/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    z-index: 1040;
    box-shadow: var(--shadow);
    transition: transform 0.28s ease, box-shadow 0.28s ease;
}

.app-shell-toggle {
    position: absolute;
    top: calc(var(--navbar-height) + 0.75rem);
    right: -44px;
    width: 44px;
    height: 44px;
    border: 1px solid var(--form-border);
    border-left: 0;
    border-radius: 0 !important;
    border-top-right-radius: var(--surface-radius-sm) !important;
    border-bottom-right-radius: var(--surface-radius-sm) !important;
    color: var(--header-color);
    background: var(--surface-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.app-shell-toggle:hover,
.app-shell-toggle:focus {
    background: var(--sidebar-hover);
    border-color: var(--form-border);
    border-left: 0;
}

.app-shell-toggle i {
    transition: transform 0.28s ease;
}

.sidebar-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.sidebar-brand {
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1rem;
}

.sidebar-brand-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem 0.875rem;
}

.sidebar-section + .sidebar-section {
    margin-top: 1.5rem;
}

.sidebar-section-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--primary-color);
    padding: 0 0.75rem;
    margin-bottom: 0.5rem;
}

.sidebar-section-empty {
    padding: 0.55rem 0.75rem;
    color: var(--muted-color, #6c757d);
    font-size: 0.85rem;
    line-height: 1.35;
}

button.sidebar-link {
    letter-spacing: 0;
    font-weight: normal;
    color: var(--sidebar-text) !important;
}

.sidebar-link {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.875rem;
    padding: 0.75rem 0.875rem;
    border-radius: 14px;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.sidebar-link i {
    width: 18px;
    text-align: center;
    font-size: 0.95rem;
    flex-shrink: 0;
}

.sidebar-link span {
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.2;
}

.sidebar-link:hover {
    background: var(--sidebar-hover);
}

.sidebar-link.active {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
}

.sidebar-link-toggle {
    width: 100%;
    border: 0;
    background: transparent;
    text-align: left;
    color: inherit;
    box-shadow: none;
    appearance: none;
    -webkit-appearance: none;
}

.sidebar-link-toggle.is-expanded {
    color: var(--sidebar-active-text);
}

.sidebar-link-main {
    display: inline-flex;
    align-items: center;
    gap: 0.875rem;
    min-width: 0;
}

.sidebar-link-indicator {
    margin-left: auto;
    width: 0.5rem;
    height: 0.5rem;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
    transition: transform 0.2s ease;
    opacity: 0.7;
}

.sidebar-link-toggle[aria-expanded="true"] .sidebar-link-indicator {
    transform: rotate(225deg);
}

.sidebar-submenu {
    padding: 0.1rem 0 0.1rem 1.9rem;
}

.sidebar-sublink {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 0.875rem;
    border-radius: var(--form-border-radius);
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.9rem;
}

.sidebar-sublink::before {
    content: "";
    width: 0.3rem;
    height: 0.3rem;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.5;
    flex-shrink: 0;
}

.sidebar-sublink:hover {
    background: var(--sidebar-hover);
}

.sidebar-sublink.active {
    color: var(--sidebar-active-text);
    font-weight: 700;
}

.sidebar-sublink--spaced {
    margin-bottom: 0.55rem;
    padding-bottom: 0.7rem;
    border-bottom: 1px solid var(--form-border);
}

.sidebar-bottom {
    padding: 1rem;
    background: var(--surface-color);
    border-top: 1px solid var(--form-border);
}

/* Main content */
.page-content {
    box-sizing: border-box;
    min-height: 100vh;
    padding-left: var(--content-gutter);
    padding-right: var(--content-gutter);
}

.page-content.logged-in {
    margin-left: var(--sidebar-width);
    padding-top: var(--navbar-height);
    transition: margin-left 0.28s ease;
}

.body-content {
    padding: 3rem 0 2rem;
}

.body-content > .row {
    margin-left: 0;
    margin-right: 0;
}

/* User toggle */
.app-user-toggle {
    padding: 0.5rem 0.75rem;
    border-radius: 14px;
}

.app-user-toggle:hover {
    background: #f8f9fa;
}

body.sidebar-collapsed .sidebar {
    transform: translateX(calc(-1 * var(--sidebar-width)));
    box-shadow: none;
}

body.sidebar-collapsed .app-shell-toggle {
    right: -44px;
}

body.sidebar-collapsed .app-shell-toggle i {
    transform: rotate(180deg);
}

body.sidebar-collapsed .page-content.logged-in {
    margin-left: 0;
}

/* Responsive */
@media (max-width: 991.98px) {
    .sidebar {
        display: none;
    }

    .app-shell-toggle {
        display: none !important;
    }

    .page-content,
    .page-content.logged-in {
        margin-left: 0;
        padding-left: 0;
        padding-right: 0;
    }

    .body-content {
        padding: 1.25rem var(--mobile-content-gutter) 1.5rem;
    }
}

@media (max-width: 575.98px) {
    .page-content,
    .page-content.logged-in {
        padding-left: 0;
        padding-right: 0;
    }

    .body-content {
        padding: 1rem var(--mobile-content-gutter) 1.25rem;
    }
}