* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: radial-gradient(circle at top, #1fa463, #042c22 65%);
  color: white;
  min-height: 100vh;
}

.app {
  width: 100%;
  max-width: 430px;
  margin: 0 auto;
  padding: 22px;
}

.topo {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tag {
  margin: 0;
  font-size: 13px;
  opacity: 0.85;
}

h1 {
  margin: 4px 0 0;
  font-size: 32px;
  letter-spacing: -1px;
}

.status {
  padding: 8px 12px;
  border-radius: 30px;
  font-size: 12px;
  font-weight: bold;
}

.online {
  background: #ffe600;
  color: #0b3b2d;
}

.painel {
  margin-top: 28px;
  background: rgba(0, 0, 0, 0.32);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 28px;
  padding: 28px 20px;
  text-align: center;
  box-shadow: 0 18px 50px rgba(0,0,0,0.25);
}

.canal {
  color: #ffe600;
  font-weight: bold;
  margin: 0;
}

h2 {
  font-size: 28px;
  margin: 8px 0;
}

#estadoVoz {
  margin: 0 0 20px;
  opacity: 0.9;
}

.ondas {
  height: 55px;
  display: flex;
  gap: 7px;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.ondas span {
  display: block;
  width: 8px;
  height: 18px;
  border-radius: 20px;
  background: #ffe600;
  opacity: 0.75;
}

.ondas.falando span {
  animation: onda 0.55s infinite alternate;
}

.ondas.falando span:nth-child(2) { animation-delay: .1s; }
.ondas.falando span:nth-child(3) { animation-delay: .2s; }
.ondas.falando span:nth-child(4) { animation-delay: .3s; }
.ondas.falando span:nth-child(5) { animation-delay: .4s; }

@keyframes onda {
  from { height: 16px; }
  to { height: 48px; }
}

.botao-falar {
  width: 210px;
  height: 210px;
  border-radius: 50%;
  border: 8px solid rgba(255,255,255,0.35);
  background: linear-gradient(145deg, #ffe600, #f39c12);
  color: #07382a;
  font-weight: 900;
  font-size: 19px;
  cursor: pointer;
  box-shadow: 0 16px 35px rgba(0,0,0,0.35);
}

.botao-falar.falando {
  background: linear-gradient(145deg, #ff4d4d, #b80f0f);
  color: white;
  transform: scale(0.96);
}

.dica {
  margin: 18px 0 0;
  font-size: 14px;
  opacity: 0.9;
}

.controles {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.controles button {
  border: 0;
  border-radius: 14px;
  padding: 12px 6px;
  background: rgba(255,255,255,0.14);
  color: white;
  font-weight: bold;
  font-size: 12px;
}

.usuarios {
  margin-top: 22px;
  background: rgba(255,255,255,0.1);
  border-radius: 22px;
  padding: 16px;
}

.usuarios h3 {
  margin: 0 0 10px;
}

.usuarios ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.8;
}