/* Utility-First CSS Framework - Black & White Theme */

/* === BASE RESET === */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important;
  caret-color: #000 !important;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 16px;
  line-height: 1.4;
  color: #000;
  background: #fff;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 0.75rem;
}

/* === CONTAINER === */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
.container-sm { max-width: 600px; margin: 0 auto; }
.container-md { max-width: 800px; margin: 0 auto; }
.container-lg { max-width: 1000px; margin: 0 auto; }

/* === GRID SYSTEM === */
/* Grid Container */
.grid { display: grid; }

/* Grid Template Columns */
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-7 { grid-template-columns: repeat(7, minmax(0, 1fr)); }
.grid-cols-8 { grid-template-columns: repeat(8, minmax(0, 1fr)); }
.grid-cols-9 { grid-template-columns: repeat(9, minmax(0, 1fr)); }
.grid-cols-10 { grid-template-columns: repeat(10, minmax(0, 1fr)); }
.grid-cols-11 { grid-template-columns: repeat(11, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* Grid Template Rows */
.grid-rows-1 { grid-template-rows: repeat(1, minmax(0, 1fr)); }
.grid-rows-2 { grid-template-rows: repeat(2, minmax(0, 1fr)); }
.grid-rows-3 { grid-template-rows: repeat(3, minmax(0, 1fr)); }
.grid-rows-4 { grid-template-rows: repeat(4, minmax(0, 1fr)); }
.grid-rows-5 { grid-template-rows: repeat(5, minmax(0, 1fr)); }
.grid-rows-6 { grid-template-rows: repeat(6, minmax(0, 1fr)); }

/* Grid Column Span */
.col-span-1 { grid-column: span 1 / span 1; }
.col-span-2 { grid-column: span 2 / span 2; }
.col-span-3 { grid-column: span 3 / span 3; }
.col-span-4 { grid-column: span 4 / span 4; }
.col-span-5 { grid-column: span 5 / span 5; }
.col-span-6 { grid-column: span 6 / span 6; }
.col-span-7 { grid-column: span 7 / span 7; }
.col-span-8 { grid-column: span 8 / span 8; }
.col-span-9 { grid-column: span 9 / span 9; }
.col-span-10 { grid-column: span 10 / span 10; }
.col-span-11 { grid-column: span 11 / span 11; }
.col-span-12 { grid-column: span 12 / span 12; }
.col-span-full { grid-column: 1 / -1; }

/* Grid Row Span */
.row-span-1 { grid-row: span 1 / span 1; }
.row-span-2 { grid-row: span 2 / span 2; }
.row-span-3 { grid-row: span 3 / span 3; }
.row-span-4 { grid-row: span 4 / span 4; }
.row-span-5 { grid-row: span 5 / span 5; }
.row-span-6 { grid-row: span 6 / span 6; }
.row-span-full { grid-row: 1 / -1; }

/* Grid Auto Flow */
.grid-flow-row { grid-auto-flow: row; }
.grid-flow-col { grid-auto-flow: column; }
.grid-flow-dense { grid-auto-flow: dense; }

/* Grid Auto Columns */
.auto-cols-auto { grid-auto-columns: auto; }
.auto-cols-min { grid-auto-columns: min-content; }
.auto-cols-max { grid-auto-columns: max-content; }
.auto-cols-fr { grid-auto-columns: minmax(0, 1fr); }

/* Grid Auto Rows */
.auto-rows-auto { grid-auto-rows: auto; }
.auto-rows-min { grid-auto-rows: min-content; }
.auto-rows-max { grid-auto-rows: max-content; }
.auto-rows-fr { grid-auto-rows: minmax(0, 1fr); }

/* === FLEX SYSTEM === */
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
}

.col { flex: 1; }
.col-1 { flex: 0 0 8.333%; max-width: 8.333%; }
.col-2 { flex: 0 0 16.666%; max-width: 16.666%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }
.col-4 { flex: 0 0 33.333%; max-width: 33.333%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-8 { flex: 0 0 66.666%; max-width: 66.666%; }
.col-12 { flex: 0 0 100%; max-width: 100%; }

/* === SPACING === */
/* Margin */
.m-0 { margin: 0; }
.m-1 { margin: 0.25rem; }
.m-2 { margin: 0.5rem; }
.m-3 { margin: 0.75rem; }
.m-4 { margin: 1rem; }
.m-5 { margin: 1.25rem; }
.m-6 { margin: 1.5rem; }
.m-8 { margin: 2rem; }
.m-10 { margin: 2.5rem; }
.m-12 { margin: 3rem; }
.m-auto { margin: auto; }

