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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #ffffff;
    color: #000000;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: #000000;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
    padding: 15px 0;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
}

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

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    border: none;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-primary {
    background: #000000;
    color: #ffffff;
}

.btn-primary:hover {
    background: #333333;
}

.btn-secondary {
    background: #f3f4f6;
    color: #000000;
}

.btn-secondary:hover {
    background: #e5e7eb;
}

.btn-danger {
    background: #dc2626;
    color: #ffffff;
}

.btn-danger:hover {
    background: #b91c1c;
}

.btn-success {
    background: #16a34a;
    color: #ffffff;
}

.btn-success:hover {
    background: #15803d;
}

.layout {
    display: flex;
    min-height: calc(100vh - 70px);
}

.sidebar {
    width: 250px;
    background: #f9fafb;
    border-right: 1px solid #e5e7eb;
    padding: 20px 0;
}

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

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

.sidebar-menu a {
    display: block;
    padding: 12px 20px;
    color: #000000;
    transition: all 0.3s;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: #000000;
    color: #ffffff;
}

.sidebar-menu .dropdown {
    position: relative;
}

.sidebar-menu .dropdown-content {
    display: none;
    background: #ffffff;
    padding-left: 20px;
}

.sidebar-menu .dropdown:hover .dropdown-content {
    display: block;
}

.sidebar-menu .dropdown-content a {
    padding: 10px 20px;
    font-size: 14px;
}

.main-content {
    flex: 1;
    padding: 30px;
}

.card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
}

.card-header {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e5e7eb;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #d1d5db;
    border-radius: 5px;
    font-size: 14px;
}

.form-control:focus {
    outline: none;
    border-color: #000000;
}

.form-control select {
    cursor: pointer;
}

.alert {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #86efac;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #93c5fd;
}

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

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.table th {
    background: #f9fafb;
    font-weight: 600;
}

.table tr:hover {
    background: #f9fafb;
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.status-active {
    background: #dcfce7;
    color: #166534;
}

.status-inactive {
    background: #fee2e2;
    color: #991b1b;
}

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

.stat-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 25px;
    text-align: center;
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    margin: 10px 0;
}

.stat-label {
    color: #6b7280;
    font-size: 14px;
}

.hero {
    background: linear-gradient(135deg, #000000 0%, #333333 100%);
    color: #ffffff;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-btn {
    background: #ffffff;
    color: #000000;
    padding: 15px 40px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s;
}

.hero-btn:hover {
    background: #f3f4f6;
    transform: translateY(-2px);
}

.auth-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
}

.auth-title {
    text-align: center;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 30px;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
}

.auth-footer a {
    color: #000000;
    font-weight: 500;
}

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

.modal.active {
    display: flex;
}

.modal-content {
    background: #ffffff;
    border-radius: 8px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-title {
    font-size: 20px;
    font-weight: bold;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #6b7280;
}

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

.pagination a,
.pagination span {
    padding: 8px 12px;
    border: 1px solid #e5e7eb;
    border-radius: 5px;
}

.pagination a:hover {
    background: #f9fafb;
}

.pagination .active {
    background: #000000;
    color: #ffffff;
    border-color: #000000;
}

@media (max-width: 768px) {
    .layout {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 32px;
    }
}