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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --dark-lighter: #334155;
    --light: #f1f5f9;
    --border: #334155;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--dark);
    color: #e2e8f0;
    line-height: 1.6;
}

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

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: var(--dark-light);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 5px;
}

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

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #cbd5e1;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: #e2e8f0;
    font-size: 14px;
    transition: border-color 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 14px;
}

.login-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.login-footer p {
    font-size: 12px;
    color: var(--secondary);
    margin-bottom: 5px;
}

.login-footer .warning {
    color: var(--warning);
    font-weight: 600;
}

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

.sidebar {
    width: 260px;
    background: var(--dark-light);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.logo {
    padding: 30px 20px;
    border-bottom: 1px solid var(--border);
}

.logo h2 {
    color: var(--primary);
    font-size: 24px;
}

.nav-menu {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #94a3b8;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
    cursor: pointer;
}

.nav-item span {
    margin-right: 12px;
    font-size: 20px;
}

.nav-item:hover {
    background: rgba(99, 102, 241, 0.1);
    color: #e2e8f0;
}

.nav-item.active {
    background: rgba(99, 102, 241, 0.15);
    border-left-color: var(--primary);
    color: #e2e8f0;
}

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

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 10px;
}

.user-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.user-role {
    font-size: 12px;
    color: var(--secondary);
    text-transform: uppercase;
}

.btn-logout {
    width: 100%;
    padding: 8px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 10px;
    font-size: 13px;
    transition: opacity 0.3s;
    text-decoration: none;
    display: block;
    text-align: center;
}

.btn-logout:hover {
    opacity: 0.9;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.header {
    padding: 30px 40px;
    background: var(--dark-light);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 28px;
}

.header-actions {
    display: flex;
    gap: 10px;
}

.btn-refresh {
    padding: 10px 20px;
    background: var(--dark);
    color: #e2e8f0;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

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

.content {
    flex: 1;
    overflow-y: auto;
    padding: 40px;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--dark-light);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    font-size: 36px;
    width: 60px;
    height: 60px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.stat-label {
    font-size: 14px;
    color: var(--secondary);
}

/* Section */
.section {
    margin-bottom: 30px;
}

.section h2 {
    font-size: 20px;
    margin-bottom: 20px;
}

/* Table */
.table-container {
    background: var(--dark-light);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

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

thead {
    background: var(--dark);
}

th {
    padding: 16px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    color: var(--secondary);
    text-transform: uppercase;
}

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

tr:hover {
    background: rgba(99, 102, 241, 0.05);
}

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

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.badge-primary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

/* Buttons */
.btn-sm {
    padding: 6px 12px;
    border: none;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: opacity 0.3s;
    margin-right: 5px;
    text-decoration: none;
    display: inline-block;
}

.btn-sm:hover {
    opacity: 0.8;
}

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

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

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

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--secondary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark);
}

::-webkit-scrollbar-thumb {
    background: var(--dark-lighter);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .dashboard {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}