:root {
  --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --accent-color: #00ffd5;
  --glass-bg: rgba(255, 255, 255, 0.1);
  --text-light: #ffffff;
}

.bg-main {
  background: var(--bg-gradient);
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  font-family: 'Poppins', sans-serif;
}

/* Navbar Estilizada */
.navbar {
  background: rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}

.text-accent {
  color: var(--accent-color);
  /* Um brilho suave para parecer interface de tecnologia/game */
  text-shadow: 0 0 15px rgba(0, 255, 213, 0.5);
  animation: fadeIn 1.5s ease-in;
}

#frase p {
  font-weight: 300;
  max-width: 600px;
  margin: 0 auto;
}

/* Botão de Acesso */
.btn-accent {
  background-color: var(--accent-color);
  color: #1a1a1a;
  border: none;
  transition: all 0.3s ease;
}

.btn-accent:hover {
  background-color: #00e6c0;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 255, 213, 0.4);
}

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 80px;
}

.btn-cta {
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.btn-cta:hover {
  transform: scale(1.05);
  background-color: var(--accent-color);
  color: #1a1a1a;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Logo e Animações */
.logo-quiz {
  max-width: 280px;
  filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.2));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

#titulo {
  text-shadow: 2px 4px 10px rgba(0, 0, 0, 0.2);
  display: inline-block;
  transition: filter 0.5s ease;
}

#titulo.girando {
  filter: drop-shadow(0 0 10px var(--accent-color));
}

@keyframes single-spin {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); } /* Uma volta perfeita de 360º */
}

/* Bolhas de Fundo */
.bubbles {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

.bubble {
  position: absolute;
  bottom: -100px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  animation: rise 20s infinite ease-in;
}

@keyframes rise {
  0% { bottom: -100px; transform: translateX(0); opacity: 0; }
  20% { opacity: 0.5; }
  100% { bottom: 110%; transform: translateX(50px); opacity: 0; }
}

/* Configuração das Bolhas */
.bubble:nth-child(1) { left: 10%; width: 80px; height: 80px; animation-duration: 15s; }
.bubble:nth-child(2) { left: 20%; width: 40px; height: 40px; animation-duration: 18s; animation-delay: 2s; }
.bubble:nth-child(3) { left: 45%; width: 100px; height: 100px; animation-duration: 22s; }
.bubble:nth-child(4) { left: 70%; width: 60px; height: 60px; animation-duration: 16s; animation-delay: 4s; }
.bubble:nth-child(5) { left: 85%; width: 50px; height: 50px; animation-duration: 20s; }
.bubble:nth-child(6) { left: 35%; width: 30px; height: 30px; animation-duration: 12s; }