linear-gradient(180deg, #8a5f38, #5c3d22);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.35);
}
.stage[data-tema="historia"] .board-frame {
  background:
    radial-gradient(75% 55% at 50% 0%, rgba(255, 255, 255, 0.08), transparent 72%),
    linear-gradient(180deg, #3c3526, #302a1e 60%, #29241a);
}
.board-text {
  font-size: clamp(16px, 2.3vw, 30px);
  color: rgba(233, 240, 220, 0.8);
  letter-spacing: 0.5px;
  text-align: center;
  font-weight: 600;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.12);
}
.board-example {
  font-size: clamp(20px, 3vw, 40px);
  color: rgba(240, 245, 225, 0.95);
  text-align: center;
  line-height: 1.35;
  max-width: 92%;
  opacity: 0;
  transition: opacity 0.4s ease;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
}
.board-example.show { opacity: 1; }
.board-example .katex { color: rgba(240, 245, 225, 0.97); font-size: 1.05em; }

/* estante de livros à esquerda, com prateleiras e brilho de LED */
.room-shelf {
  position: absolute;
  left: 2.5%;
  top: 22%;
  width: 15vw;
  max-width: 185px;
  height: 40%;
  background:
    linear-gradient(180deg, #7a5636 0%, #5f4128 100%);
  border-radius: 5px;
  padding: 12px 10px;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 7px 5px;
  box-shadow:
    0 24px 44px rgba(0, 0, 0, 0.35),
    inset 0 0 0 2px rgba(0, 0, 0, 0.15),
    -6px 0 26px -6px rgba(120, 180, 255, 0.4);
  opacity: 0.95;
}
.room-shelf span {
  display: block;
  width: 13px;
  height: 40%;
  border-radius: 2px;
  background: var(--tema);
  opacity: 0.8;
}
.room-shelf span:nth-child(2n) { height: 36%; filter: hue-rotate(45deg) brightness(1.15); }
.room-shelf span:nth-child(3n) { height: 44%; filter: hue-rotate(-35deg); }
.room-shelf span:nth-child(4n) { filter: brightness(0.8) saturate(1.5); }
.room-shelf span:nth-child(5n) { filter: hue-rotate(90deg) brightness(1.1); }

/* globo em cima da estante */
.room-globe {
  position: absolute;
  left: 6%;
  top: 15%;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #86ccea, #2f7fb0 72%);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.35), inset -6px -6px 12px rgba(0, 0, 0, 0.25);
  z-index: 0;
}
.room-globe::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -9px;
  width: 8px;
  height: 12px;
  transform: translateX(-50%);
  background: #c9a24a;
}

/* plantinha no canto */
.room-plant {
  position: absolute;
  left: 4%;
  bottom: 7%;
  width: 60px;
  height: 90px;
  background:
    radial-gradient(circle at 50% 30%, #3f8f5a 0 38%, transparent 40%),
    radial-gradient(circle at 30% 45%, #47a066 0 26%, transparent 28%),
    radial-gradient(circle at 70% 45%, #47a066 0 26%, transparent 28%);
}
.room-plant::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 34px;
  height: 34px;
  transform: translateX(-50%);
  background: #b9713f;
  border-radius: 4px 4px 6px 6px;
}

/* piso de madeira */
.room-floor {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 25%;
  background:
    repeating-linear-gradient(90deg, rgba(0, 0, 0, 0.10) 0 2px, transparent 2px 94px),
    linear-gradient(180deg, #7a5636 0%, #5a3d25 58%, #452e1c 100%);
  box-shadow: inset 0 16px 40px rgba(0, 0, 0, 0.35);
}

/* tapete redondo */
.room-rug {
  position: absolute;
  left: 50%;
  bottom: 1.5%;
  transform: translateX(-50%);
  width: min(58vw, 660px);
  height: 15%;
  border-radius: 50%;
  background: radial-gradient(ellipse at 50% 38%, #efe6d2 0%, #e2d5ba 68%, #d5c5a2 100%);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.28), inset 0 -3px 24px rgba(0, 0, 0, 0.12);
  opacity: 0.92;
  z-index: 0;
}

