/* Modern Design System with Burgundy Red Accent */
:root {
  /* Primary Colors - More vibrant */
  --primary-50: #fff1f3;
  --primary-100: #ffe4e8;
  --primary-200: #fecdd6;
  --primary-300: #fda4b4;
  --primary-400: #fb7185;
  --primary-500: #f43f5e;
  --primary-600: #e11d48;
  --primary-700: #be123c;
  --primary-800: #9f1239;
  --primary-900: #881337;

  /* Neutral Colors - More contrast */
  --neutral-50: #fafafa;
  --neutral-100: #f4f4f5;
  --neutral-200: #e4e4e7;
  --neutral-300: #d4d4d8;
  --neutral-400: #a1a1aa;
  --neutral-500: #71717a;
  --neutral-600: #52525b;
  --neutral-700: #3f3f46;
  --neutral-800: #27272a;
  --neutral-900: #18181b;

  /* Glass Effect Colors */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: rgba(0, 0, 0, 0.1);

  /* Surface Colors */
  --surface: #ffffff;
  --surface-variant: #f8f9fa;
  --on-surface: #18181b;
  --on-surface-variant: #3f3f46;

  /* Enhanced Shadows */
  --shadow-1: 0 2px 4px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.1);
  --shadow-2: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-3: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-4: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --shadow-glow: 0 0 15px rgba(244, 63, 94, 0.15);

  /* Spacing */
  --space-unit: 8px;
  --space-xs: calc(0.5 * var(--space-unit));
  --space-sm: calc(1 * var(--space-unit));
  --space-md: calc(2 * var(--space-unit));
  --space-lg: calc(3 * var(--space-unit));
  --space-xl: calc(4 * var(--space-unit));
  --space-xxl: calc(6 * var(--space-unit));

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 9999px;

  /* Typography */
  --font-family: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-xxl: 1.5rem;
  --font-size-xxxl: 2rem;
  --font-size-xxxxl: 2.5rem;

  /* Enhanced Animations */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-medium: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-spring: 600ms cubic-bezier(0.25, 0.1, 0.25, 1.5);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: 1.7;
  color: var(--on-surface);
  background: linear-gradient(135deg, var(--neutral-50), var(--neutral-100));
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

.container {
  width: 92%;
  max-width: 1300px;
  margin: 0 auto;
  padding: var(--space-md) 0;
}

/* Modern Glass Header */
header {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-bounce), box-shadow var(--transition-medium);
}

header:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-3), var(--shadow-glow);
}

header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  opacity: 0.8;
}

header h1 {
  margin: 0;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-800));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  position: relative;
  display: inline-block;
  font-size: var(--font-size-xxxxl);
  letter-spacing: -0.03em;
}

/* Modern Navigation */
nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-sm) var(--space-lg);
  text-decoration: none;
  color: var(--neutral-700);
  font-weight: 500;
  border-radius: var(--radius-pill);
  transition: all var(--transition-spring);
  position: relative;
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border: 1px solid var(--glass-border);
}

.nav-link:hover {
  color: var(--primary-600);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.nav-link.active {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  font-weight: 600;
  box-shadow: var(--shadow-2), var(--shadow-glow);
}

/* Modern Main Content */
main {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  margin-bottom: var(--space-lg);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-bounce), box-shadow var(--transition-medium);
}

main:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-3), var(--shadow-glow);
}

/* Modern Footer */
footer {
  text-align: center;
  padding: var(--space-xl) 0;
  color: var(--neutral-600);
  font-size: var(--font-size-sm);
}

/* Modern Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--neutral-100);
  border-radius: var(--radius-pill);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--primary-400), var(--primary-600));
  border-radius: var(--radius-pill);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(var(--primary-500), var(--primary-700));
}

/* Modern Animations */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    width: 95%;
    padding: var(--space-sm);
  }

  header,
  main {
    padding: var(--space-md);
  }

  nav {
    flex-direction: column;
  }

  .nav-link {
    width: 100%;
    justify-content: center;
  }
}

.category-description {
  font-size: var(--font-size-sm);
  color: var(--neutral-600);
  margin-top: var(--space-xs);
  transition: color var(--transition-medium);
}

.category-description.active {
  color: white;
}