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

:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --success-color: #4caf50;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --info-color: #2196f3;
    --light-color: #f4f4f4;
    --dark-color: #333;
    --gray-color: #757575;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 24px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-name {
    font-weight: bold;
    color: var(--dark-color);
}

/* Navigation */
.navbar {
    background: var(--primary-color);
    padding: 10px 0;
}

.nav-menu {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 0 20px;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    display: block;
    transition: background 0.3s;
    border-radius: 5px;
}

.nav-link:hover {
    background: var(--secondary-color);
}

.dropdown-content {
    display: none;
    position: absolute;
    background: white;
    min-width: 300px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    z-index: 1;
    border-radius: 5px;
}

.nav-item:hover .dropdown-content {
    display: block;
}

.dropdown-content a {
    color: var(--dark-color);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    transition: background 0.3s;
}

.dropdown-content a:hover {
    background: var(--light-color);
}

/* Cards */
.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 15px 20px;
    font-weight: bold;
    font-size: 18px;
}

.card-body {
    padding: 20px;
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--dark-color);
}

input, select, textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

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

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

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

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

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

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

/* Tables */
.table-container {
    overflow-x: auto;
}

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

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background: var(--light-color);
    font-weight: 600;
    color: var(--dark-color);
}

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

/* Search Box */
.search-box {
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
}

.search-box input {
    flex: 1;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.search-box button {
    padding: 12px 30px;
}

/* Dashboard Stats */
.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: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-card h3 {
    color: var(--gray-color);
    font-size: 14px;
    margin-bottom: 10px;
}

.stat-card .number {
    font-size: 32px;
    font-weight: bold;
    color: var(--primary-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    width: 90%;
    max-width: 800px;
    border-radius: 10px;
    animation: modalopen 0.3s;
}

@keyframes modalopen {
    from {opacity: 0; transform: translateY(-50px);}
    to {opacity: 1; transform: translateY(0);}
}

.modal-header {
    padding: 15px 20px;
    background: var(--primary-color);
    color: white;
    border-radius: 10px 10px 0 0;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 15px 20px;
    border-top: 1px solid #ddd;
    text-align: right;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-menu {
        flex-direction: column;
    }
    
    .dropdown-content {
        position: static;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    table {
        font-size: 12px;
    }
    
    th, td {
        padding: 8px;
    }
}

/* Print Styles */
@media print {
    .header, .navbar, .btn, .search-box, .no-print {
        display: none;
    }
    
    .container {
        padding: 0;
    }
    
    .card {
        box-shadow: none;
    }
}

/* Autocomplete */
.autocomplete-items {
    position: absolute;
    border: 1px solid #ddd;
    border-top: none;
    z-index: 99;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 200px;
    overflow-y: auto;
    background: white;
}

.autocomplete-item {
    padding: 10px;
    cursor: pointer;
}

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