/* pufe amarelo */
.room-beanbag {
  position: absolute;
  right: 8%;
  bottom: 9%;
  width: 120px;
  height: 88px;
  background: radial-gradient(circle at 40% 30%, #ffd35f, #f2b333 68%, #d99a24 100%);
  border-radius: 50% 50% 46% 46% / 62% 62% 40% 40%;
  box-shadow: 0 20px 32px rgba(0, 0, 0, 0.35);
  z-index: 0;
}
.room-beanbag::after {
  content: "";
  position: absolute;
  left: 22%;
  top: 12%;
  width: 46%;
  height: 40%;
  background: #3f6ea8;
  border-radius: 42%;
  transform: rotate(-12deg);
}

/* vinheta pra destacar a professora */
.room::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(72% 62% at 50% 42%, transparent 55%, rgba(0, 0, 0, 0.34) 100%);
}

@media (max-width: 560px) {
  .room-beanbag, .room-clock { display: none; }
  .room-neon { font-size: 24px; margin: 0 !important; }
  .room-neon span:nth-child(3) { display: none; }
  .room-neon-l { margin-right: 4px !important; }
  .room-neon-r { margin-left: 4px !important; }
  .room-shelf { width: 22vw; }
  .room-window { width: 26vw; }
}

/* ── Elementos flutuando por tema ─────────────────────── */
.floaties {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}
.floaty {
  position: absolute;
  bottom: -8%;
  font-size: var(--size, 1.4rem);
  color: var(--tema);
  opacity: 0;
  will-change: transform, opacity;
  animation: floatUp var(--dur, 20s) linear var(--delay, 0s) infinite;
  transition: opacity 0.35s ease;
  filter: drop-shadow(0 0 10px var(--tema-soft));
  font-weight: 700;
}
.floaty.swap { opacity: 0 !important; }
@keyframes floatUp {
  0%   { transform: translateY(0) translateX(0) rotate(0deg); opacity: 0; }
  10%  { opacity: 0.22; }
  85%  { opacity: 0.22; }
  100% { transform: translateY(-115vh) translateX(var(--drift, 0)) rotate(20deg); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .floaty { animation-duration: 40s; }
}

/* ── Marca / logo da escola ───────────────────────────── */
.brand-hero {
  width: 128px;
  height: 128px;
  object-fit: contain;
  margin: 0 auto 14px;
  display: block;
  filter: drop-shadow(0 6px 18px rgba(0, 0, 0, 0.35));
}

.brand-mark {
  position: absolute;
  right: 16px;
  bottom: 14px;
  z-index: 6;
  width: 58px;
  height: 58px;
  opacity: 0.5;
  pointer-events: none;
}
.brand-mark img { width: 100%; height: 100%; object-fit: contain; }
@media (max-width: 560px) { .brand-mark { width: 44px; height: 44px; opacity: 0.4; } }

/* logo subindo, só na abertura */
.logo-floaties {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
  opacity: 1;
  transition: opacity 1s ease;
}
.logo-floaties.off { opacity: 0; }
.logo-float {
  position: absolute;
  bottom: -18%;
  width: var(--w, 120px);
  height: var(--w, 120px);
  opacity: 0;
  animation: logoUp var(--dur, 22s) linear var(--delay, 0s) infinite;
}
.logo-float img { width: 100%; height: 100%; object-fit: contain; }
@keyframes logoUp {
  0%   { transform: translateY(0) rotate(-6deg); opacity: 0; }
  15%  { opacity: 0.11; }
  80%  { opacity: 0.11; }
  100% { transform: translateY(-135vh) rotate(6deg); opacity: 0; }
}

/* ── Avatar ───────────────────────────────────────────── */
.avatar {
  position: absolute;
  inset: 0;
  z-index: 2;
}
.avatar canvas { display: block; }

/* ── Contexto da aula ─────────────────────────────────── */
.context-card {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 5;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  backdrop-filter: blur(12px);
  display: grid;
  gap: 10px;
  min-width: 168px;
}
.context-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
}
.context-row:first-child { font-weight: 700; }
.ic {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  flex: none;
  background: var(--accent-2);
  display: inline-block;
}
.ic-ano { background: #6f7bff; }
.ic-topico { background: var(--live); }

/* ── Controles ────────────────────────────────────────── */
.controls {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 5;
  display: flex;
  gap: 10px;
}
.ctrl {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(12px);
  transition: background 0.15s ease, transform 0.1s ease;
}
.ctrl:hover { background: rgba(255, 255, 255, 0.08); }
.ctrl:active { transform: scale(0.97); }
.ctrl-ic { font-size: 15px; }

