/* CSS Variables for Theme */
:root {
  --primary-color: #ff0000;
  --secondary-color: #000000;
  --background-color: #0a0a0a;
  --surface-color: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-muted: #888888;
  --border-color: #333333;
  --success-color: #00ff00;
  --warning-color: #ffaa00;
  --error-color: #ff4444;
  --shadow: 0 4px 20px rgba(255, 0, 0, 0.1);
  --shadow-hover: 0 8px 30px rgba(255, 0, 0, 0.2);
}

.light-theme {
  --background-color: #ffffff;
  --surface-color: #f8f9fa;
  --text-primary: #000000;
  --text-secondary: #333333;
  --text-muted: #666666;
  --border-color: #e0e0e0;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Rajdhani", sans-serif;
  background-color: var(--background-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Orbitron", monospace;
  font-weight: 700;
  line-height: 1.2;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  margin-bottom: 1rem;
}

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

.page-title {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--primary-color);
}

/* Binary Rain Background */
#binary-rain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.1;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ninja-logo {
  width: 40px;
  height: 40px;
  color: var(--primary-color);
}

.brand-text {
  font-family: "Orbitron", monospace;
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

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

.cart-link {
  position: relative;
}

.cart-count {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: 0.3s;
}

/* Main Content */
main {
  margin-top: 70px;
}

.page {
  display: none;
  min-height: calc(100vh - 70px);
}

.page.active {
  display: block;
}

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

/* Hero Section */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.hero-text {
  z-index: 2;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.ninja-emblem {
  width: 300px;
  height: 300px;
  animation: float 6s ease-in-out infinite;
}

.emblem-svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 20px rgba(255, 0, 0, 0.5));
}

/* Buttons */
.btn {
  padding: 1rem 2rem;
  border: none;
  border-radius: 8px;
  font-family: "Orbitron", monospace;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: #cc0000;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

/* Tools Section */
.tools-section {
  padding: 4rem 0;
  background: var(--surface-color);
}

.tools-marquee {
  overflow: hidden;
  position: relative;
}

.tools-track {
  display: flex;
  gap: 4rem;
  animation: marquee 20s linear infinite;
}

.tool-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  min-width: 150px;
}

.tool-logo {
  width: 80px;
  height: 80px;
  color: var(--primary-color);
}

/* Features Section */
.features-section {
  padding: 6rem 0;
}

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

.feature-card {
  background: var(--surface-color);
  padding: 2rem;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

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

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

/* Courses Grid */
.page-header {
  margin-bottom: 3rem;
}

.course-filters {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.search-input,
.filter-select {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--surface-color);
  color: var(--text-primary);
  font-family: inherit;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.course-card {
  background: var(--surface-color);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  cursor: pointer;
}

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

.course-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
}

.course-content {
  padding: 1.5rem;
}

.course-title {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.course-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.course-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.course-price {
  font-weight: bold;
  color: var(--primary-color);
}

.course-duration {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.course-badges {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.badge {
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
}

.badge-free {
  background: var(--success-color);
  color: white;
}

.badge-level {
  background: var(--border-color);
  color: var(--text-primary);
}

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

.instructor-card {
  background: var(--surface-color);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

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

.instructor-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  font-weight: bold;
}

.instructor-name {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.instructor-title {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.instructor-certifications {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.certification-badge {
  background: var(--primary-color);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  top: 90px;
  right: 20px;
  z-index: 10000;
}

.toast {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 0.5rem;
  min-width: 300px;
  box-shadow: var(--shadow);
  animation: slideInRight 0.3s ease;
}

.toast.success {
  border-color: var(--success-color);
}

.toast.error {
  border-color: var(--error-color);
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .ninja-emblem {
    width: 200px;
    height: 200px;
  }

  .course-filters {
    flex-direction: column;
  }

  .search-input,
  .filter-select {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 0 1rem;
  }

  .container {
    padding: 0 1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
  }
}