/* layout.css — container, section rhythm and surfaces, section heads, grids, flow */

.container {
    inline-size: 100%;
    max-inline-size: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.container--narrow { max-inline-size: var(--container-narrow); }

/* Sections — every zone above the footer is light (prompt §5.1.4) */
.section { padding-block: var(--space-2xl); }
.section--white { background-color: var(--color-bg); }
.section--cream { background-color: var(--color-surface); }
.section--sand  { background-color: var(--color-surface-sand); }
.section--gold  { background-color: var(--color-surface-gold); }

/* Section head — kicker, title, lead */
.section-head {
    max-inline-size: var(--container-narrow);
    margin-block-end: var(--space-2xl);
}

.section-head--center {
    margin-inline: auto;
    text-align: center;
}

.section-head__title { margin-block-start: var(--space-sm); }

.section-head__lead {
    font-family: var(--font-heading);
    margin-block-start: var(--space-md);
    max-inline-size: var(--measure);
    text-wrap: balance;
}

.section-head--center .section-head__lead { margin-inline: auto; }

.section-foot {
    margin-block-start: var(--space-2xl);
    text-align: center;
}

/* Grid — mobile-first (engineering §6 pattern, §8 ladder) */
.grid-3 {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-lg);
}

/* Flow spacing */
.flow > * + * { margin-block-start: var(--space-md); }

@media (min-width: 768px) {
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 992px) {
    .section { padding-block: calc(var(--space-3xl) + var(--space-xl)); }
    .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}