/* Global Styles */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --sidebar-width: 260px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f8fafc;
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    padding: 20px 0;
    color: #fff;
    z-index: 1000;
    transition: all 0.3s ease;
    overflow-y: auto;
}

.sidebar-header {
    padding: 0 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-header h4 {
    margin: 0;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-user {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-user .user-info {
    flex: 1;
}

.sidebar-user .user-name {
    font-weight: 600;
    font-size: 14px;
}

.sidebar-user .user-role {
    font-size: 12px;
    opacity: 0.7;
}

.sidebar .nav {
    padding: 20px 0;
}

.sidebar .nav-item {
    margin: 2px 0;
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.7);
    padding: 12px 20px;
    border-radius: 0;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar .nav-link:hover {
    color: #fff;
    background: rgba(255,255,255,0.05);
    border-left-color: var(--primary-color);
}

.sidebar .nav-link.active {
    color: #fff;
    background: rgba(255,255,255,0.1);
    border-left-color: var(--primary-color);
}

.sidebar .nav-link i {
    width: 24px;
    margin-right: 10px;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 30px;
    min-height: 100vh;
    transition: all 0.3s ease;
}

/* Cards */
.card {
    border: none;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    transition: all 0.3s ease;
    background: #fff;
}

.card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    padding: 20px 24px;
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

/* Stat Cards */
.stat-card {
    border-radius: 16px;
    padding: 0;
    overflow: hidden;
}

.stat-card .card-body {
    padding: 20px 24px;
    position: relative;
}

.stat-card .stat-icon {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 32px;
    opacity: 0.2;
}

.stat-card .stat-number {
    font-weight: 700;
    font-size: 28px;
    margin-bottom: 4px;
}

.stat-card.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.stat-card.success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
}

.stat-card.warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: #fff;
}

.stat-card.info {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: #fff;
}

/* Forms */
.form-control, .form-select {
    border-radius: 10px;
    border: 2px solid #e2e8f0;
    padding: 10px 14px;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-label {
    font-weight: 600;
    color: #1e293b;
}

/* Buttons */
.btn {
    border-radius: 10px;
    padding: 10px 20px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border: none;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

/* Tables */
.table {
    margin-bottom: 0;
}

.table th {
    border-top: none;
    font-weight: 600;
    color: #64748b;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    vertical-align: middle;
    padding: 12px 8px;
}

/* Notifications */
.notification-item {
    padding: 12px 0;
    transition: all 0.3s ease;
    cursor: pointer;
}

.notification-item.unread {
    background: rgba(102, 126, 234, 0.05);
    border-left: 3px solid var(--primary-color);
    padding-left: 12px;
}

.notification-item:hover {
    background: rgba(0,0,0,0.02);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: 20px 15px;
    }
    
    .mobile-toggle {
        display: block !important;
    }
}

.mobile-toggle {
    display: none;
    position: fixed;
    top: 15px;
    left: 15px;
    z-index: 1001;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 20px;
}

/* Alerts */
.alert {
    border-radius: 12px;
    border: none;
}

/* Progress Bar */
.progress {
    border-radius: 8px;
    background: #e2e8f0;
}

.progress-bar {
    border-radius: 8px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

/* Badges */
.badge {
    padding: 6px 12px;
    font-weight: 500;
    border-radius: 8px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

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