:root {
  --bg-dark: #121212;
  --bg-darker: #0a0a0a;
  --text-main: #e0e0e0;
  --text-heading: #ffffff;
  --accent-blue: #3b82f6;
  --accent-glow: #60a5fa;
  --accent-dark: #1e3a8a;
  --surface: #1e1e1e;
  --surface-border: #333333;
  --surface-border-hover: #4b5563;
  
  --font-heading: 'Roboto Mono', monospace;
  --font-body: 'Inter', sans-serif;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-heading);
  text-transform: uppercase;
  letter-spacing: 2px;
}

a {
  text-decoration: none;
  color: var(--accent-blue);
  transition: var(--transition);
}

a:hover {
  color: var(--accent-glow);
}

/* Glassmorphism Utility */
.glass-panel {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  transition: var(--transition);
}

.glass-panel:hover {
  border-color: var(--surface-border-hover);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  transform: translateY(-2px);
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1.5rem 5%;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--surface-border);
  transition: var(--transition);
}

header.scrolled {
  padding: 1rem 5%;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--surface-border-hover);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  transition: var(--transition);
}

.logo-img:hover {
  transform: scale(1.05);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: 3px;
}

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

nav a {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  position: relative;
  padding: 0.5rem 0;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-blue);
  transition: var(--transition);
}

nav a:hover::after, nav a.active::after {
  width: 100%;
}

nav a.active {
  color: #ffffff;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--accent-blue);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Main Layout */
main {
  min-height: 100vh;
  padding: 100px 5% 4rem;
  max-width: 1400px;
  margin: 0 auto;
}

.page-header {
  text-align: center;
  margin-bottom: 4rem;
  padding-top: 2rem;
  animation: fadeInDown 0.8s ease-out forwards;
}

.page-header h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.page-header p {
  font-size: 1.2rem;
  color: var(--text-main);
  max-width: 600px;
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-primary {
  background: var(--accent-blue);
  color: #ffffff;
  border: 1px solid var(--accent-blue);
}

.btn-primary:hover {
  background: var(--accent-glow);
  color: #ffffff;
  border-color: var(--accent-glow);
  transform: translateY(-2px);
}

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

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

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid rgba(0, 170, 255, 0.1);
  background: var(--bg-darker);
  margin-top: 4rem;
}

footer p {
  font-size: 0.9rem;
  color: rgba(208, 213, 224, 0.6);
}

/* Media Queries */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }
  
  nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(5, 5, 8, 0.98);
    border-bottom: 1px solid var(--accent-blue);
    padding: 1rem 0;
    clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
    transition: clip-path 0.4s ease-in-out;
  }
  
  nav.active {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  }
  
  nav ul {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }
  
  .page-header h1 {
    font-size: 2.2rem;
  }
}