html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #080C1D;
  color: #1d1d1f;
  line-height: 1.8;
  margin: 0;
  padding: 60px 20px;
  color: #fff;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;

  background-image: url("../universe.jpg");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  
  transform: scale(1);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;

  background: rgba(0, 0, 0, 0.5);
}

body {
  min-height: 100svh;
  overflow-x: hidden;
}

.container {
  max-width: 800px;
  margin: auto;
}

h1 {
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 40px;
  color: rgba(255, 255, 255, 0.9);
}

h2 {
  font-size: 20px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #e5e5e5;
  color: rgba(255, 255, 255, 0.8);
}

p, li {
  font-size: 15px;
  color: #fff;
  color: rgba(255, 255, 255, 0.7);
}

ul {
  padding-left: 20px;
  color: rgba(255, 255, 255, 0.7);
}

small {
  color: rgba(255, 255, 255, 0.7);
}

.back-btn {
  position: fixed;
  top: 20px;
  left: 20px;
  font-size: 13px;
  color: #0071e3;
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 20px;
  background: rgba(0, 0, 0, 0.04);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: 0.2s ease;
}

.back-btn,
.lang-switch a {
  color: #ddd;
}

a {
  color: #ddd;
}

.back-btn:hover {
  background: rgba(0, 0, 0, 0.1);
}

.lang-switch {
  position: fixed;
  top: 20px;
  right: 20px;
  font-size: 13px;
}

.lang-switch span,
.lang-switch a {
  margin: 0 4px;
  text-decoration: none;
}

.lang-switch a {
  color: #C5D2DF;
}

.lang-switch .active {
  color: #ddd;
  text-decoration: underline #ccc 2px;
}

.footer {
  text-align: center;
  margin-top: 48px;
  font-size: 12px;
  color: #aaa;
}

/* =========================
   MOBILE OPTIMIZATION
========================== */
@media (max-width: 600px) {
  body {
    padding: 20px 10px;
  }
  
  body::before {
    background-position: center top;
  }
  
  .container {
    padding: 48px 18px;
  }

  .logo {
    width: 70vw;
    max-width: none;
  }

  .section {
    margin-top: 36px;
  }

  h2 {
    font-size: 17px;
  }

  p {
    font-size: 15px;
  }

  .app-card {
    flex-direction: column;
    text-align: center;
  }

  .app-icon {
    width: 72px;
    height: 72px;
  }

  .app-info p {
    font-size: 13px;
  }
}