:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --sidebar-width: 250px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--dark-color);
    color: white;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 40px;
}

.logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.nav-menu {
    list-style: none;
    flex: 1;
}

.nav-menu li {
    margin-bottom: 10px;
}

.nav-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    color: #9ca3af;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
}

.nav-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-menu .active a {
    background: var(--primary-color);
    color: white;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

.status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--danger-color);
}

.status.active {
    background: var(--success-color);
}

/* Main Content */
.main-content {
    flex: 1;
    background: var(--light-color);
    border-radius: 20px 0 0 20px;
    padding: 30px;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header h1 {
    color: var(--dark-color);
    font-size: 2rem;
}

.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
}

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

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

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

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

.btn-sm {
    padding: 5px 10px;
    font-size: 0.9rem;
}

.user-profile i {
    font-size: 2rem;
    color: var(--dark-color);
    cursor: pointer;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 20px;
}

.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.income { background: var(--success-color); }
.stat-icon.tasks { background: var(--primary-color); }
.stat-icon.messages { background: var(--warning-color); }
.stat-icon.uptime { background: var(--secondary-color); }

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
}

.stat-trend {
    font-size: 0.9rem;
}

.stat-trend.positive { color: var(--success-color); }
.stat-trend.negative { color: var(--danger-color); }

/* Charts Section */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.chart-container {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.chart-container h3 {
    margin-bottom: 20px;
    color: var(--dark-color);
}

/* Activity Section */
.activity-section, .approval-section, .quick-actions {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

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

.badge {
    background: var(--danger-color);
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.activity-list {
    max-height: 300px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-bottom: 1px solid #e5e7eb;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.activity-info h4 {
    margin-bottom: 5px;
    color: var(--dark-color);
}

.activity-time {
    font-size: 0.8rem;
    color: #6b7280;
}

/* Quick Actions */
.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.action-btn {
    background: var(--light-color);
    border: 2px solid #e5e7eb;
    padding: 20px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: all 0.3s;
}

.action-btn:hover {
    border-color: var(--primary-color);
    background: white;
    transform: translateY(-2px);
}

.action-btn i {
    font-size: 2rem;
    color: var(--primary-color);
}

/* Approval Section */
.approval-item {
    background: #fff7ed;
    border: 2px solid #fed7aa;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

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

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.close {
    float: right;
    font-size: 28px;
    cursor: pointer;
    color: var(--dark-color);
}

.modal-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    justify-content: flex-end;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
        padding: 15px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .main-content {
        border-radius: 20px 20px 0 0;
        margin-top: -20px;
    }
    
    .charts-section {
        grid-template-columns: 1fr;
    }
}