@import url('https://fonts.googleapis.com/css2?family=Ubuntu+Sans:ital,wght@0,100..700;1,100..700&display=swap');

/* =============================================
   CSS Variables / Design Tokens
   ============================================= */
:root {
    --sidebar-width: 300px;
    --sidebar-bg: #fff;
    --sidebar-text: #495057;
    --sidebar-link-hover-bg: #f0f4ff;
    --sidebar-link-active-bg: #e8edff;
    --sidebar-link-active-color: #435ebe;
    --sidebar-border: #e9ecef;

    --navbar-height: 60px;
    --navbar-bg: #F4F5FF;
    --navbar-border: #e9ecef;

    --body-bg: #F4F5FF;
    --content-bg: #fff;

    --primary: #435ebe;
    --primary-light: #e8edff;

    --text-muted: #6c757d;
    --heading-color: #2c3e50;

    --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.10);

    --radius: 20px;
    --transition: 0.2s ease;

    --bs-primary-rgb: 67, 94, 190;
}

.nav-pills {
    --bs-nav-pills-border-radius: .25rem;
    --bs-nav-pills-link-active-color: #fff;
    --bs-nav-pills-link-active-bg: #6c75ca;
}

/* Dark Mode Variables */
[data-bs-theme="dark"],
body.dark {
    --sidebar-bg: #1a1d23;
    --sidebar-text: #adb5bd;
    --sidebar-link-hover-bg: #24282f;
    --sidebar-link-active-bg: #2a3058;
    --sidebar-link-active-color: #7c9cf0;
    --sidebar-border: #2c3040;

    --navbar-bg: #15171c;
    --navbar-border: #2c3040;

    --body-bg: #15171c;
    --content-bg: #1e2128;

    --primary-light: #2a3058;
    --text-muted: #868e96;
    --heading-color: #dee2e6;
}

/* =============================================
   Base / Reset
   ============================================= */
*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: 'Ubuntu Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;
    font-size: 17px;
    background-color: var(--body-bg);
    color: var(--sidebar-text);
    transition: background-color var(--transition), color var(--transition);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

/* =============================================
   App Wrapper — Flex Layout
   ============================================= */
#app {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* =============================================
   Sidebar
   ============================================= */
#sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    height: calc(100vh - 2rem);
    position: sticky;
    top: 1rem;
    left: 0;
    z-index: 1040;
    overflow-y: auto;
    overflow-x: hidden;
    background-color: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: var(--radius);
    margin: 1rem 0 1rem 1rem;
    transition: width 0.25s ease, min-width 0.25s ease, margin 0.25s ease, background-color var(--transition);
    scrollbar-width: thin;
}

#sidebar::-webkit-scrollbar {
    width: 4px;
}
#sidebar::-webkit-scrollbar-thumb {
    background: var(--sidebar-border);
    border-radius: 4px;
}

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

/* Sidebar Header / Logo */
.sidebar-header {
    padding: 3rem 2rem;
    height: var(--navbar-height);
    display: flex;
    align-items: center;
}

.sidebar-header .logo a {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
    white-space: nowrap;
}

.sidebar-toggler {
    margin-left: auto;
}

.sidebar-hide {
    font-size: 2rem;
    color: var(--sidebar-text);
    display: flex;
    align-items: center;
    padding: 0.25rem;
    border-radius: var(--radius);
    transition: background var(--transition);
    position: absolute;
    top: 0;
    right: 5px;
}

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

/* Sidebar Menu */
.sidebar-menu {
    padding: 0.75rem 0;
    flex: 1;
}

.sidebar-menu .menu {
    padding: 0 0.75rem;
}

.sidebar-item {
    margin-bottom: 2px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 0.85rem;
    border-radius: var(--radius);
    color: var(--sidebar-text);
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-link i {
    font-size: 1.1rem;
    flex-shrink: 0;
    width: 20px;
    text-align: center;
}

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

.sidebar-item.active > .sidebar-link {
    background-color: var(--sidebar-link-active-bg);
    color: var(--sidebar-link-active-color);
    font-weight: 600;
}

/* Sidebar Submenu */
.sidebar-item.has-sub > .sidebar-link::after {
    content: "\f282"; /* bi-chevron-down */
    font-family: "bootstrap-icons";
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform var(--transition);
    flex-shrink: 0;
}

