@media (max-width: 980px) {
    .portal-layout-grid {
        grid-auto-rows: auto;
    }
    .portal-layout-block {
        grid-column: 1 / -1 !important;
        grid-row: auto !important;
    }
}

@media (max-width: 640px) {
    .site-topbar { padding: calc(10px + env(safe-area-inset-top)) 0 10px; }
    .site-topbar-inner {
        width: min(100% - 24px, 520px);
        min-height: 42px;
        gap: 10px;
    }
    .site-brand { gap: 8px; }
    .site-brand img {
        width: 32px;
        height: 32px;
        flex-basis: 32px;
        border-radius: 10px;
    }
    .site-brand span { font-size: 19px; }
    .site-nav {
        justify-content: flex-start;
        max-width: 52vw;
    }
    .site-nav a {
        min-height: 34px;
        padding: 0 12px;
        font-size: 12px;
    }
    .site-back-link {
        min-height: 34px;
        padding: 0 13px;
        font-size: 12px;
    }
    .portal-shell { width: min(100% - 24px, 520px); padding-top: calc(78px + env(safe-area-inset-top)); }
    .topbar { align-items: stretch; flex-direction: column; }
    .brand-mark { font-size: 22px; }
    .quick-nav { display: grid; grid-template-columns: 1fr 1fr; }
    .portal-block-section-header {
        min-height: auto;
        padding: 10px 0 0;
    }
    .portal-block-section-header .section-header-card {
        min-height: auto;
        height: auto;
        padding: 2px 0 2px 14px;
        border: 0;
        border-left: 4px solid #2f8be6;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
        overflow: visible;
    }
    .portal-block-section-header .eyebrow {
        margin-bottom: 5px;
        color: #68717a;
        font-size: 11px;
    }
    .portal-block-section-header .section-header-card h2 {
        font-size: 22px;
        line-height: 1.18;
    }
    .profile-card,
    .hello-card,
    .updates-panel { padding: 24px; }
    .portrait { width: 148px; height: 148px; flex-basis: 148px; font-size: 58px; }
    .portal-block-feature_link { min-height: clamp(180px, calc(var(--block-grid-h, 4) * 82px), 330px); }
    .portal-block-photo_library { min-height: 360px; }
    .portal-block-blog {
        min-height: 0;
        overflow: hidden;
        border-radius: 24px;
        clip-path: inset(0 round 24px);
    }
    .portal-block-presentation {
        min-height: 0;
        overflow: hidden;
        border-radius: 24px;
    }
    .presentation-home-card {
        height: auto;
        grid-template-columns: 1fr;
    }
    .presentation-home-card > img {
        min-height: 0;
        aspect-ratio: 16 / 9;
    }
    .presentation-home-content { padding: 22px; }
    .presentation-home-content h2 { margin-bottom: 12px; }
    .portal-block-blog .blog-latest-card {
        aspect-ratio: 2 / 3;
        height: auto;
        min-height: 0;
        overflow: hidden;
        border-radius: 24px;
        clip-path: inset(0 round 24px);
        -webkit-mask-image: -webkit-radial-gradient(white, black);
    }
    .portal-block-preview_link { min-height: 220px; }
    .portal-block-social_link { min-height: 104px; }
    .portal-block-site-header { min-height: 104px; }
    .feature-content { padding: 20px; }
    .portal-block-feature_link .feature-content {
        padding: 14px 16px;
    }
    .portal-block-feature_link .card-topline {
        max-width: 100%;
        margin-bottom: 7px;
        padding: 5px 8px;
        overflow: hidden;
        font-size: 10px;
        line-height: 1.2;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .portal-block-feature_link .feature-card h2 {
        margin-bottom: 0;
        font-size: clamp(22px, 7vw, 28px);
        line-height: 1.08;
    }
    .portal-block-feature_link .feature-card p,
    .portal-block-feature_link .card-link {
        display: none;
    }
    .photo-library-card { padding: 0; }
    .photo-library-head {
