:root {
  --sb-color-text: #1f2937;
  --sb-color-bg: #ffffff;
  --sb-color-primary: #2563eb;
  --sb-color-muted: #6b7280;
  --sb-color-border: #d1d5db;
  --sb-color-focus: #f59e0b;
  --sb-space-sm: 0.75rem;
  --sb-space-md: 1.5rem;
  --sb-space-lg: 3rem;
  --sb-max-width: 72rem;
  --sb-font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --sb-font-heading: inherit;
}

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

html {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--sb-color-text);
  background: var(--sb-color-bg);
  font-family: var(--sb-font-body);
}

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

a {
  color: var(--sb-color-primary);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--sb-color-focus);
  outline-offset: 2px;
}

.site-shell {
  width: min(100% - 2rem, var(--sb-max-width));
  margin-inline: auto;
}

.site-main {
  padding-block: var(--sb-space-lg);
}

.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.screen-reader-text:focus {
  position: fixed;
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  margin: 0;
  padding: 0.5rem 0.75rem;
  background: #fff;
  clip: auto;
}