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

/* BODY */
body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(180deg, #ffffff, #f3f5f7);
  min-height: 100vh;
  color: #222;
}

/* TOP BAR */
.topbar {
  background: #0f0f0f;
  padding: 8px 10px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  z-index: 1000;
}

/* BUTTON */
.btn, a.btn {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  text-decoration: none;
  cursor: pointer;
  transition: 0.3s;
}

.btn.gold {
  background: linear-gradient(45deg, #ffd54f, #ffb300);
  color: #000;
}

.btn.telegram {
  background: linear-gradient(45deg, #1da1f2, #0088cc);
  color: #fff;
}

.btn:hover {
  transform: translateY(-2px);
}

/* HEADER */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 15px;
  background: #fff;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  z-index: 999;
}

.logo {
  font-size: 20px;
  font-weight: bold;
}

/* NAV */
.header nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.header nav a {
  text-decoration: none;
  color: #222;
  font-size: 13px;
}

/* DOWNLOAD BUTTON */
.download {
  background: #00c853;
  color: #fff !important;
  padding: 6px 12px;
  border-radius: 20px;
}

/* HERO */
.hero {
  text-align: center;
  padding: 60px 15px;
}

.hero h1 {
  font-size: 24px;
  margin-bottom: 8px;
}

.hero p {
  font-size: 13px;
  margin-bottom: 15px;
}

/* INSTALL BUTTON */
.install {
  display: inline-block;
  background: #00c853;
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 13px;
  text-decoration: none;
}

/* CONTENT BOX */
.content-box {
  background: #fff;
  margin: 20px 10px;
  padding: 20px 15px;
  border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  text-align: center;
}

.content-box h2 {
  font-size: 18px;
  margin-bottom: 10px;
}

.content-box p {
  font-size: 13px;
  line-height: 1.6;
}

/* IMAGE */
.image-box img {
  width: 100%;
  max-width: 250px;
  margin-top: 10px;
  border-radius: 10px;
}

/* DESKTOP IMPROVEMENT */
@media (min-width: 768px) {

  .topbar {
    justify-content: flex-end;
    padding: 10px 20px;
  }

  .header {
    padding: 15px 30px;
  }

  .logo {
    font-size: 24px;
  }

  .hero {
    padding: 80px 20px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero p {
    font-size: 15px;
  }

  .install {
    padding: 12px 30px;
    font-size: 14px;
  }

  .content-box {
    max-width: 800px;
    margin: 40px auto;
    padding: 30px;
  }

  .content-box h2 {
    font-size: 24px;
  }

  .content-box p {
    font-size: 15px;
  }

  .image-box img {
    max-width: 400px;
  }
}