/* Modern Minimal Design System */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4F46E5;
    --secondary-color: #6366F1;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    --dark-color: #1F2937;
    --light-color: #F9FAFB;
    --border-color: #E5E7EB;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --sidebar-bg: #1F2937;
    --sidebar-hover: #374151;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #FFFFFF;
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
}

/* Layout */
.wrapper {
    display: flex;
    min-height: 100vh;
    background: #F9FAFB;
}

/* Sidebar */
.sidebar {
    width: 240px;
    background: var(--sidebar-bg);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: all 0.3s;
    z-index: 1000;
    border-right: 1px solid var(--border-color);
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-header h3 i {
    color: var(--primary-color);
}

.sidebar-header p {
    font-size: 12px;
    opacity: 0.7;
    margin-left: 28px;
}

.sidebar-menu {
    padding: 20px 0;
}

.sidebar-menu ul {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 5px;
}

.sidebar-menu a {
    color: #D1D5DB;
    text-decoration: none;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    transition: all 0.2s;
    font-size: 14px;
    border-radius: 6px;
    margin: 2px 8px;
}

.sidebar-menu a:hover {
    background: var(--sidebar-hover);
    color: white;
}

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

.sidebar-menu i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 240px;
    transition: all 0.3s;
    background: #F9FAFB;
    min-height: 100vh;
}

/* Header */
.header {
    background: white;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
}

.header-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

/* Content Area */
.content {
    padding: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--light-color);
}

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-header h3 i {
    font-size: 18px;
    color: var(--text-secondary);
}

.card-body {
    padding: 20px;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.2s;
}

.stat-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-icon.primary {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

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

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

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

.stat-details h4 {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-details p {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    border-radius: 8px;
}

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

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

table th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-primary);
}

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

table tbody tr:last-child td {
    border-bottom: none;
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 13px;
}

.form-group label .required {
    color: var(--danger-color);
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.2s;
    background: white;
}

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

.form-control::placeholder {
    color: #9CA3AF;
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

.form-row.three-cols {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {
    .form-row.three-cols {
        grid-template-columns: 1fr;
    }
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    background: white;
    color: var(--text-primary);
}

.btn:hover {
    background: var(--light-color);
}

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

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

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

.btn-success:hover {
    background: #059669;
    border-color: #059669;
}

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

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

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

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

.btn-secondary:hover {
    background: #4B5563;
    border-color: #4B5563;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-group {
    display: flex;
    gap: 10px;
}

/* Badges */
.badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

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

.badge-info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: rgba(72, 187, 120, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: rgba(245, 101, 101, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: rgba(237, 137, 54, 0.1);
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: rgba(66, 153, 225, 0.1);
    color: var(--info-color);
    border-left: 4px solid var(--info-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #718096;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Search Box */
.search-box {
    position: relative;
    max-width: 300px;
}

.search-box input {
    width: 100%;
    padding: 8px 36px 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    background: white;
}

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

.search-box i {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

/* Pagination */
.pagination {
    display: flex;
    gap: 5px;
    justify-content: center;
    margin-top: 20px;
}

.pagination a {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    text-decoration: none;
    color: var(--dark-color);
    font-size: 14px;
    transition: all 0.3s;
}

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

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 0;
        overflow: hidden;
    }
    
    .sidebar.active {
        width: 260px;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .header,
    .btn,
    .search-box {
        display: none !important;
    }
    
    .main-content {
        margin: 0 !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}