body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.container {
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 90%;
    max-width: 400px;
}
input {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    text-transform: uppercase;
}
button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
    font-size: 14px;
    margin-top: 10px;
}
.error { color: #e74c3c; }
.success { color: #27ae60; }
.warning { color: #f39c12; }
.info { color: #3498db; }