.mx-0 { margin-left: 0; margin-right: 0; }
.mx-1 { margin-left: 0.25rem; margin-right: 0.25rem; }
.mx-2 { margin-left: 0.5rem; margin-right: 0.5rem; }
.mx-3 { margin-left: 0.75rem; margin-right: 0.75rem; }
.mx-4 { margin-left: 1rem; margin-right: 1rem; }
.mx-6 { margin-left: 1.5rem; margin-right: 1.5rem; }
.mx-8 { margin-left: 2rem; margin-right: 2rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

.my-0 { margin-top: 0; margin-bottom: 0; }
.my-1 { margin-top: 0.25rem; margin-bottom: 0.25rem; }
.my-2 { margin-top: 0.5rem; margin-bottom: 0.5rem; }
.my-3 { margin-top: 0.75rem; margin-bottom: 0.75rem; }
.my-4 { margin-top: 1rem; margin-bottom: 1rem; }
.my-6 { margin-top: 1.5rem; margin-bottom: 1.5rem; }
.my-8 { margin-top: 2rem; margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.mb-0 { margin-bottom: 0; }
.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; }

.ml-0 { margin-left: 0; }
.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 0.75rem; }
.ml-4 { margin-left: 1rem; }
.ml-auto { margin-left: auto; }

.mr-0 { margin-right: 0; }
.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 0.75rem; }
.mr-4 { margin-right: 1rem; }
.mr-auto { margin-right: auto; }

/* Padding */
.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.p-10 { padding: 2.5rem; }
.p-12 { padding: 3rem; }

.px-0 { padding-left: 0; padding-right: 0; }
.px-1 { padding-left: 0.25rem; padding-right: 0.25rem; }
.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-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }

.py-0 { padding-top: 0; padding-bottom: 0; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.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-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: 0.25rem; }
.pt-2 { padding-top: 0.5rem; }
.pt-3 { padding-top: 0.75rem; }
.pt-4 { padding-top: 1rem; }
.pt-6 { padding-top: 1.5rem; }
.pt-8 { padding-top: 2rem; }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: 0.25rem; }
.pb-2 { padding-bottom: 0.5rem; }
.pb-3 { padding-bottom: 0.75rem; }
.pb-4 { padding-bottom: 1rem; }
.pb-6 { padding-bottom: 1.5rem; }
.pb-8 { padding-bottom: 2rem; }

.pl-0 { padding-left: 0; }
.pl-1 { padding-left: 0.25rem; }
.pl-2 { padding-left: 0.5rem; }
.pl-3 { padding-left: 0.75rem; }
.pl-4 { padding-left: 1rem; }

.pr-0 { padding-right: 0; }
.pr-1 { padding-right: 0.25rem; }
.pr-2 { padding-right: 0.5rem; }
.pr-3 { padding-right: 0.75rem; }
.pr-4 { padding-right: 1rem; }

/* === TYPOGRAPHY === */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.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; }
.text-5xl { font-size: 3rem; line-height: 1; }

.font-thin { font-weight: 100; }
.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-black { font-weight: 900; }

.italic { font-style: italic; }
.not-italic { font-style: normal; }

.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }
.normal-case { text-transform: none; }

.underline { text-decoration: underline; }
.line-through { text-decoration: line-through; }
.no-underline { text-decoration: none; }

.leading-none { line-height: 1; }
.leading-tight { line-height: 1.25; }
.leading-snug { line-height: 1.375; }
.leading-normal { line-height: 1.5; }
.leading-relaxed { line-height: 1.625; }
.leading-loose { line-height: 2; }

.tracking-tighter { letter-spacing: -0.05em; }
.tracking-tight { letter-spacing: -0.025em; }
.tracking-normal { letter-spacing: 0; }
.tracking-wide { letter-spacing: 0.025em; }
.tracking-wider { letter-spacing: 0.05em; }
.tracking-widest { letter-spacing: 0.1em; }

/* Colors */
.text-black { color: #000; }
.text-white { color: #fff; }
.text-gray-100 { color: #f7f7f7; }
.text-gray-200 { color: #e5e5e5; }
.text-gray-300 { color: #d4d4d4; }
.text-gray-400 { color: #a3a3a3; }
.text-gray-500 { color: #737373; }
.text-gray-600 { color: #525252; }
.text-gray-700 { color: #404040; }
.text-gray-800 { color: #262626; }
.text-gray-900 { color: #171717; }
.text-gray { color: #666; }

