#appTopbar {
    --nav-surface: #fff;
    --nav-text: #29445f;
    --nav-muted: #73869b;
    --nav-border: #e0e8f0;
    --nav-hover: #f0f6fc;
    --nav-active: #e8f2ff;
    --nav-accent: #176bd1;
    --nav-shadow: 0 16px 48px rgba(16, 40, 70, .18);
    padding: 0 20px !important;
    background: linear-gradient(105deg, #0b427e, #176bd1);
    border-bottom: 1px solid rgba(255, 255, 255, .18);
    box-shadow: 0 2px 10px rgba(13, 50, 96, .16);
}

#appTopbar .navbar-container { gap: 16px; flex-wrap: nowrap; }
#appTopbar .navbar-left { flex: 0 0 calc(var(--module-sidebar-width, var(--sidebar-width)) - 36px); min-width: 0; padding: 0; margin: 0 !important; container-type: inline-size; }
#appTopbar .navbar-brand { height: auto; padding: 0; font-size: 20px; }
#appTopbar .navbar-center { position: static; flex: 1 1 auto; min-width: 0; width: auto; height: 100%; }
#appTopbar .navbar-center > .navbar-collapse { min-width: 0; }
#appTopbar .navbar-center .navbar-nav { align-items: center; gap: 6px; }
#appTopbar .c9-module-toggle {
    display: flex;
    align-items: center;
    gap: 7px;
    min-height: 38px;
    margin: 0;
    padding: 8px 10px !important;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: #fff !important;
    font-size: 14px;
    font-weight: 600;
    line-height: 20px;
    white-space: nowrap;
    transition: background-color .15s ease;
}

#appTopbar .c9-module-toggle > i { font-size: 16px; opacity: .85; }
#appTopbar .c9-module-toggle:hover { background: rgba(255, 255, 255, .12); box-shadow: none; }
#appTopbar .c9-module-toggle.show { background: #fff; color: #145aab !important; box-shadow: none; }
#appTopbar .c9-module-toggle::after { width: 6px; height: 6px; margin: -3px 1px 0 3px; border: solid currentColor; border-width: 0 1.5px 1.5px 0; transform: rotate(45deg); }
#appTopbar .c9-module-toggle.show::after { margin-top: 3px; transform: rotate(225deg); }
#appTopbar .c9-module-toggle:focus-visible,
#appTopbar .navbar-user .nav-link:focus-visible,
#appTopbar .navbar-toggler:focus-visible { outline: 2px solid #b2eff2; outline-offset: 2px; box-shadow: none; }

#appTopbar .dropdown-menu {
    background: var(--nav-surface);
    color: var(--nav-text);
    border: 1px solid var(--nav-border);
    border-radius: 14px;
    box-shadow: var(--nav-shadow);
}

#appTopbar .dropdown-menu:not(.show) { display: none; }
#appTopbar .navbar-center .c9-module-menu {
    position: fixed;
    top: var(--nav-panel-top, calc(var(--navbar-height) + 8px));
    left: var(--nav-panel-left, 16px);
    right: auto;
    width: min(calc(var(--nav-columns, 3) * 320px), calc(100vw - 32px));
    min-width: 0;
    max-height: calc(100dvh - var(--navbar-height) - 24px);
    margin: 0;
    padding: 16px;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    transform: none !important;
}

#appTopbar .c9-module-menu.show { display: grid; grid-template-columns: repeat(var(--nav-columns, 3), minmax(0, 1fr)); align-items: start; gap: 8px 20px; animation: c9-navigation-enter .14s ease-out; }
#appTopbar .c9-nav-column { min-width: 0; list-style: none; }
#appTopbar .c9-nav-column > ul { margin: 0; padding: 0; list-style: none; }
#appTopbar .c9-nav-group { min-width: 0; margin-bottom: 10px; list-style: none; }
#appTopbar .c9-nav-group > ul,
#appTopbar .c9-nav-submenu { margin: 0; padding: 0; list-style: none; }
#appTopbar .c9-nav-group .dropdown-header { padding: 10px 10px 8px; color: var(--nav-muted); font-size: 11px; font-weight: 700; letter-spacing: .1em; white-space: normal; }
#appTopbar .c9-module-menu .dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    min-height: 40px;
    padding: 9px 10px;
    color: var(--nav-text);
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    white-space: normal;
    overflow-wrap: anywhere;
}

