:root {
    --primary-color: #4e73df;
    --primary-dark: #2e59d9;
    --secondary-color: #858796;
    --success-color: #1cc88a;
    --info-color: #36b9cc;
    --warning-color: #f6c23e;
    --danger-color: #e74a3b;
    --light-color: #f8f9fc;
    --dark-color: #5a5c69;
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 70px;
    --transition-speed: 0.3s;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--light-color);
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    padding-left: var(--sidebar-width);
    transition: padding-left var(--transition-speed);
    min-height: 100vh;
}

body.sidebar-collapsed {
    padding-left: var(--sidebar-collapsed-width);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    z-index: 1000;
    transition: width var(--transition-speed);
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
    overflow-x: hidden;
    overflow-y: auto;
}

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

.sidebar-brand {
    height: 70px;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-brand-icon {
    font-size: 1.5rem;
    margin-right: 0.75rem;
    transition: margin var(--transition-speed);
}

.sidebar-brand-text {
    font-size: 1.1rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    transition: opacity var(--transition-speed);
}

.sidebar.collapsed .sidebar-brand-icon {
    margin-right: 0;
}

.sidebar.collapsed .sidebar-brand-text {
    opacity: 0;
    width: 0;
}

.sidebar-divider {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin: 0.75rem 0;
}

.sidebar-heading {
    padding: 0 1rem;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    color: rgba(255, 255, 255, 0.5);
    white-space: nowrap;
    overflow: hidden;
    transition: opacity var(--transition-speed);
}

.sidebar.collapsed .sidebar-heading {
    opacity: 0;
}

.sidebar .nav-item {
    position: relative;
}

.sidebar .nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 600;
    white-space: nowrap;
    transition: all var(--transition-speed);
    text-decoration: none;
}

.sidebar .nav-link:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.1);
}

.sidebar .nav-link.active {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: 700;
}

.sidebar .nav-link i {
    font-size: 1rem;
    margin-right: 0.75rem;
    transition: margin var(--transition-speed);
}

.sidebar.collapsed .nav-link i {
    margin-right: 0;
    font-size: 1.25rem;
}

.sidebar .nav-link span {
    transition: opacity var(--transition-speed);
}

.sidebar.collapsed .nav-link span {
    opacity: 0;
    width: 0;
}

.sidebar.collapsed .nav-item:not(.dropdown):hover > .nav-link span {
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
    opacity: 1;
    visibility: visible;
    z-index: 1100;
    margin-left: 10px;
    min-width: 200px;
    text-align: left;
    width: auto;
}

/* Sidebar Toggle */
.sidebar-toggle {
    position: fixed;
    bottom: 0.15rem;
    left: calc(var(--sidebar-width) - 2.5rem);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    border: 0px solid rgba(231, 228, 228, 1);
    background-color: var(--primary-dark);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1001;
    transition: left var(--transition-speed);
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
}

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

body.sidebar-collapsed .sidebar-toggle {
    left: calc(var(--sidebar-collapsed-width) - 1.25rem);
    border: 1px solid rgba(231, 228, 228, 1);
}

/* Topbar */
.topbar {
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    height: 70px;
    background-color: white;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 0 1.5rem;
    z-index: 999;
    transition: left var(--transition-speed);
}

body.sidebar-collapsed .topbar {
    left: var(--sidebar-collapsed-width);
}

.topbar-divider {
    width: 0;
    border-right: 1px solid #e3e6f0;
    height: 2rem;
    margin: auto 1rem;
}

.user-profile {
    display: flex;
    align-items: center;
}

.user-info {
    display: flex;
    flex-direction: column;
    text-align: right;
    margin-right: 0.75rem;
}

.user-name {
    font-weight: 700;
    color: var(--dark-color);
    font-size: 0.9rem;
}

.user-role {
    font-size: 0.75rem;
    color: var(--secondary-color);
}

/* Content */
.content-wrapper {
    padding: 1.5rem;
    margin-top: 70px;
}

/* Page header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark-color);
    margin: 0;
}

/* Cards */
.card {
    border: none;
    border-radius: 0.35rem;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: #f8f9fc;
    border-bottom: 1px solid #e3e6f0;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h6 {
    margin: 0;
    font-weight: 700;
    color: var(--primary-color);
}

/* Table */
.table {
    color: #5a5c69;
    margin-bottom: 0;
}

.table th {
    background-color: #f8f9fc;
    color: #4e73df;
    font-weight: 700;
    text-align: center;
    vertical-align: middle;
    border-color: #e3e6f0;
}

.table td {
    vertical-align: middle;
    border-color: #e3e6f0;
}

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

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

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

.btn-success:hover {
    background-color: #17a673;
    border-color: #17a673;
}

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

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

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

/* Toggle Switch */
.form-switch .form-check-input:checked {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

/* Modal */
.modal-header {
    background-color: #f8f9fc;
    border-bottom: 1px solid #e3e6f0;
}

.modal-header .modal-title {
    font-weight: 700;
    color: var(--primary-color);
}

.modal-footer {
    border-top: 1px solid #e3e6f0;
}

/* Badge */
.badge-primary {
    background-color: var(--primary-color);
}

.badge-success {
    background-color: var(--success-color);
}

.badge-danger {
    background-color: var(--danger-color);
}

.badge-warning {
    background-color: var(--warning-color);
    color: white;
}

/* DataTable adjustments */
.dataTables_wrapper .dataTables_filter input {
    border: 1px solid #d1d3e2;
    border-radius: 0.35rem;
    padding: 0.375rem 0.75rem;
}

.dataTables_wrapper .dataTables_length select {
    border: 1px solid #d1d3e2;
    border-radius: 0.35rem;
    padding: 0.375rem 0.75rem;
}

/* Progress */
.progress {
    border-radius: 0.35rem;
}

/* Alert */
.alert {
    border-radius: 0.35rem;
    border: none;
}

/* Login specific */
.login-page {
    padding-left: 0;
}

.login-page body {
    padding-left: 0;
}

.login-card {
    max-width: 420px;
    width: 100%;
}

.login-icon {
    font-size: 3rem;
    color: var(--primary-color);
}

/* Mobile adjustments */
@media (max-width: 768px) {
    body {
        padding-left: 0;
    }

    body.sidebar-collapsed {
        padding-left: 0;
    }

    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .topbar {
        left: 0;
    }

    body.sidebar-collapsed .topbar {
        left: 0;
    }

    .sidebar-toggle {
        left: 1rem;
        top: 1rem;
        bottom: auto;
    }

    body.sidebar-collapsed .sidebar-toggle {
        left: 1rem;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

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