:root {
    --sidebar-bg: #1e293b;
    --sidebar-hover: #334155;
    --sidebar-active: #0f172a;
    --sidebar-width: 250px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f1f5f9;
    overflow-x: hidden;
}

.wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.sidebar-nav .nav-link {
    color: rgba(255, 255, 255, 0.7);
    padding: 0.75rem 1rem;
    border-left: 3px solid transparent;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.sidebar-nav .nav-link:hover {
    color: #fff;
    background: var(--sidebar-hover);
    border-left-color: #6366f1;
}

.sidebar-nav .nav-link.active {
    color: #fff;
    background: var(--sidebar-active);
    border-left-color: #6366f1;
    font-weight: 500;
}

.sidebar-nav .nav-link i {
    width: 20px;
    text-align: center;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
}

/* Cards */
.card {
    border: none;
    border-radius: 0.5rem;
}

.card-header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 0.5rem 0.5rem 0 0 !important;
}

/* Tables */
.table > :not(caption) > * > * {
    vertical-align: middle;
}

.table th {
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.table td {
    font-size: 0.9rem;
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 0.35em 0.65em;
}

/* Buttons */
.btn {
    border-radius: 0.375rem;
    font-weight: 500;
}

/* Forms */
.form-control:focus, .form-select:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.15);
}

/* Pagination */
.page-link {
    color: #475569;
    border: none;
    margin: 0 2px;
    border-radius: 0.25rem !important;
}

.page-item.active .page-link {
    background: #6366f1;
    color: #fff;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 0.5rem;
}

/* Mobile Responsive */
@media (max-width: 767.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
}

/* Custom Scrollbar */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: var(--sidebar-bg);
}

.sidebar::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}