:root {
    --admin-topbar-height: 56px;
    --admin-sidebar-width: 260px;
    --admin-sidebar-collapsed: 72px;
    --admin-sidebar-bg: #1e293b;
    --admin-sidebar-hover: #334155;
    --admin-sidebar-active: #0d6efd;
    --admin-sidebar-text: #cbd5e1;
    --admin-sidebar-muted: #94a3b8;
}

/* ─── Layout ─────────────────────────────────────────────── */

.admin-body {
    background-color: #f1f5f9;
}

.admin-topbar {
    height: var(--admin-topbar-height);
    z-index: 1030;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.admin-topbar .navbar-brand {
    font-size: 1.05rem;
    font-weight: 600;
}

.admin-sidebar {
    position: fixed;
    top: var(--admin-topbar-height);
    left: 0;
    width: var(--admin-sidebar-width);
    height: calc(100vh - var(--admin-topbar-height));
    background: var(--admin-sidebar-bg);
    z-index: 1020;
    transition: width 0.25s ease, transform 0.25s ease;
    overflow: hidden;
}

.admin-sidebar.collapsed {
    width: var(--admin-sidebar-collapsed);
}

.admin-sidebar .sidebar-inner {
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.75rem 0;
    scrollbar-width: thin;
    scrollbar-color: #475569 transparent;
}

.admin-main {
    margin-top: var(--admin-topbar-height);
    margin-left: 0;
    min-height: calc(100vh - var(--admin-topbar-height));
    transition: margin-left 0.25s ease;
}

@media (min-width: 992px) {
    .admin-main {
        margin-left: var(--admin-sidebar-width);
    }

    .admin-main.sidebar-collapsed {
        margin-left: var(--admin-sidebar-collapsed);
    }
}

.admin-content {
    padding: 1rem;
}

@media (min-width: 768px) {
    .admin-content {
        padding: 1.5rem;
    }
}

@media (min-width: 1200px) {
    .admin-content {
        padding: 1.75rem 2rem;
    }
}

/* ─── Sidebar navigation ───────────────────────────────── */

.admin-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--admin-sidebar-text);
    padding: 0.65rem 1rem;
    margin: 0.1rem 0.5rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s;
}

.admin-nav .nav-link i:first-child {
    font-size: 1.1rem;
    width: 1.25rem;
    text-align: center;
    flex-shrink: 0;
}

.admin-nav .nav-link:hover {
    background: var(--admin-sidebar-hover);
    color: #fff;
}

.admin-nav .nav-link.active {
    background: var(--admin-sidebar-active);
    color: #fff;
}

.admin-nav .submenu-toggle[aria-expanded="true"] .submenu-chevron {
    transform: rotate(180deg);
}

.submenu-chevron {
    font-size: 0.75rem;
    transition: transform 0.2s;
    color: var(--admin-sidebar-muted);
}

.admin-nav .submenu {
    padding-left: 0.25rem;
}

.admin-nav .submenu .nav-link {
    padding-left: 2.5rem;
    font-size: 0.85rem;
}

.admin-nav .submenu .nav-link i:first-child {
    font-size: 0.95rem;
}

/* Collapsed desktop sidebar: icons only */
.admin-sidebar.collapsed .nav-text,
.admin-sidebar.collapsed .submenu-chevron,
.admin-sidebar.collapsed .collapse {
    display: none !important;
}

.admin-sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 0.65rem;
    margin: 0.15rem 0.5rem;
}

.admin-sidebar.collapsed .submenu-toggle {
    pointer-events: none;
}

/* ─── Mobile offcanvas ───────────────────────────────────── */

.admin-offcanvas {
    width: min(85vw, 300px) !important;
    background: var(--admin-sidebar-bg);
}

.admin-offcanvas .offcanvas-header {
    background: #0f172a;
    color: #fff;
}

.admin-offcanvas .btn-close {
    filter: invert(1);
}

/* ─── Page components ────────────────────────────────────── */

.page-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.page-header h2 {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 600;
}

@media (min-width: 768px) {
    .page-header h2 {
        font-size: 1.6rem;
    }
}

.stat-card {
    border: none;
    border-left: 4px solid var(--admin-sidebar-active);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    height: 100%;
}

.stat-card .card-body h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0;
}

.table-card {
    background: #fff;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.table-card .table {
    margin-bottom: 0;
}

.table-actions {
    white-space: nowrap;
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.filter-bar .form-control,
.filter-bar .form-select {
    min-width: 140px;
}

/* ─── Mobile tables ──────────────────────────────────────── */

@media (max-width: 767.98px) {
    .table-responsive-mobile {
        border: 0;
    }

    .table-responsive-mobile thead {
        display: none;
    }

    .table-responsive-mobile tbody tr {
        display: block;
        margin-bottom: 0.75rem;
        border: 1px solid #dee2e6;
        border-radius: 0.5rem;
        background: #fff;
        padding: 0.5rem;
    }

    .table-responsive-mobile tbody td {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        gap: 0.5rem;
        padding: 0.4rem 0.5rem;
        border: none;
        text-align: right;
    }

    .table-responsive-mobile tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        color: #64748b;
        text-align: left;
        flex-shrink: 0;
    }

    .table-responsive-mobile tbody td.table-actions {
        justify-content: flex-end;
        flex-wrap: wrap;
        border-top: 1px solid #eee;
        margin-top: 0.25rem;
        padding-top: 0.6rem;
    }

    .table-responsive-mobile tbody td.table-actions::before {
        display: none;
    }

    .table-actions .btn {
        font-size: 0.8rem;
    }

    .page-header .btn {
        width: 100%;
    }

    @media (min-width: 400px) {
        .page-header .btn {
            width: auto;
        }
    }
}

/* ─── Export toolbar ─────────────────────────────────────── */

.admin-export-toolbar {
    padding: 0.5rem 0.75rem;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
}

.admin-export-toolbar .btn {
    white-space: nowrap;
}

@media print {
    .admin-export-toolbar,
    .admin-sidebar,
    .admin-topbar,
    .filter-bar,
    .page-header .btn,
    .table-actions,
    .alert {
        display: none !important;
    }

    .admin-main {
        margin: 0 !important;
        padding: 0 !important;
    }
}

/* ─── Login ──────────────────────────────────────────────── */

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e3a5f 0%, #0d6efd 100%);
    padding: 1rem;
}

.login-card {
    width: 100%;
    max-width: 420px;
    border: none;
    border-radius: 0.75rem;
}

.login-card .card-body {
    padding: 2rem 1.5rem;
}

@media (min-width: 576px) {
    .login-card .card-body {
        padding: 2.5rem;
    }
}