/* ── Orbe do microfone ────────────────────────────────── */
.mic-dock {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 3%;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  pointer-events: none;
}
.orb {
  position: relative;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 45%, rgba(52, 209, 122, 0.28), rgba(10, 12, 18, 0.65) 70%);
  border: 1px solid rgba(52, 209, 122, 0.5);
  box-shadow: 0 0 40px rgba(52, 209, 122, 0.25);
  transition: all 0.25s ease;
}
.mic-glyph { font-size: 28px; filter: saturate(1.4); }
.wave {
  position: absolute;
  top: 50%;
  width: 70px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--live), transparent);
  opacity: 0.35;
}
.wave-left { right: 100%; margin-right: 12px; }
.wave-right { left: 100%; margin-left: 12px; }

.status {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-dim);
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(12px);
}

.fonte-chip {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--tema);
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--tema-soft);
  border: 1px solid var(--card-border);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}
.fonte-chip.show { opacity: 1; transform: translateY(0); }

/* ── Estados ──────────────────────────────────────────── */
.stage[data-state="listening"] .orb { animation: breathe 2.4s ease-in-out infinite; }
.stage[data-state="listening"] .orb.hot {
  border-color: var(--live);
  box-shadow: 0 0 70px rgba(52, 209, 122, 0.55);
  transform: scale(1.06);
}
.stage[data-state="thinking"] .orb {
  border-color: var(--accent);
  background: radial-gradient(circle at 50% 45%, rgba(91, 140, 255, 0.30), rgba(10, 12, 18, 0.65) 70%);
  box-shadow: 0 0 44px rgba(91, 140, 255, 0.30);
  animation: spin-pulse 1.1s ease-in-out infinite;
}
.stage[data-state="thinking"] .status { color: #cdd7ff; }
.stage[data-state="speaking"] .orb {
  border-color: var(--accent-2);
  background: radial-gradient(circle at 50% 45%, rgba(124, 92, 255, 0.30), rgba(10, 12, 18, 0.65) 70%);
  box-shadow: 0 0 50px rgba(124, 92, 255, 0.35);
}
.stage[data-state="speaking"] .mic-glyph { opacity: 0.4; }
.stage[data-state="muted"] .orb { filter: grayscale(1); opacity: 0.55; }
.stage[data-state="error"] .orb { border-color: #ff6b6b; box-shadow: 0 0 40px rgba(255, 107, 107, 0.4); }

@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}
@keyframes spin-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.8; }
}

/* ── Overlay inicial ──────────────────────────────────── */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 10, 15, 0.82);
  backdrop-filter: blur(8px);
  transition: opacity 0.4s ease;
}
.overlay.hidden { opacity: 0; pointer-events: none; }
.overlay-card {
  max-width: 420px;
  text-align: center;
  padding: 36px 32px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 22px;
}
.overlay-card h1 { font-size: 26px; margin-bottom: 12px; }
.overlay-card p { color: var(--text-dim); line-height: 1.55; margin-bottom: 18px; }
.form-row { display: flex; gap: 10px; margin-bottom: 16px; }
.form-row[hidden] { display: none; }
.nome-input, .idade-input {
  padding: 13px 16px;
  font: inherit;
  font-size: 16px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  outline: none;
  text-align: center;
}
.nome-input { flex: 1; }
.idade-input { width: 92px; }
.idade-input::-webkit-outer-spin-button,
.idade-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.nome-input:focus, .idade-input:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.09);
}
.nome-input::placeholder, .idade-input::placeholder { color: var(--text-dim); opacity: 0.6; }
.overlay-card small { display: block; margin-top: 16px; color: var(--text-dim); opacity: 0.7; }
.codigo-erro {
  min-height: 1.2em;
  margin: -6px 0 10px;
  font-size: 13.5px;
  font-weight: 600;
  color: #ff8080;
}
.codigo-erro:empty { display: none; }
.start-btn {
  padding: 14px 30px;
  font: inherit;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 30px rgba(91, 140, 255, 0.35);
}
.start-btn:active { transform: scale(0.97); }

@media (max-width: 560px) {
  .context-card { min-width: 0; padding: 10px 12px; gap: 7px; }
  .context-row { font-size: 13px; }
  .ctrl span:not(.ctrl-ic) { display: none; }
  .ctrl { padding: 10px; }
  .orb { width: 92px; height: 92px; }
}