/* --- Layout & Flexbox --- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-grow { flex-grow: 1; }
.flex-shrink-0 { flex-shrink: 0; }
.inline { display: inline; }
.block { display: block; }
.hidden { display: none; }

/* Grid */
.grid { display: grid; }
.gap-4 { gap: 1rem; }
.gap-8 { gap: 2rem; }
.gap-12 { gap: 3rem; }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .md\:hidden { display: none; }
}
@media (min-width: 640px) {
  .sm\:flex-row { flex-direction: row; }
}

/* Sizing */
.w-full { width: 100%; }
.w-4 { width: 1rem; } .h-4 { height: 1rem; }
.w-5 { width: 1.25rem; } .h-5 { height: 1.25rem; }
.w-6 { width: 1.5rem; } .h-6 { height: 1.5rem; }
.w-8 { width: 2rem; } .h-8 { height: 2rem; }
.w-10 { width: 2.5rem; } .h-10 { height: 2.5rem; }
.w-12 { width: 3rem; } .h-12 { height: 3rem; }
.w-14 { width: 3.5rem; } .h-14 { height: 3.5rem; }
.w-16 { width: 4rem; } .h-16 { height: 4rem; }
.h-auto { height: auto; }
.max-w-2xl { max-width: 42rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-6xl { max-width: 72rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Spacing */
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mt-10 { margin-top: 2.5rem; }
.mt-auto { margin-top: auto; }
.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-4 { margin-right: 1rem; }
.ml-auto { margin-left: auto; }

.p-3 { padding: 0.75rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }
.pt-4 { padding-top: 1rem; }
.pt-8 { padding-top: 2rem; }

.space-y-1 > * + * { margin-top: 0.25rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-4 > * + * { margin-top: 1rem; }

/* Typography */
.text-center { text-align: center; }
.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; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.italic { font-style: italic; }
.font-heading { font-family: var(--font-heading); }

/* Colors */
.text-primary { color: var(--primary); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-white { color: #ffffff; }
.text-blue-100 { color: #dbeafe; }
.text-gray-300 { color: #d1d5db; }
.text-purple-600 { color: #9333ea; }
.fill-current { fill: currentColor; }

.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--text-secondary); }
.bg-white { background-color: #ffffff; }
.bg-background { background-color: var(--background); }
.bg-gray-100 { background-color: #f3f4f6; }
.bg-gray-900 { background-color: #111827; }
.bg-blue-50 { background-color: #eff6ff; }
.bg-green-50 { background-color: #f0fdf4; }
.bg-orange-50 { background-color: #fff7ed; }
.bg-purple-50 { background-color: #faf5ff; }
.bg-green-500 { background-color: #22c55e; }
.bg-transparent { background-color: transparent; }

/* Borders */
.border { border-width: 1px; border-style: solid; }
.border-t { border-top-width: 1px; border-top-style: solid; }
.border-2 { border-width: 2px; border-style: solid; }
.border-gray-100 { border-color: #f3f4f6; }
.border-gray-200 { border-color: #e5e7eb; }
.border-gray-300 { border-color: #d1d5db; }
.border-gray-800 { border-color: #1f2937; }
.border-white { border-color: #ffffff; }
.border-primary { border-color: var(--primary); }
.border-none { border: none; }

.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }

/* Focus states */
.focus\:ring-2:focus { outline: none; box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2); }
.focus\:border-primary:focus { border-color: var(--primary); }
.outline-none { outline: 2px solid transparent; outline-offset: 2px; }

/* Effects & Hover */
.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05); }
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); }
.transition { transition-property: all; transition-duration: 300ms; }
.object-cover { object-fit: cover; }

.hover\:bg-gray-100:hover { background-color: #f3f4f6; }
.hover\:bg-green-600:hover { background-color: #16a34a; }
.hover\:bg-primary-hover:hover { background-color: var(--primary-hover); }
.hover\:bg-white:hover { background-color: #ffffff; }
.hover\:text-white:hover { color: #ffffff; }
.hover\:text-primary:hover { color: var(--primary); }

/* Positioning */
.fixed { position: fixed; }
.bottom-6 { bottom: 1.5rem; }
.right-6 { right: 1.5rem; }
.left-6 { left: 1.5rem; }
.z-50 { z-index: 50; }

/* Animations */
@keyframes bounce-slow {
  0%, 100% { transform: translateY(-5%); }
  50% { transform: translateY(0); }
}
.animate-bounce-slow { animation: bounce-slow 3s infinite; }