body {
  font-family: "Courier New", Courier, monospace;
  margin: 0;
  background: #000;
  color: #00ff00;
  font-size: 18px;
  letter-spacing: 0.03em;
  line-height: 1.6;
  text-shadow: 0 0 2px #00ff00, 0 0 10px #008800;
  cursor: crosshair;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #111;
  border-bottom: 2px solid #00ff00;
  padding: 0.7rem 2rem;
  font-size: 1.25rem;
}

.logo {
  display: flex;
  align-items: center;
}
.logo img {
  width: 32px;
  height: 32px;
  margin-right: 10px;
  border: 1px solid #ff00ff;
  box-shadow: 0 0 8px #ff00ff;
  image-rendering: pixelated;
  filter: invert(0.8);
}
.logo span {
  color: #00ff00;
  font-weight: bold;
  letter-spacing: 2px;
  font-size: 1.4rem;
  text-transform: uppercase;
}

.download-btn {
  background: #000;
  color: #00ff00;
  border: 2px solid #00ff00;
  border-radius: 0;
  padding: 0.3rem 2rem;
  font-family: inherit;
  font-size: 1rem;
  text-decoration: none;
  font-weight: bold;
  box-shadow: 0 0 10px #00ff00;
  transition: background 0.2s, color 0.2s;
}
.download-btn:hover, .cta-btn:hover {
  background: #00ff00;
  color: #000;
  text-shadow: none;
}

header {
  border: 2px solid #00ff00;
  margin: 32px auto 24px auto;
  max-width: 850px;
  background: #111;
  box-shadow: 0 0 24px #00ff00;
  padding: 2rem 1rem 2rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  position: relative;
}
.header-content {
  max-width: 520px;
}
header h1 {
  font-size: 2.2rem;
  margin: 0 0 1.3rem 0;
  color: #00ff00;
  font-family: "Courier New", Courier, monospace;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-bottom: 1px dashed #00ff00;
  padding-bottom: 0.4rem;
}
header p {
  color: #0f0;
  margin-bottom: 1.5rem;
  font-size: 1.15rem;
}

.cta-btn {
  background: #000;
  color: #00ff00;
  border: 2px solid #00ff00;
  border-radius: 0;
  padding: 0.5rem 2.2rem;
  font-size: 1.1rem;
  font-family: inherit;
  font-weight: bold;
  text-decoration: none;
  box-shadow: 0 0 10px #00ff00;
}

.device-img {
  width: 240px;
  max-width: 90vw;
  margin-left: 2.2rem;
  margin-top: 1rem;
  border: 1px solid #00ff00;
  background: #000;
  box-shadow: 0 0 20px #00ff00;
  image-rendering: pixelated;
}

section {
  border: 2px dashed #00ff00;
  padding: 1.5rem 1.4rem 0.6rem 1.4rem;
  margin: 1rem auto 1.5rem auto;
  max-width: 800px;
  background: #111;
  box-shadow: 0 0 12px #00ff00;
  position: relative;
}

section h2 {
  color: #00ff00;
  font-size: 1.5rem;
  font-family: "Courier New", Courier, monospace;
  text-transform: uppercase;
  border-bottom: 1px solid #00ff00;
  padding-bottom: 0.2rem;
  margin-top: 0;
  margin-bottom: 1rem;
  letter-spacing: 2px;
}

ul, ol {
  margin-left: 1.2rem;
  font-size: 1.09rem;
  background: #000;
  border: 1px dashed #00ff00;
  padding: 0.6rem 1.2rem;
  color: #00ff00;
}

li {
  margin-bottom: 0.7rem;
}

a {
  color: #00ff00;
  text-decoration: underline;
  font-weight: bold;
}
a:hover {
  color: #000;
  background: #00ff00;
  text-shadow: none;
}

.download-link, .source-link {
  color: #00ff00;
  border-bottom: 1px dashed #00ff00;
  background: #000;
  display: inline-block;
  margin: 0.5rem 0;
  font-family: inherit;
  font-size: 1rem;
  padding: 0.1rem 0.5rem;
  transition: background 0.2s, color 0.2s;
}
.download-link:hover, .source-link:hover {
  color: #000;
  background: #00ff00;
  border-bottom: 1px solid #00ff00;
}

footer {
  text-align: center;
  padding: 1.4rem 1rem;
  color: #00ff00;
  background: #000;
  font-size: 1.1rem;
  border-top: 2px solid #00ff00;
  letter-spacing: 2px;
  font-family: "Courier New", Courier, monospace;
}

::-webkit-scrollbar {
  width: 10px;
  background: #111;
}
::-webkit-scrollbar-thumb {
  background: #00ff00;
  border-radius: 0;
}

@media (max-width: 900px) {
  header, section {
    max-width: 99vw;
    margin-left: 0.5vw;
    margin-right: 0.5vw;
  }
  .device-img {
    margin-left: 0;
    margin-top: 2.2rem;
    width: 90vw;
  }
}
@media (max-width: 700px) {
  header {
    flex-direction: column;
    text-align: center;
    padding: 1rem 0.3rem;
  }
  .device-img {
    margin: 2rem 0 0 0;
    width: 80vw;
  }
}