:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --danger-color: #dc3545;
    --danger-hover: #c82333;
    --background-color: #f8f9fa;
    --card-background: #ffffff;
    --text-color: #343a40;
    --text-light: #6c757d;
    --border-color: #dee2e6;
    --font-family: 'Poppins', sans-serif;
    --card-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    --border-radius: 12px;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: auto;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.app-header h1 {
    font-size: 2em;
    font-weight: 600;
    color: var(--text-color);
}

.search-container input {
    width: 300px;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1em;
    transition: box-shadow 0.3s ease;
}

.search-container input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
    border-color: var(--primary-color);
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
}

.card {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 25px;
    height: 100%;
}

.card-title {
    font-size: 1.5em;
    font-weight: 500;
    margin-top: 0;
    margin-bottom: 20px;
}

.forms-section {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-light);
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    box-sizing: border-box;
    transition: box-shadow 0.3s ease;
}

.form-group input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
    border-color: var(--primary-color);
}

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

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

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

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

.table-container {
    overflow-x: auto;
}

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

#inventory-table th, #inventory-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

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

#inventory-table th {
    font-weight: 600;
    color: var(--text-color);
}

#inventory-table tbody tr:hover {
    background-color: rgba(0, 123, 255, 0.05);
}

#inventory-table td strong {
    font-size: 1.2em;
    color: var(--primary-color);
}

@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .search-container input {
        width: 100%;
        box-sizing: border-box;
    }
}