Base Styles

*,
*::before,
*::after {
  box-sizing: border-box;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, dl, dd,
figure, blockquote, pre, code {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

fieldset {
  border: 0;
  margin: 0;
}

hr {
  border: 0;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input,
textarea,
select,
button {
  appearance: none;
}

input,
textarea,
select {
  border-radius: 0;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
  background: #c1c1c1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #a1a1a1;
}

* {
  scrollbar-width: thin;
  scrollbar-color: #c1c1c1 #f1f1f1;
}

html {
  line-height: 1.15;
  font-size: 16px;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
}

main {
  display: block;
}

h1 {
  font-size: 2em;
  margin: 0.67em 0;
}

b, strong {
  font-weight: bolder;
}

small {
  font-size: 80%;
}

sub, sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub { bottom: -0.25em; }
sup { top: -0.5em; }

button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  line-height: 1.15;
  margin: 0;
}

button,
input {
  overflow: visible;
}

button,
select {
  text-transform: none;
}

button,
[type="button"],
[type="reset"],
[type="submit"] {
  appearance: auto;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
               Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.5;
  color: #1f2937;
  background-color: #fff;
  text-rendering: optimizelegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-weight: 600;
  line-height: 1.25;
  color: #111827;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

a {
  color: #3b82f6;
  text-decoration: none;
  transition: color 150ms ease;
}

a:hover {
  color: #1d4ed8;
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

ul, ol {
  margin-top: 0;
  margin-bottom: 1rem;
  padding-left: 2rem;
}

li {
  margin-bottom: 0.25rem;
}

dl {
  margin-top: 0;
  margin-bottom: 1rem;
}

dt {
  font-weight: 600;
}

dd {
  margin-left: 0;
  margin-bottom: 0.5rem;
}

blockquote {
  margin: 0 0 1rem;
  padding: 0.5rem 1rem;
  border-left: 4px solid #e5e7eb;
  background-color: #f9fafb;
  color: #4b5563;
}

blockquote p:last-child {
  margin-bottom: 0;
}

pre {
  margin-top: 0;
  margin-bottom: 1rem;
  padding: 1rem;
  background-color: #1f2937;
  color: #f3f4f6;
  border-radius: 0.5rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.5;
}

code {
  font-size: 0.875em;
  padding: 0.125rem 0.25rem;
  background-color: #f3f4f6;
  border-radius: 0.25rem;
  color: #ef4444;
}

pre code {
  padding: 0;
  background-color: transparent;
  color: inherit;
}

table {
  width: 100%;
  margin-bottom: 1rem;
  border-collapse: collapse;
  border-spacing: 0;
}

th, td {
  padding: 0.75rem;
  vertical-align: top;
  border-top: 1px solid #e5e7eb;
}

thead th {
  vertical-align: bottom;
  border-bottom: 2px solid #e5e7eb;
  font-weight: 600;
  text-align: left;
}

tbody + tbody {
  border-top: 2px solid #e5e7eb;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="url"],
input[type="tel"],
input[type="number"],
textarea,
select {
  display: block;
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  color: #1f2937;
  background-color: #fff;
  border: 1px solid #d1d5db;
  border-radius: 0.375rem;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

input:focus,
textarea:focus,
select:focus {
  border-color: #3b82f6;
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

input::placeholder,
textarea::placeholder {
  color: #9ca3af;
}

input:disabled,
input[readonly],
textarea:disabled,
textarea[readonly],
select:disabled {
  background-color: #f3f4f6;
  cursor: not-allowed;
}

:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* In your CSS */
.my-component {
  color: var(--color-primary);
  padding: var(--spacing-4);
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-md);
  border-radius: var(--border-radius-lg);
}

<!-- Inline styles -->
<div style="color: var(--color-primary); padding: var(--spacing-4);">
  Styled with design tokens
</div>