/* SETLMS Design System - SANGRENES EDUTECH */
/* "Real Skills. Real Projects. Real Careers." */

/* ===== CSS VARIABLES ===== */
:root {
  /* Primary Brand Colors - SET Standard */
  --primary-dark: #2D1B69;     /* Deep purple background */
  --primary-mid: #7B2CBF;      /* Medium purple accent */
  --primary-light: #9D4EDD;    /* Light purple gradient end */
  
  /* Accent Colors - SET Standard */
  --accent-gold: #FFD700;      /* Golden yellow for buttons and highlights */
  --accent-orange: #FFA500;    /* Orange for gradients and hover states */
  --accent-green: #00ff88;     /* Success/active states */
  
  /* Text Colors - SET Standard */
  --text-primary: #FFFFFF;     /* White text for main content */
  --text-secondary: rgba(255, 255, 255, 0.8);  /* Semi-transparent white */
  --text-accent: #FFD700;      /* Gold text for highlights */
  
  /* Background Gradients - SET Standard */
  --bg-main: linear-gradient(135deg, #2D1B69 0%, #7B2CBF 50%, #9D4EDD 100%);
  --bg-card: rgba(45, 27, 105, 0.6);
  --bg-modal: linear-gradient(135deg, #2D1B69, #7B2CBF);
  
  /* Legacy compatibility */
  --set-primary: #2D1B69;
  --set-primary-light: #9D4EDD;
  --set-primary-dark: #2D1B69;
  --set-primary-gradient: var(--bg-main);
  --set-gold: #FFD700;
  --set-gold-light: #FFD700;
  --set-gold-dark: #FFA500;
  --set-gold-gradient: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
  --text-muted: rgba(255, 255, 255, 0.6);
  --text-light: #FFFFFF;
  
  /* Certification Track Colors */
  --track-data-science: linear-gradient(135deg, #3B82F6 0%, #1E40AF 100%);
  --track-data-engineering: linear-gradient(135deg, #10B981 0%, #047857 100%);
  --track-ml-ai: linear-gradient(135deg, #8B5CF6 0%, #6B46C1 100%);
  --track-cybersecurity: linear-gradient(135deg, #EF4444 0%, #B91C1C 100%);
  --track-iot-robotics: linear-gradient(135deg, #F97316 0%, #C2410C 100%);
  
  /* Background Colors */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --bg-tertiary: #F3F4F6;
  --bg-dark: #111827;
  
  /* Border Colors */
  --border-light: #E5E7EB;
  --border-medium: #D1D5DB;
  --border-dark: #9CA3AF;
  
  /* Shadow System */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-gold: 0 0 20px rgba(245, 158, 11, 0.3);
  
  /* Spacing System */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* ===== TYPOGRAPHY SYSTEM ===== */
@import url('https://fonts.googleapis.com/css2?family=Arial:wght@300;400;700&display=swap');

body {
  font-family: 'Arial', sans-serif;
  font-size: 18px; /* --font-body-size */
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-main);
}

/* Typography Hierarchy - SET Standard */
h1, .h1 {
  font-size: 80px; /* --font-title-size */
  font-weight: 700; /* --font-bold */
  color: var(--text-accent); /* Gold text for main titles */
  line-height: 1.2;
  margin-bottom: var(--space-lg);
}

h2, .h2 {
  font-size: 45px; /* --font-section-size */
  font-weight: 700; /* --font-bold */
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

h3, .h3 {
  font-size: 28px; /* --font-subtitle-size */
  font-weight: 400; /* --font-normal */
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: var(--space-sm);
  position: relative;
}

h3::after, .h3::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--accent-gold);
  border-radius: 2px;
}

h4, .h4 {
  font-size: 18px; /* --font-body-size */
  font-weight: 700; /* --font-bold */
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: var(--space-sm);
}

h5, .h5 {
  font-size: 14px; /* --font-small-size */
  font-weight: 400; /* --font-normal */
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: var(--space-sm);
}

h6, .h6 {
  font-size: 14px; /* --font-code-size */
  font-weight: 400; /* --font-normal */
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: var(--space-sm);
}

p {
  font-size: 18px; /* --font-body-size */
  font-weight: 400; /* --font-normal */
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.caption {
  font-size: 14px; /* --font-small-size */
  font-weight: 300; /* --font-light */
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ===== BUTTON SYSTEM ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

