/* Application shell: sidebar, top bar and content frame.
 * Colors and sizes come from design-system.css tokens. */

:root {
    --sidebar-width: 248px;
    --sidebar-collapsed-width: 64px;
    --topbar-height: var(--tm-topbar-height);
}

body {
    overflow-x: hidden;
}

.wrapper {
    display: flex;
    width: 100%;
    align-items: stretch;
}

/* ---------- Sidebar ---------- */

#sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 999;
    display: flex;
    flex-direction: column;
    background: var(--tm-sidebar-bg);
    color: var(--tm-sidebar-text);
    transition: width 0.2s ease, min-width 0.2s ease, max-width 0.2s ease;
    overflow-x: hidden;
    overflow-y: auto;
}

#sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
    min-width: var(--sidebar-collapsed-width);
    max-width: var(--sidebar-collapsed-width);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--tm-space-2);
    height: var(--topbar-height);
    padding: 0 var(--tm-space-4);
    color: #fff;
    font-size: var(--tm-font-size-lg);
    font-weight: 600;
    white-space: nowrap;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-brand i {
    width: 20px;
    text-align: center;
    color: var(--tm-sidebar-accent);
}

#sidebar.collapsed .sidebar-brand {
    justify-content: center;
    padding: 0;
}

#sidebar.collapsed .sidebar-brand .brand-text {
    display: none;
}

/* Navigation list */
#sidebar ul.components {
    list-style: none;
    margin: 0;
    padding: var(--tm-space-2) 0;
}

#sidebar ul li {
    position: relative;
}

#sidebar ul li a {
    display: flex;
    align-items: center;
    gap: var(--tm-space-2);
    min-height: 36px;
    padding: 0 var(--tm-space-4) 0 var(--tm-space-4);
    margin: 1px var(--tm-space-2);
    border-radius: var(--tm-radius);
    font-size: var(--tm-font-size-base);
    color: var(--tm-sidebar-text);
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 0.15s ease, color 0.15s ease;
}

#sidebar ul li a:hover {
    color: #fff;
    background: var(--tm-sidebar-hover);
}

#sidebar ul li.active > a {
    color: #fff;
    background: var(--tm-sidebar-active-bg);
    box-shadow: inset 2px 0 0 var(--tm-sidebar-accent);
}

#sidebar ul li a i {
    width: 18px;
    flex: 0 0 18px;
    text-align: center;
    font-size: 0.9em;
    opacity: 0.85;
}

#sidebar ul li.active > a i {
    opacity: 1;
}

#sidebar.collapsed ul li a {
    justify-content: center;
    padding: 0;
    margin: 1px var(--tm-space-2);
}

#sidebar.collapsed ul li a .menu-text {
    display: none;
}

/* Group captions separate related modules, e.g. "Tickets", "Administration". */
#sidebar .sidebar-group-title {
    padding: var(--tm-space-3) var(--tm-space-4) var(--tm-space-1);
    font-size: var(--tm-font-size-xs);
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--tm-sidebar-group-text);
    white-space: nowrap;
}

#sidebar.collapsed .sidebar-group-title {
    height: 1px;
    margin: var(--tm-space-2) var(--tm-space-3);
    padding: 0;
    background: rgba(255, 255, 255, 0.08);
    font-size: 0;
}

/* Expandable group (Administration) */
#sidebar ul li a[data-bs-toggle="collapse"]::after {
    content: '\f107';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    margin-left: auto;
    font-size: 0.8em;
    transition: transform 0.2s ease;
}

#sidebar.collapsed ul li a[data-bs-toggle="collapse"]::after {
    display: none;
}

#sidebar ul li a[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

#sidebar ul.collapse {
    margin: 0 0 var(--tm-space-1);
    padding: 0;
    list-style: none;
}

#sidebar ul.collapse li a {
    padding-left: 2.25rem;
    min-height: 32px;
    font-size: var(--tm-font-size-sm);
}

#sidebar.collapsed ul.collapse {
    display: none !important;
}

.sidebar-divider {
    height: 1px;
    margin: var(--tm-space-2) var(--tm-space-4);
    background: rgba(255, 255, 255, 0.08);
}

/* Signed-in user at the bottom of the sidebar */
.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--tm-space-2);
    margin-top: auto;
    padding: var(--tm-space-3) var(--tm-space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

