/* Utility Classes (Phase 1 minimal set) */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); border: 0; }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.justify-center { justify-content: center; }
.items-center { align-items: center; }
.grid { display: grid; }
.text-center { text-align: center; }
.max-width-prose { max-width: 70ch; }

/* Gap scale */
.gap-xs { gap: var(--space-2); }
.gap-sm { gap: var(--space-3); }
.gap-md { gap: var(--space-4); }
.gap-lg { gap: var(--space-5); }
.gap-xl { gap: var(--space-6); }

/* Padding scale */
.pad-sm { padding: var(--space-3); }
.pad-md { padding: var(--space-4); }
.pad-lg { padding: var(--space-5); }

/* Stack layout (vertical rhythm) */
.l-stack > * + * { margin-top: var(--space-4); }

/* Width constraints */
.l-full { width: 100%; }
.l-constrain { max-width: var(--site-max-width); margin-inline: auto; padding-inline: var(--space-4); }
