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

/* Background cyber style */
body {
  background: radial-gradient(circle at top, #0b0c10, #000);
  font-family: 'Inter', sans-serif;
  color: #fff;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* HEADER */
header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.85);
  border-bottom: 3px solid #0ff;
  padding: 20px 0;
  text-align: center;
  z-index: 1000;
}

header h1 {
  color: #66fcf1;
  font-weight: 300;
  font-size: 2rem;
  text-transform: uppercase;
  border: 4px solid #45a29e;
  display: inline-block;
  padding: 10px 25px;
  letter-spacing: 2px;
  border-radius: 8px;
  box-shadow: 0 0 25px #0ff;
}

/* CENTAR - APP BOX */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.app-box {
  border: 3px solid #000;
  box-shadow: 0 0 25px #00ffff;
  border-radius: 15px;
  padding: 50px;
  text-align: center;
  max-width: 400px;
  width: 100%;
  background: rgba(10, 10, 10, 0.9);
}

.logo {
  width: 200px;
  margin-bottom: 30px;
}

/* PayPal dugme centrirano */
#paypal-button-container {
  display: flex;
  justify-content: center;
}

/* ABOUT SEKCIJA */
.about {
  background: #0b0c10;
  border-top: 2px solid #1f2833;
  padding: 40px 20px;
}

.about h2 {
  color: #66fcf1;
  margin-bottom: 10px;
  font-weight: 400;
}

.about p {
  color: #c5c6c7;
  max-width: 600px;
  line-height: 1.6;
}

/* FOOTER */
footer {
  background: #1f2833;
  color: #c5c6c7;
  text-align: center;
  padding: 15px 0;
  font-size: 14px;
  border-top: 2px solid #0ff;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  header h1 {
    font-size: 1.4rem;
    padding: 8px 15px;
  }

  .app-box {
    padding: 30px 20px;
  }

  .logo {
    width: 150px;
  }

  .about p {
    font-size: 0.95rem;
  }
}