/* === DISPLAY === */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.inline-grid { display: inline-grid; }
.hidden { display: none; }

/* === FLEXBOX === */
.flex-row { flex-direction: row; }
.flex-row-reverse { flex-direction: row-reverse; }
.flex-col { flex-direction: column; }
.flex-col-reverse { flex-direction: column-reverse; }

.flex-wrap { flex-wrap: wrap; }
.flex-wrap-reverse { flex-wrap: wrap-reverse; }
.flex-nowrap { flex-wrap: nowrap; }

.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-initial { flex: 0 1 auto; }
.flex-none { flex: none; }

.flex-grow { flex-grow: 1; }
.flex-grow-0 { flex-grow: 0; }

.flex-shrink { flex-shrink: 1; }
.flex-shrink-0 { flex-shrink: 0; }

.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.items-center { align-items: center; }
.items-baseline { align-items: baseline; }
.items-stretch { align-items: stretch; }

.self-auto { align-self: auto; }
.self-start { align-self: flex-start; }
.self-end { align-self: flex-end; }
.self-center { align-self: center; }
.self-stretch { align-self: stretch; }

.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

.justify-items-start { justify-items: start; }
.justify-items-end { justify-items: end; }
.justify-items-center { justify-items: center; }
.justify-items-stretch { justify-items: stretch; }

.justify-self-auto { justify-self: auto; }
.justify-self-start { justify-self: start; }
.justify-self-end { justify-self: end; }
.justify-self-center { justify-self: center; }
.justify-self-stretch { justify-self: stretch; }

.content-start { align-content: flex-start; }
.content-end { align-content: flex-end; }
.content-center { align-content: center; }
.content-between { align-content: space-between; }
.content-around { align-content: space-around; }
.content-evenly { align-content: space-evenly; }

.place-content-center { place-content: center; }
.place-content-start { place-content: start; }
.place-content-end { place-content: end; }
.place-content-between { place-content: space-between; }
.place-content-around { place-content: space-around; }
.place-content-evenly { place-content: space-evenly; }
.place-content-stretch { place-content: stretch; }

.place-items-start { place-items: start; }
.place-items-end { place-items: end; }
.place-items-center { place-items: center; }
.place-items-stretch { place-items: stretch; }

/* Gap */
.gap-0 { gap: 0; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-5 { gap: 1.25rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-10 { gap: 2.5rem; }
.gap-12 { gap: 3rem; }

.gap-x-0 { column-gap: 0; }
.gap-x-1 { column-gap: 0.25rem; }
.gap-x-2 { column-gap: 0.5rem; }
.gap-x-3 { column-gap: 0.75rem; }
.gap-x-4 { column-gap: 1rem; }
.gap-x-6 { column-gap: 1.5rem; }
.gap-x-8 { column-gap: 2rem; }

.gap-y-0 { row-gap: 0; }
.gap-y-1 { row-gap: 0.25rem; }
.gap-y-2 { row-gap: 0.5rem; }
.gap-y-3 { row-gap: 0.75rem; }
.gap-y-4 { row-gap: 1rem; }
.gap-y-6 { row-gap: 1.5rem; }
.gap-y-8 { row-gap: 2rem; }

/* === WIDTH & HEIGHT === */
.w-0 { width: 0; }
.w-auto { width: auto; }
.w-full { width: 100%; }
.w-screen { width: 100vw; }
.w-min { width: min-content; }
.w-max { width: max-content; }
.w-fit { width: fit-content; }

.w-1\/2 { width: 50%; }
.w-1\/3 { width: 33.333333%; }
.w-2\/3 { width: 66.666667%; }
.w-1\/4 { width: 25%; }
.w-2\/4 { width: 50%; }
.w-3\/4 { width: 75%; }
.w-1\/5 { width: 20%; }
.w-2\/5 { width: 40%; }
.w-3\/5 { width: 60%; }
.w-4\/5 { width: 80%; }

.min-w-0 { min-width: 0; }
.min-w-full { min-width: 100%; }
.min-w-min { min-width: min-content; }
.min-w-max { min-width: max-content; }
.min-w-fit { min-width: fit-content; }

