/* Explain: App-specific layout utilities (container, section, header, footer). */
.aa-container {
    width: 100%;
    max-width: 74rem;
    margin-inline: auto;
    padding-inline: 1.25rem;
}

.aa-section {
    padding-block: 5rem;
}

@media (min-width: 768px) {
    .aa-section {
        padding-block: 6.5rem;
    }
}

.aa-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(251, 247, 243, 0.9);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-soft);
}

.aa-nav-link {
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding-block: 0.4rem;
    transition: color 0.25s ease;
}

.aa-nav-link:hover {
    color: var(--primary-color);
}

.aa-nav-active {
    color: var(--primary-color);
}

.aa-mobile-menu {
    background: rgba(251, 247, 243, 0.99);
    border-top: 1px solid var(--border-soft);
}

.aa-nav-link-mobile {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding-block: 0.7rem;
    font-size: 0.85rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-soft);
    transition: color 0.25s ease;
}

.aa-nav-link-mobile:hover {
    color: var(--primary-color);
}

.aa-footer {
    border-top: 1px solid var(--border-color);
    background: var(--surface-soft);
}

.aa-footer-link {
    display: block;
    padding-block: 0.35rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color 0.25s ease;
}

.aa-footer-link:hover {
    color: var(--primary-color);
}