body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f6f8;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

form {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 350px;
}

h1 {
    font-size: 1.5em;
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

div {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: #555;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 0.75rem;
    background-color: black;
    border: none;
    color: white;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: darkgrey;
}

.alert {
    background-color: #f8d7da;
    color: #842029;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    border: 1px solid #f5c2c7;
}

.logo {
    width: 200px;
    height: auto;
    display: block;
    margin: 0 auto 2rem auto;
}