.max-w-0 { max-width: 0; }
.max-w-xs { max-width: 320px; }
.max-w-sm { max-width: 384px; }
.max-w-md { max-width: 448px; }
.max-w-lg { max-width: 512px; }
.max-w-xl { max-width: 576px; }
.max-w-2xl { max-width: 672px; }
.max-w-3xl { max-width: 768px; }
.max-w-4xl { max-width: 896px; }
.max-w-5xl { max-width: 1024px; }
.max-w-6xl { max-width: 1152px; }
.max-w-7xl { max-width: 1280px; }
.max-w-full { max-width: 100%; }
.max-w-min { max-width: min-content; }
.max-w-max { max-width: max-content; }
.max-w-fit { max-width: fit-content; }

.h-0 { height: 0; }
.h-auto { height: auto; }
.h-full { height: 100%; }
.h-screen { height: 100vh; }
.h-min { height: min-content; }
.h-max { height: max-content; }
.h-fit { height: fit-content; }

.min-h-0 { min-height: 0; }
.min-h-full { min-height: 100%; }
.min-h-screen { min-height: 100vh; }
.min-h-min { min-height: min-content; }
.min-h-max { min-height: max-content; }
.min-h-fit { min-height: fit-content; }

.max-h-0 { max-height: 0; }
.max-h-full { max-height: 100%; }
.max-h-screen { max-height: 100vh; }
.max-h-min { max-height: min-content; }
.max-h-max { max-height: max-content; }
.max-h-fit { max-height: fit-content; }

/* === POSITION === */
.static { position: static; }
.fixed { position: fixed; }
.absolute { position: absolute; }
.relative { position: relative; }
.sticky { position: sticky; }

.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.inset-auto { top: auto; right: auto; bottom: auto; left: auto; }

.inset-x-0 { left: 0; right: 0; }
.inset-x-auto { left: auto; right: auto; }

.inset-y-0 { top: 0; bottom: 0; }
.inset-y-auto { top: auto; bottom: auto; }

.top-0 { top: 0; }
.top-auto { top: auto; }
.right-0 { right: 0; }
.right-auto { right: auto; }
.bottom-0 { bottom: 0; }
.bottom-auto { bottom: auto; }
.left-0 { left: 0; }
.left-auto { left: auto; }

/* === BORDERS === */
.border { border-width: 1px; border-style: solid; border-color: #000; }
.border-0 { border-width: 0; }
.border-2 { border-width: 2px; border-style: solid; border-color: #000; }
.border-4 { border-width: 4px; border-style: solid; border-color: #000; }
.border-8 { border-width: 8px; border-style: solid; border-color: #000; }

.border-t { border-top-width: 1px; border-top-style: solid; border-top-color: #000; }
.border-t-0 { border-top-width: 0; }
.border-t-2 { border-top-width: 2px; border-top-style: solid; border-top-color: #000; }
.border-t-4 { border-top-width: 4px; border-top-style: solid; border-top-color: #000; }

.border-r { border-right-width: 1px; border-right-style: solid; border-right-color: #000; }
.border-r-0 { border-right-width: 0; }
.border-r-2 { border-right-width: 2px; border-right-style: solid; border-right-color: #000; }
.border-r-4 { border-right-width: 4px; border-right-style: solid; border-right-color: #000; }

.border-b { border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: #000; }
.border-b-0 { border-bottom-width: 0; }
.border-b-2 { border-bottom-width: 2px; border-bottom-style: solid; border-bottom-color: #000; }
.border-b-4 { border-bottom-width: 4px; border-bottom-style: solid; border-bottom-color: #000; }

.border-l { border-left-width: 1px; border-left-style: solid; border-left-color: #000; }
.border-l-0 { border-left-width: 0; }
.border-l-2 { border-left-width: 2px; border-left-style: solid; border-left-color: #000; }
.border-l-4 { border-left-width: 4px; border-left-style: solid; border-left-color: #000; }

.border-solid { border-style: solid; }
.border-dashed { border-style: dashed; }
.border-dotted { border-style: dotted; }
.border-double { border-style: double; }
.border-none { border-style: none; }

.border-black { border-color: #000; }
.border-white { border-color: #fff; }
.border-gray { border-color: #e1e1e1; }
.border-gray-100 { border-color: #f7f7f7; }
.border-gray-200 { border-color: #e5e5e5; }
.border-gray-300 { border-color: #d4d4d4; }
.border-gray-400 { border-color: #a3a3a3; }
.border-gray-500 { border-color: #737373; }
.border-gray-600 { border-color: #525252; }
.border-gray-700 { border-color: #404040; }
.border-gray-800 { border-color: #262626; }
.border-gray-900 { border-color: #171717; }

