:root {
  --primary-color: #673ab7;
  --secondary-color: #512da8;
  --accent-color: #ff4081;
  --background-dark: #121212;
  --surface-dark: #1e1e1e;
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--background-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animations */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseGradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Header & Nav */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 1.5rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: rgba(18, 18, 18, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  animation: fadeInDown 0.8s ease-out;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
}

nav a {
  color: var(--text-primary);
  text-decoration: none;
  margin-left: 2rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

nav a:hover, nav a.active {
  color: var(--accent-color);
}

/* Buttons */
.btn-primary {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 0.8rem 2rem;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: inline-block;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 15px rgba(103, 58, 183, 0.4);
}

/* Main Layout */
main {
  padding-top: 100px;
  min-height: calc(100vh - 100px);
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

/* Hero Section */
.hero {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(103,58,183,0.2) 0%, rgba(18,18,18,0) 70%);
  z-index: -1;
  animation: pulseGradient 15s ease infinite;
}

.hero-content {
  max-width: 800px;
  animation: fadeInUp 1s ease-out 0.3s both;
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* Glassmorphism Cards for content */
.content-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 3rem;
  margin: 2rem 0;
  animation: fadeInUp 0.8s ease-out;
}

.content-card h1 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--primary-color);
}

.content-card h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.content-card p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.content-card ul {
  margin-bottom: 1rem;
  padding-left: 2rem;
  color: var(--text-secondary);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  background: rgba(18, 18, 18, 0.9);
  border-top: 1px solid var(--glass-border);
  color: var(--text-secondary);
}

footer a {
  color: var(--text-secondary);
  text-decoration: none;
  margin: 0 1rem;
  transition: color 0.3s ease;
}

footer a:hover {
  color: var(--primary-color);
}

/* Responsiveness */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
  nav { display: none; } /* Simple mobile hide for now, could add hamburger */
  .content-card { padding: 1.5rem; }
}