.page-shell {
    max-width: 1480px;
    margin: 0 auto;
    padding: 0 10px 28px;
    display: grid;
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    position: relative;
    z-index: 1;
}

.page-shell.nav-collapsible {
    --page-nav-column-width: 220px;
    --page-nav-gap: 18px;
    --page-nav-toggle-size: 36px;
    --page-nav-collapsed-width: 16px;
    grid-template-columns: var(--page-nav-column-width) minmax(0, 1fr);
    gap: var(--page-nav-gap);
    transition: grid-template-columns .22s ease, gap .22s ease;
}

.page-shell.nav-collapsible.nav-collapsed {
    grid-template-columns: var(--page-nav-collapsed-width) minmax(0, 1fr);
    gap: 0;
}

.page-shell .page {
    min-width: 0;
    max-width: none;
    margin: 0;
}

.side-nav-slot {
    min-width: 0;
}

.side-nav-clip {
    min-width: 0;
}

.page-shell.nav-collapsible .side-nav-slot {
    position: sticky;
    top: clamp(12px, calc(50vh - 220px), 132px);
    align-self: start;
    height: calc(100vh - clamp(12px, calc(50vh - 220px), 132px));
    display: flex;
    align-items: center;
}

.page-shell.nav-collapsible .side-nav-clip {
    width: 100%;
    display: flex;
    align-items: center;
}

[data-nav-section] {
    scroll-margin-top: 26px;
}

.side-nav {
    position: sticky;
    top: calc(env(safe-area-inset-top) + 12px);
    max-height: calc(100vh - 32px);
    overflow: auto;
    padding: 12px;
    border-radius: 20px;
    border: 1px solid rgba(154, 65, 19, .12);
    background: rgba(255, 255, 255, .92);
    box-shadow: 0 12px 24px rgba(17, 16, 15, .08);
}

.page-shell.nav-collapsible .side-nav {
    position: relative;
    top: auto;
    width: var(--page-nav-column-width);
    max-width: var(--page-nav-column-width);
    max-height: min(720px, calc(100vh - 32px));
    transition: transform .22s ease, opacity .18s ease, box-shadow .22s ease;
}

.page-shell.nav-collapsible.nav-collapsed .side-nav {
    transform: translateX(calc(-100% - 24px));
    opacity: 0;
    pointer-events: none;
    box-shadow: none;
}

.side-nav-head {
    margin-bottom: 12px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.nav-brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #d56b2d 0%, #b84f1d 100%);
    color: #fff;
    font-size: 13px;
    font-weight: 900;
    letter-spacing: .08em;
    flex: none;
}

.nav-brand-copy {
    min-width: 0;
}

.nav-brand-copy strong,
.nav-link-copy strong {
    display: block;
    font-size: 13px;
    line-height: 1.4;
}

.nav-brand-copy span,
.nav-link-copy small,
.nav-foot-title {
    display: block;
    margin-top: 3px;
    color: var(--muted, #5f5348);
    font-size: 11px;
    line-height: 1.5;
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 9px;
    min-height: 52px;
    padding: 9px 10px;
    border-radius: 14px;
    text-decoration: none;
    background: rgba(255, 255, 255, .7);
    border: 1px solid rgba(154, 65, 19, .08);
}

.nav-link:hover {
    background: rgba(255, 255, 255, .88);
    border-color: rgba(154, 65, 19, .16);
}

.nav-link.active {
    background: rgba(213, 107, 45, .12);
    border-color: rgba(154, 65, 19, .2);
}

.nav-link-badge {
    width: 36px;
    min-width: 36px;
    height: 36px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(154, 65, 19, .08);
    color: var(--accent-deep, #7d3e18);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .08em;
}

.nav-link.active .nav-link-badge {
    background: linear-gradient(135deg, #d56b2d 0%, #b84f1d 100%);
    color: #fff;
}

.nav-link-copy {
    min-width: 0;
}

.nav-foot {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed rgba(154, 65, 19, .14);
}

.nav-foot-tags {
    margin-top: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.nav-foot-tags span {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 4px 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .74);
    border: 1px solid rgba(154, 65, 19, .1);
    color: var(--accent-deep, #7d3e18);
    font-size: 10px;
    font-weight: 800;
}

.nav-toggle {
    display: none;
}

.page-shell.nav-collapsible .nav-toggle {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translate(50%, -50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: var(--page-nav-toggle-size);
    min-width: var(--page-nav-toggle-size);
    height: calc(var(--page-nav-toggle-size) + 14px);
    padding: 0 8px;
    border: 1px solid rgba(154, 65, 19, .18);
    border-radius: 999px;
    background: rgba(255, 255, 255, .96);
    color: var(--accent-deep, #7d3e18);
    box-shadow: 0 12px 24px rgba(17, 16, 15, .12);
    cursor: pointer;
    z-index: 3;
    transition: transform .2s ease, box-shadow .2s ease, opacity .18s ease;
}

.page-shell.nav-collapsible .nav-toggle:hover:not(:disabled) {
    transform: translate(50%, -50%) scale(1.02);
    box-shadow: 0 16px 28px rgba(17, 16, 15, .16);
}

