:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --success: #10B981;
    --danger: #EF4444;
    --warning: #F59E0B;
    --info: #3B82F6;
    --dark: #1F2937;
    --light: #F9FAFB;
    --border: #E5E7EB;
    --text: #374151;
    --text-light: #6B7280;
    --sidebar-width: 260px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--light);
}

svg {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header .logo-icon {
    width: 64px;
    height: 64px;
    color: var(--primary);
    margin-bottom: 16px;
}

.login-header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-light);
    font-size: 14px;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.alert svg {
    flex-shrink: 0;
}

.alert-error {
    background: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.login-form label svg {
    width: 16px;
    height: 16px;
    color: var(--text-light);
}

.login-form input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn svg {
    width: 18px;
    height: 18px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

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

.btn-secondary:hover {
    background: #D1D5DB;
}

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

.btn-danger:hover {
    background: #DC2626;
}

.btn-block {
    width: 100%;
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.login-footer p {
    font-size: 12px;
    color: var(--text-light);
}

/* Dashboard Layout */
.dashboard {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: white;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-header .logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.sidebar-header h2 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
}

.sidebar-nav {
    flex: 1;
    padding: 20px 12px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
    transition: all 0.2s;
}

.nav-item:hover {
    background: var(--light);
    color: var(--primary);
}

.nav-item.active {
    background: #EEF2FF;
    color: var(--primary);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--light);
    border-radius: 8px;
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 600;
}

.logout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.logout-btn:hover {
    background: #FEE2E2;
    border-color: var(--danger);
    color: var(--danger);
}

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 32px;
    max-width: calc(100vw - var(--sidebar-width));
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
}

.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
}

.page-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-input {
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    width: 300px;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon svg {
    width: 28px;
    height: 28px;
}

.stat-primary { background: #EEF2FF; color: var(--primary); }
.stat-success { background: #D1FAE5; color: var(--success); }
.stat-danger { background: #FEE2E2; color: var(--danger); }
.stat-info { background: #DBEAFE; color: var(--info); }

.stat-content h3 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--dark);
}

/* Chart */
.chart-container {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.chart-container h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 20px;
}

/* Table */
.table-container {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

.data-table thead {
    background: var(--light);
}

.data-table th {
    padding: 16px 20px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table td {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    font-size: 14px;
}

.data-table tbody tr:hover {
    background: var(--light);
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge-active { background: #D1FAE5; color: #065F46; }
.badge-inactive { background: #FEF3C7; color: #92400E; }
.badge-revoked { background: #FEE2E2; color: #991B1B; }
.badge-success { background: #D1FAE5; color: #065F46; }
.badge-failed { background: #FEE2E2; color: #991B1B; }

.text-center {
    text-align: center;
}

.action-btns {
    display: flex;
    gap: 8px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.close-btn {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-light);
    cursor: pointer;
    line-height: 1;
}

.modal form {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
}

.form-group input:disabled {
    background: var(--light);
    cursor: not-allowed;
}

.modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid var(--border);
    background: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
}

.pagination button:hover {
    background: var(--light);
}

.pagination button.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.security-section {
    background: white;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.security-section h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.alerts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.alert-item {
    padding: 16px;
    border-radius: 8px;
    border-left: 4px solid;
    display: flex;
    justify-content: space-between;
    align-items: start;
}

.alert-item.severity-1 { border-color: var(--info); background: #EFF6FF; }
.alert-item.severity-2 { border-color: var(--warning); background: #FEF3C7; }
.alert-item.severity-3 { border-color: var(--danger); background: #FEE2E2; }

.alert-item-content h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.alert-item-content p {
    font-size: 13px;
    color: var(--text-light);
}

.alert-item-time {
    font-size: 12px;
    color: var(--text-light);
}

/* Active Sessions Section */
.active-sessions-section {
    background: white;
    border-radius: 12px;
    padding: 24px;
    margin-top: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.active-sessions-section .section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.active-sessions-section .section-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
}

.active-sessions-section tr.session-active {
    background: #F0FDF4;
    border-left: 3px solid var(--success);
}

.active-sessions-section tr.session-active:hover {
    background: #DCFCE7;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .main-content {
        margin-left: 0;
        max-width: 100vw;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .page-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .search-input {
        width: 100%;
    }
}