:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --critical: #7c2d12;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --radius: 12px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.navbar {
    background: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 100%);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.nav-brand i {
    font-size: 1.5rem;
    color: #60a5fa;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.nav-links a:hover,
.nav-links a.active {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.stat-icon.blue { background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%); }
.stat-icon.orange { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.stat-icon.red { background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%); }
.stat-icon.purple { background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%); }

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.stat-info p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.card-header h2 i {
    color: var(--primary);
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.filters {
    padding: 1.5rem;
    background: #f8fafc;
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-group {
    flex: 1;
    min-width: 150px;
}

.filter-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.filter-group input,
.filter-group select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.filter-group input:focus,
.filter-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: #f8fafc;
}

th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--border);
}

td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

tbody tr:hover {
    background: #f8fafc;
}

td strong {
    display: block;
    font-weight: 600;
}

td small {
    color: var(--text-light);
    font-size: 0.8rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.severity-low { background: #d1fae5; color: #065f46; }
.severity-medium { background: #fef3c7; color: #92400e; }
.severity-high { background: #fee2e2; color: #991b1b; }
.severity-critical { background: #7c2d12; color: white; }

.status-open { background: #dbeafe; color: #1e40af; }
.status-in-progress { background: #fef3c7; color: #92400e; }
.status-resolved { background: #d1fae5; color: #065f46; }
.status-closed { background: #e2e8f0; color: #475569; }

.actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.2s;
}

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

.btn-icon.delete:hover {
    background: var(--danger);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

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

.btn-secondary:hover {
    background: #475569;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.btn-outline:hover {
    background: var(--bg);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.empty-state {
    text-align: center;
    padding: 3rem !important;
    color: var(--text-light);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.form {
    padding: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-light);
    font-size: 0.8rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    margin-top: 1rem;
}

.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.5rem;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 50%, #3b82f6 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 1.5rem;
}

.login-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
}

.login-header {
    text-align: center;
    padding: 2.5rem 2rem 1.5rem;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.login-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

.login-icon i {
    font-size: 2.5rem;
    color: white;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.login-form {
    padding: 2rem;
}

.login-form .form-group {
    margin-bottom: 1.5rem;
}

.login-form .form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.login-form .form-group label i {
    color: var(--text-light);
}

.login-footer {
    text-align: center;
    padding: 1.5rem;
    background: #f8fafc;
    border-top: 1px solid var(--border);
}

.login-footer p {
    color: var(--text-light);
    font-size: 0.85rem;
}

.login-footer code {
    background: #e2e8f0;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: monospace;
}

.settings-card {
    max-width: 600px;
}

.settings-section {
    padding: 1.5rem;
}

.settings-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text);
}

.settings-section h3 i {
    color: var(--primary);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 1.5rem;
}

.detail-section {
    background: #f8fafc;
    border-radius: 8px;
    padding: 1.25rem;
}

.detail-section.full-width {
    grid-column: 1 / -1;
}

.detail-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.detail-section h3 i {
    color: var(--primary);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}

.detail-row .label {
    color: var(--text-light);
    font-size: 0.9rem;
}

.detail-row .value {
    font-weight: 500;
}

.detail-content {
    color: var(--text);
    line-height: 1.7;
}

.export-section {
    padding: 1.5rem;
}

.export-section > p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.export-filters {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.export-preview {
    margin-bottom: 1.5rem;
}

.export-preview h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.export-actions {
    text-align: center;
    padding: 2rem;
    background: #f8fafc;
    border-radius: 8px;
}

.export-note {
    margin-top: 1rem;
    color: var(--text-light);
    font-size: 0.85rem;
}

.export-note i {
    color: var(--primary);
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-links a span {
        display: none;
    }

    .container {
        padding: 1rem;
    }

    .card-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .filters {
        flex-direction: column;
    }

    .filter-group {
        min-width: 100%;
    }

    th, td {
        padding: 0.75rem;
        font-size: 0.85rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

.site-footer {
    background: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 100%);
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 1rem 2rem;
    margin-top: 2rem;
    font-size: 0.85rem;
}

.site-footer p {
    margin: 0;
}