/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Custom Properties */
:root {
  --color-primary-50: #f0f5ff;
  --color-primary-100: #e0ebff;
  --color-primary-200: #c2d6ff;
  --color-primary-300: #94b8ff;
  --color-primary-400: #6090ff;
  --color-primary-500: #3b6fe8;
  --color-primary-600: #2952c4;
  --color-primary-700: #1e3f9e;
  --color-primary-800: #183380;
  --color-primary-900: #142966;
  
  --color-secondary-50: #f8fafc;
  --color-secondary-100: #f1f5f9;
  --color-secondary-200: #e2e8f0;
  --color-secondary-300: #cbd5e1;
  --color-secondary-400: #94a3b8;
  --color-secondary-500: #64748b;
  --color-secondary-600: #475569;
  --color-secondary-700: #334155;
  --color-secondary-800: #1e293b;
  --color-secondary-900: #0f172a;
}

/* Base */
body { 
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
  color: var(--color-secondary-900);
}

a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; font-family: inherit; }
ul { list-style: none; }

/* Layout */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-1 { flex: 1 1 0%; }
.flex-shrink-0 { flex-shrink: 0; }
.flex-wrap { flex-wrap: wrap; }
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.inline-block { display: inline-block; }
.inline-flex { display: inline-flex; }
.hidden { display: none; }

/* Alignment */
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Spacing - Padding */
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.px-1\.5 { padding-left: 0.375rem; padding-right: 0.375rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-5 { padding-left: 1.25rem; padding-right: 1.25rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.py-0\.5 { padding-top: 0.125rem; padding-bottom: 0.125rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-1\.5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.pb-2 { padding-bottom: 0.5rem; }

/* Spacing - Margin */
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-10 { margin-bottom: 2.5rem; }
.mb-16 { margin-bottom: 4rem; }
.mt-0\.5 { margin-top: 0.125rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-3 { margin-top: 0.75rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Spacing - Gap */
.gap-0\.5 { gap: 0.125rem; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }

/* Spacing - Space */
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-3 > * + * { margin-top: 0.75rem; }

/* Sizing - Width */
.w-fit { width: fit-content; }
.w-full { width: 100%; }
.w-1 { width: 0.25rem; }
.w-2 { width: 0.5rem; }
.w-4 { width: 1rem; }
.w-5 { width: 1.25rem; }
.w-6 { width: 1.5rem; }
.w-8 { width: 2rem; }
.w-12 { width: 3rem; }
.w-16 { width: 4rem; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }

/* Sizing - Height */
.h-2 { height: 0.5rem; }
.h-4 { height: 1rem; }
.h-5 { height: 1.25rem; }
.h-6 { height: 1.5rem; }
.h-12 { height: 3rem; }
.h-16 { height: 4rem; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Typography - Size */
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }

/* Typography - Weight */
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Typography - Style */
.uppercase { text-transform: uppercase; }
.tracking-wide { letter-spacing: 0.025em; }
.whitespace-nowrap { white-space: nowrap; }

/* Colors - Background */
.bg-white { background-color: #ffffff; }
.bg-primary-50 { background-color: var(--color-primary-50); }
.bg-primary-100 { background-color: var(--color-primary-100); }
.bg-primary-600 { background-color: var(--color-primary-600); }
.bg-secondary-50 { background-color: var(--color-secondary-50); }
.bg-secondary-100 { background-color: var(--color-secondary-100); }
.bg-secondary-200 { background-color: var(--color-secondary-200); }
.bg-secondary-300 { background-color: var(--color-secondary-300); }
.bg-secondary-900 { background-color: var(--color-secondary-900); }

.bg-green-50 { background-color: #f0fdf4; }
.bg-green-100 { background-color: #dcfce7; }
.bg-green-500 { background-color: #22c55e; }
.bg-green-600 { background-color: #16a34a; }
.bg-yellow-50 { background-color: #fefce8; }
.bg-yellow-100 { background-color: #fef9c3; }
.bg-yellow-200 { background-color: #fef08a; }
.bg-yellow-600 { background-color: #ca8a04; }
.bg-red-50 { background-color: #fef2f2; }
.bg-red-100 { background-color: #fee2e2; }
.bg-red-500 { background-color: #ef4444; }
.bg-blue-100 { background-color: #dbeafe; }
.bg-blue-400 { background-color: #60a5fa; }

/* Colors - Text */
.text-white { color: #ffffff; }
.text-primary-500 { color: var(--color-primary-500); }
.text-primary-600 { color: var(--color-primary-600); }
.text-primary-700 { color: var(--color-primary-700); }
.text-secondary-400 { color: var(--color-secondary-400); }
.text-secondary-500 { color: var(--color-secondary-500); }
.text-secondary-600 { color: var(--color-secondary-600); }
.text-secondary-700 { color: var(--color-secondary-700); }
.text-secondary-900 { color: var(--color-secondary-900); }

.text-green-500 { color: #22c55e; }
.text-green-600 { color: #16a34a; }
.text-green-700 { color: #15803d; }
.text-yellow-600 { color: #ca8a04; }
.text-yellow-700 { color: #a16207; }
.text-red-700 { color: #b91c1c; }
.text-blue-600 { color: #2563eb; }

/* Borders */
.border { border-width: 1px; border-style: solid; }
.border-b { border-bottom-width: 1px; border-bottom-style: solid; }
.border-b-2 { border-bottom-width: 2px; border-bottom-style: solid; }
.border-primary-600 { border-color: var(--color-primary-600); }
.border-secondary-100 { border-color: var(--color-secondary-100); }
.border-secondary-200 { border-color: var(--color-secondary-200); }
.border-secondary-300 { border-color: var(--color-secondary-300); }
.border-green-200 { border-color: #bbf7d0; }
.border-yellow-200 { border-color: #fef08a; }

/* Border Radius */
.rounded { border-radius: 0.25rem; }
.rounded-sm { border-radius: 0.125rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }

/* Effects */
.shadow-sm { box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1); }
.opacity-60 { opacity: 0.6; }
.opacity-70 { opacity: 0.7; }
.cursor-not-allowed { cursor: not-allowed; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-x-auto { overflow-x: auto; }

/* Transitions */
.transition-colors { 
  transition-property: color, background-color, border-color;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

/* Hover States */
.hover\:bg-primary-700:hover { background-color: var(--color-primary-700); }
.hover\:bg-secondary-50:hover { background-color: var(--color-secondary-50); }
.hover\:bg-secondary-100:hover { background-color: var(--color-secondary-100); }
.hover\:bg-secondary-200:hover { background-color: var(--color-secondary-200); }
.hover\:text-secondary-900:hover { color: var(--color-secondary-900); }
.hover\:text-primary-600:hover { color: var(--color-primary-600); }

/* Group Hover */
.group:hover .group-hover\:text-primary-600 { color: var(--color-primary-600); }

/* Animation */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.animate-pulse { animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite; }

/* SVG */
svg { display: block; }
.fill-currentColor { fill: currentColor; }

/* Mark (highlight) */
mark { background-color: #fef08a; padding: 0 0.125rem; }

/* Responsive - Medium screens (768px+) */
@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* Responsive - Large screens (1024px+) */
@media (min-width: 1024px) {
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}