.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-narrow {
  max-width: 800px;
}

.container-wide {
  max-width: 1440px;
}



.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section-lg {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
}

.section-sm {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section-hero {
  padding-top: var(--space-24);
  padding-bottom: var(--space-16);
}


.section-surface {
  background-color: var(--color-surface);
}

.section-surface-bright {
  background-color: var(--color-surface-bright);
}

.section-surface-container {
  background-color: var(--color-surface-container);
}

.section-surface-high {
  background-color: var(--color-surface-container-high);
}

.section-surface-highest {
  background-color: var(--color-surface-container-highest);
}

.section-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

.section-secondary {
  background-color: var(--color-secondary);
  color: var(--color-on-secondary);
}



.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-gap-sm { gap: var(--space-4); }
.grid-gap-md { gap: var(--space-6); }
.grid-gap-lg { gap: var(--space-8); }



.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

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

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

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }



.stack {
  display: flex;
  flex-direction: column;
}

.stack > * + * {
  margin-top: var(--space-4);
}

.stack-sm > * + * { margin-top: var(--space-2); }
.stack-md > * + * { margin-top: var(--space-4); }
.stack-lg > * + * { margin-top: var(--space-6); }
.stack-xl > * + * { margin-top: var(--space-8); }



.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}



.center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.center-narrow {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}



.cols-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
  align-items: center;
}

.cols-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.cols-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}


.cols-alternate {
  display: grid;
  gap: var(--space-12);
}

.cols-alternate > * {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

.cols-alternate > *:nth-child(odd) {
  grid-template-columns: 1fr 1fr;
}

.cols-alternate > *:nth-child(even) {
  grid-template-columns: 1fr 1fr;
}



.with-sidebar {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: var(--space-12);
}

.sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-6));
  height: fit-content;
}



.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }



.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

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



.z-base { z-index: var(--z-base); }
.z-dropdown { z-index: var(--z-dropdown); }
.z-sticky { z-index: var(--z-sticky); }
.z-fixed { z-index: var(--z-fixed); }
.z-modal { z-index: var(--z-modal); }
.z-tooltip { z-index: var(--z-tooltip); }