/* ---------- Base ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  }
  
  body {
    background: radial-gradient(circle at top, #0b1020, #05070f);
    color: #fff;
    min-height: 100vh;
    overflow-x: hidden;
  }
  
  /* ---------- Navbar ---------- */
  .navbar {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 40px;
    position: sticky;
    top: 0;
    z-index: 999;
    backdrop-filter: blur(14px);
    background: rgba(5, 7, 15, 0.55);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
  
  .logo {
    font-weight: 800;
    letter-spacing: 2px;
    display: flex;
    align-items: center;
    gap: 10px;
  }
  
  .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #35d3ff;
    box-shadow: 0 0 15px #35d3ff;
  }
  
  .nav-links {
    display: flex;
    gap: 22px;
  }
  
  .nav-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.78);
    font-weight: 600;
    font-size: 14px;
    transition: 0.25s;
  }
  
  .nav-links a:hover {
    color: #fff;
  }
  
  .nav-links a.active {
    color: #35d3ff;
  }
  
  /* ---------- Buttons ---------- */
  .btn {
    text-decoration: none;
    padding: 12px 16px;
    border-radius: 14px;
    font-weight: 700;
    font-size: 14px;
    display: inline-block;
    transition: 0.25s;
  }
  
  .btn-primary {
    background: linear-gradient(90deg, #35d3ff, #9b5cff);
    color: #05070f;
  }
  
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 35px rgba(53, 211, 255, 0.25);
  }
  
  .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.18);
  }
  
  .btn-secondary:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.14);
  }
  
  .btn-outline {
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    background: transparent;
  }
  
  .btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
  }
  
  /* ---------- Hero ---------- */
  .hero {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    padding: 60px 40px;
    align-items: center;
  }
  
  .tag {
    display: inline-block;
    background: rgba(255, 255, 255, 0.08);
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 13px;
    margin-bottom: 18px;
    border: 1px solid rgba(255, 255, 255, 0.12);
  }
  
  .hero h1 {
    font-size: 44px;
    line-height: 1.1;
    margin-bottom: 18px;
  }
  
  .grad {
    background: linear-gradient(90deg, #35d3ff, #9b5cff);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  .subtitle {
    font-size: 16px;
    opacity: 0.82;
    line-height: 1.6;
    max-width: 540px;
    margin-bottom: 25px;
  }
  
  .hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 25px;
  }
  
  /* ---------- Stats ---------- */
  .stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    max-width: 560px;
  }
  
  .stat-card {
    padding: 14px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }
  
  .stat-card h3 {
    font-size: 16px;
    margin-bottom: 6px;
    color: #35d3ff;
  }
  
  .stat-card p {
    font-size: 13px;
    opacity: 0.8;
  }
  
  /* ---------- Planet Card ---------- */
  .planet-card {
    position: relative;
    width: 100%;
    max-width: 420px;
    height: 420px;
    margin: auto;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
  }
  
  .planet {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    position: absolute;
    top: 90px;
    left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(circle at top left, #35d3ff, #0a1c3b);
    box-shadow: 0 0 60px rgba(53, 211, 255, 0.35);
  }
  
  /* Orbits */
  .orbit {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.18);
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
  }
  
  .orbit-1 { width: 220px; height: 220px; }
  .orbit-2 { width: 290px; height: 290px; opacity: 0.7; }
  .orbit-3 { width: 360px; height: 360px; opacity: 0.45; }
  
  /* Satellites */
  .sat {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #fff;
    position: absolute;
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.8);
  }
  
  .sat-1 { animation: orbit1 5s linear infinite; }
  .sat-2 { animation: orbit2 7s linear infinite; }
  .sat-3 { animation: orbit3 9s linear infinite; }
  
  @keyframes orbit1 {
    from { transform: translateX(-50%) rotate(0deg) translateX(110px) rotate(0deg); }
    to   { transform: translateX(-50%) rotate(360deg) translateX(110px) rotate(-360deg); }
  }
  @keyframes orbit2 {
    from { transform: translateX(-50%) rotate(0deg) translateX(145px) rotate(0deg); }
    to   { transform: translateX(-50%) rotate(360deg) translateX(145px) rotate(-360deg); }
  }
  @keyframes orbit3 {
    from { transform: translateX(-50%) rotate(0deg) translateX(180px) rotate(0deg); }
    to   { transform: translateX(-50%) rotate(360deg) translateX(180px) rotate(-360deg); }
  }
  
  .planet-info {
    position: absolute;
    bottom: 18px;
    left: 18px;
    right: 18px;
    padding: 16px;
    border-radius: 20px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }
  
  .planet-info h2 {
    font-size: 18px;
    margin-bottom: 6px;
  }
  
  .planet-info p {
    font-size: 13px;
    opacity: 0.82;
    line-height: 1.5;
  }
  
  .mini-link {
    display: inline-block;
    margin-top: 10px;
    color: #35d3ff;
    font-weight: 700;
    text-decoration: none;
  }
  
  /* ---------- Features ---------- */
  .features {
    padding: 70px 40px;
    text-align: center;
  }
  
  .features h2 {
    font-size: 30px;
    margin-bottom: 10px;
  }
  
  .section-subtitle {
    opacity: 0.75;
    max-width: 700px;
    margin: 0 auto 30px;
    line-height: 1.6;
  }
  
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    max-width: 1100px;
    margin: auto;
  }
  
  .feature-card {
    padding: 18px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    text-align: left;
    transition: 0.25s;
  }
  
  .feature-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.08);
  }
  
  .feature-card h3 {
    font-size: 17px;
    margin-bottom: 8px;
  }
  
  .feature-card p {
    opacity: 0.78;
    line-height: 1.6;
    font-size: 14px;
  }
  
  /* ---------- Footer ---------- */
  .footer {
    padding: 25px 40px;
    text-align: center;
    opacity: 0.7;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }
  
  /* ---------- Responsive ---------- */
  @media (max-width: 1000px) {
    .hero {
      grid-template-columns: 1fr;
    }
    .feature-grid {
      grid-template-columns: 1fr;
    }
    .stats {
      grid-template-columns: 1fr;
    }
    .nav-links {
      display: none;
    }
  }