* {
  box-sizing: border-box;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background-color: #0b0f18;
  color: #fff;
  overflow-x: hidden;
}

header {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  z-index: 1000;
  background: rgba(10, 12, 20, 0.85);
  backdrop-filter: blur(10px);
  padding: 20px 10%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

header h1 {
  background: linear-gradient(90deg, #00ff9d, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 1.5rem;
  letter-spacing: 0.5px;
}

nav a {
  color: #ccc;
  text-decoration: none;
  margin-left: 20px;
  font-size: 0.95rem;
  transition: color 0.3s ease;
}
nav a:hover {
  color: #00d4ff;
}

.hero {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: linear-gradient(180deg, #0b0f18 0%, #0f1625 100%), 
              url('../../images/hero-bg.jpg') center/cover no-repeat;
  background-attachment: fixed;
  padding: 0 10%;
}

.hero h2 {
  font-size: 2.6rem;
  margin-bottom: 15px;
  background: linear-gradient(90deg, #00ff9d, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  max-width: 700px;
  color: #bbb;
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 30px;
}

.cta a {
  display: inline-block;
  background: linear-gradient(90deg, #00d4ff, #00ff9d);
  color: #000;
  padding: 12px 30px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  font-size: 1rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.cta a:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0,255,157,0.2);
}

section {
  padding: 100px 10%;
}
.about, .features, .how, .download {
  max-width: 1100px;
  margin: auto;
}

.about h3, .features h3, .how h3, .download h3 {
  font-size: 2rem;
  background: linear-gradient(90deg, #00d4ff, #00ff9d);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: center;
  margin-bottom: 40px;
}

.about-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.about-content img {
  width: 420px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
}

.about-content p {
  color: #aaa;
  line-height: 1.8;
  max-width: 500px;
}

.features-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
}

.feature {
  background: #111727;
  padding: 30px;
  border-radius: 12px;
  width: 300px;
  text-align: center;
  transition: transform 0.3s ease;
}
.feature:hover {
  transform: translateY(-4px);
}
.feature h4 {
  color: #00d4ff;
  margin-bottom: 10px;
  font-size: 1.1rem;
}
.feature p {
  color: #aaa;
  font-size: 0.95rem;
  line-height: 1.6;
}

.how-steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}
.step {
  background: #121a2d;
  border-radius: 10px;
  padding: 25px;
  width: 240px;
  text-align: center;
}
.step h4 {
  color: #00ff9d;
  margin-bottom: 8px;
}

.download {
  text-align: center;
}
.download p {
  color: #aaa;
  max-width: 600px;
  margin: 10px auto 30px auto;
  line-height: 1.7;
}

footer {
  text-align: center;
  background: #0a0e16;
  padding: 30px;
  color: #777;
  font-size: 0.9rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

/* Responsif */
@media (max-width: 768px) {
  header { padding: 15px 6%; }
  .about-content { flex-direction: column; text-align: center; }
  .about-content img { width: 90%; }
  .feature { width: 90%; }
}