.submenu {
    overflow: hidden;
    max-height: 0;
    padding: 0 0 0 1.5rem;
}

.submenu.submenu-open {
    max-height: 600px;
    padding: 0.25rem 0 0.25rem 1.5rem;
}

.submenu.submenu-closed {
    max-height: 0;
    padding: 0;
}

.sidebar-item.has-sub:has(.submenu.submenu-open) > .sidebar-link::after {
    transform: rotate(180deg);
}

.submenu-item {
    margin-bottom: 2px;
}

.submenu-item a {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.45rem 1.4rem;
    border-radius: var(--radius);
    color: var(--sidebar-text);
    font-size: 0.875rem;
    transition: background var(--transition), color var(--transition);
}

.submenu-item a i {
    font-size: 1rem;
    width: 18px;
    text-align: center;
}

.submenu-item a:hover {
    background-color: var(--sidebar-link-hover-bg);
    color: var(--primary);
}

.submenu-item.active > a {
    color: var(--sidebar-link-active-color);
    font-weight: 600;
}

/* =============================================
   Main Area
   ============================================= */
#main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--body-bg);
    transition: background-color var(--transition);
}

/* =============================================
   Navbar / Header
   ============================================= */
header {
    position: sticky;
    top: 0;
    z-index: 1030;
    background-color: var(--navbar-bg);
    border-bottom: 1px solid var(--navbar-border);
    transition: background-color var(--transition);
}

.navbar-top {
    height: var(--navbar-height);
    padding: 2.2rem 1rem;
    background-color: var(--navbar-bg) !important;
}

/* Burger button */
.burger-btn {
    color: var(--sidebar-text);
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    transition: background var(--transition), color var(--transition);
}

.burger-btn:hover {
    background-color: var(--sidebar-link-hover-bg);
    color: var(--primary);
}

/* User menu in navbar */
.user-menu {
    align-items: center;
    cursor: pointer;
    padding: 0.35rem 0.5rem;
    border-radius: var(--radius);
    transition: background var(--transition);
}

.user-menu:hover {
    background-color: var(--sidebar-link-hover-bg);
}

.user-menu .user-name h6 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--heading-color);
}

.user-menu .user-name p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Avatar */
.avatar {
    border-radius: 50%;
    overflow: hidden;
    background-color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.avatar-sm  { width: 32px;  height: 32px; }
.avatar-md  { width: 38px;  height: 38px; }
.avatar-lg  { width: 48px;  height: 48px; }
.avatar-xl  { width: 64px;  height: 64px; }

/* Dropdown */
.dropdown-menu {
    border: 1px solid var(--sidebar-border);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius);
    padding: 0.5rem;
    background-color: var(--navbar-bg);
}

.dropdown-item {
    border-radius: 6px;
    padding: 0.45rem 0.75rem;
    font-size: 0.875rem;
    color: var(--sidebar-text);
    display: flex;
    align-items: center;
    transition: background var(--transition), color var(--transition);
}

.dropdown-item:hover {
    background-color: var(--sidebar-link-hover-bg);
    color: var(--primary);
}

.dropdown-item.text-danger:hover {
    background-color: #fff0f0;
    color: #dc3545;
}

.dropdown-divider {
    border-color: var(--sidebar-border);
}

/* Theme Toggle in dropdown */
.theme-toggle {
    padding: 0.4rem 0.75rem;
    gap: 0.5rem;
    color: var(--sidebar-text);
}

/* =============================================
   Main Content
   ============================================= */
#main-content {
    flex: 1;
    padding: 2rem 1rem;
    overflow-y: auto;
}

/* Page Heading */
.page-heading {
    margin-bottom: 1.25rem;
}

.page-heading h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--heading-color);
    margin: 0;
}

.page-heading p {
    color: var(--text-muted);
    margin: 0.25rem 0 0;
    font-size: 0.875rem;
}

/* =============================================
   Cards
   ============================================= */
.card {
    border: 1px solid var(--sidebar-border);
    border-radius: var(--radius);
    background-color: var(--content-bg);
    transition: background-color var(--transition);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--sidebar-border);
    font-weight: 600;
    color: var(--heading-color);
    padding: 1rem 1.25rem;
}

