/* eduSYMS Edge - Shared Styles for Consistency Across All Pages */
/* Monochromatic color scheme with Poppins font */

/* Import Poppins font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

/* CSS Custom Properties - Monochromatic Theme */
:root {
  /* Primary Colors - Black & White */
  --color-primary: #000000;
  --color-primary-dark: #000000;
  --color-primary-light: #333333;
  
  /* Secondary Colors - Gray Scale */
  --color-secondary: #333333;
  --color-secondary-dark: #222222;
  --color-secondary-light: #555555;
  
  /* Accent Colors - Gray Variations */
  --color-accent: #666666;
  --color-accent-dark: #555555;
  --color-accent-light: #777777;
  
  /* Gray Scale */
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e5e5;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #a3a3a3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;
  
  /* Typography */
  --font-family: 'Poppins', system-ui, -apple-system, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Shadows */
  --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);
}

/* Base Styles */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; font-weight: var(--font-weight-black); }
h2 { font-size: 2rem; font-weight: var(--font-weight-extrabold); }
h3 { font-size: 1.5rem; font-weight: var(--font-weight-bold); }
h4 { font-size: 1.25rem; font-weight: var(--font-weight-semibold); }
h5 { font-size: 1.125rem; font-weight: var(--font-weight-semibold); }
h6 { font-size: 1rem; font-weight: var(--font-weight-medium); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-600);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-normal);
}

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

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-family);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

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

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-gray-300);
}

.btn-secondary:hover {
  background-color: var(--color-gray-100);
  border-color: var(--color-gray-400);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

/* Card Styles */
.card {
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

/* Navigation */
.nav {
  background: white;
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--spacing-md) 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-family);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
}

.nav-link {
  color: var(--color-gray-600);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-normal);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-gray-100);
}

/* Footer */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer a {
  color: var(--color-gray-400);
  text-decoration: none;
}

.footer a:hover {
  color: white;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.font-extrabold { font-weight: var(--font-weight-extrabold); }
.font-black { font-weight: var(--font-weight-black); }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-gray-50 { color: var(--color-gray-50); }
.text-gray-100 { color: var(--color-gray-100); }
.text-gray-200 { color: var(--color-gray-200); }
.text-gray-300 { color: var(--color-gray-300); }
.text-gray-400 { color: var(--color-gray-400); }
.text-gray-500 { color: var(--color-gray-500); }
.text-gray-600 { color: var(--color-gray-600); }
.text-gray-700 { color: var(--color-gray-700); }
.text-gray-800 { color: var(--color-gray-800); }
.text-gray-900 { color: var(--color-gray-900); }

.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-accent { background-color: var(--color-accent); }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }
.bg-gray-200 { background-color: var(--color-gray-200); }
.bg-gray-300 { background-color: var(--color-gray-300); }
.bg-gray-400 { background-color: var(--color-gray-400); }
.bg-gray-500 { background-color: var(--color-gray-500); }
.bg-gray-600 { background-color: var(--color-gray-600); }
.bg-gray-700 { background-color: var(--color-gray-700); }
.bg-gray-800 { background-color: var(--color-gray-800); }
.bg-gray-900 { background-color: var(--color-gray-900); }
.bg-white { background-color: white; }

/* Responsive Design */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  
  .nav-container {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.5s ease-in;
}

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

.slide-in-left {
  animation: slideInLeft 0.5s ease-out;
}

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

.slide-in-right {
  animation: slideInRight 0.5s ease-out;
}

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