#appTopbar .c9-module-menu .dropdown-item i { flex: 0 0 18px; width: 18px; color: var(--nav-muted); font-size: 17px; }
#appTopbar .c9-module-menu .dropdown-item:hover,
#appTopbar .c9-nav-subgroup__toggle:hover { color: var(--nav-accent); background: var(--nav-hover); box-shadow: none; }
#appTopbar .c9-module-menu .dropdown-item[aria-current="page"] { color: var(--nav-accent); background: var(--nav-active); font-weight: 700; }
#appTopbar .c9-module-menu .dropdown-item[aria-current="page"] i { color: inherit; }
#appTopbar .c9-module-menu .dropdown-item:focus-visible,
#appTopbar .c9-nav-subgroup__toggle:focus-visible { outline: 2px solid var(--nav-accent); outline-offset: -2px; box-shadow: none; background: var(--nav-hover); }
#appTopbar .c9-nav-subgroup { margin: 2px 0 8px; }
#appTopbar .c9-nav-subgroup__toggle { display: flex; align-items: center; gap: 10px; min-height: 40px; padding: 9px 10px; border-radius: 8px; color: var(--nav-text); font-size: 14px; font-weight: 600; line-height: 20px; cursor: pointer; list-style: none; }
#appTopbar .c9-nav-subgroup__toggle::-webkit-details-marker { display: none; }
#appTopbar .c9-nav-subgroup__toggle::after { content: ""; flex: 0 0 6px; width: 6px; height: 6px; margin-left: auto; border: solid currentColor; border-width: 0 1.5px 1.5px 0; transform: rotate(45deg); }
#appTopbar .c9-nav-subgroup[open] > summary::after { transform: rotate(225deg); }
#appTopbar .c9-nav-subgroup__toggle i { color: var(--nav-muted); }
#appTopbar .c9-nav-submenu { margin: 0 0 0 18px; padding-left: 8px; border-left: 1px solid var(--nav-border); }

#appTopbar .navbar-user { position: static; flex: 0 0 auto; height: 100%; margin: 0; }
#appTopbar .navbar-user .navbar-nav { flex-direction: row; align-items: center; gap: 8px; }
#appTopbar .navbar-user .nav-link { display: inline-flex; align-items: center; justify-content: center; min-height: 36px; padding: 0 6px !important; border-radius: 8px; line-height: 20px; }
#appTopbar .topbar-icon { width: 36px; height: 36px; min-height: 36px; font-size: 18px; }
#appTopbar .navbar-user .form-switch { display: flex; align-items: center; min-height: 36px; margin: 0 !important; }
#appTopbar .c9-user-avatar { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 30px; width: 30px; height: 30px; border: 1px solid rgba(255, 255, 255, .25); border-radius: 9px; background: rgba(255, 255, 255, .15); color: #fff; font-size: 20px; }
#appTopbar .c9-user-name { max-width: 150px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
#appTopbar .navbar-user .dropdown-menu { top: calc(100% + 8px); right: 0; left: auto; width: min(360px, calc(100vw - 24px)); min-width: 0 !important; max-height: calc(100dvh - var(--navbar-height) - 24px); overflow: auto; }
#appTopbar .c9-account-summary { display: flex; flex-direction: column; gap: 4px; padding: 12px; overflow-wrap: anywhere; }
#appTopbar .c9-account-summary > span { color: var(--nav-muted); font-size: 11px; text-transform: uppercase; letter-spacing: .1em; }
#appTopbar .c9-account-summary > strong { color: var(--nav-text); font-size: 14px; }
#appTopbar .c9-account-meta .login-duration-chip { gap: 8px; padding: 6px 12px; border-radius: 0; background: transparent; color: var(--nav-muted); font-size: 13px; white-space: normal; overflow-wrap: anywhere; }
#appTopbar .navbar-toggler { position: static; flex: 0 0 36px; width: 36px; height: 36px; padding: 4px; border: 1px solid rgba(255, 255, 255, .3); border-radius: 8px; color: #fff; }

