:root {
    --primary-color: #2980b9;
    --primary-dark: #1a5276;
    --primary-light: #5dade2;
    --accent-color: #c53030;
    --success-color: #276749;
    --warning-color: #c05621;
    --info-color: #2980b9;
    --text-dark: #2d3748;
    --text-muted: #718096;
    --bg-light: #f7fafc;
    --border-color: #e2e8f0;
}

body {
    background-color: var(--bg-light);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-dark);
}

.navbar {
    background: #dc3545 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 4px;
    margin: 0 2px;
    transition: background-color 0.2s;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    transition: box-shadow 0.2s;
    margin-bottom: 1rem;
    background: #ffffff;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stats-card {
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stats-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.card-header {
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

.card-header.bg-dark {
    background-color: var(--primary-color) !important;
}

.card-header.bg-danger {
    background-color: #6c757d !important;
    color: white !important;
}

.card-header.bg-danger h5,
.card-header.bg-danger .mb-0 {
    color: white !important;
}

.card-header.bg-info {
    background-color: #6c757d !important;
    color: white !important;
}

.card-header.bg-info h5,
.card-header.bg-info .mb-0 {
    color: white !important;
}

.card.bg-info {
    background-color: #2980b9 !important;
    border-color: #2980b9 !important;
}

.card.bg-info .card-body,
.card.bg-info .card-footer {
    background-color: #2980b9 !important;
    color: white !important;
}

.card.bg-info .card-title,
.card.bg-info h2,
.card.bg-info h6,
.card.bg-info small {
    color: white !important;
}

.card.bg-info .text-white-50 {
    color: rgba(255, 255, 255, 0.7) !important;
}

.card.bg-info .card-footer a {
    color: white !important;
}

.card.bg-primary {
    background-color: #1a5276 !important;
    border-color: #1a5276 !important;
}

.card.bg-primary .card-body,
.card.bg-primary .card-footer {
    background-color: #1a5276 !important;
    color: white !important;
}

.card.bg-primary .card-title,
.card.bg-primary h2,
.card.bg-primary h6,
.card.bg-primary small {
    color: white !important;
}

.card.bg-primary .text-white-50 {
    color: rgba(255, 255, 255, 0.7) !important;
}

.card.bg-primary .card-footer a {
    color: white !important;
}

.card-header.bg-success {
    background-color: #6c757d !important;
    color: white !important;
}

.card-header.bg-success h5,
.card-header.bg-success .mb-0 {
    color: white !important;
}

.card-header.bg-warning {
    background-color: #6c757d !important;
    color: white !important;
}

.card-header.bg-warning h4,
.card-header.bg-warning h5,
.card-header.bg-warning .mb-0 {
    color: white !important;
}

.card.bg-warning {
    background-color: #6c757d !important;
    border-color: #6c757d !important;
}

.card.bg-warning .card-body,
.card.bg-warning .card-footer {
    background-color: #6c757d !important;
    color: white !important;
}

.card.bg-warning .card-title,
.card.bg-warning h2,
.card.bg-warning h6,
.card.bg-warning small {
    color: white !important;
}

.card.bg-warning .text-white-50 {
    color: rgba(255, 255, 255, 0.7) !important;
}

.card.bg-warning .card-footer a {
    color: white !important;
}

.table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    border: none;
}

.table-dark {
    background-color: var(--primary-color) !important;
}

.table-hover tbody tr:hover {
    background-color: #edf2f7;
}

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

.btn-danger:hover {
    background-color: #9b2c2c;
    border-color: #9b2c2c;
}

.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-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.btn-warning {
    background-color: #6c757d;
    border-color: #6c757d;
    color: white;
}

.btn-warning:hover {
    background-color: #5a6268;
    border-color: #545b62;
    color: white;
}

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

.btn-success:hover {
    background-color: #1e5036;
    border-color: #1e5036;
}

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

.btn-info:hover {
    background-color: #2157a0;
    border-color: #2157a0;
    color: white;
}

.badge {
    font-size: 0.8rem;
    font-weight: 500;
}

.badge.bg-primary {
    background-color: var(--primary-color) !important;
}

.badge.bg-danger {
    background-color: var(--accent-color) !important;
}

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

.badge.bg-warning {
    background-color: #6c757d !important;
    color: white !important;
}

.badge.bg-info {
    background-color: var(--info-color) !important;
}

.bg-danger {
    background-color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.text-danger {
    color: var(--accent-color) !important;
}

.display-4 {
    font-size: 2.5rem;
    font-weight: 300;
}

.table-responsive {
    border-radius: 8px;
    overflow: hidden;
}

.alert-warning {
    background-color: #fffbeb;
    border-color: #fbbf24;
    color: #92400e;
}

.alert-info {
    background-color: #eff6ff;
    border-color: #60a5fa;
    color: #1e40af;
}

.alert-success {
    background-color: #f0fdf4;
    border-color: #4ade80;
    color: #166534;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 0.2rem rgba(26, 54, 93, 0.15);
}

.list-group-item-action:hover {
    background-color: #edf2f7;
}

.stats-card {
    border-left: 4px solid var(--primary-color);
}

.stats-card.success {
    border-left-color: var(--success-color);
}

.stats-card.warning {
    border-left-color: var(--warning-color);
}

.stats-card.info {
    border-left-color: var(--info-color);
}

.stats-card.accent {
    border-left-color: var(--accent-color);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-dark);
}

.text-muted {
    color: var(--text-muted) !important;
}

footer {
    background-color: var(--primary-dark);
    color: #a0aec0;
}

.login-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.login-card .card-header {
    background: #2980b9 !important;
    border-radius: 12px 12px 0 0 !important;
    color: white !important;
}

.login-card .card-header h4,
.login-card .card-header .mb-0 {
    color: white !important;
}

.login-btn {
    background: linear-gradient(135deg, var(--accent-color) 0%, #9b2c2c 100%);
    border: none;
    padding: 0.75rem 2rem;
    font-weight: 600;
}

.login-btn:hover {
    background: linear-gradient(135deg, #9b2c2c 0%, #742a2a 100%);
}