        align-items: flex-start;
        padding: 20px;
    }
    .photo-library-head h2 {
        font-size: clamp(24px, 8vw, 34px);
    }
    .photo-library-collage {
        min-height: 330px;
        grid-template-columns: minmax(0, 1fr) 112px;
    }
    .photo-library-main {
        min-height: 330px;
        aspect-ratio: auto;
    }
    .photo-library-strip {
        grid-template-columns: none;
        grid-template-rows: repeat(3, minmax(0, 1fr));
    }
    .photo-library-thumb {
        aspect-ratio: 1 / 1;
        height: 100%;
        background-size: contain;
    }
    .photo-library-thumb.is-landscape {
        background-size: 138% auto;
    }
    .photo-library-thumb.is-portrait {
        background-size: auto 138%;
    }
    .photo-library-collage.is-main-landscape {
        grid-template-columns: 1fr;
        grid-template-rows: auto minmax(104px, 1fr);
    }
    .photo-library-collage.is-main-landscape .photo-library-main {
        aspect-ratio: 16 / 9;
        height: auto;
        min-height: 0;
    }
    .photo-library-collage.is-main-landscape .photo-library-strip {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        grid-template-rows: 1fr;
    }
    .photo-library-collage.is-main-landscape .photo-library-thumb {
        background-size: cover;
    }
    .blog-latest-card > img {
        height: 100%;
        min-height: 0;
        border-radius: inherit;
        filter: none;
        object-fit: contain;
        object-position: center top;
    }
    .blog-latest-card::after {
        border-radius: inherit;
    }
    .blog-latest-overlay {
        padding: 20px;
    }
    .blog-page-shell {
        width: min(100% - 24px, 560px);
        padding-top: calc(88px + env(safe-area-inset-top));
    }
    .blog-list-shell {
        width: min(100% - 24px, 560px);
        padding-top: calc(88px + env(safe-area-inset-top));
    }
    .blog-list-header {
        grid-template-columns: 1fr;
        margin-bottom: 18px;
    }
    .blog-list-header h1 {
        grid-column: 1;
        grid-row: 2;
        font-size: 48px;
    }
    .blog-sort-tabs {
        grid-column: 1;
        grid-row: 3;
        justify-self: stretch;
        margin-top: 12px;
    }
    .blog-sort-tabs a {
        flex: 1;
        padding: 0 10px;
    }
    .blog-tag-browser {
        width: calc(100% + 24px);
        margin: 0 -12px 18px;
        padding: 14px 12px;
        border-radius: 0;
    }
    .blog-tag-browser-header {
        padding: 0 2px;
    }
    .blog-tag-nav {
        flex-wrap: nowrap;
        gap: 7px;
        padding: 0 2px 4px;
        overflow-x: auto;
        overflow-y: hidden;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }
    .blog-tag-nav::-webkit-scrollbar {
        display: none;
    }
    .blog-tag-nav a {
        flex: 0 0 auto;
        white-space: nowrap;
    }
    .blog-list-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }
    .blog-list-card {
        border-radius: 12px;
    }
    .blog-list-card-overlay {
        gap: 5px;
        padding: 36px 8px 8px;
    }
    .blog-list-card .blog-tag-list {
        gap: 4px;
    }
    .blog-list-card .blog-tag-chip {
        min-height: 20px;
        padding: 0 6px;
        font-size: 10px;
    }
    .blog-article {
        border-radius: 18px;
    }
    .blog-article-header {
        padding: 24px 18px 16px;
    }
    .blog-article-header h1 {
        font-size: clamp(30px, 9vw, 42px);
    }
    .blog-article-media {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 10px;
        padding: 0 18px 22px;
    }
    .blog-article-image {
        border-radius: 14px;
    }
    .blog-article-meta {
        gap: 14px;
        padding-top: 0;
    }
    .blog-article-meta-section {
        gap: 7px;
    }
    .blog-article-author {
        font-size: 12px;
        line-height: 1.45;