[data-theme="dark"] #appTopbar,
[data-bs-theme="dark"] #appTopbar { --nav-surface: #202d3d; --nav-text: #dbe6f2; --nav-muted: #9cafc3; --nav-border: #34475e; --nav-hover: #293e55; --nav-active: #1c4166; --nav-accent: #83bbff; --nav-shadow: 0 16px 48px rgba(0, 0, 0, .35); background: #17283c; }
[data-theme="dark"] #appTopbar .c9-module-toggle.show,
[data-bs-theme="dark"] #appTopbar .c9-module-toggle.show { color: var(--nav-accent) !important; background: var(--nav-surface); }

@keyframes c9-navigation-enter { from { opacity: 0; } to { opacity: 1; } }
@media (min-width: 1200px) {
    @container (max-width: 70px) {
        #appTopbar .navbar-brand > span { display: none; }
        #appTopbar .navbar-brand::before { content: "C9"; }
    }
}
@media (max-width: 1439.98px) { #appTopbar .c9-user-name { display: none; } }
@media (min-width: 1200px) and (max-width: 1359.98px) {
    #appTopbar .c9-module-toggle { gap: 6px; padding: 8px !important; }
    #appTopbar .navbar-center .navbar-nav { gap: 4px; }
}
@media (max-width: 1199.98px) {
    #appTopbar { padding: 0 16px !important; }
    #appTopbar .navbar-container { gap: 8px; }
    #appTopbar .navbar-left { flex: 1 1 auto; container-type: normal; }
    #appTopbar .navbar-center { flex: 0 0 0; width: 0; height: 0; }
    #appTopbar .navbar-user { order: 2; }
    #appTopbar .navbar-toggler { order: 3; display: inline-flex; align-items: center; justify-content: center; }
    #appTopbar #navbarContent { position: fixed; top: var(--navbar-height); right: 0; bottom: 0; left: 0; max-height: calc(100dvh - var(--navbar-height)); padding: 16px; overflow: auto; overscroll-behavior: contain; background: var(--nav-surface); border-top: 1px solid var(--nav-border); box-shadow: var(--nav-shadow); }
    #appTopbar #navbarContent.collapsing { display: none; transition: none; }
    #appTopbar .navbar-center .navbar-nav { flex-direction: column; align-items: stretch; width: min(100%, 880px); margin: 0 auto !important; gap: 8px; }
    #appTopbar .c9-module-toggle { width: 100%; min-height: 44px; justify-content: flex-start; padding: 12px !important; color: var(--nav-text) !important; background: var(--nav-hover); }
    #appTopbar .c9-module-toggle > span { flex: 1 1 auto; text-align: left; }
    #appTopbar .c9-module-toggle.show { color: var(--nav-accent) !important; background: var(--nav-active); box-shadow: none; }
    #appTopbar .navbar-center .c9-module-menu { position: static; width: 100%; max-width: none; max-height: none; margin: 6px 0 12px; padding: 4px 8px 12px; border: 0; border-bottom: 1px solid var(--nav-border); border-radius: 0; box-shadow: none; overflow: visible; }
    #appTopbar .c9-module-menu.show { grid-template-columns: 1fr; gap: 4px; }
    #appTopbar .c9-nav-column,
    #appTopbar .c9-nav-column > ul { display: contents; }
    #appTopbar .c9-module-menu .dropdown-item { min-height: 44px; }
    #appTopbar .navbar-user .dropdown-menu { position: fixed !important; top: calc(var(--navbar-height) + 8px) !important; right: 12px !important; left: auto !important; width: min(360px, calc(100vw - 24px)); }
    #appTopbar .navbar-user .nav-item { margin: 0 !important; }
}

@media (prefers-reduced-motion: reduce) {
    #appTopbar .c9-module-toggle,
    #appTopbar .c9-module-toggle::after,
    #appTopbar .dropdown-menu { transition: none; animation: none; }
}