* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Arial, sans-serif;
}
body {
    margin: 0;
    padding: 20px;
    background-color: #f5f7fb;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
.login-container {
    max-width: 400px;
    width: 100%;
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}
.header {
    margin-bottom: 30px;
}
h1 {
    color: #4a6fdc;
    margin: 0 0 10px 0;
}
.logo {
    max-width: 200px;
    margin-bottom: 20px;
}
.login-btn {
    background-color: #4a6fdc;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
    margin-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
}
.login-btn:hover {
    background-color: #3a5fc0;
}
.microsoft-logo {
    width: 20px;
    height: 20px;
    margin-right: 10px;
}
.error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 4px;
}