:root {
       --primary: #6366f1;
       --accent: #f59e0b;
       --bg-dark: #05070a;
       --text-light: #f8fafc;
   }

   * {
       margin: 0;
       padding: 0;
       box-sizing: border-box;
       scroll-behavior: smooth;
   }

   body {
       background-color: var(--bg-dark);
       color: var(--text-light);
       font-family: 'Inter', sans-serif;
       overflow: hidden;
       /* Necessário para o wrapper parallax */
   }

   h1,
   h2,
   h3,
   .nav-logo {
       font-family: 'Orbitron', sans-serif;
       text-transform: uppercase;
       letter-spacing: 2px;
   }

   /* --- NAV --- */
   nav {
       position: fixed;
       top: 0;
       width: 100%;
       padding: 1.5rem 10%;
       display: flex;
       justify-content: space-between;
       align-items: center;
       background: rgba(5, 7, 10, 0.85);
       backdrop-filter: blur(10px);
       z-index: 1000;
   }

   .nav-links {
       display: flex;
       list-style: none;
       gap: 2rem;
   }

   .nav-links a {
       color: var(--text-light);
       text-decoration: none;
       font-weight: 600;
       font-size: 0.9rem;
   }

   /* --- PARALLAX WRAPPER --- */
   .parallax-wrapper {
       height: 100vh;
       overflow-x: hidden;
       overflow-y: auto;
       perspective: 300px;
   }

   .hero-section {
       position: relative;
       display: flex;
       align-items: center;
       justify-content: center;
       height: 120vh;
       transform-style: preserve-3d;
       z-index: -1;
   }

   .bg-stars {
       position: absolute;
       top: 0;
       left: 0;
       width: 100%;
       height: 150%;
       background: url('https://www.transparenttextures.com/patterns/stardust.png');
       transform: translateZ(-200px) scale(2);
       z-index: -2;
   }

   .hero-content {
       width: 520px;
       text-align: center;
       transform: translateZ(50px) scale(0.8);
       background: rgba(5, 7, 10, 0.6);
       padding: 3rem;
       border-radius: 20px;
       backdrop-filter: blur(5px);
   }

   .hero-content h1 {
       font-size: 4rem;
       margin-bottom: 1rem;
       background: linear-gradient(to right, #fff, var(--primary));
       -webkit-background-clip: text;
       -webkit-text-fill-color: transparent;
   }

   /* --- SEÇÕES --- */
   section {
       padding: 120px 10%;
       min-height: 80vh;
       position: relative;
       background: var(--bg-dark);
   }

   .section-title {
       font-size: 2.5rem;
       margin-bottom: 3rem;
       text-align: center;
       color: var(--primary);
   }

   /* --- SOBRE --- */
   .grid-about {
       display: grid;
       grid-template-columns: 1fr 1fr;
       gap: 4rem;
       align-items: center;
   }

   .about-text p {
       line-height: 1.8;
       font-size: 1.1rem;
       margin-bottom: 1.5rem;
       color: #cbd5e1;
   }

   /* --- SIMULADOR --- */
   #simulador {
       background: radial-gradient(circle at center, #1e1b4b 0%, var(--bg-dark) 100%);
   }

   .simulador-container {
       width: 100%;
       max-width: 1160px;
       height: 700px;
       margin: auto;
       border: 2px solid var(--primary);
       border-radius: 16px;
       background: rgba(0, 0, 0, 0.4);
       box-shadow: 0 0 50px rgba(99, 102, 241, 0.2);
       display: flex;
       align-items: center;
       justify-content: center;
       overflow: hidden;
   }

   #observablehq-viewof-solarSystem {
       width: 100%;
       height: 100%;
   }

   /* --- CARDS --- */
   .cards-info {
       display: grid;
       grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
       gap: 2rem;
   }

   .card {
       background: #111827;
       padding: 2.5rem;
       border-radius: 12px;
       border: 1px solid #1f2937;
       transition: 0.3s;
   }

   .card:hover {
       border-color: var(--primary);
       transform: translateY(-5px);
   }

   .card h3 {
       color: var(--accent);
       margin-bottom: 1rem;
       font-size: 1.2rem;
   }

   footer {
       text-align: center;
       padding: 4rem;
       border-top: 1px solid #1f2937;
       background: #020408;
   }

   .footer-credits {
       font-size: 0.8rem;
       color: #64748b;
       line-height: 2;
   }

   /* --- PARALLAX DIVIDER --- */
   .parallax-divider {
       position: relative;
       height: 70vh;
       overflow: hidden;
       display: flex;
       align-items: center;
       justify-content: center;
   }

   .parallax-divider::after {
       content: "";
       position: absolute;
       inset: 0;
       background: radial-gradient(circle at center,
               rgba(99, 102, 241, 0.15),
               rgba(5, 7, 10, 0.95));
       z-index: 1;
   }

   .parallax-layer {
       position: absolute;
       inset: 0;
       background-image:
           url("https://www.transparenttextures.com/patterns/stardust.png");
       background-size: 400px 400px;
       transform: translateZ(-1px) scale(2);
       opacity: 0.6;
       z-index: 0;
   }

   .parallax-content {
       position: relative;
       z-index: 2;
       text-align: center;
       max-width: 800px;
       padding: 2rem;
       backdrop-filter: blur(4px);
   }

   .parallax-content h2 {
       font-size: 2.2rem;
       margin-bottom: 1rem;
       color: var(--primary);
   }

   .parallax-content p {
       font-size: 1.1rem;
       line-height: 1.7;
       color: #cbd5e1;
   }

   /* --- HERO CTA BUTTON --- */
   .hero-cta {
       display: inline-block;
       margin-top: 2rem;
       padding: 14px 32px;
       font-family: 'Orbitron', sans-serif;
       font-size: 0.85rem;
       letter-spacing: 2px;
       text-transform: uppercase;
       text-decoration: none;
       color: #fff;
       background: linear-gradient(135deg, var(--primary), #4f46e5);
       border-radius: 999px;
       box-shadow:
           0 0 20px rgba(99, 102, 241, 0.4),
           inset 0 0 10px rgba(255, 255, 255, 0.1);
       transition: all 0.3s ease;
   }

   .hero-cta:hover {
       transform: translateY(-2px);
       box-shadow:
           0 0 35px rgba(99, 102, 241, 0.7),
           inset 0 0 15px rgba(255, 255, 255, 0.15);
   }