.admin-shell {
    --admin-nav-width: 284px;
    --admin-nav-bg: #1f343f;
    --admin-nav-panel: #29434e;
    --admin-nav-line: rgba(220, 233, 235, .12);
    --admin-nav-text: #edf4f5;
    --admin-nav-muted: #9fb2b9;
    --admin-nav-accent: #79acab;
    display: grid;
    grid-template-columns: var(--admin-nav-width) minmax(0, 1fr);
    align-items: stretch;
    min-height: 100vh;
    background: var(--lab-fog, #f4f7f8);
    color: var(--lab-ink, #263b4a);
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    transition: grid-template-columns 180ms ease;
}

.admin-shell.is-collapsed { --admin-nav-width: 80px; }
.admin-shell *, .admin-shell *::before, .admin-shell *::after { box-sizing: border-box; }

.admin-navigation {
    position: sticky;
    top: 0;
    z-index: 1050;
    width: var(--admin-nav-width);
    height: 100vh;
    min-height: 590px;
    display: flex;
    flex-direction: column;
    overflow: visible;
    border-right: 1px solid #172a33;
    background: var(--admin-nav-bg);
    color: var(--admin-nav-text);
    transition: width 180ms ease, transform 180ms ease;
}

.admin-nav-brand-row {
    min-height: 78px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 15px 16px 20px;
}

.admin-nav-brand {
    min-width: 0;
    flex: 1;
    display: flex;
    align-items: center;
    color: var(--admin-nav-text);
    text-decoration: none;
}

.admin-nav-logo-full { display: block; width: 136px; height: auto; object-fit: contain; }
.admin-nav-logo-compact { display: none; width: 36px; height: 36px; object-fit: contain; }

.admin-nav-collapse,
.admin-nav-mobile-close {
    width: 34px;
    height: 34px;
    flex: 0 0 34px;
    display: grid;
    place-items: center;
    border: 1px solid transparent;
    border-radius: 9px;
    background: var(--admin-nav-panel);
    color: var(--admin-nav-muted);
    cursor: pointer;
    transition: color 140ms ease, background 140ms ease, border-color 140ms ease;
}

.admin-nav-collapse:hover,
.admin-nav-mobile-close:hover {
    border-color: rgba(220, 233, 235, .18);
    background: #31505b;
    color: white;
}

.admin-nav-collapse:focus-visible,
.admin-nav-mobile-close:focus-visible,
.admin-nav-mobile-trigger:focus-visible,
.admin-nav-link:focus-visible,
.admin-nav-tools button:focus-visible,
.admin-nav-profile:focus-visible,
.admin-nav-popover button:focus-visible {
    outline: 0 !important;
    box-shadow: 0 0 0 3px rgba(121, 172, 171, .26);
}

.admin-nav-mobile-close { display: none; }

.admin-nav-menu {
    flex: 1;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 5px 13px 22px;
    scrollbar-width: thin;
    scrollbar-color: rgba(220, 233, 235, .18) transparent;
}

.admin-nav-menu::-webkit-scrollbar { width: 4px; }
.admin-nav-menu::-webkit-scrollbar-thumb { background: rgba(220, 233, 235, .18); border-radius: 4px; }
.admin-nav-menu-section { margin: 0 0 18px; }
.admin-nav-menu-section:last-child { margin-bottom: 6px; }

.admin-nav-section-label {
    min-height: 24px;
    padding: 0 9px 7px;
    display: flex;
    align-items: center;
    gap: 9px;
    color: #78919a;
    font-size: 10px;
    font-weight: 650;
    letter-spacing: .015em;
    white-space: nowrap;
}

.admin-nav-section-label::after {
    content: "";
    height: 1px;
    flex: 1;
    background: var(--admin-nav-line);
}

.admin-nav-section-items { display: grid; gap: 3px; }

.admin-nav-link {
    position: relative;
    width: 100%;
    min-height: 48px;
    padding: 7px 10px 7px calc(10px + var(--nav-depth-offset, 0px));
    display: grid;
    grid-template-columns: 32px minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    border: 1px solid transparent;
    border-radius: 11px;
    background: transparent;
    color: var(--admin-nav-muted);
    font: inherit;
    text-align: left;
    text-decoration: none;
    cursor: pointer;
    transition: color 150ms ease, background 150ms ease, border-color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.admin-nav-link > i:first-child {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border: 1px solid transparent;
    border-radius: 9px;
    color: #9cb2b9;
    font-size: 17px;
    text-align: center;
    transition: color 150ms ease, background 150ms ease, border-color 150ms ease;
}

