body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(to bottom, #1d252d, #4e5d85, #404c7a);
    margin: 0;
}

form {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    width: 350px;
}

h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-size: 24px;
    font-weight: 600;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

input[type="text"],
input[type="password"] {
    width: calc(100% - 22px);
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 16px;
}

input[type="submit"] {
    background-color: #2f3640;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

input[type="submit"]:hover {
    background-color: #43518c;
}

a {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: #5564aa;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

a:hover {
    color: #43518c;
}

.error-message {
    background-color: #ffe5e5;
    color: #b10000;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    font-size: 14px;
    text-align: center;
}