* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #e9ecef;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-box {
    background: #ffffff;
    width: 380px;
    max-width: 100%;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    text-align: center;
}

.login-box img {
    width: 90px;
    margin-bottom: 20px;
}

.login-box h2 {
    margin: 0 0 10px 0;
    color: #333;
    font-size: 22px;
    text-transform: uppercase;
}

.login-box p {
    color: #777;
    margin-bottom: 30px;
    font-size: 14px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    outline: none;
    transition: 0.3s;
}

.form-group input:focus {
    border-color: #007bff;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.2);
}

.btn-login {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.btn-login:hover {
    background-color: #0056b3;
}

.alert {
    background-color: #f8d7da;
    color: #721c24;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-size: 14px;
    border: 1px solid #f5c6cb;
}

@media (max-width: 768px) {
    body {
        align-items: flex-start;
        padding-top: 40px;
    }

    .login-box {
        width: 100%;
        padding: 30px;
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .login-box h2 {
        font-size: 20px;
    }
}