.page-shell.nav-collapsible .nav-toggle:focus-visible {
    outline: 2px solid rgba(213, 107, 45, .48);
    outline-offset: 2px;
}

.nav-toggle-icon::before {
    content: "<";
    display: block;
    font-size: 18px;
    line-height: 1;
    font-weight: 900;
}

.nav-toggle-text {
    display: none;
}

.page-shell.nav-collapsible .nav-toggle.is-collapsed .nav-toggle-icon::before {
    content: ">";
}

.page-shell.nav-collapsible .nav-toggle.is-locked {
    cursor: not-allowed;
    opacity: .68;
}

.page-shell.nav-collapsible.nav-collapsed .nav-toggle {
    transform: translate(0, -50%);
}

.page-shell.nav-collapsible.nav-collapsed .nav-toggle:hover:not(:disabled) {
    transform: translate(0, -50%) scale(1.02);
}

.page-nav-backdrop,
.nav-fab {
    display: none;
}

@media (max-width: 1080px) {
    .page-shell {
        display: block;
        max-width: none;
        padding: 0;
    }

    .page-shell .page {
        padding-top: 0;
    }

    .page-shell.nav-collapsible,
    .page-shell.nav-collapsible.nav-collapsed {
        grid-template-columns: none;
        gap: 0;
    }

    .side-nav-slot,
    .page-shell.nav-collapsible .side-nav-slot {
        position: fixed;
        inset: 0 auto 0 0;
        width: min(88vw, 360px);
        max-width: calc(100vw - 42px);
        z-index: 1600;
        padding: max(12px, env(safe-area-inset-top)) 10px max(12px, env(safe-area-inset-bottom));
        transform: translateX(calc(-100% - 18px));
        opacity: 0;
        visibility: hidden;
        transition: transform .22s ease, opacity .18s ease, visibility .18s ease;
        pointer-events: none;
    }

    .page-shell.nav-mobile-open .side-nav-slot {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .side-nav-clip,
    .page-shell.nav-collapsible .side-nav-clip {
        height: 100%;
        align-items: stretch;
    }

    .side-nav {
        position: relative;
        top: auto;
        transform: none;
        height: 100%;
        max-height: none;
        overflow: auto;
        margin-bottom: 0;
        padding: 12px;
        z-index: 1;
        box-shadow: 0 24px 56px rgba(17, 16, 15, .2);
    }

    .side-nav-head {
        margin-bottom: 10px;
    }

    .page-shell.nav-collapsible .side-nav {
        width: auto;
        max-width: none;
        opacity: 1;
        pointer-events: auto;
        box-shadow: 0 12px 24px rgba(17, 16, 15, .08);
    }

    .page-shell.nav-collapsible .nav-toggle {
        display: none;
    }

    .page-nav-backdrop {
        position: fixed;
        inset: 0;
        z-index: 1598;
        display: block;
        background: rgba(18, 14, 10, .38);
        opacity: 0;
        pointer-events: none;
        transition: opacity .18s ease;
        backdrop-filter: blur(3px);
    }

    .page-shell.nav-mobile-open .page-nav-backdrop {
        opacity: 1;
        pointer-events: auto;
    }

    .nav-fab {
        position: fixed;
        top: max(12px, env(safe-area-inset-top));
        right: 12px;
        z-index: 1599;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        box-sizing: border-box;
        width: auto;
        min-width: 68px;
        max-width: calc(100vw - 24px);
        height: 42px;
        min-height: 42px;
        margin: 0;
        padding: 0 14px;
        border: 1px solid rgba(154, 65, 19, .18);
        border-radius: 999px;
        background: rgba(255, 255, 255, .96);
        color: var(--accent-deep, #7d3e18);
        box-shadow: 0 14px 28px rgba(17, 16, 15, .16);
        font: inherit;
        font-size: 13px;
        font-weight: 900;
        letter-spacing: 0;
        cursor: pointer;
    }

    .nav-fab:focus-visible {
        outline: 2px solid rgba(213, 107, 45, .48);
        outline-offset: 2px;
    }

    .nav-fab:disabled {
        cursor: not-allowed;
        opacity: .68;
    }

    .nav-brand-mark {
        width: 38px;
        height: 38px;
        border-radius: 12px;
    }

    .nav-brand-copy span {
        display: none;
    }

    .nav-links {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        gap: 8px;
    }

    .nav-link {
        min-height: 50px;
        padding: 8px 9px;
    }

    .nav-link-copy small {
        display: none;
    }

    .nav-foot {
        margin-top: 10px;
        padding-top: 10px;
    }
}

@media (max-width: 560px) {
    .page-shell {
        padding: 0;
    }

    .side-nav-slot,
    .page-shell.nav-collapsible .side-nav-slot {
        width: min(92vw, 340px);
        max-width: calc(100vw - 34px);
        padding: max(10px, env(safe-area-inset-top)) 8px max(10px, env(safe-area-inset-bottom));
    }

    .side-nav {
        border-radius: 16px;
    }

    .nav-links {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .nav-link {
        gap: 8px;
        min-height: 48px;
    }

    .nav-link-badge {
        width: 32px;
        min-width: 32px;
        height: 32px;
        border-radius: 10px;
        font-size: 10px;
    }
}