/* ==========================================================================
   Layout System — Containers, Grid, Utilities
   ========================================================================== */

/* --- Containers --- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

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

.container--wide {
    max-width: var(--container-wide);
}

/* --- Site Main --- */
.site-main {
    padding-top: var(--space-8);
    padding-bottom: var(--space-16);
}

.site-main--single {
    padding-top: 0;
}

/* --- Article Grid --- */
.article-grid {
    display: grid;
    gap: var(--space-8);
}

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

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

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

/* --- Section Spacing --- */
.section {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
}

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

.section__header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.section__title {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-2);
}

.section__subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-light);
}

/* --- Flex Utilities --- */
.flex {
    display: flex;
}

.flex--center {
    align-items: center;
    justify-content: center;
}

.flex--between {
    align-items: center;
    justify-content: space-between;
}

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

/* --- Two Column Layout (content + sidebar) --- */
.layout-sidebar {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--space-10);
    align-items: start;
}

/* --- Text Utilities --- */
.text-center { text-align: center; }
.text-sm { font-size: var(--text-sm); }
.text-light { color: var(--color-text-light); }