/* === BACKGROUND === */
.bg-transparent { background-color: transparent; }
.bg-white { background-color: #fff; }
.bg-black { background-color: #000; }
.bg-gray { background-color: #f5f5f5; }
.bg-gray-100 { background-color: #f7f7f7; }
.bg-gray-200 { background-color: #e5e5e5; }
.bg-gray-300 { background-color: #d4d4d4; }
.bg-gray-400 { background-color: #a3a3a3; }
.bg-gray-500 { background-color: #737373; }
.bg-gray-600 { background-color: #525252; }
.bg-gray-700 { background-color: #404040; }
.bg-gray-800 { background-color: #262626; }
.bg-gray-900 { background-color: #171717; }

/* === OVERFLOW === */
.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }
.overflow-visible { overflow: visible; }
.overflow-scroll { overflow: scroll; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }
.overflow-x-hidden { overflow-x: hidden; }
.overflow-y-hidden { overflow-y: hidden; }
.overflow-x-visible { overflow-x: visible; }
.overflow-y-visible { overflow-y: visible; }
.overflow-x-scroll { overflow-x: scroll; }
.overflow-y-scroll { overflow-y: scroll; }

/* === Z-INDEX === */
.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }
.z-auto { z-index: auto; }

/* === OPACITY === */
.opacity-0 { opacity: 0; }
.opacity-25 { opacity: 0.25; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* === CURSOR === */
.cursor-auto { cursor: auto; }
.cursor-default { cursor: default; }
.cursor-pointer { cursor: pointer; }
.cursor-wait { cursor: wait; }
.cursor-text { cursor: text; }
.cursor-move { cursor: move; }
.cursor-not-allowed { cursor: not-allowed; }

/* === POINTER EVENTS === */
.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }

/* === USER SELECT === */
.select-none { user-select: none; }
.select-text { user-select: text; }
.select-all { user-select: all; }
.select-auto { user-select: auto; }

/* === VISIBILITY === */
.visible { visibility: visible; }
.invisible { visibility: hidden; }

/* === TRANSITION === */
.transition-none { transition-property: none; }
.transition-all { transition-property: all; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition { transition-property: background-color, border-color, color, fill, stroke, opacity, box-shadow, transform; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-colors { transition-property: background-color, border-color, color, fill, stroke; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-opacity { transition-property: opacity; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-shadow { transition-property: box-shadow; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-transform { transition-property: transform; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }

.duration-75 { transition-duration: 75ms; }
.duration-100 { transition-duration: 100ms; }
.duration-150 { transition-duration: 150ms; }
.duration-200 { transition-duration: 200ms; }
.duration-300 { transition-duration: 300ms; }
.duration-500 { transition-duration: 500ms; }
.duration-700 { transition-duration: 700ms; }
.duration-1000 { transition-duration: 1000ms; }

.ease-linear { transition-timing-function: linear; }
.ease-in { transition-timing-function: cubic-bezier(0.4, 0, 1, 1); }
.ease-out { transition-timing-function: cubic-bezier(0, 0, 0.2, 1); }
.ease-in-out { transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); }

/* === TRANSFORM === */
.transform { transform: var(--tw-transform); }
.transform-none { transform: none; }

.scale-0 { transform: scale(0); }
.scale-50 { transform: scale(0.5); }
.scale-75 { transform: scale(0.75); }
.scale-90 { transform: scale(0.9); }
.scale-95 { transform: scale(0.95); }
.scale-100 { transform: scale(1); }
.scale-105 { transform: scale(1.05); }
.scale-110 { transform: scale(1.1); }
.scale-125 { transform: scale(1.25); }
.scale-150 { transform: scale(1.5); }

.rotate-0 { transform: rotate(0deg); }
.rotate-45 { transform: rotate(45deg); }
.rotate-90 { transform: rotate(90deg); }
.rotate-180 { transform: rotate(180deg); }
.-rotate-45 { transform: rotate(-45deg); }
.-rotate-90 { transform: rotate(-90deg); }
.-rotate-180 { transform: rotate(-180deg); }

