.is-private-surface {
    background: linear-gradient(180deg, #f5efeb 0%, #fbf8f6 100%);
}

.app-shell {
    display: grid;
    grid-template-columns: 290px 1fr;
    min-height: calc(100vh - 88px);
}

.app-shell__sidebar {
    padding: 1.5rem;
    border-right: 1px solid var(--zv-border);
    background: rgba(255,255,255,0.72);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 88px;
    height: calc(100vh - 88px);
}

.app-shell__nav {
    display: grid;
    gap: 0.55rem;
    margin-top: 1rem;
}

.app-shell__nav a {
    display: block;
    padding: 0.85rem 1rem;
    border-radius: 14px;
    color: var(--zv-ink);
    background: rgba(245,239,235,0.65);
    border: 1px solid rgba(29,23,34,0.06);
    font-weight: 600;
}

.app-shell__nav a:hover {
    background: rgba(215,124,136,0.14);
}

.app-shell__content {
    padding: 1.5rem;
    display: grid;
    gap: 1rem;
}

.app-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.app-toolbar__toggle {
    display: none;
}

.app-toolbar__meta {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.app-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.app-card {
    min-height: 180px;
}

.app-card--wide {
    grid-column: span 2;
}

.mock-feed {
    display: grid;
    gap: 0.85rem;
    margin-top: 1rem;
}

.mock-feed article {
    padding: 1rem;
    border-radius: 16px;
    background: rgba(245,239,235,0.75);
    border: 1px solid rgba(29,23,34,0.06);
}

.page-entry--app {
    max-width: none;
    margin-inline: 0;
}

@media (max-width: 1080px) {
    .hero__grid,
    .split-highlight,
    .content-grid,
    .auth-shell,
    .auth-shell--wide,
    .site-footer__grid,
    .app-shell {
        grid-template-columns: 1fr;
    }

    .feature-grid,
    .pricing-grid,
    .quote-grid,
    .post-grid,
    .app-dashboard-grid {
        grid-template-columns: 1fr 1fr;
    }

    .app-card--wide {
        grid-column: auto;
    }

    .app-shell__sidebar {
        position: fixed;
        inset: 88px auto 0 0;
        width: min(320px, 86vw);
        transform: translateX(-100%);
        transition: transform .25s ease;
        z-index: 40;
    }

    .app-shell.is-sidebar-open .app-shell__sidebar {
        transform: translateX(0);
    }

    .app-toolbar__toggle {
        display: inline-flex;
    }
}

@media (max-width: 820px) {
    .site-header__toggle {
        display: inline-flex;
    }

    .site-nav {
        position: fixed;
        inset: 88px 1rem auto 1rem;
        display: none;
        flex-direction: column;
        align-items: stretch;
        background: rgba(255,255,255,0.96);
        border: 1px solid var(--zv-border);
        border-radius: 22px;
        box-shadow: var(--zv-shadow);
        padding: 1rem;
    }

    .site-nav.is-open {
        display: flex;
    }

    .site-nav__menu,
    .site-nav__actions,
    .callout,
    .site-footer__bottom {
        flex-direction: column;
        align-items: stretch;
    }

    .feature-grid,
    .pricing-grid,
    .quote-grid,
    .post-grid,
    .app-dashboard-grid {
        grid-template-columns: 1fr;
    }

    .section-space {
        padding: 3.5rem 0;
    }

    .hero__content h1 {
        font-size: clamp(2.5rem, 10vw, 4rem);
    }
}