:root {
    --sidebar-width: 250px;
    --navbar-height: 56px;
    --transition-speed: 0.3s;
}

[data-bs-theme="dark"] {
    --bg-primary: #212529;
    --bg-secondary: #1a1d20;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --border-color: #343a40;
}

[data-bs-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    transition: margin-left var(--transition-speed);
    z-index: 100;
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #495057;
    border-radius: 4px;
}

.sidebar-header {
    background: rgba(0,0,0,0.2);
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s;
    margin: 2px 0;
}

.menu-item:hover {
    background: rgba(13, 110, 253, 0.1);
    color: var(--text-primary);
}

.menu-item.active {
    background: rgba(13, 110, 253, 0.2);
    color: #0d6efd;
}

.menu-item i {
    width: 20px;
    text-align: center;
    font-size: 1.1em;
}

.main-content {
    min-height: 100vh;
    background: var(--bg-secondary);
}

.card {
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.card-header {
    background: rgba(0,0,0,0.1);
    border-bottom: 1px solid var(--border-color);
}

.table-dark {
    --bs-table-bg: transparent;
    --bs-table-hover-bg: rgba(13, 110, 253, 0.05);
}

.form-control, .form-select {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.form-control:focus, .form-select:focus {
    background: var(--bg-secondary);
    border-color: #0d6efd;
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

.input-group-text {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-outline-secondary:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.bg-gradient-primary {
    background: linear-gradient(135deg, #0d6efd, #0a58ca);
}

.bg-gradient-success {
    background: linear-gradient(135deg, #198754, #146c43);
}

.bg-gradient-info {
    background: linear-gradient(135deg, #0dcaf0, #0aa2c0);
}

.bg-gradient-warning {
    background: linear-gradient(135deg, #ffc107, #cc9a06);
}

.notification-badge {
    font-size: 10px;
    position: absolute;
    top: -2px;
    right: -4px;
}

.global-search {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 99;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

#searchResults {
    max-height: 400px;
    overflow-y: auto;
    border-radius: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

#searchResults .result-item {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.2s;
}

#searchResults .result-item:hover {
    background: rgba(13, 110, 253, 0.1);
}

#searchResults .result-item:last-child {
    border-bottom: none;
}

.pagination {
    --bs-pagination-bg: transparent;
    --bs-pagination-border-color: var(--border-color);
    --bs-pagination-color: var(--text-primary);
    --bs-pagination-hover-bg: var(--border-color);
    --bs-pagination-active-bg: #0d6efd;
    --bs-pagination-active-border-color: #0d6efd;
}

.dropdown-menu-dark {
    max-height: 300px;
    overflow-y: auto;
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #495057;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #6c757d;
}

@media (max-width: 767px) {
    .sidebar {
        position: fixed;
        margin-left: calc(-1 * var(--sidebar-width));
        z-index: 1050;
    }
    .sidebar.show {
        margin-left: 0;
    }
    .main-content {
        width: 100%;
    }
}

.alert {
    border: none;
    border-radius: 8px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

.card {
    transition: box-shadow 0.2s;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}