:root {
  /* Colors */
  --neon-blue: #00f3ff;
  --neon-purple: #9d00ff;
  --vivid-violet: #5900ff;
  --deep-space: #0b0033;
  --dark-bg: #050510;
  --text-primary: #e0e0e0;
  --text-secondary: #a0aab2;

  /* Typography */
  --font-heading: 'Orbitron', sans-serif;
  --font-body: 'Rajdhani', sans-serif;

  /* Glows */
  --glow-blue: 0 0 10px rgba(0, 243, 255, 0.7), 0 0 20px rgba(0, 243, 255, 0.5);
  --glow-purple: 0 0 15px rgba(157, 0, 255, 0.8), 0 0 30px rgba(89, 0, 255, 0.6);
  --glass-bg: rgba(11, 0, 51, 0.7);
  --glass-border: 1px solid rgba(0, 243, 255, 0.3);

  /* Spacing */
  --container-width: 1200px;
  --spacing-section: 5rem;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--dark-bg);
  background-image: radial-gradient(circle at 15% 50%, rgba(157, 0, 255, 0.15), transparent 25%),
                    radial-gradient(circle at 85% 30%, rgba(0, 243, 255, 0.15), transparent 25%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Background Grid Effect */
.grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: linear-gradient(rgba(0, 243, 255, 0.15) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(0, 243, 255, 0.15) 1px, transparent 1px);
  background-size: 50px 50px;
  z-index: -1;
  pointer-events: none;
  perspective: 1000px;
  transform: perspective(500px) rotateX(60deg) translateY(-100px) scale(2);
  transform-origin: top;
  opacity: 0.6;
  animation: gridMove 20s linear infinite;
}

.grid-bg::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(to bottom, rgba(5,5,16,1) 0%, rgba(5,5,16,0) 40%, rgba(5,5,16,1) 100%);
  pointer-events: none;
}

@keyframes gridMove {
  from { background-position: 0 0; }
  to { background-position: 0 50px; }
}

h1, h2, h3, .logo {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header & Nav */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: var(--glass-border);
  z-index: 100;
  padding: 1rem 0;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  text-shadow: var(--glow-blue);
}

.logo .highlight {
  color: var(--neon-purple);
  text-shadow: var(--glow-purple);
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  margin: 0 1rem;
  font-weight: 600;
  font-size: 1.1rem;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.nav-links a:hover {
  color: var(--neon-blue);
  text-shadow: var(--glow-blue);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: transparent;
  color: var(--neon-blue);
  border: 2px solid var(--neon-blue);
  box-shadow: 0 0 10px rgba(0, 243, 255, 0.2) inset;
}

.btn-primary:hover {
  background: var(--neon-blue);
  color: var(--dark-bg);
  box-shadow: var(--glow-blue);
}

.btn-login {
  background: transparent;
  color: var(--neon-purple);
  border: 1px solid var(--neon-purple);
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

.btn-login:hover {
  background: rgba(157, 0, 255, 0.2);
  box-shadow: var(--glow-purple);
}

.w-100 { width: 100%; }

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 80px;
}

.hero-content {
  position: relative;
  z-index: 2;
  background: rgba(5, 5, 16, 0.5);
  padding: 3rem;
  border-radius: 15px;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(0, 243, 255, 0.1);
}

.hero h1 {
  font-size: 4rem;
  color: #fff;
  margin-bottom: 0.5rem;
  text-shadow: var(--glow-blue);
  position: relative;
  display: inline-block;
}

/* Simple Glitch Effect */
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.8;
}
.glitch::before {
  left: 2px;
  text-shadow: -2px 0 var(--neon-purple);
  animation: glitch-anim 2s infinite linear alternate-reverse;
}
.glitch::after {
  left: -2px;
  text-shadow: -2px 0 var(--neon-blue);
  animation: glitch-anim 3s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
  0% { clip-path: inset(20% 0 80% 0); }
  20% { clip-path: inset(60% 0 10% 0); }
  40% { clip-path: inset(40% 0 50% 0); }
  60% { clip-path: inset(80% 0 5% 0); }
  80% { clip-path: inset(10% 0 70% 0); }
  100% { clip-path: inset(30% 0 20% 0); }
}

.subtitle {
  font-size: 2rem;
  color: var(--neon-purple);
  text-shadow: var(--glow-purple);
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem auto;
}

/* Generic Sections */
.section {
  padding: var(--spacing-section) 0;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  color: #fff;
  margin-bottom: 3rem;
  text-shadow: var(--glow-blue);
}

/* Grid Layouts */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

/* Cards */
.card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: 8px;
  padding: 2rem;
  backdrop-filter: blur(5px);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-blue), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--glow-blue);
  border-color: var(--neon-blue);
}

.card:hover::before {
  transform: translateX(100%);
}

.card h3 {
  color: var(--neon-blue);
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.card p {
  color: var(--text-secondary);
}

.course-card .card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

/* Trainer Cards */
.trainer-card {
  text-align: center;
}

.avatar {
  width: 100px;
  height: 100px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  border: 2px solid var(--neon-purple);
  box-shadow: var(--glow-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-family: var(--font-heading);
  color: #fff;
  background: var(--deep-space);
}

.credentials {
  font-size: 0.9rem;
  color: var(--neon-purple) !important;
  margin-bottom: 1rem;
  font-weight: bold;
}

/* Footer */
footer {
  background: var(--deep-space);
  border-top: var(--glass-border);
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--neon-blue);
}

.copyright {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1rem;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(5, 5, 16, 0.9);
  backdrop-filter: blur(5px);
}

.modal-content {
  background: var(--deep-space);
  border: 1px solid var(--neon-purple);
  box-shadow: var(--glow-purple);
  margin: 15% auto;
  padding: 2rem;
  width: 90%;
  max-width: 400px;
  border-radius: 8px;
  position: relative;
}

.close-btn {
  color: var(--text-secondary);
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}

.close-btn:hover {
  color: var(--neon-blue);
}

.modal h2 {
  color: var(--neon-purple);
  margin-bottom: 1.5rem;
  text-align: center;
}

.input-group {
  margin-bottom: 1.5rem;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 0.9rem;
}

.input-group input {
  width: 100%;
  padding: 0.8rem;
  background: rgba(0,0,0,0.5);
  border: 1px solid rgba(157, 0, 255, 0.3);
  color: #fff;
  font-family: var(--font-body);
  border-radius: 4px;
}

.input-group input:focus {
  outline: none;
  border-color: var(--neon-purple);
  box-shadow: 0 0 5px rgba(157, 0, 255, 0.5);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
  .subtitle { font-size: 1.5rem; }
  .navbar .container { flex-direction: column; gap: 1rem; }
  .nav-links { margin: 1rem 0; }
  .footer-content { flex-direction: column; text-align: center; }
}