:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-primary: #1e3a5f;
    --color-primary-hover: #0f2744;
    --color-success: #059669;
    --color-warning: #d97706;
    --color-danger: #dc2626;
    --color-info: #0891b2;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

* {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
    line-height: 1.5;
}

.navbar {
    background-color: var(--color-primary);
    border-bottom: none;
    padding: 0.75rem 0;
}

.navbar-brand {
    font-weight: 600;
    color: #ffffff !important;
    font-size: 1rem;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.15s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #ffffff !important;
    background-color: rgba(255, 255, 255, 0.15);
}

.navbar-toggler {
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--color-border);
    font-weight: 600;
    padding: 0.875rem 1rem;
}

.table {
    font-size: 0.875rem;
    margin-bottom: 0;
}

.table thead th {
    background-color: var(--color-primary);
    border-bottom: 1px solid var(--color-primary);
    font-weight: 600;
    color: #ffffff;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 0.75rem 1rem;
}

.table-dark thead th {
    background-color: var(--color-primary);
    color: #ffffff;
}

.table tbody td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--color-border);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: #f9fafb;
}

.table-hover tbody tr:hover {
    background-color: #f1f5f9;
}

.table-danger {
    background-color: #fef2f2 !important;
}

.table-warning {
    background-color: #fffbeb !important;
}

.table-info {
    background-color: #ecfeff !important;
}

.btn {
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.15s ease;
}

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

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

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

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

.btn-outline-success:hover {
    background-color: var(--color-success);
    color: white;
}

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

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

.btn-sm {
    padding: 0.375rem 0.625rem;
    font-size: 0.8125rem;
}

.badge {
    font-weight: 500;
    font-size: 0.75rem;
    padding: 0.35em 0.65em;
    border-radius: 4px;
}

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

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

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

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

.bg-secondary {
    background-color: #6b7280 !important;
}

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

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

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

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

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

.alert {
    border-radius: 8px;
    font-size: 0.875rem;
    padding: 0.875rem 1rem;
}

.alert-success {
    background-color: #ecfdf5;
    border-color: #a7f3d0;
    color: #065f46;
}

.alert-danger {
    background-color: #fef2f2;
    border-color: #fecaca;
    color: #991b1b;
}

.alert-info {
    background-color: #ecfeff;
    border-color: #a5f3fc;
    color: #155e75;
}

.alert-warning {
    background-color: #fffbeb;
    border-color: #fde68a;
    color: #92400e;
}

.nav-tabs {
    border-bottom: 1px solid var(--color-border);
}

.nav-tabs .nav-link {
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.875rem;
    border: none;
    border-bottom: 2px solid transparent;
    padding: 0.75rem 1rem;
    margin-bottom: -1px;
}

.nav-tabs .nav-link:hover {
    color: var(--color-text);
    border-color: transparent;
}

.nav-tabs .nav-link.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    background-color: transparent;
}

.form-control, .form-select {
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
}

.form-control:focus, .form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.form-label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--color-text);
}

.modal-content {
    border: none;
    border-radius: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.modal-header {
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.25rem;
}

.modal-body {
    padding: 1.25rem;
}

.modal-footer {
    border-top: 1px solid var(--color-border);
    padding: 1rem 1.25rem;
}

footer {
    border-top: 1px solid var(--color-border);
    background-color: var(--color-surface);
}

h1, .h1, h2, .h2, h3, .h3 {
    font-weight: 600;
    color: var(--color-text);
}

.h3 {
    font-size: 1.25rem;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    color: var(--color-primary-hover);
}

.border-danger {
    border-color: #fca5a5 !important;
}

.border-warning {
    border-color: #fcd34d !important;
}

.border-info {
    border-color: #67e8f9 !important;
}

.border-success {
    border-color: #86efac !important;
}

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

.bg-danger.bg-opacity-10,
.bg-danger.bg-opacity-25 {
    background-color: rgba(220, 38, 38, 0.1) !important;
}

.bg-warning.bg-opacity-25 {
    background-color: rgba(217, 119, 6, 0.15) !important;
}

.bg-info.bg-opacity-10,
.bg-info.bg-opacity-25 {
    background-color: rgba(8, 145, 178, 0.1) !important;
}

.status-filter-card {
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.status-filter-card:hover {
    transform: translateY(-2px);
}

.status-filter-card.ring {
    box-shadow: 0 0 0 3px var(--color-primary);
}

.ring-primary {
    box-shadow: 0 0 0 3px var(--color-primary);
}

.dropdown-menu {
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}