:root {
    /* Modern Light Palette - Inspired by Tailwind UI & Modern SaaS */
    --primary-color: #4f46e5;
    /* Indigo 600 */
    --primary-hover: #4338ca;
    /* Indigo 700 */
    --secondary-color: #64748b;
    /* Slate 500 */
    --background-body: #f3f4f6;
    /* Gray 100 */
    --background-card: #ffffff;
    --text-main: #111827;
    /* Gray 900 */
    --text-secondary: #6b7280;
    /* Gray 500 */
    --border-color: #e5e7eb;
    /* Gray 200 */
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --sidebar-width: 260px;
    --header-height: 70px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --transition-speed: 0.3s;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background-body);
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 1.5;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-main);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-hover);
}

/* Layout Wrapper */
#wrapper {
    display: flex;
    width: 100%;
}

/* Sidebar Modernization */
#sidebar-wrapper {
    min-height: 100vh;
    margin-left: -16rem;
    transition: margin var(--transition-speed) ease-in-out;
    background-color: #ffffff;
    border-right: 1px solid var(--border-color);
    width: 16rem;
    flex-shrink: 0;
    position: fixed;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    overflow-y: auto;
    overflow-x: hidden;
    height: 100vh;
    /* Critical for scroll */
    padding-bottom: 2rem;
    /* Avoid cutting off bottom content */
}

#sidebar-wrapper .sidebar-heading {
    padding: 1.5rem;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background-color: #ffffff;
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 10;
}

.list-group-item {
    border: none;
    padding: 1rem 1.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    background-color: transparent !important;
    transition: all 0.2s;
    margin: 0;
    border-radius: 0;
    display: flex;
    align-items: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border-left: 4px solid transparent;
}

.list-group-item i {
    width: 24px;
    margin-right: 0.75rem;
    text-align: center;
    font-size: 1.1rem;
}

.list-group-item:hover {
    color: var(--primary-color);
    background-color: #f9fafb !important;
    /* Very subtle hover */
}

.list-group-item.active {
    color: var(--primary-color);
    background-color: #f3f4f6 !important;
    /* Subtle active bg */
    border-left-color: var(--primary-color);
    font-weight: 600;
}

/* Page Content */
#page-content-wrapper {
    width: 100%;
    margin-left: 0;
    transition: margin var(--transition-speed) ease-in-out;
    padding-left: 0;
    /* Mobile default */
}

/* Sidebar Toggle Logic */
body.sb-sidenav-toggled #sidebar-wrapper {
    margin-left: 0;
    /* Show on request */
}

@media (min-width: 768px) {
    #sidebar-wrapper {
        margin-left: 0;
        /* Always show on desktop */
        position: fixed;
    }

    #page-content-wrapper {
        margin-left: 16rem;
        /* Push content */
        width: calc(100% - 16rem);
    }

    body.sb-sidenav-toggled #sidebar-wrapper {
        margin-left: -16rem;
        /* Hide when toggled */
    }

    body.sb-sidenav-toggled #page-content-wrapper {
        margin-left: 0;
        width: 100%;
    }
}

/* Header / Navbar */
.navbar {
    background-color: #ffffff;
    box-shadow: var(--shadow-sm);
    height: var(--header-height);
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.navbar .btn-outline-light {
    /* Overriding bootstrap outline light for the toggle button since bg is white now */
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.navbar .btn-outline-light:hover {
    background-color: var(--background-body);
    color: var(--primary-color);
}

.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
}

/* Cards */
.card-custom {
    background-color: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s, transform 0.2s;
    overflow: hidden;
}

.card-custom:hover {
    box-shadow: var(--shadow-md);
}

.card-body {
    padding: 1.5rem;
}

/* Dashboard Modern Updates */
.card-stat {
    border: none;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s;
    background: #fff;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
}

.card-stat:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-stat .icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.card-stat .stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.2;
}

.card-stat .stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-stat .stat-trend {
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 0.5rem;
    display: inline-flex;
    align-items: center;
}

.card-stat.primary .icon-wrapper {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

.card-stat.success .icon-wrapper {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.card-stat.info .icon-wrapper {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.card-stat.warning .icon-wrapper {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}


/* Forms */
.form-control,
.form-select {
    border: 1px solid #d1d5db;
    /* Gray 300 */
    border-radius: 0.5rem;
    padding: 0.625rem 1rem;
    color: var(--text-main);
    background-color: #fff;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    outline: 0;
}

.form-label {
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

/* Buttons */
.btn {
    padding: 0.625rem 1.25rem;
    font-weight: 600;
    border-radius: 0.5rem;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: #fff;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--background-body);
    color: var(--text-main);
    border-color: #d1d5db;
}

/* Tables */
.table {
    color: var(--text-main);
    margin-bottom: 0;
}

.table thead th {
    background-color: #f9fafb;
    /* Gray 50 */
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
}

.table tbody td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: #f9fafb;
}

/* Mobile Cards for Tables */
@media (max-width: 768px) {
    .table-view {
        display: none;
    }

    .user-card-view {
        display: grid;
        gap: 1rem;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }

    .user-card {
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 1.5rem;
        box-shadow: var(--shadow-sm);
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .user-card img {
        width: 80px;
        height: 80px;
        border-radius: 50%;
        object-fit: cover;
        margin-bottom: 1rem;
        border: 2px solid var(--border-color);
    }
}

@media (min-width: 769px) {
    .user-card-view {
        display: none;
    }

    .table-view {
        display: block;
    }
}

/* Permissions Mobile View */
.perm-card-view {
    display: none;
}

@media (max-width: 768px) {
    .perm-table-view {
        display: none;
    }

    .perm-card-view {
        display: flex;
        /* Or grid if we wanted */
        flex-direction: column;
        gap: 1rem;
    }

    .perm-card {
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 1rem;
        box-shadow: var(--shadow-sm);
    }

    .perm-card-header {
        font-weight: 700;
        color: var(--text-main);
        font-size: 1.1rem;
        margin-bottom: 1rem;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 0.5rem;
    }

    .perm-card .form-check {
        margin-bottom: 0.75rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        padding-left: 0;
    }

    .perm-card .form-check-label {
        margin-left: 0;
    }

    .perm-card .form-check-input {
        float: none;
        margin-left: 10px;
        width: 2.5em;
        height: 1.25em;
    }
}

@media (min-width: 769px) {
    .perm-card-view {
        display: none;
    }

    .perm-table-view {
        display: block;
    }
}

/* Login Page Specific */
.login-page {
    background-color: #f3f4f6;
    background-image: radial-gradient(#e5e7eb 1px, transparent 1px);
    background-size: 20px 20px;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    width: 100%;
    max-width: 450px;
    border: 1px solid var(--border-color);
}

.login-header {
    margin-bottom: 2rem;
    text-align: center;
}

.login-header h2 {
    color: var(--primary-color);
    font-size: 1.875rem;
}