.admin-nav-link > span {
    overflow: hidden;
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: -.008em;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.admin-nav-link:hover {
    color: #f5f9f9;
    transform: translateX(3px);
}

.admin-nav-link:hover > i:first-child {
    border-color: rgba(220, 233, 235, .13);
    background: var(--admin-nav-panel);
    color: #d9e8e9;
}

.admin-nav-link.is-active {
    border-color: rgba(121, 172, 171, .32);
    background: #31505b;
    color: #f1f7f7;
    box-shadow: 0 6px 15px rgba(8, 27, 35, .15);
    transform: none;
}

.admin-nav-link.is-active::after {
    content: "";
    position: absolute;
    top: 15px;
    right: -5px;
    width: 3px;
    height: 18px;
    border-radius: 3px 0 0 3px;
    background: var(--admin-nav-accent);
}

.admin-nav-link.is-active > i:first-child {
    border-color: rgba(167, 207, 204, .28);
    background: #3b616a;
    color: #c5dfdd;
}

.admin-nav-link.is-active:hover { color: #f1f7f7; transform: none; }
.admin-nav-link.is-active:hover > i:first-child { border-color: rgba(167, 207, 204, .28); background: #3b616a; color: #c5dfdd; }
.admin-nav-badge { min-width: 21px; padding: 3px 6px; border-radius: 6px; background: #f6dfd8; color: #9d4234; font-size: 8px; font-style: normal; font-weight: 800; text-align: center; }
.admin-nav-external { color: #78919a; font-size: 13px; }
.admin-nav-submenu-arrow { color: #78919a; font-size: 15px; transition: transform 150ms ease; }
.admin-nav-submenu.is-open > .admin-nav-link:not(.is-active) { color: #dce8e9; }
.admin-nav-submenu.is-open > .admin-nav-link .admin-nav-submenu-arrow { transform: rotate(180deg); }
.admin-nav-submenu-items { display: none; margin: 3px 0 7px 25px; padding-left: 8px; border-left: 1px solid rgba(121, 172, 171, .24); }
.admin-nav-submenu.is-open > .admin-nav-submenu-items { display: grid; gap: 2px; }
.admin-nav-submenu-items .admin-nav-link { min-height: 42px; padding-block: 5px; }
.admin-nav-submenu-items .admin-nav-link > i:first-child { width: 28px; height: 28px; font-size: 14px; }

.admin-nav-dock {
    position: relative;
    padding: 12px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    align-items: stretch;
    border-top: 1px solid var(--admin-nav-line);
}

.admin-nav-tools {
    grid-column: 2;
    grid-row: 1;
    display: grid;
    grid-template-columns: repeat(2, 36px);
    gap: 6px;
}

.admin-nav-tools button {
    width: 36px;
    height: 100%;
    min-height: 48px;
    display: grid;
    place-items: center;
    border: 1px solid var(--admin-nav-line);
    border-radius: 10px;
    background: var(--admin-nav-panel);
    color: var(--admin-nav-muted);
    cursor: pointer;
    transition: color 140ms ease, background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.admin-nav-tools button:hover {
    border-color: rgba(121, 172, 171, .42);
    background: #31505b;
    color: white;
    transform: translateY(-2px);
}

.admin-nav-tools button > i { font-size: 17px; }
.admin-nav-tools button > span { display: none; }

.admin-nav-profile {
    grid-column: 1;
    grid-row: 1;
    width: 100%;
    min-width: 0;
    min-height: 48px;
    padding: 5px 7px;
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 8px;
    align-items: center;
    border: 1px solid var(--admin-nav-line);
    border-radius: 10px;
    background: var(--admin-nav-panel);
    color: var(--admin-nav-text);
    text-align: left;
    cursor: pointer;
    transition: background 140ms ease, border-color 140ms ease;
}

.admin-nav-profile:hover { border-color: rgba(121, 172, 171, .36); background: #31505b; }
.admin-nav-avatar { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 8px; background: #3b5a64; color: #e6f0f1; font-size: 10px; font-weight: 750; }
.admin-nav-profile-copy { min-width: 0; display: grid; gap: 2px; }
.admin-nav-profile-copy strong { overflow: hidden; font-size: 10.5px; font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
.admin-nav-profile-copy small { overflow: hidden; color: #91a7af; font-size: 8.5px; text-overflow: ellipsis; white-space: nowrap; }
.admin-nav-profile > i { display: none; }

.admin-nav-popover {
    position: absolute;
    left: calc(100% + 10px);
    bottom: 12px;
    z-index: 20;
    width: 268px;
    overflow: hidden;
    border: 1px solid var(--lab-line, #dbe5e9);
    border-radius: 12px;
    background: white;
    color: var(--lab-ink, #263b4a);
    box-shadow: 0 14px 34px rgba(35, 65, 82, .17);
    animation: adminNavPopoverIn 150ms ease-out both;
}