.card-body {
    padding: 1.25rem;
}

/* =============================================
   Footer
   ============================================= */
footer {
    padding: 0.85rem 1.5rem;
    border-top: 1px solid var(--sidebar-border);
}
footer p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.8rem;
}

footer.position-absolute {
    position: static !important; /* override inline style, use normal flow */
}

footer .footer {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* =============================================
   Utilities
   ============================================= */
.text-gray-600 { color: #6c757d; }
.text-sm       { font-size: 0.8rem; }
.icon-mid      { vertical-align: -0.15em; }

/* Stat / Summary cards */
.stats-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

/* =============================================
   Sidebar Backdrop (mobile overlay, created by app.js)
   ============================================= */
.sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1039;
    backdrop-filter: blur(2px);
    animation: fadeIn 0.2s ease;
}

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

/* =============================================
   Responsive — Mobile
   ============================================= */
@media (max-width: 1199.98px) {
    #sidebar {
        position: fixed;
        top: 1rem;
        left: 1rem;
        transform: translateX(calc(-1 * var(--sidebar-width) - 2rem));
        transition: transform 0.25s ease;
        height: calc(100vh - 2rem);
        z-index: 1041;
        min-width: var(--sidebar-width);
        border-radius: 0 var(--radius) var(--radius) 0;
        margin: 0;
    }

    /* app.js adds .active to show, .inactive to hide */
    #sidebar.active {
        transform: translateX(-20px);
    }

    #sidebar.inactive {
        transform: translateX(calc(-1 * var(--sidebar-width) - 2rem));
    }

    #main {
        width: 100%;
    }

    .sidebar-hide {
        display: flex !important;
    }
}

@media (min-width: 1200px) {
    /* Sidebar visible by default on desktop, collapses when .inactive */
    #sidebar {
        transform: translateX(0);
    }

    #sidebar.inactive {
        width: 0;
        min-width: 0;
        border: none;
        margin: 0;
        overflow: hidden;
    }

    .sidebar-hide {
        display: none !important;
    }
}

/* =============================================
   Scrollbar (global)
   ============================================= */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #ced4da;
    border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
    background: #adb5bd;
}

/* =============================================
   Dark mode scrollbar
   ============================================= */
body.dark ::-webkit-scrollbar-thumb,
[data-bs-theme="dark"] ::-webkit-scrollbar-thumb {
    background: #3a3f50;
}

/* =============================================
   Form & Input Tweaks
   ============================================= */
.form-group {
    margin-bottom: 1rem;
}

.form-control,
.form-select {
    border-color: var(--sidebar-border);
    background-color: var(--content-bg);
    color: var(--sidebar-text);
    border-radius: 6px;
    font-size: 0.875rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(67, 94, 190, 0.15);
    background-color: var(--content-bg);
    color: var(--sidebar-text);
}

.form-label {
    font-weight: 600;
    color: var(--heading-color);
    margin-bottom: 0.35rem;
}
.form-label small {
    font-weight: normal;
    color: var(--text-muted);
}

/* =============================================
   Buttons
   ============================================= */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.btn i,
.btn svg {
    flex-shrink: 0;
    line-height: 1;
    font-size: 1em;
    vertical-align: middle;
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background-color: #364aaa;
    border-color: #364aaa;
}

/* =============================================
   Table Tweaks
   ============================================= */
.table {
    font-size: 0.875rem;
    color: var(--sidebar-text);
}

.table thead th {
    background-color: var(--sidebar-link-hover-bg);
    color: var(--heading-color);
    font-weight: 600;
    border-bottom: 2px solid var(--sidebar-border);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.table td, .table th {
    border-color: var(--sidebar-border);
    vertical-align: middle;
    font-size: 1rem;
}

/* =============================================
   DataTables
   ============================================= */
.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
    border: 1px solid var(--sidebar-border);
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    background-color: var(--content-bg);
    color: var(--sidebar-text);
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    border-radius: 6px !important;
}

/* =============================================
   Alert Tweaks
   ============================================= */
.alert {
    border-radius: var(--radius);
    font-size: 0.875rem;
    border: none;
    box-shadow: var(--shadow-sm);
}

/* =============================================
   Badge
   ============================================= */
.badge {
    font-weight: 600;
    font-size: 0.72rem;
    border-radius: 6px;
    padding: 0.3em 0.6em;
}