/* DMVPN teaching components layered over the unchanged OSPF lab shell. */
.dmvpn-hub-page .ospf-hub .welcome-section h1 {
    font-size: clamp(2.25rem, 4vw, 3.35rem);
    line-height: 1.1;
}

.dmvpn-hub-page .ospf-hub .welcome-section p {
    font-size: clamp(1.05rem, 1.35vw, 1.2rem);
    line-height: 1.65;
}

.dmvpn-hub-page .ospf-hub .menu-item :is(h2, h3) {
    font-size: clamp(1.35rem, 1.7vw, 1.7rem);
    line-height: 1.2;
    margin-bottom: 1rem;
}

.dmvpn-hub-page .ospf-article-card > h2,
.dmvpn-hub-page .ospf-article-card .ospf-hub-faq > h2 {
    font-size: clamp(1.45rem, 2vw, 2rem);
    line-height: 1.2;
    margin: 2.4rem 0 1rem;
}

.dmvpn-hub-page .ospf-article-card > h2:first-child {
    margin-top: 0;
}

.dmvpn-hub-page .ospf-article-card > p {
    font-size: 1rem;
    line-height: 1.7;
}

.dmvpn-hub-page .ospf-article-card .dmvpn-phase-strip {
    margin-bottom: 2.4rem;
}

.dmvpn-hub-page .ospf-article-card .dmvpn-phase-strip h3 {
    font-size: clamp(1.05rem, 1.25vw, 1.25rem);
    line-height: 1.3;
}

.dmvpn-series-page .blog-article .welcome-section h1 {
    font-size: clamp(1.85rem, 3.25vw, 2.8rem);
    line-height: 1.14;
    overflow-wrap: anywhere;
}

.dmvpn-series-page .blog-article .content-card h2 {
    font-size: clamp(1.4rem, 2.15vw, 2rem);
    line-height: 1.25;
}

.dmvpn-series-page .blog-article .content-card h3 {
    font-size: clamp(1.08rem, 1.5vw, 1.35rem);
    line-height: 1.3;
}

.dmvpn-series-page .dmvpn-phase-strip,
.dmvpn-series-page .dmvpn-topology,
.dmvpn-hub-page .dmvpn-phase-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.25rem;
}

.dmvpn-series-page .dmvpn-phase-strip > article,
.dmvpn-hub-page .dmvpn-phase-strip > article {
    background: color-mix(in srgb, var(--primary-color) 5%, var(--bg-secondary));
    border: 1px solid color-mix(in srgb, var(--primary-color) 28%, var(--border-color));
    border-radius: .8rem;
    flex: 1 1 15rem;
    min-width: 0;
    padding: 1rem;
}

.dmvpn-series-page .dmvpn-phase-strip h3,
.dmvpn-hub-page .dmvpn-phase-strip h3 {
    margin: 0 0 .65rem;
}

.dmvpn-series-page .dmvpn-phase-strip p,
.dmvpn-hub-page .dmvpn-phase-strip p {
    margin-bottom: 0;
}

.dmvpn-series-page .dmvpn-topology {
    align-items: stretch;
}

.dmvpn-series-page .dmvpn-node {
    align-items: center;
    background: color-mix(in srgb, var(--primary-color) 6%, var(--bg-secondary));
    border: 1px solid color-mix(in srgb, var(--primary-color) 30%, var(--border-color));
    border-radius: .8rem;
    display: flex;
    flex: 1 1 14rem;
    flex-direction: column;
    gap: .4rem;
    min-width: 0;
    padding: 1rem;
    text-align: center;
}

.dmvpn-series-page .dmvpn-node i {
    color: var(--primary-color);
    font-size: 1.45rem;
}

.dmvpn-series-page .dmvpn-node code {
    overflow-wrap: anywhere;
}

.dmvpn-series-page .dmvpn-diagram {
    background: color-mix(in srgb, var(--primary-color) 3%, var(--bg-card));
    border: 1px solid color-mix(in srgb, var(--primary-color) 24%, var(--border-color));
    border-radius: .9rem;
    box-shadow: 0 .65rem 1.6rem rgba(15, 23, 42, .08);
    margin: 1.25rem 0;
    overflow: hidden;
}

.dmvpn-series-page .dmvpn-diagram img {
    background: #fff;
    display: block;
    height: auto;
    width: 100%;
}

.dmvpn-series-page .dmvpn-diagram figcaption {
    color: var(--text-secondary);
    line-height: 1.65;
    padding: .9rem 1rem 1rem;
}

.dmvpn-series-page .dmvpn-diagram figcaption strong {
    color: var(--text-primary);
}

.dmvpn-series-page .dmvpn-vpn-diagram-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.dmvpn-series-page .dmvpn-vpn-diagram-grid .dmvpn-diagram {
    margin-block: 0;
}

.dmvpn-series-page .dmvpn-vpn-diagram-grid .dmvpn-diagram img {
    margin-inline: auto;
    max-width: 100%;
    width: auto;
}

.dmvpn-series-page .dmvpn-flow {
    background: color-mix(in srgb, var(--accent-color) 9%, var(--bg-secondary));
    border-inline-start: 4px solid var(--accent-color);
    border-radius: .65rem;
    margin-top: 1.25rem;
    padding: 1rem 1.1rem;
}

.dmvpn-series-page .dmvpn-flow p:last-child,
.dmvpn-series-page .dmvpn-evidence p:last-child {
    margin-bottom: 0;
}

.dmvpn-series-page .dmvpn-evidence {
    background: color-mix(in srgb, var(--primary-color) 4%, var(--bg-secondary));
    border: 1px dashed color-mix(in srgb, var(--primary-color) 48%, var(--border-color));
    border-radius: .8rem;
    margin-top: 1.25rem;
    padding: 1rem;
}

.dmvpn-series-page .dmvpn-evidence-grid {
    display: grid;
    gap: .75rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 1rem;
}

.dmvpn-series-page .dmvpn-evidence-grid > div {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: .65rem;
    padding: .8rem;
}

.dmvpn-series-page .dmvpn-evidence-grid strong,
.dmvpn-series-page .dmvpn-evidence-grid span {
    display: block;
}

.dmvpn-series-page .dmvpn-evidence-grid span {
    color: var(--text-secondary);
    font-size: .92rem;
    margin-top: .25rem;
}

.dmvpn-series-page .dmvpn-side-menu {
    max-height: min(62vh, 34rem);
    overflow-y: auto;
    scrollbar-width: thin;
}

@media (max-width: 760px) {
    .dmvpn-hub-page .ospf-hub .welcome-section h1,
    .dmvpn-series-page .blog-article .welcome-section h1 {
        font-size: clamp(1.65rem, 8vw, 2.1rem);
    }

    .dmvpn-hub-page .ospf-article-card > h2,
    .dmvpn-hub-page .ospf-article-card .ospf-hub-faq > h2 {
        font-size: 1.45rem;
        margin-top: 2rem;
    }

    .dmvpn-series-page .dmvpn-phase-strip,
    .dmvpn-series-page .dmvpn-topology,
    .dmvpn-hub-page .dmvpn-phase-strip {
        gap: .8rem;
    }

    .dmvpn-series-page .dmvpn-phase-strip > article,
    .dmvpn-series-page .dmvpn-node,
    .dmvpn-hub-page .dmvpn-phase-strip > article {
        flex-basis: 100%;
    }

    .dmvpn-series-page .dmvpn-evidence-grid {
        grid-template-columns: 1fr;
    }

    .dmvpn-series-page .dmvpn-vpn-diagram-grid {
        grid-template-columns: 1fr;
    }
}