/* === OBJECT FIT === */
.object-contain { object-fit: contain; }
.object-cover { object-fit: cover; }
.object-fill { object-fit: fill; }
.object-none { object-fit: none; }
.object-scale-down { object-fit: scale-down; }

/* === WORD BREAK === */
.break-normal { overflow-wrap: normal; word-break: normal; }
.break-words { overflow-wrap: break-word; }
.break-all { word-break: break-all; }

/* === WHITE SPACE === */
.whitespace-normal { white-space: normal; }
.whitespace-nowrap { white-space: nowrap; }
.whitespace-pre { white-space: pre; }
.whitespace-pre-line { white-space: pre-line; }
.whitespace-pre-wrap { white-space: pre-wrap; }

/* === LIST STYLES === */
.list-none { list-style-type: none; padding: 0; margin: 0; }
.list-disc { list-style-type: disc; }
.list-decimal { list-style-type: decimal; }

/* === BUTTONS (Base Styles) === */
.btn,
button,
input[type='button'],
input[type='reset'],
input[type='submit'] {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: #fff;
  border: 2px solid #000;
  color: #000;
  font-size: 0.875rem;
  font-weight: 400;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn:hover,
button:hover,
input[type='button']:hover,
input[type='reset']:hover,
input[type='submit']:hover {
  background-color: #000;
  color: #fff;
}

.btn-primary {
  background-color: #000;
  color: #fff;
}

.btn-primary:hover {
  background-color: #fff;
  color: #000;
}

.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.75rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }
.btn-block { display: block; width: 100%; }

/* === INPUTS (Base Styles) === */
input[type='email'],
input[type='number'],
input[type='password'],
input[type='search'],
input[type='tel'],
input[type='text'],
input[type='url'],
input[type='date'],
input[type='time'],
input[type='color'],
textarea,
select {
  width: 100%;
  padding: 0.5rem;
  border: 2px solid #000;
  background: #fff;
  color: #000;
  caret-color: #000 !important;
  font-size: 0.875rem;
  font-family: inherit;
}

input:focus,
textarea:focus,
select:focus {
  border-color: #000;
  outline: none;
  caret-color: #000 !important;
}

textarea {
  resize: vertical;
  min-height: 80px;
  caret-color: #000 !important;
}

textarea#input-text,
textarea#output-text {
  caret-color: #000 !important;
}

/* === LINKS (Base Styles) === */
a {
  color: #000;
  text-decoration: underline;
}

a:hover {
  color: #333;
}

/* === TABLES (Base Styles) === */
table {
  width: 100%;
  border: 2px solid #000;
  border-collapse: collapse;
}

th,
td {
  border: 1px solid #000;
  padding: 1rem;
  text-align: left;
}

th {
  font-weight: 700;
}

/* === CODE (Base Styles) === */
code {
  background: #f4f5f6;
  border: 1px solid #000;
  padding: 0.2rem 0.5rem;
  font-family: monospace;
  font-size: 0.875em;
}

pre {
  background: #f4f5f6;
  border: 1px solid #000;
  padding: 1rem;
  overflow-x: auto;
}

pre code {
  border: none;
  padding: 0;
  background: none;
}

/* === RESPONSIVE UTILITIES === */

/* Small devices (sm) - min-width: 640px */
@media (min-width: 640px) {
  .sm\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sm\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .sm\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .sm\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .sm\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  
  .sm\:col-span-1 { grid-column: span 1 / span 1; }
  .sm\:col-span-2 { grid-column: span 2 / span 2; }
  .sm\:col-span-3 { grid-column: span 3 / span 3; }
  .sm\:col-span-4 { grid-column: span 4 / span 4; }
  .sm\:col-span-6 { grid-column: span 6 / span 6; }
  .sm\:col-span-12 { grid-column: span 12 / span 12; }
  .sm\:col-span-full { grid-column: 1 / -1; }
  
  .sm\:flex { display: flex; }
  .sm\:grid { display: grid; }
  .sm\:hidden { display: none; }
  .sm\:block { display: block; }
  
  .sm\:flex-row { flex-direction: row; }
  .sm\:flex-col { flex-direction: column; }
  
  .sm\:gap-2 { gap: 0.5rem; }
  .sm\:gap-4 { gap: 1rem; }
  .sm\:gap-6 { gap: 1.5rem; }
  
  .sm\:text-sm { font-size: 0.875rem; }
  .sm\:text-base { font-size: 1rem; }
  .sm\:text-lg { font-size: 1.125rem; }
  .sm\:text-xl { font-size: 1.25rem; }
  
