* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.logo {
    font-size: 28px;
    font-weight: bold;
    display: inline-block;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 25px;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background 0.3s;
}

.nav-links a:hover {
    background: rgba(255,255,255,0.2);
}

/* Form Styles */
.form-container {
    max-width: 400px;
    margin: 50px auto;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.form-container h2 {
    text-align: center;
    margin-bottom: 25px;
    color: #4a5568;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #4a5568;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 16px;
    transition: border 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: background 0.3s;
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    background: #5a67d8;
}

.btn-danger {
    background: #e53e3e;
}

.btn-danger:hover {
    background: #c53030;
}

.btn-success {
    background: #38a169;
}

.btn-success:hover {
    background: #2f855a;
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.product-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.product-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.product-info {
    padding: 20px;
}

.product-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #2d3748;
}

.product-price {
    color: #667eea;
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 15px;
}

/* Alert Messages */
.alert {
    padding: 15px;
    border-radius: 6px;
    margin: 20px 0;
}

.alert-success {
    background: #c6f6d5;
    color: #22543d;
    border: 1px solid #9ae6b4;
}

.alert-error {
    background: #fed7d7;
    color: #742a2a;
    border: 1px solid #fc8181;
}

/* Dashboard */
.dashboard-container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 30px;
    margin-top: 30px;
}

.sidebar {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

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

.sidebar-menu li {
    margin-bottom: 10px;
}

.sidebar-menu a {
    display: block;
    padding: 12px 15px;
    color: #4a5568;
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.3s;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: #edf2f7;
    color: #667eea;
}

.main-content {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* Search Bar */
.search-container {
    margin: 30px 0;
    text-align: center;
}

.search-box {
    width: 70%;
    padding: 15px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 30px;
    font-size: 16px;
    transition: all 0.3s;
}

.search-box:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Responsive */
@media (max-width: 768px) {
    .dashboard-container {
        grid-template-columns: 1fr;
    }
    
    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .nav-links {
        flex-direction: column;
        gap: 10px;
    }
}