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

html, body {
  width: 100%;
  height: 100%;
}

/* HERO */
.hero {
  width: 100%;
  min-height: 100vh;
  background: url("https://images.pexels.com/photos/210607/pexels-photo-210607.jpeg")
    no-repeat center center / cover;
  position: relative;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* OVERLAY */
.overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
}

/* CONTENT */
.content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 700px;
  padding: 20px;
  text-align: center;
}

/* LOGO */
.logo-box {
  border: 2px solid #00ff99;
  padding: 10px;
  margin: 0 auto 16px;
  border-radius: 50%;
  width: 140px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-box img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

/* TITLE */
h1 {
  font-size: 32px;
  margin-bottom: 10px;
}

/* ARROWS */
.arrows {
  font-size: 22px;
  margin-bottom: 18px;
  animation: bounce 1.5s infinite;
}

/* BUTTON */
.btn {
  display: inline-block;
  background: #2aa9e0;
  padding: 14px 26px;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  margin-bottom: 22px;
  transition: 0.3s;
}

.btn:hover {
  background: #1b7fa8;
  transform: scale(1.05);
}

/* FEATURES */
.features {
  list-style: none;
  max-width: 600px;
  margin: 0 auto 18px;
}

.features li {
  margin: 8px 0;
  font-size: 16px;
}

.green {
  color: #00ff99;
}

.yellow {
  color: #ffeb3b;
}

/* FOOTER */
.footer-text {
  color: #ff4d4d;
  font-size: 16px;
  font-weight: bold;
}

/* FB LINK */
.fb-link {
  text-decoration: none;
  color: #1877f2;
  font-weight: bold;
}

.fb-link:hover {
  text-decoration: underline;
}

/* ANIMATION */
@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(6px);
  }
}

/* MOBILE */
@media (max-width: 480px) {
  h1 {
    font-size: 24px;
  }

  .logo-box {
    width: 100px;
    height: 100px;
  }

  .features li {
    font-size: 14px;
  }

  .btn {
    font-size: 14px;
    padding: 12px 20px;
  }
}

/* LAPTOP */
@media (min-width: 768px) {
  h1 {
    font-size: 42px;
  }

  .logo-box {
    width: 160px;
    height: 160px;
  }

  .features li {
    font-size: 18px;
  }

  .btn {
    font-size: 16px;
    padding: 16px 32px;
  }
}