  .sm\:w-full { width: 100%; }
  .sm\:w-auto { width: auto; }
  .sm\:w-1\/2 { width: 50%; }
}

/* Medium devices (md) - min-width: 768px */
@media (min-width: 768px) {
  .md\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .md\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .md\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .md\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  
  .md\:col-span-1 { grid-column: span 1 / span 1; }
  .md\:col-span-2 { grid-column: span 2 / span 2; }
  .md\:col-span-3 { grid-column: span 3 / span 3; }
  .md\:col-span-4 { grid-column: span 4 / span 4; }
  .md\:col-span-6 { grid-column: span 6 / span 6; }
  .md\:col-span-12 { grid-column: span 12 / span 12; }
  .md\:col-span-full { grid-column: 1 / -1; }
  
  .md\:flex { display: flex; }
  .md\:grid { display: grid; }
  .md\:hidden { display: none; }
  .md\:block { display: block; }
  
  .md\:flex-row { flex-direction: row; }
  .md\:flex-col { flex-direction: column; }
  
  .md\:gap-2 { gap: 0.5rem; }
  .md\:gap-4 { gap: 1rem; }
  .md\:gap-6 { gap: 1.5rem; }
  
  .md\:text-sm { font-size: 0.875rem; }
  .md\:text-base { font-size: 1rem; }
  .md\:text-lg { font-size: 1.125rem; }
  .md\:text-xl { font-size: 1.25rem; }
  .md\:text-2xl { font-size: 1.5rem; }
  
  .md\:w-full { width: 100%; }
  .md\:w-auto { width: auto; }
  .md\:w-1\/2 { width: 50%; }
  .md\:w-1\/3 { width: 33.333333%; }
  .md\:w-2\/3 { width: 66.666667%; }
}

/* Large devices (lg) - min-width: 1024px */
@media (min-width: 1024px) {
  .lg\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .lg\:grid-cols-8 { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .lg\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  
  .lg\:col-span-1 { grid-column: span 1 / span 1; }
  .lg\:col-span-2 { grid-column: span 2 / span 2; }
  .lg\:col-span-3 { grid-column: span 3 / span 3; }
  .lg\:col-span-4 { grid-column: span 4 / span 4; }
  .lg\:col-span-6 { grid-column: span 6 / span 6; }
  .lg\:col-span-8 { grid-column: span 8 / span 8; }
  .lg\:col-span-12 { grid-column: span 12 / span 12; }
  .lg\:col-span-full { grid-column: 1 / -1; }
  
  .lg\:flex { display: flex; }
  .lg\:grid { display: grid; }
  .lg\:hidden { display: none; }
  .lg\:block { display: block; }
  
  .lg\:flex-row { flex-direction: row; }
  .lg\:flex-col { flex-direction: column; }
  
  .lg\:gap-2 { gap: 0.5rem; }
  .lg\:gap-4 { gap: 1rem; }
  .lg\:gap-6 { gap: 1.5rem; }
  .lg\:gap-8 { gap: 2rem; }
  
  .lg\:text-base { font-size: 1rem; }
  .lg\:text-lg { font-size: 1.125rem; }
  .lg\:text-xl { font-size: 1.25rem; }
  .lg\:text-2xl { font-size: 1.5rem; }
  .lg\:text-3xl { font-size: 1.875rem; }
  
  .lg\:w-full { width: 100%; }
  .lg\:w-auto { width: auto; }
  .lg\:w-1\/2 { width: 50%; }
  .lg\:w-1\/3 { width: 33.333333%; }
  .lg\:w-2\/3 { width: 66.666667%; }
  .lg\:w-1\/4 { width: 25%; }
  .lg\:w-3\/4 { width: 75%; }
}

/* Extra large devices (xl) - min-width: 1280px */
@media (min-width: 1280px) {
  .xl\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .xl\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .xl\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .xl\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .xl\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .xl\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .xl\:grid-cols-8 { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .xl\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  
  .xl\:col-span-1 { grid-column: span 1 / span 1; }
  .xl\:col-span-2 { grid-column: span 2 / span 2; }
  .xl\:col-span-3 { grid-column: span 3 / span 3; }
  .xl\:col-span-4 { grid-column: span 4 / span 4; }
  .xl\:col-span-6 { grid-column: span 6 / span 6; }
  .xl\:col-span-8 { grid-column: span 8 / span 8; }
  .xl\:col-span-12 { grid-column: span 12 / span 12; }
  .xl\:col-span-full { grid-column: 1 / -1; }
  
