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

body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    color: #333;
}

header {
    background: #2c3e50;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
}

nav a {
    color: white;
    text-decoration: none;
    margin-left: 1.5rem;
    padding: 0.5rem;
}

nav a:hover {
    background: #1abc9c;
    border-radius: 5px;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.products {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.product-card {
    background: white;
    border-radius: 10px;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.product-card img {
    max-width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 8px;
}

.price {
    font-size: 1.4rem;
    color: #e67e22;
    font-weight: bold;
    margin: 0.5rem 0;
}

.btn {
    display: inline-block;
    background: #3498db;
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    margin-top: 0.5rem;
}

.btn-danger {
    background: #e74c3c;
}

.btn-success {
    background: #2ecc71;
}

form {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    max-width: 500px;
    margin: 0 auto;
}

input, textarea, select {
    width: 100%;
    padding: 0.7rem;
    margin: 0.5rem 0 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
}

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

th, td {
    padding: 0.8rem;
    border-bottom: 1px solid #ddd;
    text-align: left;
}

.message {
    padding: 0.8rem;
    margin: 1rem 0;
    border-radius: 5px;
}

.success {
    background: #d4edda;
    color: #155724;
}

.error {
    background: #f8d7da;
    color: #721c24;
}