    }
    .blog-article-author span {
        margin-bottom: 2px;
        font-size: 10px;
    }
    .blog-article-summary-count {
        font-size: 13px;
    }
    .blog-article-summary-reading {
        font-size: 11px;
        line-height: 1.5;
    }
    .blog-article-date-row {
        gap: 7px;
        margin-bottom: 0;
    }
    .blog-article-date-pill {
        min-height: 30px;
        gap: 6px;
        padding: 0 9px;
        font-size: 11px;
    }
    .blog-article-date-pill span {
        font-size: 10px;
    }
    .blog-article-tags {
        margin-top: 0;
    }
    .blog-article-tags .blog-tag-chip {
        min-height: 22px;
        padding: 0 7px;
        font-size: 10px;
    }
    .blog-article-body {
        padding: 24px 22px 30px;
        font-size: 16px;
    }
    .blog-related {
        padding: 0 18px 30px;
    }
    .blog-related-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 10px;
    }
    .blog-related-header h2 {
        font-size: 20px;
    }
    .blog-related-card a {
        grid-template-columns: 56px minmax(0, 1fr);
        min-height: 84px;
        padding: 9px;
    }
    .blog-related-card img {
        height: 66px;
        border-radius: 10px;
    }
    .blog-related-presentation-card a {
        grid-template-columns: minmax(96px, 36%) minmax(0, 1fr);
    }
    .blog-related-presentation-card img {
        width: 100%;
        height: auto;
        aspect-ratio: 16 / 9;
    }
    .photo-page-shell {
        width: min(100% - 24px, 560px);
        padding-top: calc(88px + env(safe-area-inset-top));
    }
    .photo-page-header {
        margin-bottom: 18px;
    }
    .photo-page-header h1 {
        font-size: 48px;
    }
    .photo-tag-filter {
        gap: 6px;
        margin-top: 13px;
    }
    .photo-tag-filter a {
        min-height: 29px;
        padding: 4px 9px;
        font-size: 11px;
    }
    .photo-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 5px;
    }
    .photo-modal-nav {
        width: 38px;
        height: 48px;
        font-size: 30px;
        background: rgba(255, 255, 255, .62);
    }
    .photo-modal {
        width: 100vw;
        max-width: 100vw;
        height: 100dvh;
        max-height: 100dvh;
        margin: 0;
        border-radius: 0;
    }
    .photo-modal img {
        width: 100vw;
        height: 100dvh;
        max-height: 100dvh;
        object-fit: contain;
    }
    .photo-modal.is-portrait img {
        height: 100dvh;
        object-fit: contain;
        object-position: center;
    }
    .photo-modal footer {
        position: absolute;
        right: 0;
        bottom: 0;
        left: 0;
        z-index: 2;
        grid-template-columns: minmax(0, 1fr);
        gap: 5px;
        min-height: 58px;
        padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
        background: linear-gradient(to top, rgba(17, 17, 17, .88), rgba(17, 17, 17, .18));
        transition: opacity 160ms ease, transform 160ms ease;
    }
    .photo-modal footer time {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .photo-modal footer p {
        max-height: min(9em, 28dvh);
        padding-right: 4px;
    }
    .photo-modal-tags {
        grid-column: 1;
    }
    .photo-modal.is-zoomed footer {
        opacity: 0;
        pointer-events: none;
        transform: translateY(12px);
    }
    .photo-modal-prev { left: 8px; }
    .photo-modal-next { right: 8px; }
}

@media (max-width: 339px) {
    .blog-list-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .blog-list-card {
        border-radius: 14px;
    }
    .blog-list-card-overlay {
        gap: 7px;
        padding: 46px 12px 12px;
    }
    .blog-list-card .blog-tag-list {
        gap: 6px;
    }
    .blog-list-card .blog-tag-chip {
        min-height: 24px;
        padding: 0 9px;
        font-size: 12px;
    }
}