@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Outfit:wght@400;500;600;700;800&display=swap');

/* Disable dark mode by changing selector prefix to a class we don't use */
@custom-variant dark (&:where(.dark-mode-active, .dark-mode-active *));

/* Custom variables and theme overrides */
:root {
  --font-headings: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Vibrant Mint Green accent (#2ECC71) optimized for high legibility */
  --color-emerald-50: #EEFDF4;
  --color-emerald-100: #D5F5E3;
  --color-emerald-200: #A9DFBF;
  --color-emerald-300: #58D68D;
  --color-emerald-400: #2ECC71;
  --color-emerald-500: #27AE60; /* Slightly darker green for text contrast on white */
  --color-emerald-600: #219653; /* Hover state */
  --color-emerald-700: #1E8449;
  --color-emerald-800: #145A32; /* Deep readable green for links/keywords */
  --color-emerald-900: #0B3019;
  --color-emerald-950: #05180C;

  /* Overriding Tailwind Gray colors to dark/black shades for absolute readability on white */
  --color-gray-50: #F8F9FA;   /* Light tint for background cards only */
  --color-gray-100: #F1F3F5;  /* For light gray borders/boxes */
  --color-gray-200: #E9ECEF;  /* For borders */
  --color-gray-300: #CED4DA;  /* For darker borders */
  --color-gray-400: #495057;  /* High contrast dark gray (was faint gray) */
  --color-gray-500: #343A40;  /* High contrast carbon gray (was faint gray) */
  --color-gray-600: #212529;  /* Carbon black */
  --color-gray-700: #1A1A1A;  /* Carbon black */
  --color-gray-800: #111111;  /* Pure black */
  --color-gray-900: #000000;  /* Pure black */
}

/* Global Light Theme styles */
body {
  font-family: var(--font-body);
  background-color: #ffffff; /* Pure white background */
  color: #111111; /* Carbon black text */
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(75, 85, 99, 0.4);
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(156, 163, 175, 0.5);
}

/* Scroll Progress Bar */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, #2ECC71, #27AE60);
  z-index: 100;
  width: 0%;
  transition: width 0.1s ease-out;
}

/* Glassmorphism Classes (Light variant) */
.glass {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(33, 37, 41, 0.08);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
}

/* Micro-animations */
.hover-lift {
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
}
.hover-lift:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

/* Fading Transitions */
.fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* AdSense Placeholder Styling */
.adsense-placeholder {
  position: relative;
  background: repeating-linear-gradient(
    45deg,
    rgba(75, 85, 99, 0.05),
    rgba(75, 85, 99, 0.05) 10px,
    rgba(75, 85, 99, 0.1) 10px,
    rgba(75, 85, 99, 0.1) 20px
  );
  border: 1px dashed rgba(75, 85, 99, 0.3);
  min-height: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
}

/* Sticky TOC active state */
.toc-link.active {
  color: #10b981;
  font-weight: 600;
  border-left-color: #10b981;
  padding-left: 0.75rem;
}