:root {
    --primary: #1739b4;
    --primary-dark: #0f2a8a;
    --primary-light: #e8ecf8;
    --secondary: #6c757d;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f6f9;
    min-height: 100vh;
}

/* Navbar */
.navbar {
    background-color: var(--primary) !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.navbar-brand {
    font-weight: 700;
    font-size: 1.1rem;
}
.navbar .nav-link {
    color: rgba(255,255,255,0.85) !important;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.2s;
}
.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: #fff !important;
    background-color: rgba(255,255,255,0.15);
}

/* Sidebar */
.sidebar {
    min-height: calc(100vh - 56px);
    background: #fff;
    border-right: 1px solid #dee2e6;
    padding-top: 1rem;
}
.sidebar .nav-link {
    color: #333;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    margin: 2px 8px;
    font-size: 0.9rem;
    transition: all 0.2s;
}
.sidebar .nav-link:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}
.sidebar .nav-link.active {
    background-color: var(--primary);
    color: #fff;
}
.sidebar .nav-link i {
    width: 24px;
    text-align: center;
    margin-right: 8px;
}

/* Cards */
.stat-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: transform 0.2s;
}
.stat-card:hover {
    transform: translateY(-2px);
}
.stat-card .card-body {
    padding: 1.25rem;
}
.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

/* Tables */
.table-container {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    padding: 1.5rem;
}
.table thead th {
    background-color: var(--primary);
    color: #fff;
    font-weight: 600;
    border: none;
    font-size: 0.85rem;
    white-space: nowrap;
}
.table tbody tr:hover {
    background-color: var(--primary-light);
}

/* Badges */
.badge-htxsnv { background-color: #28a745; }
.badge-httnv { background-color: #17a2b8; }
.badge-htnv { background-color: #ffc107; color: #333; }
.badge-khtnv { background-color: #dc3545; }
.badge-khen-thuong { background-color: #28a745; }
.badge-ky-luat { background-color: #dc3545; }

/* Login */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}
.login-card {
    width: 100%;
    max-width: 420px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    border: none;
}
.login-card .card-header {
    background: transparent;
    border: none;
    text-align: center;
    padding: 2rem 2rem 0;
}
.login-card .card-body {
    padding: 1.5rem 2rem 2rem;
}

/* Content */
.main-content {
    padding: 1.5rem;
    min-height: calc(100vh - 56px);
}

/* Detail tabs */
.nav-tabs .nav-link {
    color: var(--secondary);
    font-weight: 500;
}
.nav-tabs .nav-link.active {
    color: var(--primary);
    font-weight: 600;
    border-color: var(--primary);
    border-bottom-color: #fff;
}

/* Form */
.form-label {
    font-weight: 500;
    font-size: 0.9rem;
    color: #333;
}

/* Search bar */
.search-box {
    position: relative;
}
.search-box input {
    padding-left: 2.5rem;
    border-radius: 8px;
}
.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #adb5bd;
}

/* Pagination */
.page-link {
    color: var(--primary);
}
.page-item.active .page-link {
    background-color: var(--primary);
    border-color: var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid #dee2e6;
    }
    .main-content {
        padding: 1rem;
    }
}

/* Chart containers */
.chart-container {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    padding: 1.5rem;
}

/* Toast notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 9999;
}