/* Primary Button - SET Gold */
.btn-primary {
  background: var(--accent-gold);
  color: var(--primary-dark);
  box-shadow: var(--shadow-md);
  font-weight: 700;
}

.btn-primary:hover {
  background: var(--accent-orange);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Secondary Button - SET Style */
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--accent-gold);
}

.btn-secondary:hover {
  background: var(--accent-gold);
  color: var(--primary-dark);
  border-color: var(--accent-gold);
}

/* Gold Accent Button - SET Standard */
.btn-gold {
  background: var(--accent-gold);
  color: var(--primary-dark);
  box-shadow: var(--shadow-md);
  font-weight: 700;
}

.btn-gold:hover {
  background: var(--accent-orange);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ===== CARD SYSTEM ===== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-gold);
}

.card-header {
  padding: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(45, 27, 105, 0.3);
}

.card-body {
  padding: var(--space-lg);
}

.card-footer {
  padding: var(--space-lg);
  border-top: 1px solid var(--border-light);
  background: var(--bg-secondary);
}

/* ===== CERTIFICATION TRACK CARDS ===== */
.track-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.track-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  transition: all var(--transition-normal);
}

.track-card[data-track="data-science"]::before {
  background: var(--track-data-science);
}

.track-card[data-track="data-engineering"]::before {
  background: var(--track-data-engineering);
}

.track-card[data-track="ml-ai"]::before {
  background: var(--track-ml-ai);
}

.track-card[data-track="cybersecurity"]::before {
  background: var(--track-cybersecurity);
}

.track-card[data-track="iot-robotics"]::before {
  background: var(--track-iot-robotics);
}

.track-card:hover::before {
  height: 8px;
}

.track-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  transition: all var(--transition-normal);
}

.track-card[data-track="data-science"] .track-icon {
  background: var(--track-data-science);
}

.track-card[data-track="data-engineering"] .track-icon {
  background: var(--track-data-engineering);
}

.track-card[data-track="ml-ai"] .track-icon {
  background: var(--track-ml-ai);
}

.track-card[data-track="cybersecurity"] .track-icon {
  background: var(--track-cybersecurity);
}

.track-card[data-track="iot-robotics"] .track-icon {
  background: var(--track-iot-robotics);
}

.track-card:hover .track-icon {
  transform: scale(1.1);
}

/* ===== NAVIGATION SYSTEM ===== */
.navbar {
  background: var(--bg-main);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
  font-weight: 700;
  color: var(--accent-gold);
  font-size: 1.5rem;
}

.nav-link {
  color: var(--text-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--accent-gold);
}

.nav-link.active {
  color: var(--accent-gold);
  position: relative;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gold);
  border-radius: 1px;
}

/* ===== HERO SECTION ===== */
.hero-section {
  background: var(--bg-main);
  color: var(--text-primary);
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: 80px; /* --font-title-size */
  font-weight: 700; /* --font-bold */
  margin-bottom: var(--space-lg);
  color: var(--accent-gold);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 28px; /* --font-subtitle-size */
  margin-bottom: var(--space-xl);
  color: var(--text-secondary);
  font-weight: 400; /* --font-normal */
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  h1, .h1 {
    font-size: 45px; /* --font-section-size */
  }
  
  h2, .h2 {
    font-size: 28px; /* --font-subtitle-size */
  }
  
  h3, .h3 {
    font-size: 18px; /* --font-body-size */
  }
  
  .hero-title {
    font-size: 45px; /* --font-section-size */
  }
  
  .btn {
    padding: var(--space-md) var(--space-lg);
  }
}

@media (max-width: 480px) {
  h1, .h1 {
    font-size: 28px; /* --font-subtitle-size */
  }
  
  .hero-title {
    font-size: 28px; /* --font-subtitle-size */
  }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus states for accessibility */
.btn:focus,
.nav-link:focus,
.card:focus {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --text-primary: #FFFFFF;
    --text-secondary: #CCCCCC;
    --border-light: #FFFFFF;
  }
}