.admin-nav-notifications { bottom: 74px; }
.admin-nav-popover-heading { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 14px 15px; border-bottom: 1px solid var(--lab-line, #dbe5e9); }
.admin-nav-popover-heading > strong { font-size: 13px; letter-spacing: -.01em; }
.admin-nav-popover-heading button { width: 28px; height: 28px; display: grid; place-items: center; border: 0; border-radius: 7px; background: #f1f5f6; color: var(--lab-ink-soft, #607584); cursor: pointer; }
.admin-nav-empty-notifications { min-height: 136px; padding: 20px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.admin-nav-empty-notifications > i { width: 36px; height: 36px; margin-bottom: 9px; display: grid; place-items: center; border-radius: 9px; background: var(--lab-cyan-pale, #e8f4f3); color: var(--lab-cyan-dark, #176d73); font-size: 19px; }
.admin-nav-empty-notifications strong { font-size: 12px; }
.admin-nav-empty-notifications span { margin-top: 3px; color: var(--lab-ink-soft, #607584); font-size: 10px; }
.admin-nav-account-menu { padding: 6px; }
.admin-nav-account-menu > button { width: 100%; padding: 9px; display: grid; grid-template-columns: 32px 1fr; gap: 10px; align-items: center; border: 0; border-radius: 8px; background: transparent; color: var(--lab-ink, #263b4a); text-align: left; cursor: pointer; }
.admin-nav-account-menu > button:hover { background: #f2f6f7; }
.admin-nav-account-menu > button > i { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 8px; background: var(--lab-cyan-pale, #e8f4f3); color: var(--lab-cyan-dark, #176d73); font-size: 16px; }
.admin-nav-account-menu > button span { display: grid; gap: 2px; }
.admin-nav-account-menu > button strong { font-size: 11px; }
.admin-nav-account-menu > button small { color: var(--lab-ink-soft, #607584); font-size: 9px; }
.admin-nav-account-menu > .admin-nav-logout > i { background: #fdeae5; color: #b74433; }

.admin-nav-stage { min-width: 0; min-height: 100vh; display: flex; flex-direction: column; }
.admin-shell .main-content.app-content { flex: 1; min-width: 0; min-height: 0; margin: 0 !important; padding: 0 !important; transition: none !important; }
.admin-shell > .admin-nav-stage > .footer { margin: 0 !important; }
.admin-nav-mobile-trigger, .admin-nav-overlay { display: none; }

.admin-shell.is-collapsed .admin-nav-brand-row { justify-content: center; padding-inline: 20px; }
.admin-shell.is-collapsed .admin-nav-brand { flex: 0 0 auto; }
.admin-shell.is-collapsed .admin-nav-logo-full,
.admin-shell.is-collapsed .admin-nav-section-label,
.admin-shell.is-collapsed .admin-nav-link > span,
.admin-shell.is-collapsed .admin-nav-link > em,
.admin-shell.is-collapsed .admin-nav-link > .admin-nav-submenu-arrow,
.admin-shell.is-collapsed .admin-nav-profile-copy,
.admin-shell.is-collapsed .admin-nav-profile > i { display: none; }
.admin-shell.is-collapsed .admin-nav-logo-compact { display: block; }
.admin-shell.is-collapsed .admin-nav-collapse { position: absolute; top: 64px; right: -14px; z-index: 3; border-color: #172a33; background: var(--admin-nav-bg); }
.admin-shell.is-collapsed .admin-nav-menu { padding-inline: 13px; }
.admin-shell.is-collapsed .admin-nav-menu-section { margin-bottom: 12px; }
.admin-shell.is-collapsed .admin-nav-link { grid-template-columns: 1fr; justify-items: center; padding: 7px; }
.admin-shell.is-collapsed .admin-nav-link:hover { transform: none; }
.admin-shell.is-collapsed .admin-nav-link.is-active::after { right: -14px; }
.admin-shell.is-collapsed .admin-nav-submenu-items { display: none; }
.admin-shell.is-collapsed .admin-nav-dock { grid-template-columns: 1fr; padding-inline: 13px; }
.admin-shell.is-collapsed .admin-nav-tools { grid-column: 1; grid-row: 1; grid-template-columns: repeat(2, 24px); justify-content: center; gap: 6px; }
.admin-shell.is-collapsed .admin-nav-tools button { width: 24px; min-height: 34px; border: 0; background: transparent; }
.admin-shell.is-collapsed .admin-nav-profile { grid-column: 1; grid-row: 2; grid-template-columns: 34px; justify-content: center; padding: 6px; }