  .xl\:flex { display: flex; }
  .xl\:grid { display: grid; }
  .xl\:hidden { display: none; }
  .xl\:block { display: block; }
  
  .xl\:gap-4 { gap: 1rem; }
  .xl\:gap-6 { gap: 1.5rem; }
  .xl\:gap-8 { gap: 2rem; }
  
  .xl\:text-lg { font-size: 1.125rem; }
  .xl\:text-xl { font-size: 1.25rem; }
  .xl\:text-2xl { font-size: 1.5rem; }
  .xl\:text-3xl { font-size: 1.875rem; }
  .xl\:text-4xl { font-size: 2.25rem; }
}

/* === CUSTOM UTILITIES === */
/* Hover Opacity */
.hover-opacity {
  transition: opacity 0.2s ease-in-out;
}
.hover-opacity:hover {
  opacity: 0.85;
}

/* Focus Outline */
.focus-outline:focus {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* No Hover Effect */
.no-hover:hover {
  background-color: initial !important;
  color: initial !important;
  opacity: 1 !important;
}

.btn-primary.no-hover:hover {
  background-color: #000 !important;
  color: #fff !important;
}

/* Text Colors */
.text-gray-600 { color: #4b5563; }
.text-gray-700 { color: #374151; }
.text-gray-800 { color: #1f2937; }
.text-blue-600 { color: #2563eb; }
.text-green-400 { color: #4ade80; }
.text-green-700 { color: #15803d; }
.text-red-700 { color: #b91c1c; }

/* Background Colors */
.bg-white { background-color: #ffffff; }
.bg-gray-50 { background-color: #f9fafb; }
.bg-gray-100 { background-color: #f3f4f6; }
.bg-gray-200 { background-color: #e5e7eb; }
.bg-gray-300 { background-color: #d1d5db; }
.bg-gray-700 { background-color: #374151; }
.bg-gray-900 { background-color: #111827; }
.bg-blue-50 { background-color: #eff6ff; }
.bg-blue-600 { background-color: #2563eb; }
.bg-green-50 { background-color: #f0fdf4; }
.bg-green-600 { background-color: #16a34a; }
.bg-red-50 { background-color: #fef2f2; }
.bg-red-600 { background-color: #dc2626; }

/* Border Colors */
.border-gray-200 { border-color: #e5e7eb; }
.border-gray-300 { border-color: #d1d5db; }
.border-gray-400 { border-color: #9ca3af; }
.border-blue-200 { border-color: #bfdbfe; }
.border-blue-600 { border-color: #2563eb; }
.border-green-200 { border-color: #bbf7d0; }
.border-red-200 { border-color: #fecaca; }

/* Max Width Utilities */
.max-w-4xl { max-width: 56rem; }
.max-w-6xl { max-width: 72rem; }

/* Additional Spacing */
.space-y-1 > * + * { margin-top: 0.25rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-3 > * + * { margin-top: 0.75rem; }

/* Additional Layout */
.inline-block { display: inline-block; }
.inline-flex { display: inline-flex; }

/* Cursor */
.cursor-pointer { cursor: pointer; }

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

/* Shadow */
.shadow-sm {
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

/* Leading (Line Height) */
.leading-relaxed { line-height: 1.625; }

/* Whitespace */
.whitespace-nowrap { white-space: nowrap; }

/* Additional Colors for Calculator */
.bg-black { background-color: #000000; }
.bg-gray-800 { background-color: #1f2937; }
.text-gray-300 { color: #d1d5db; }
.text-gray-400 { color: #9ca3af; }
.border-gray-800 { border-color: #1f2937; }
.border-0 { border-width: 0; }

/* Opacity Utilities */
.bg-opacity-50 {
  background-color: rgba(0, 0, 0, 0.5);
}

/* Max Width */
.max-w-md { max-width: 28rem; }
.max-w-96 { max-width: 24rem; }

/* Max Height */
.max-h-96 { max-height: 24rem; }

/* Height */
.h-5 { height: 1.25rem; }

/* Overflow Y */
.overflow-y-auto { overflow-y: auto; }

/* Z-index */
.z-1000 { z-index: 1000; }

/* Font Mono */
.font-mono { font-family: 'Courier New', Courier, monospace; }