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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6; color: #333; background-color: #f5f5f5;
}

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

/* Navigation */
.navbar { background-color: #2c3e50; color: white; padding: 1rem 0; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.nav-brand a { color: white; text-decoration: none; font-size: 1.5rem; font-weight: bold; }
.nav-menu { list-style: none; display: flex; align-items: center; margin-top: 10px; flex-wrap: wrap; }
.nav-menu li { margin-right: 20px; }
.nav-menu li.nav-right { margin-left: auto; display: flex; gap: 15px; align-items: center; }
.nav-menu a { color: white; text-decoration: none; padding: 5px 10px; border-radius: 4px; transition: background-color 0.3s; }
.nav-menu a:hover { background-color: rgba(255,255,255,0.1); }

/* Content */
.main-content { padding: 2rem 0; min-height: calc(100vh - 80px); }

/* Cards */
.card { background: white; border-radius: 8px; padding: 1.5rem; box-shadow: 0 2px 4px rgba(0,0,0,0.1); margin-bottom: 1.5rem; }
.card h2 { margin-bottom: 1rem; color: #2c3e50; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; }
.form-control { width: 100%; padding: 0.5rem; border: 1px solid #ddd; border-radius: 4px; font-size: 1rem; }
.form-control:focus { outline: none; border-color: #3498db; }
select.form-control { appearance: auto; }

/* Buttons */
.btn { display: inline-block; padding: 0.5rem 1rem; border: none; border-radius: 4px; font-size: 1rem; cursor: pointer; text-decoration: none; transition: background-color 0.3s; color: white; }
.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.875rem; }
.btn-primary { background-color: #3498db; }
.btn-primary:hover { background-color: #2980b9; }
.btn-success { background-color: #27ae60; }
.btn-success:hover { background-color: #219a52; }
.btn-danger { background-color: #e74c3c; }
.btn-danger:hover { background-color: #c0392b; }
.btn-secondary { background-color: #95a5a6; }
.btn-secondary:hover { background-color: #7f8c8d; }
.btn-warning { background-color: #ffc107; color: #212529; }
.btn-warning:hover { background-color: #e0a800; }
.btn-info { background-color: #17a2b8; }
.btn-info:hover { background-color: #138496; }

/* Tables */
.table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.table th, .table td { padding: 0.75rem; text-align: left; border-bottom: 1px solid #ddd; }
.table th { background-color: #f8f9fa; font-weight: 600; color: #495057; }
.table tr:hover { background-color: #f8f9fa; }

/* Alerts */
.alert { padding: 1rem; margin-bottom: 1rem; border-radius: 4px; }
.alert-success { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-danger { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.alert-info { background-color: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }
.alert-warning { background-color: #fff3cd; color: #856404; border: 1px solid #ffeeba; }

/* Dashboard */
.dashboard-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.stat-card { background: white; padding: 1.5rem; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); text-align: center; }
.stat-card h3 { color: #7f8c8d; font-size: 0.9rem; text-transform: uppercase; margin-bottom: 0.5rem; }
.stat-card .stat-value { font-size: 2rem; font-weight: bold; color: #2c3e50; }

/* Login */
.login-container { max-width: 400px; margin: 5rem auto; }
.login-card { background: white; padding: 2rem; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
.login-card h1 { text-align: center; margin-bottom: 2rem; color: #2c3e50; }

/* Badges */
.badge { display: inline-block; padding: 0.25rem 0.5rem; font-size: 0.875rem; font-weight: 600; border-radius: 4px; }
.badge-success { background-color: #d4edda; color: #155724; }
.badge-danger { background-color: #f8d7da; color: #721c24; }
.badge-warning { background-color: #fff3cd; color: #856404; }

/* Pagination */
.pagination { margin: 1rem 0; display: flex; list-style: none; padding: 0; gap: 0.25rem; }
.pagination .page-link { padding: 0.375rem 0.75rem; color: #007bff; background-color: #fff; border: 1px solid #dee2e6; text-decoration: none; display: block; }
.pagination .page-link:hover { color: #0056b3; background-color: #e9ecef; }
.pagination .page-item.disabled .page-link { color: #6c757d; pointer-events: none; }
.pagination .page-item.active .page-link { color: #fff; background-color: #007bff; border-color: #007bff; }

/* Checkbox Group */
.checkbox-group { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 0.5rem; }
.checkbox-group label { display: flex; align-items: center; gap: 0.5rem; font-weight: normal; }

/* Filter */
.filter-group { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.price-highlight { background-color: #fff3cd; font-weight: bold; }

/* Progress */
.progress { display: flex; height: 1rem; overflow: hidden; font-size: .75rem; background-color: #e9ecef; border-radius: .25rem; }
.progress-bar { display: flex; flex-direction: column; justify-content: center; color: #fff; text-align: center; background-color: #007bff; transition: width .6s ease; }
.progress-bar-animated { background-image: linear-gradient(45deg,rgba(255,255,255,.15) 25%,transparent 25%,transparent 50%,rgba(255,255,255,.15) 50%,rgba(255,255,255,.15) 75%,transparent 75%,transparent); background-size: 1rem 1rem; animation: progress-bar-stripes 1s linear infinite; }
@keyframes progress-bar-stripes { 0% { background-position: 1rem 0; } 100% { background-position: 0 0; } }

/* Spinner */
.spinner-border { display: inline-block; width: 2rem; height: 2rem; border: .25em solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spinner-border .75s linear infinite; }
.spinner-border-sm { width: 1rem; height: 1rem; border-width: .2em; }
@keyframes spinner-border { to { transform: rotate(360deg); } }

/* Utilities */
.d-flex { display: flex !important; }
.gap-2 { gap: 0.5rem !important; }
.gap-3 { gap: 1rem !important; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-2 { margin-bottom: 1rem; }
.text-success { color: #28a745 !important; }
.text-danger { color: #dc3545 !important; }
.text-muted { color: #6c757d !important; }

/* Responsive */
@media (max-width: 768px) {
    .nav-menu { flex-direction: column; align-items: flex-start; }
    .nav-menu li.nav-right { margin-left: 0; margin-top: 1rem; flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .dashboard-grid { grid-template-columns: 1fr; }
    .filter-group { flex-direction: column; }
}