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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: white;
  min-height: 100vh;
  /* Fundo com imagem de avião e gradiente escuro para leitura */
  background: linear-gradient(rgba(0, 5, 20, 0.7), rgba(0, 5, 20, 0.9)),
              url('https://images.unsplash.com/photo-1436491865332-7a61a109c0f2?q=80&w=2070') center/cover no-repeat fixed;
}

.overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 20, 50, 0.2);
  z-index: 1;
  pointer-events: none;
}

header {
  text-align: center;
  padding: 40px 20px 20px;
  position: relative;
  z-index: 2;
}

h1 {
  font-size: 3.2rem;
  text-shadow: 0 0 20px #00d4ff;
  letter-spacing: 4px;
  color: #fff;
}

.subtitle {
  font-size: 1.3rem;
  margin-top: 10px;
  color: #00d4ff;
  font-weight: bold;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 25px;
  position: relative;
  z-index: 2;
}

.goal-card {
  background: rgba(0, 10, 30, 0.85);
  border: 2px solid #00d4ff;
  border-radius: 16px;
  padding: 25px;
  box-shadow: 0 0 25px rgba(0, 212, 255, 0.2);
  transition: transform 0.3s, box-shadow 0.3s;
}

.goal-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.5);
}

.goal-card h2 {
  color: #fff;
  margin-bottom: 20px;
  text-align: center;
  font-size: 1.6rem;
  text-shadow: 0 0 10px #00d4ff;
}

.countdown {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin: 20px 0;
  flex-wrap: wrap;
}

.countdown div {
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid #00d4ff;
  border-radius: 12px;
  padding: 12px 18px;
  text-align: center;
  min-width: 80px;
}

.countdown span {
  display: block;
  font-size: 2.2rem;
  font-weight: bold;
  color: #00d4ff;
  text-shadow: 0 0 15px #00d4ff;
}

.countdown small {
  display: block;
  font-size: 0.85rem;
  margin-top: 4px;
  color: #fff;
  opacity: 0.8;
}

.description {
  text-align: center;
  margin-top: 15px;
  font-size: 1rem;
  opacity: 0.8;
  font-style: italic;
}

footer {
  text-align: center;
  padding: 30px;
  position: relative;
  z-index: 2;
  font-size: 0.95rem;
  opacity: 0.7;
}

@media (max-width: 600px) {
  h1 { font-size: 2.5rem; }
  .countdown { gap: 10px; }
  .countdown div { min-width: 65px; padding: 10px; }
}