#sidebar.collapsed .sidebar-user {
    justify-content: center;
    padding: var(--tm-space-3) 0;
}

.sidebar-user .user-avatar {
    flex: 0 0 28px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--tm-primary);
    color: #fff;
    font-size: var(--tm-font-size-sm);
    font-weight: 600;
}

.sidebar-user .user-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: var(--tm-font-size-sm);
    color: #fff;
}

#sidebar.collapsed .sidebar-user .user-name {
    display: none;
}

#sidebar::-webkit-scrollbar {
    width: 6px;
}

#sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

/* ---------- Content frame ---------- */

#content {
    width: 100%;
    min-height: 100vh;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    transition: margin-left 0.2s ease;
}

#content.expanded {
    margin-left: var(--sidebar-collapsed-width);
}

/* Top bar: sidebar toggle, breadcrumb, account menu. */
.app-topbar {
    position: sticky;
    top: 0;
    z-index: 900;
    display: flex;
    align-items: center;
    gap: var(--tm-space-3);
    height: var(--topbar-height);
    padding: 0 var(--tm-space-4);
    background: var(--tm-surface);
    border-bottom: 1px solid var(--tm-border);
}

.app-topbar .toggle-sidebar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    padding: 0;
    border: 1px solid transparent;
    border-radius: var(--tm-radius);
    background: transparent;
    color: var(--tm-text-muted);
    cursor: pointer;
}

.app-topbar .toggle-sidebar:hover {
    color: var(--tm-text);
    background: var(--tm-surface-hover);
}

.app-topbar .app-brand-mobile {
    display: none;
    font-weight: 600;
    color: var(--tm-text);
    white-space: nowrap;
}

.app-topbar .app-breadcrumb {
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.app-topbar .app-breadcrumb .breadcrumb {
    flex-wrap: nowrap;
}

.app-topbar .app-breadcrumb .breadcrumb-item.active {
    font-weight: 600;
}

.app-topbar .app-user-menu {
    margin-left: auto;
}

.app-topbar .app-user-menu .btn {
    color: var(--tm-text);
    background: transparent;
    border-color: transparent;
    padding: 0.25rem 0.5rem;
}

.app-topbar .app-user-menu .btn:hover {
    background: var(--tm-surface-hover);
    border-color: transparent;
}

/* Main work area */
.app-content {
    flex: 1 1 auto;
    padding: var(--tm-space-5) var(--tm-space-5) var(--tm-space-4);
}

.app-content .container,
.app-content .container-fluid {
    max-width: none;
    padding-left: 0;
    padding-right: 0;
}

.app-footer {
    padding: var(--tm-space-3) var(--tm-space-5);
    font-size: var(--tm-font-size-sm);
    color: var(--tm-text-muted);
    border-top: 1px solid var(--tm-border);
    background: var(--tm-surface);
}

/* ---------- Responsive ---------- */

@media (max-width: 991.98px) {
    .app-content {
        padding: var(--tm-space-4);
    }
}

@media (max-width: 768px) {
    #sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
        box-shadow: var(--tm-shadow-overlay);
        transition: margin-left 0.2s ease;
    }

    #sidebar.active {
        margin-left: 0;
    }

    /* On phones the sidebar overlays the page and is always fully expanded. */
    #sidebar.collapsed {
        width: var(--sidebar-width);
        min-width: var(--sidebar-width);
        max-width: var(--sidebar-width);
    }

    #sidebar.collapsed .sidebar-brand .brand-text,
    #sidebar.collapsed ul li a .menu-text,
    #sidebar.collapsed .sidebar-user .user-name {
        display: revert;
    }

    #sidebar.collapsed ul li a {
        justify-content: flex-start;
        padding: 0 var(--tm-space-4);
    }

    #sidebar.collapsed .sidebar-group-title {
        height: auto;
        margin: 0;
        padding: var(--tm-space-3) var(--tm-space-4) var(--tm-space-1);
        background: none;
        font-size: var(--tm-font-size-xs);
    }

    #content,
    #content.expanded {
        margin-left: 0;
    }

    .app-topbar .app-brand-mobile {
        display: block;
    }

    .app-topbar .app-breadcrumb {
        display: none;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        width: 100%;
        height: 100%;
        background: rgba(15, 23, 42, 0.45);
        z-index: 998;
        top: 0;
        left: 0;
    }

    .sidebar-overlay.active {
        display: block;
    }
}