* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  color: #fff;
  line-height: 1.6;

  /* FUNDO ANIMADO */
  background: linear-gradient(-45deg, #000000, #1a0000, #330000, #000000);
  background-size: 400% 400%;
  animation: bgAnim 10s ease infinite;
}

@keyframes bgAnim {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* HEADER */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 10%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
}

.logo {
  color: #ff2e2e;
  text-shadow: 0 0 10px #ff2e2e;
}

/* MENU COM EFEITO NEON */
.nav a {
  margin-left: 20px;
  text-decoration: none;
  color: #fff;
  position: relative;
  transition: 0.3s;
}

.nav a:hover {
  color: #ff2e2e;
  text-shadow: 0 0 8px #ff2e2e;
}

/* LINHA ANIMADA */
.nav a::after {
  content: "";
  position: absolute;
  width: 0%;
  height: 2px;
  bottom: -5px;
  left: 0;
  background: #ff2e2e;
  transition: 0.3s;
}

.nav a:hover::after {
  width: 100%;
}

/* SECTIONS */
.section {
  padding: 60px 10%;
}

.home {
  height: 90vh;
  display: flex;
  align-items: center;
}

.container {
  max-width: 1000px;
}

/* BOTÃO COM BRILHO */
.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 25px;
  background: #ff2e2e;
  color: #fff;
  text-decoration: none;
  border-radius: 25px;
  font-weight: bold;
  transition: 0.3s;
  box-shadow: 0 0 10px #ff2e2e;
}

.btn:hover {
  background: transparent;
  color: #ff2e2e;
  border: 2px solid #ff2e2e;
  transform: scale(1.08);
  box-shadow: 0 0 20px #ff2e2e;
}

/* CARDS (VIDRO) */
.cards {
  display: flex;
  gap: 20px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.card {
  flex: 1 1 250px;
  padding: 20px;
  border-radius: 15px;

  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);

  border: 1px solid rgba(255, 46, 46, 0.3);
  transition: 0.3s;
}

.card:hover {
  transform: translateY(-10px) scale(1.03);
  border-color: #ff2e2e;
  box-shadow: 0 0 20px #ff2e2e55;
}

/* FOOTER */
.footer {
  text-align: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.6);
  color: #aaa;
}

/* RESPONSIVO */
@media (max-width: 768px) {
  .header {
    flex-direction: column;
  }

  .nav {
    margin-top: 10px;
  }

  .cards {
    flex-direction: column;
  }
}