@keyframes adminNavPopoverIn {
    from { opacity: 0; transform: translateX(-4px); }
    to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 991.98px) {
    .admin-shell,
    .admin-shell.is-collapsed { --admin-nav-width: min(304px, calc(100vw - 34px)); grid-template-columns: minmax(0, 1fr); }
    .admin-navigation { position: fixed; left: 0; visibility: hidden; transform: translateX(-102%); transition: width 180ms ease, transform 180ms ease, visibility 0s linear 180ms; }
    .admin-shell.is-mobile-open .admin-navigation { visibility: visible; transform: translateX(0); transition-delay: 0s; }
    .admin-shell.is-collapsed .admin-nav-brand-row { justify-content: flex-start; padding: 16px 15px 16px 20px; }
    .admin-shell.is-collapsed .admin-nav-brand { flex: 1; }
    .admin-shell.is-collapsed .admin-nav-logo-full { display: block; }
    .admin-shell.is-collapsed .admin-nav-logo-compact { display: none; }
    .admin-shell.is-collapsed .admin-nav-section-label { display: flex; }
    .admin-shell.is-collapsed .admin-nav-link > span { display: block; }
    .admin-shell.is-collapsed .admin-nav-profile-copy { display: grid; }
    .admin-shell.is-collapsed .admin-nav-link > em,
    .admin-shell.is-collapsed .admin-nav-link > .admin-nav-submenu-arrow { display: inline-block; }
    .admin-shell.is-collapsed .admin-nav-menu { padding: 5px 13px 22px; }
    .admin-shell.is-collapsed .admin-nav-menu-section { margin-bottom: 18px; }
    .admin-shell.is-collapsed .admin-nav-link { grid-template-columns: 32px minmax(0, 1fr) auto; justify-items: stretch; padding: 7px 10px 7px calc(10px + var(--nav-depth-offset, 0px)); }
    .admin-shell.is-collapsed .admin-nav-link:hover { transform: translateX(3px); }
    .admin-shell.is-collapsed .admin-nav-link.is-active { transform: none; }
    .admin-shell.is-collapsed .admin-nav-link.is-active::after { right: -5px; }
    .admin-shell.is-collapsed .admin-nav-submenu.is-open > .admin-nav-submenu-items { display: grid; }
    .admin-shell.is-collapsed .admin-nav-dock { grid-template-columns: minmax(0, 1fr) auto; padding: 12px; }
    .admin-shell.is-collapsed .admin-nav-tools { grid-column: 2; grid-row: 1; grid-template-columns: repeat(2, 36px); gap: 6px; }
    .admin-shell.is-collapsed .admin-nav-tools button { width: 36px; min-height: 48px; border: 1px solid var(--admin-nav-line); background: var(--admin-nav-panel); }
    .admin-shell.is-collapsed .admin-nav-profile { grid-column: 1; grid-row: 1; grid-template-columns: 34px minmax(0, 1fr); justify-content: stretch; padding: 5px 7px; }
    .admin-nav-collapse { display: none; }
    .admin-nav-mobile-close { display: grid; }
    .admin-nav-mobile-trigger {
        position: fixed;
        left: 14px;
        bottom: 16px;
        z-index: 1040;
        min-height: 44px;
        padding: 0 15px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        border: 1px solid #172a33;
        border-radius: 11px;
        background: var(--admin-nav-bg);
        color: white;
        box-shadow: 0 9px 24px rgba(35, 65, 82, .2);
        font: 700 11px Inter, sans-serif;
        cursor: pointer;
    }
    .admin-nav-mobile-trigger i { color: #a8cfcc; font-size: 18px; }
    .admin-nav-overlay { position: fixed; inset: 0; z-index: 1045; display: block; border: 0; background: rgba(24, 43, 54, .5); backdrop-filter: blur(2px); animation: adminNavFadeIn 140ms ease-out both; }
    .admin-nav-popover { position: fixed; left: 12px; right: 12px; bottom: 12px; width: auto; }
    .admin-nav-notifications { bottom: 78px; }
}

@media (max-height: 680px) {
    .admin-navigation { min-height: 100vh; }
    .admin-nav-menu-section { margin-bottom: 11px; }
    .admin-nav-link { min-height: 42px; }
}

@keyframes adminNavFadeIn { from { opacity: 0; } to { opacity: 1; } }

@media (prefers-reduced-motion: reduce) {
    .admin-shell,
    .admin-navigation,
    .admin-nav-link,
    .admin-nav-link > i:first-child,
    .admin-nav-tools button,
    .admin-nav-popover { transition: none; animation: none; }
}