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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header h1 {
    color: #2c3e50;
    margin-bottom: 10px;
}

.header p {
    color: #7f8c8d;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    text-align: center;
}

.alert.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.vendor-form {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.form-section {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #ecf0f1;
}

.form-section h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #bdc3c7;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #2c3e50;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 2px solid #bdc3c7;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #7f8c8d;
    font-size: 12px;
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox input {
    width: auto;
    margin-top: 5px;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background: #27ae60;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: #219a52;
}

@media (max-width: 768px) {
    .row {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 10px;
    }
    
    .vendor-form {
        padding: 20px;
    }
}